@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,300..700;1,300..700&family=Inter:wght@300..800&family=Newsreader:ital,opsz,wght@0,6..72,200..800;1,6..72,200..800&display=swap');

:root {
    /* Fonts */
    --font-display: 'Cormorant Garamond', Georgia, serif;
    --font-serif: 'Newsreader', Georgia, serif;
    --font-ui: 'Inter', system-ui, sans-serif;

    /* Tema chiaro (default) - Carta Calda & Inchiostro */
    --bg-color: #f6f0e4;
    --paper-color: #fff8ec;
    --paper-color-soft: #f3e7d2;
    --text-primary: #2b241c;
    --text-muted: #7a6d5e;
    --border-color: #d8c8ac;
    --accent-color: #a86f32;
    --accent-hover: #8d5c28;
    --accent-light: #fdf4e7;
    --accent-soft: #c89b5a;
    --ink-blue: #243b53;
    
    --wax-seal: #a33838;
    --wax-seal-hover: #8c2e2e;
    /* Ombre stratificate per più profondità (ambient + key light) */
    --shadow-soft: 0 1px 2px rgba(43, 36, 28, 0.04), 0 4px 12px rgba(43, 36, 28, 0.05);
    --shadow-deep: 0 2px 6px rgba(43, 36, 28, 0.06), 0 14px 32px rgba(43, 36, 28, 0.10);
    --shadow-lift: 0 4px 10px rgba(43, 36, 28, 0.08), 0 22px 44px rgba(43, 36, 28, 0.14);
    --glass-overlay: rgba(246, 240, 228, 0.9);
    --transition-speed: 0.3s;

    /* Busta aperta (kraft) dietro le lettere lette */
    --envelope-bg: #cdba97;
    --envelope-flap: #c0aa83;
    --envelope-inside: #9a855f;

    /* Easing & durate condivise per micro-interazioni coerenti */
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
    --t-fast: 0.18s;
    --t-med: 0.32s;
    --t-slow: 0.5s;
    --ring: rgba(168, 111, 50, 0.45);
}

[data-theme="dark"] {
    /* Tema scuro - Inchiostro Notturno */
    --bg-color: #11100d;
    --paper-color: #1a1712;
    --paper-color-soft: #221e18;
    --text-primary: #efe6d6;
    --text-muted: #b8aa96;
    --border-color: #3a3126;
    --accent-color: #c89b5a;
    --accent-hover: #e3b373;
    --accent-light: #2a241e;
    --accent-soft: #a86f32;
    --ink-blue: #4a6572;
    
    --wax-seal: #852a2a;
    --shadow-soft: 0 1px 3px rgba(0, 0, 0, 0.35), 0 4px 15px rgba(0, 0, 0, 0.4);
    --shadow-deep: 0 2px 8px rgba(0, 0, 0, 0.45), 0 14px 30px rgba(0, 0, 0, 0.55);
    --shadow-lift: 0 6px 16px rgba(0, 0, 0, 0.5), 0 24px 48px rgba(0, 0, 0, 0.6);
    --glass-overlay: rgba(17, 16, 13, 0.9);
    --ring: rgba(200, 155, 90, 0.5);
    --envelope-bg: #2e2820;
    --envelope-flap: #3a3329;
    --envelope-inside: #1c1813;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

/* Nessun elemento può forzare uno scroll orizzontale oltre il viewport */
html {
    overflow-x: hidden;
    width: 100%;
}

/* ==================== POLISH GLOBALE ==================== */
/* Focus ring accessibile e coerente (solo da tastiera) */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
[tabindex]:focus-visible,
.nav-btn:focus-visible,
.corr-tab-btn:focus-visible,
.first-action-btn:focus-visible,
.letter-card:focus-visible {
    outline: 2px solid var(--ring);
    outline-offset: 3px;
    border-radius: 4px;
}

/* I bottoni reagiscono al tocco con un micro-affondo */
.btn {
    transition: background-color var(--t-fast) var(--ease-out),
                color var(--t-fast) var(--ease-out),
                border-color var(--t-fast) var(--ease-out),
                box-shadow var(--t-med) var(--ease-out),
                transform var(--t-fast) var(--ease-out);
    will-change: transform;
}

.btn:active {
    transform: translateY(1px) scale(0.99);
}

.btn-primary:hover {
    box-shadow: 0 6px 16px rgba(168, 111, 50, 0.28);
}

/* Riduzione movimento: niente trasformazioni o ombre animate invadenti */
@media (prefers-reduced-motion: reduce) {
    .btn:active { transform: none; }
}

body {
    background-color: var(--bg-color);
    background-image: radial-gradient(circle, var(--bg-color) 60%, rgba(43, 36, 28, 0.02) 100%);
    color: var(--text-primary);
    font-family: var(--font-ui);
    line-height: 1.6;
    min-height: 100vh;
    transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease;
    overflow-x: hidden;
    position: relative;
}

[data-theme="dark"] body {
    background-image: radial-gradient(circle, var(--bg-color) 60%, rgba(0, 0, 0, 0.3) 100%);
}

/* Paper Grain Texture (tactile feel, nearly invisible overlay) */
body::before {
    content: "";
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 9999;
    pointer-events: none;
    opacity: 0.03; /* Almost invisible, more tactile than visual */
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
}

/* Respect user's motion preferences */
@media (prefers-reduced-motion: reduce) {
    :root {
        --transition-speed: 0s !important;
    }
    * {
        animation-delay: 0s !important;
        animation-duration: 0s !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0s !important;
        scroll-behavior: auto !important;
    }
}

/* ==================== ONBOARDING FLOW STYLING ==================== */
.onboarding-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--bg-color);
    z-index: 200;
    display: none;
    justify-content: center;
    align-items: center;
    padding: 1.5rem;
    overflow-y: auto;
}

.onboarding-overlay.active {
    display: flex;
}

.onboarding-card {
    background-color: var(--paper-color);
    border: 1px solid var(--border-color);
    border-radius: 4px 6px 5px 4px / 5px 4px 6px 5px;
    padding: 3.5rem 3rem;
    max-width: 520px;
    width: 100%;
    box-shadow: var(--shadow-deep);
    text-align: center;
    display: none;
    animation: slideUp var(--transition-speed) cubic-bezier(0.165, 0.84, 0.44, 1) forwards;
}

.onboarding-card.active {
    display: block;
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.poetic-logo {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background-color: var(--accent-light);
    color: var(--accent-color);
    font-size: 2.2rem;
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 0 auto 2rem;
}

.poetic-welcome-title {
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 1.5rem;
}

.poetic-quote {
    font-family: var(--font-serif);
    font-size: 1.35rem;
    font-style: italic;
    color: var(--text-muted);
    line-height: 1.6;
    margin-bottom: 3.5rem;
}

.onboarding-title {
    font-family: var(--font-display);
    font-size: 2rem;
    margin-bottom: 0.75rem;
}

.onboarding-subtitle {
    font-size: 0.95rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
}

/* Onboarding Input Fields */
.form-group-onboarding {
    margin-bottom: 1.5rem;
    text-align: left;
}

.form-group-onboarding label {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.form-group-onboarding input {
    width: 100%;
    padding: 0.75rem 0.5rem;
    border-radius: 0;
    border: none;
    border-bottom: 1px solid var(--border-color);
    background-color: transparent;
    color: var(--text-primary);
    font-family: var(--font-ui);
    font-size: 1rem;
    outline: none;
    transition: all 0.3s ease;
}

.form-group-onboarding input:focus {
    border-color: var(--accent-color);
}

.key-generation-preview {
    background-color: var(--paper-color-soft);
    border-radius: 6px;
    padding: 1.2rem;
    margin-bottom: 2rem;
    border: 1px solid var(--border-color);
}

.key-generation-preview span {
    font-size: 0.8rem;
    color: var(--text-muted);
    display: block;
}

.key-generation-preview strong {
    font-family: var(--font-display);
    font-size: 1.45rem;
    font-weight: 600;
    color: var(--accent-color);
    display: block;
    margin: 0.4rem 0;
}

.key-microcopy {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* Wax Seal Key Card */
.wax-seal-onboarding {
    width: 70px;
    height: 70px;
    background-color: var(--wax-seal);
    color: #fff;
    border-radius: 50%;
    margin: 0 auto 1.5rem;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 2.2rem;
    box-shadow: 0 4px 12px rgba(163, 56, 56, 0.25);
}

.key-reveal-container {
    background-color: var(--paper-color-soft);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 1rem 1.25rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.key-reveal-container span {
    font-family: var(--font-display);
    font-size: 1.45rem;
    color: var(--text-primary);
    font-weight: 600;
}

.btn-copy-key {
    background: transparent;
    border: none;
    color: var(--accent-color);
    font-size: 1.2rem;
    cursor: pointer;
    transition: color 0.2s;
}

.btn-copy-key:hover {
    color: var(--accent-hover);
}

.key-instruction {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 2.5rem;
    font-style: italic;
}

/* First Action choices — affiancate quando c'è spazio (desktop/tablet),
   impilate solo su mobile stretto. align-items:stretch (default griglia) le
   tiene alla stessa altezza. */
.first-actions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr));
    gap: 1.2rem;
    margin-top: 1rem;
}

.first-action-btn {
    background-color: var(--paper-color-soft);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 1.8rem 1.5rem;
    cursor: pointer;
    transition: transform var(--t-med) var(--ease-out),
                box-shadow var(--t-med) var(--ease-out),
                border-color var(--t-med) var(--ease-out),
                background-color var(--t-med) var(--ease-out);
    text-align: center;
}

.first-action-btn:hover {
    border-color: var(--accent-color);
    transform: translateY(-3px);
    background-color: var(--paper-color);
    box-shadow: var(--shadow-lift);
}

.first-action-btn i {
    font-size: 2rem;
    color: var(--accent-color);
    margin-bottom: 0.5rem;
    transition: transform var(--t-med) var(--ease-out);
}

.first-action-btn:hover i {
    transform: scale(1.08) rotate(-3deg);
}

.first-action-btn h3 {
    font-family: var(--font-display);
    font-size: 1.2rem;
    margin-bottom: 0.3rem;
    color: var(--text-primary);
}

.first-action-btn p {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.w-100 {
    width: 100%;
}

/* ==================== APP HEADER ==================== */
header {
    max-width: 1000px;
    margin: 0 auto;
    padding: 3rem 1.5rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
}

.logo-section {
    cursor: pointer;
}

.logo-section h1 {
    font-family: var(--font-display);
    font-size: 2.4rem;
    font-weight: 500;
    letter-spacing: -0.01em;
    color: var(--text-primary);
}

.logo-section p {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-style: italic;
    margin-top: 0.2rem;
}

.controls-section {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.user-meta-header {
    background-color: transparent;
    border: none;
    padding: 0;
    font-size: 0.85rem;
    box-shadow: none;
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.user-display-name {
    font-weight: 500;
    font-family: var(--font-serif);
    font-style: italic;
    font-size: 1.05rem;
    color: var(--text-primary);
}

.user-header-key {
    color: var(--text-muted);
    border-left: 1px solid var(--border-color);
    padding-left: 0.6rem;
    cursor: pointer;
    transition: color 0.2s;
    display: flex;
    align-items: center;
    gap: 0.3rem;
    font-size: 0.8rem;
}

.user-header-key:hover {
    color: var(--accent-color);
}

.header-actions {
    display: flex;
    gap: 0.5rem;
}

.poetic-logout-btn, .theme-toggle {
    border: 1px solid transparent;
    background-color: transparent;
    color: var(--text-muted);
    width: 36px;
    height: 36px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: all 0.2s ease;
    box-shadow: none;
}

.poetic-logout-btn:hover {
    border-color: var(--border-color);
    color: var(--wax-seal);
}

/* ==================== MAIN & VIEWS ==================== */
main {
    max-width: 1000px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
    min-height: 65vh;
}

.view-section {
    display: none;
    animation: fadeIn var(--transition-speed) ease-in-out forwards;
}

.view-section.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ==================== VIEW: HOME (Correspondences) ==================== */
.home-title-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2.5rem;
}

.home-title-bar h2 {
    font-family: var(--font-display);
    font-size: 1.8rem;
    font-weight: 500;
    color: var(--text-primary);
}

.correspondences-grid {
    display: grid;
    /* min(100%, 320px) so a single column can shrink below 320px on narrow
       phones instead of forcing horizontal overflow. */
    grid-template-columns: repeat(auto-fill, minmax(min(100%, 320px), 1fr));
    gap: 2rem;
}

/* Correspondence Card: Small organic hand-cut sheet of paper */
.correspondence-card {
    background-color: var(--paper-color);
    border: 1px solid var(--border-color);
    border-radius: 4px 6px 5px 4px / 5px 4px 6px 5px;
    padding: 2rem;
    cursor: pointer;
    box-shadow: var(--shadow-soft);
    transition: transform 0.4s cubic-bezier(0.165, 0.84, 0.44, 1), box-shadow 0.4s ease, border-color 0.4s ease;
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: 180px;
}

.correspondence-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lift);
    border-color: var(--accent-color);
}

/* Preferito: filo dorato a sinistra */
.correspondence-card.is-favorite {
    border-left: 3px solid var(--accent-soft);
}

/* Stella preferito + menu azioni sulla card */
.corr-fav-toggle,
.corr-menu-btn {
    position: absolute;
    top: 0.6rem;
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.05rem;
    transition: background-color var(--t-fast) var(--ease-out), color var(--t-fast) var(--ease-out);
    z-index: 2;
}
.corr-fav-toggle { right: 2.4rem; }
.corr-menu-btn { right: 0.5rem; }
.corr-fav-toggle:hover,
.corr-menu-btn:hover { background: var(--paper-color-soft); color: var(--text-primary); }
.corr-fav-toggle.on { color: var(--accent-soft); }

/* Popover azioni */
.corr-menu {
    position: absolute;
    z-index: 300;
    min-width: 210px;
    background: var(--paper-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: var(--shadow-lift);
    padding: 0.4rem;
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
    animation: fadeIn var(--t-fast) ease both;
}
.corr-menu button {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    width: 100%;
    text-align: left;
    background: transparent;
    border: none;
    border-radius: 5px;
    padding: 0.55rem 0.7rem;
    font-family: var(--font-ui);
    font-size: 0.9rem;
    color: var(--text-primary);
    cursor: pointer;
    transition: background-color var(--t-fast) var(--ease-out);
}
.corr-menu button:hover { background: var(--paper-color-soft); }
.corr-menu button i { color: var(--text-muted); }
.corr-menu button.danger { color: var(--wax-seal); }
.corr-menu button.danger i { color: var(--wax-seal); }

/* Barra ordinamento */
.corr-sort-bar {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    margin-bottom: 1.25rem;
}
.corr-sort-label { font-size: 0.82rem; color: var(--text-muted); margin-right: 0.2rem; }
.corr-sort-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 999px;
    padding: 0.3rem 0.9rem;
    font-size: 0.82rem;
    font-family: var(--font-ui);
    color: var(--text-muted);
    cursor: pointer;
    transition: all var(--t-fast) var(--ease-out);
}
.corr-sort-btn:hover { border-color: var(--accent-color); color: var(--text-primary); }
.corr-sort-btn.active { border-color: var(--accent-color); color: var(--accent-color); background: var(--paper-color-soft); }

/* Sezioni Archiviati / Bloccati */
.corr-section {
    margin-top: 1.5rem;
    border-top: 1px dashed var(--border-color);
    padding-top: 1rem;
}
.corr-section > summary {
    cursor: pointer;
    font-family: var(--font-display);
    font-size: 1.15rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    list-style: none;
}
.corr-section > summary::-webkit-details-marker { display: none; }
.corr-section > summary i { color: var(--text-muted); }
.corr-section-count {
    font-family: var(--font-ui);
    font-size: 0.75rem;
    color: var(--text-muted);
    background: var(--paper-color-soft);
    border: 1px solid var(--border-color);
    border-radius: 999px;
    padding: 0.05rem 0.5rem;
}
.corr-section-list { margin-top: 0.8rem; display: flex; flex-direction: column; gap: 0.4rem; }
.corr-section-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
    padding: 0.6rem 0.85rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background: var(--paper-color);
}
.corr-section-name { font-family: var(--font-display); font-size: 1.05rem; color: var(--text-primary); }
.corr-section-actions { display: flex; gap: 0.4rem; }
.corr-section-actions button {
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    padding: 0.35rem 0.7rem;
    font-size: 0.8rem;
    font-family: var(--font-ui);
    color: var(--text-muted);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    transition: all var(--t-fast) var(--ease-out);
}
.corr-section-actions button:hover { border-color: var(--accent-color); color: var(--text-primary); }
.corr-section-actions button.danger:hover { border-color: var(--wax-seal); color: var(--wax-seal); }

.corr-card-top {
    display: flex;
    align-items: center;
    gap: 1.2rem;
}

.corr-card-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background-color: var(--paper-color-soft);
    color: var(--accent-color);
    display: flex;
    justify-content: center;
    align-items: center;
    font-family: var(--font-display);
    font-size: 1.4rem;
    font-weight: 500;
    border: 1px solid var(--border-color);
}

.corr-card-details h3 {
    font-family: var(--font-display);
    font-size: 1.3rem;
    font-weight: 500;
    color: var(--text-primary);
}

.corr-card-details p {
    font-family: var(--font-serif);
    font-size: 0.9rem;
    color: var(--text-muted);
    font-style: italic;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 200px;
    margin-top: 0.15rem;
}

.corr-card-meta {
    font-size: 0.8rem;
    color: var(--text-muted);
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px dashed var(--border-color);
    padding-top: 0.75rem;
    font-family: var(--font-ui);
}

.corr-card-meta strong {
    font-weight: 500;
    color: var(--accent-color);
}

/* Empty state */
.empty-state-poetic {
    grid-column: 1 / -1;
    text-align: center;
    padding: 6rem 2rem;
    background-color: var(--paper-color);
    border: 1px dashed var(--border-color);
    border-radius: 6px;
    color: var(--text-muted);
}

.empty-state-poetic i {
    font-size: 3rem;
    color: var(--accent-soft);
    margin-bottom: 1.5rem;
    opacity: 0.6;
}

.empty-state-poetic h3 {
    font-family: var(--font-display);
    font-size: 1.6rem;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
    font-weight: 500;
}

.empty-state-poetic p {
    max-width: 400px;
    margin: 0 auto;
    font-size: 0.95rem;
    line-height: 1.6;
}

/* ==================== VIEW: CORRESPONDENCE DETAIL ==================== */
.corr-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1.5rem;
    margin-bottom: 2.5rem;
}

.btn-back {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    padding: 0.6rem 1.2rem;
    border-radius: 4px;
    font-family: var(--font-ui);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.25s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-back:hover {
    color: var(--text-primary);
    background-color: var(--paper-color-soft);
    border-color: var(--accent-color);
}

.corr-partner-info {
    text-align: right;
}

.corr-partner-info h2 {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 500;
    color: var(--text-primary);
}

.corr-partner-info p {
    font-family: var(--font-serif);
    font-size: 0.9rem;
    color: var(--text-muted);
    font-style: italic;
    margin-top: 0.15rem;
}

/* Recapito epistolare del corrispondente (tra nome e firma) */
.corr-partner-key {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    margin-top: 0.3rem;
    font-family: var(--font-ui);
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    color: var(--accent-color);
    cursor: pointer;
    transition: color 0.2s ease;
}

.corr-partner-key:hover {
    color: var(--accent-hover);
}

/* Tab menu designed as actual notebook bookmarks/dividers */
.corr-tabs {
    display: flex;
    justify-content: flex-start;
    gap: 0.5rem;
    margin-bottom: 2.5rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0;
}

.corr-tab-btn {
    background: transparent;
    border: 1px solid transparent;
    border-bottom: none;
    font-family: var(--font-display);
    font-size: 1.15rem;
    color: var(--text-muted);
    padding: 0.6rem 1.5rem;
    cursor: pointer;
    border-radius: 6px 6px 0 0;
    transition: all 0.25s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    position: relative;
    top: 1px; /* Overlap border-bottom for physical merge */
    z-index: 1;
}

.corr-tab-btn:hover {
    color: var(--text-primary);
    background-color: var(--paper-color-soft);
}

.corr-tab-btn.active {
    color: var(--accent-color);
    background-color: var(--paper-color);
    border-color: var(--border-color);
    border-bottom: 1px solid var(--paper-color); /* Hides bottom border line */
    font-weight: 500;
}

.corr-subview {
    display: none;
}

.corr-subview.active {
    display: block;
    animation: fadeIn var(--transition-speed) ease;
}

/* Letters Grid */
.letters-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 2rem;
}

/* Elegant Envelope / Letter Cards (hand-cut sheet of paper) */
.letter-card {
    background-color: var(--paper-color);
    border: 1px solid var(--border-color);
    border-radius: 4px 6px 5px 4px / 5px 4px 6px 5px;
    padding: 2.2rem;
    position: relative;
    cursor: pointer;
    box-shadow: var(--shadow-soft);
    transition: transform 0.4s cubic-bezier(0.165, 0.84, 0.44, 1), box-shadow 0.4s ease, border-color 0.4s ease;
    display: flex;
    flex-direction: column;
    height: 300px;
    overflow: hidden;
    perspective: 1100px; /* per l'apertura della linguetta (rotateX) */
}

.letter-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-deep);
    border-color: var(--accent-color);
}

/* Envelope/Wax Seal Styling */
.letter-envelope {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--paper-color);
    z-index: 2;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    border-radius: 4px 6px 5px 4px / 5px 4px 6px 5px;
    transition: transform 0.7s cubic-bezier(0.62, 0, 0.2, 1), opacity 0.5s ease;
    border: 1px solid var(--border-color);
    transform-origin: center top; /* cardine in alto: la busta si apre come una linguetta */
    backface-visibility: hidden;
}

.letter-envelope::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 50%;
    border-bottom: 1px solid var(--border-color);
    background: linear-gradient(180deg, rgba(43, 36, 28, 0.01) 0%, rgba(43, 36, 28, 0.03) 100%);
    clip-path: polygon(0 0, 100% 0, 50% 100%);
}

.wax-seal {
    width: 50px;
    height: 50px;
    background-color: var(--wax-seal);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    color: #fff;
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 1.4rem;
    box-shadow: 0 4px 10px rgba(163, 56, 56, 0.25), inset 0 2px 4px rgba(255,255,255,0.15);
    z-index: 3;
    cursor: pointer;
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    user-select: none;
    border: 1.5px solid rgba(0,0,0,0.1);
}

.letter-card:hover .wax-seal {
    transform: scale(1.08) rotate(6deg);
}

.envelope-meta {
    margin-top: 1.5rem;
    text-align: center;
    font-family: var(--font-serif);
    font-style: italic;
    color: var(--text-muted);
    font-size: 0.85rem;
    z-index: 3;
}

.envelope-title {
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 500;
    margin-top: 0.4rem;
    color: var(--text-primary);
    z-index: 3;
    max-width: 80%;
    text-align: center;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Apertura busta: la linguetta si solleva e si ripiega all'indietro */
.letter-card.open .letter-envelope {
    transform: rotateX(-122deg);
    opacity: 0.35;
    pointer-events: none;
}

/* Il foglio emerge dalla busta (solo sull'azione di apertura, via .just-opened) */
.letter-card.just-opened .letter-inner {
    animation: letterEmerge 0.6s var(--ease-out) 0.18s both;
}
@keyframes letterEmerge {
    from { transform: translateY(22px); opacity: 0; }
    to   { transform: translateY(0); opacity: 1; }
}

/* ---- Busta aperta dietro le lettere lette/aperte ----
   La card diventa una busta in kraft; il foglio (letter-inner) emerge come
   estratto, con la linguetta sollevata in alto e il bordo busta sui lati/fondo. */
.letter-card.open {
    background-color: var(--envelope-bg);
    padding: 0;
    box-shadow: var(--shadow-soft);
}

/* Linguetta aperta (triangolo ripiegato) dietro il foglio */
.letter-card.open::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 30px;
    z-index: 0;
    background: linear-gradient(180deg, var(--envelope-flap) 0%, var(--envelope-bg) 100%);
    clip-path: polygon(0 0, 100% 0, 50% 100%);
}

/* Linea d'ombra dove la linguetta incontra il foglio */
.letter-card.open::after {
    content: '';
    position: absolute;
    top: 22px;
    left: 8px;
    right: 8px;
    height: 10px;
    z-index: 1;
    background: radial-gradient(ellipse at 50% 0%, rgba(20, 16, 12, 0.18), transparent 70%);
    pointer-events: none;
}

/* Inner Letter Card content */
.letter-inner {
    display: flex;
    flex-direction: column;
    height: 100%;
}

/* Il foglio estratto: galleggia sopra la busta con i bordi kraft a vista */
.letter-card.open .letter-inner {
    position: relative;
    z-index: 2;
    height: auto;
    flex: 1;
    margin: 22px 9px 9px;
    padding: 1.6rem 1.5rem;
    background-color: var(--paper-color);
    border-radius: 2px 3px 2px 3px;
    box-shadow: 0 5px 14px rgba(20, 16, 12, 0.16);
}

.card-category {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--accent-color);
    margin-bottom: 0.6rem;
    font-family: var(--font-ui);
}

.card-title {
    font-family: var(--font-display);
    font-size: 1.45rem;
    font-weight: 500;
    line-height: 1.3;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.card-preview {
    font-family: var(--font-serif);
    font-size: 0.95rem;
    color: var(--text-muted);
    font-style: italic;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: auto;
}

.card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1rem;
    border-top: 1px dashed var(--border-color);
    font-size: 0.8rem;
    color: var(--text-muted);
    font-family: var(--font-ui);
}

.card-date {
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.card-status-pill {
    background-color: var(--paper-color-soft);
    padding: 0.2rem 0.6rem;
    border-radius: 4px;
    font-size: 0.75rem;
    border: 1px solid var(--border-color);
    color: var(--text-muted);
}

/* SPECIAL CARD: Future Letter in Transit (Clessidra) */
.letter-card-transit {
    background-color: var(--paper-color);
    border: 1px dashed var(--border-color);
    border-radius: 4px 6px 5px 4px / 5px 4px 6px 5px;
    padding: 2.5rem 2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    height: 300px;
    position: relative;
    box-shadow: var(--shadow-soft);
}

/* Hourglass CSS Animation */
.clessidra-container {
    width: 60px;
    height: 60px;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 1.5rem;
}

.clessidra {
    font-size: 2.5rem;
    color: var(--accent-color);
    display: inline-block;
    animation: rotateHourglass 4s infinite cubic-bezier(0.77, 0, 0.175, 1);
}

@keyframes rotateHourglass {
    0% { transform: rotate(0deg); }
    45% { transform: rotate(0deg); }
    55% { transform: rotate(180deg); }
    100% { transform: rotate(180deg); }
}

.transit-title {
    font-family: var(--font-serif);
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.transit-desc {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-style: italic;
    margin-bottom: 1.5rem;
}

/* Poetical Progress Bar */
.poetic-progress-wrapper {
    width: 100%;
    max-width: 200px;
}

.poetic-progress-bar {
    width: 100%;
    height: 3px;
    background-color: var(--bg-color);
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 0.5rem;
    border: 1px solid var(--border-color);
}

.poetic-progress-fill {
    height: 100%;
    background-color: var(--accent-color);
    width: 0%;
    transition: width 1s linear;
}

.poetic-time-remaining {
    font-size: 0.75rem;
    color: var(--accent-color);
    font-weight: 500;
}

/* Write shortcut */
.write-trigger-card {
    background-color: transparent;
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    height: 300px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.3s ease;
}

.write-trigger-card:hover {
    border-color: var(--accent-color);
    color: var(--text-primary);
    background-color: var(--paper-color);
    transform: translateY(-4px);
}

.write-trigger-card i {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--accent-color);
}

.write-trigger-card p {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    font-style: italic;
}

/* ==================== WRITING STUDIO ==================== */
.writing-container {
    max-width: 800px;
    margin: 0 auto;
    background-color: var(--paper-color);
    border: 1px solid var(--border-color);
    border-radius: 4px 6px 5px 4px / 5px 4px 6px 5px;
    padding: 3.5rem 4rem;
    box-shadow: var(--shadow-deep);
    position: relative;
}

.writing-container::before {
    content: '';
    position: absolute;
    left: 45px; /* generous margin space */
    top: 0;
    bottom: 0;
    width: 1px;
    background-color: rgba(163, 56, 56, 0.15); /* Red margin line */
}

.writer-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2.5rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1rem;
}

.writer-header h2 {
    font-family: var(--font-display);
    font-size: 1.8rem;
    font-weight: 500;
    color: var(--text-primary);
}

.category-selector {
    display: flex;
    gap: 0.4rem;
}

.cat-btn {
    border: 1px solid var(--border-color);
    background: transparent;
    padding: 0.4rem 1rem;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-muted);
    cursor: pointer;
    font-family: var(--font-ui);
    transition: all 0.25s ease;
}

.cat-btn:hover, .cat-btn.active {
    border-color: var(--accent-color);
    color: var(--accent-color);
    background-color: var(--paper-color-soft);
}

.form-group {
    margin-bottom: 2rem;
}

.input-title {
    width: 100%;
    border: none;
    border-bottom: 1px solid var(--border-color);
    background: transparent;
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 500;
    padding: 0.5rem 0;
    color: var(--text-primary);
    outline: none;
    transition: border-color 0.3s ease;
}

.input-title:focus {
    border-color: var(--accent-color);
}

.paper-textarea-wrapper {
    position: relative;
    background: repeating-linear-gradient(
        transparent,
        transparent 31px,
        var(--paper-line) 31px,
        var(--paper-line) 32px
    );
    margin-top: 1rem;
}

.input-content {
    width: 100%;
    min-height: 320px;
    border: none;
    background: transparent;
    font-family: var(--font-serif);
    font-size: 1.2rem;
    line-height: 32px;
    padding: 0.5rem 0;
    color: var(--text-primary);
    outline: none;
    resize: none;
    white-space: pre-wrap;
    overflow-y: hidden;
}

/* Delivery Settings in Form */
.delivery-settings {
    margin-top: 2.5rem;
    border-top: 1px solid var(--border-color);
    padding-top: 2rem;
}

.delivery-settings h3 {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    margin-bottom: 0.4rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.delivery-desc {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 1.2rem;
}

.delivery-presets {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.delivery-preset-option {
    cursor: pointer;
}

.delivery-preset-option input {
    display: none;
}

.preset-label {
    display: inline-block;
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: var(--bg-color);
    font-size: 0.85rem;
    transition: all 0.3s ease;
}

.delivery-preset-option input:checked + .preset-label {
    background-color: var(--accent-light);
    border-color: var(--accent-color);
    color: var(--accent-color);
    font-weight: 500;
}

.custom-date-container {
    margin-top: 1rem;
    animation: fadeIn 0.3s ease;
}

.custom-date-input {
    border: 1px solid var(--border-color);
    background-color: var(--bg-color);
    color: var(--text-primary);
    padding: 0.6rem 1rem;
    border-radius: 4px;
    font-family: var(--font-sans);
    outline: none;
}

.custom-date-input:focus {
    border-color: var(--accent-color);
}

.writer-actions {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    margin-top: 2.5rem;
}

/* Form di scrittura a step */
.write-step { display: none; }
.write-step.active { display: block; animation: fadeIn var(--t-med) ease both; }

.write-steps-indicator {
    display: flex;
    gap: 0.4rem;
    align-items: center;
}
.ws-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--border-color);
    transition: background-color var(--t-med) var(--ease-out);
}
.ws-dot.active { background: var(--accent-color); }

/* Button variants */
.btn {
    border: none;
    padding: 0.8rem 1.8rem;
    border-radius: 4px;
    font-family: var(--font-sans);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-secondary {
    background-color: transparent;
    color: var(--text-muted);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    color: var(--text-primary);
    background-color: var(--accent-light);
}

.btn-primary {
    background-color: var(--accent-color);
    color: #fff;
    box-shadow: 0 4px 12px rgba(196, 150, 70, 0.2);
}

[data-theme="dark"] .btn-primary {
    color: #0e1014;
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(196, 150, 70, 0.3);
}

.btn-icon {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* ==================== ELEGANT OVERLAY MODAL ==================== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(14, 16, 20, 0.55);
    backdrop-filter: blur(8px);
    z-index: 100;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.4s ease;
    padding: 1.5rem;
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.modal-content {
    background-color: var(--paper-color);
    border: 1px solid var(--border-color);
    border-radius: 4px 6px 5px 4px / 5px 4px 6px 5px;
    width: 100%;
    max-width: 750px;
    max-height: 85vh;
    overflow-y: auto;
    padding: 4rem;
    box-shadow: var(--shadow-lift);
    position: relative;
    transform: scale(0.95) translateY(15px);
    transition: transform 0.4s cubic-bezier(0.165, 0.84, 0.44, 1), opacity 0.4s ease;
}

.modal-overlay.active .modal-content {
    transform: scale(1) translateY(0);
}

/* Modal Impostazioni: padding più contenuto del default (override su mobile
   dalla media query .modal-content) */
.settings-modal-content {
    padding: 3rem 2.5rem;
}

.modal-close {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    cursor: pointer;
    transition: all 0.25s ease;
    width: 36px;
    height: 36px;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 50%;
}

.modal-close:hover {
    color: var(--text-primary);
    background-color: var(--paper-color-soft);
}

/* Reading modal details */
.letter-full-category {
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--accent-color);
    margin-bottom: 1rem;
    text-align: center;
    font-family: var(--font-ui);
}

.letter-full-title {
    font-family: var(--font-display);
    font-size: 2.2rem;
    font-weight: 500;
    line-height: 1.25;
    text-align: center;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.letter-full-meta {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    font-size: 0.85rem;
    color: var(--text-muted);
    font-style: italic;
    border-bottom: 1px dashed var(--border-color);
    padding-bottom: 1.5rem;
    margin-bottom: 2.5rem;
    font-family: var(--font-ui);
}

.letter-full-body {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    line-height: 1.8;
    color: var(--text-primary);
    white-space: pre-wrap;
    min-height: 180px;
}

.letter-full-signature {
    margin-top: 4rem;
    text-align: right;
    font-family: var(--font-serif);
    font-style: italic;
    font-size: 1.3rem;
    color: var(--accent-color);
}

.reading-actions {
    margin-top: 3.5rem;
    border-top: 1px dashed var(--border-color);
    padding-top: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.reading-actions-right {
    display: flex;
    gap: 0.75rem;
    align-items: center;
}

/* ==================== LETTURA IMMERSIVA DELLA LETTERA ==================== */
/* Il lettore è un foglio ampio e centrato; su mobile occupa tutto lo schermo. */
.reading-letter {
    max-width: 680px;
}

/* Indicatore di stato (già letta / reclamata / in viaggio ...) */
.letter-full-status {
    display: flex;
    width: fit-content;
    align-items: center;
    gap: 0.4rem;
    font-family: var(--font-ui);
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-muted);
    background: var(--paper-color-soft);
    border: 1px solid var(--border-color);
    border-radius: 999px;
    padding: 0.3rem 0.85rem;
    margin: 0 auto 1.25rem;
}

.letter-full-status.is-arrived { color: var(--accent-color); border-color: var(--accent-soft); }
.letter-full-status.is-transit { color: var(--ink-blue); }
.letter-full-status.is-error   { color: var(--wax-seal); border-color: var(--wax-seal); }

/* Stato vuoto/errore dentro il lettore */
.reading-empty {
    text-align: center;
    padding: 2rem 0 1rem;
}
.reading-empty i {
    font-size: 2.5rem;
    color: var(--text-muted);
    display: block;
    margin-bottom: 1rem;
}
.reading-empty h3 {
    font-family: var(--font-display);
    font-size: 1.6rem;
    margin-bottom: 0.5rem;
}
.reading-empty p {
    color: var(--text-muted);
    font-style: italic;
}

/* --- Apertura progressiva: gli elementi affiorano in sequenza --- */
#read-modal .letter-full-status,
#read-modal .letter-full-category,
#read-modal .letter-full-title,
#read-modal .letter-full-meta,
#read-modal .letter-full-body,
#read-modal .letter-full-signature,
#read-modal .reading-actions {
    opacity: 0;
}

#read-modal.active .letter-full-status   { animation: letterReveal 0.5s ease forwards 0.10s; }
#read-modal.active .letter-full-category { animation: letterReveal 0.5s ease forwards 0.18s; }
#read-modal.active .letter-full-title    { animation: letterReveal 0.5s ease forwards 0.30s; }
#read-modal.active .letter-full-meta     { animation: letterReveal 0.5s ease forwards 0.42s; }
#read-modal.active .letter-full-body     { animation: letterReveal 0.6s ease forwards 0.54s; }
#read-modal.active .letter-full-signature{ animation: letterReveal 0.5s ease forwards 0.72s; }
#read-modal.active .reading-actions      { animation: letterReveal 0.5s ease forwards 0.86s; }

@keyframes letterReveal {
    from { opacity: 0; transform: translateY(12px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* Su mobile la lettura è a tutto schermo, non una modale minuscola */
@media (max-width: 768px) {
    #read-modal {
        padding: 0;
    }
    #read-modal .reading-letter {
        max-width: 100%;
        width: 100%;
        height: 100%;
        max-height: 100%;
        border-radius: 0;
        padding: 3.5rem 1.5rem 2.5rem;
    }
}

/* Modal Search / Result */
.add-corr-content {
    max-width: 500px;
    padding: 3rem;
}

.modal-title-poetic {
    font-family: var(--font-display);
    font-size: 1.8rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    text-align: center;
    color: var(--text-primary);
}

.modal-subtitle-poetic {
    font-family: var(--font-serif);
    font-style: italic;
    font-size: 0.95rem;
    color: var(--text-muted);
    text-align: center;
    margin-bottom: 2rem;
}

.form-group-search {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.form-group-search input {
    width: 100%;
    padding: 0.75rem 0.5rem;
    border: none;
    border-bottom: 1px solid var(--border-color);
    border-radius: 0;
    background-color: transparent;
    color: var(--text-primary);
    font-family: var(--font-ui);
    outline: none;
    font-size: 1rem;
    transition: border-color 0.25s ease;
}

.form-group-search input:focus {
    border-color: var(--accent-color);
}

.search-result-container {
    margin-top: 1.5rem;
    text-align: center;
    animation: fadeIn var(--transition-speed) ease;
}

.search-status-message {
    font-size: 0.9rem;
    color: var(--text-muted);
    font-style: italic;
}

.search-result-card {
    background-color: var(--paper-color-soft);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 1.5rem;
    margin-top: 0.5rem;
}

.search-result-card h4 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 500;
    margin-bottom: 0.4rem;
}

.search-result-card p {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 1.2rem;
    font-style: italic;
}

/* Post-send sealed animation modal */
.sealed-animation-content {
    max-width: 420px;
    padding: 3.5rem 2rem;
    text-align: center;
}

/* Contenitore Lottie del sigillo (mostrato solo se l'animazione carica) */
.seal-lottie {
    width: 132px;
    height: 132px;
    margin: 0 auto 1.5rem;
    display: none;
}

.wax-seal-animation {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background-color: var(--wax-seal);
    color: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 2rem;
    margin: 0 auto 1.5rem;
    box-shadow: 0 4px 15px rgba(163, 56, 56, 0.25);
    animation: pulseSeal 1.5s infinite ease-in-out;
}

@keyframes pulseSeal {
    0% { transform: scale(1); }
    50% { transform: scale(1.08); box-shadow: 0 6px 20px rgba(163, 56, 56, 0.4); }
    100% { transform: scale(1); }
}

.poetic-seal-title {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.poetic-seal-desc {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-style: italic;
    margin-bottom: 0.6rem;
}

.poetic-seal-subtext {
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-bottom: 1.8rem;
}

/* ==================== CERALACCA (SIGILLO) ==================== */
:root {
    --seal-burgundy: #7d2233;
    --seal-antique-gold: #a87a3c;
    --seal-forest-green: #2f5638;
    --seal-midnight-blue: #283f63;
}

/* Componente sigillo SVG (anteprima, card, lettore, rituale) */
.wax-seal-svg {
    display: inline-flex;
    line-height: 0;
}
.wax-seal-svg svg {
    width: 100%;
    height: 100%;
    display: block;
}
/* Rilievo/ombra differenziano gli stili oltre al colore */
.seal-style-classic,
.seal-style-organic {
    filter: drop-shadow(0 2px 4px rgba(20, 16, 12, 0.30)) drop-shadow(0 7px 12px rgba(20, 16, 12, 0.18));
}
.seal-style-organic {
    transform: rotate(-4deg);
}
.seal-style-minimal {
    filter: drop-shadow(0 2px 5px rgba(20, 16, 12, 0.18));
}

/* Glyph del sigillo nella modale di sigillatura */
.seal-glyph {
    width: 96px;
    height: 96px;
    margin: 0 auto 1.5rem;
    display: none;
}
.seal-glyph.show {
    display: block;
}
/* Rituale: il sigillo scende, PREME e schiaccia la cera, poi si assesta.
   Lento e solenne, senza rimbalzo (nessuna scala finale > 1).
   transform-origin in basso così il "premere" affonda sulla carta. */
.seal-glyph.stamping .wax-seal-svg {
    transform-origin: 50% 100%;
    animation: sealStamp 0.85s cubic-bezier(0.22, 1, 0.36, 1) both;
}
@keyframes sealStamp {
    0%   { transform: translateY(-24px) scale(1.16); opacity: 0; }
    35%  { transform: translateY(0) scale(1.05); opacity: 1; }   /* contatto */
    55%  { transform: translateY(0) scaleX(1.08) scaleY(0.88); } /* pressione: la cera si schiaccia */
    74%  { transform: translateY(0) scaleX(0.985) scaleY(1.015); } /* leggero ritorno */
    100% { transform: translateY(0) scale(1); }
}

/* ---- Selettore della ceralacca ---- */
.seal-picker {
    margin-top: 2rem;
    border-top: 1px solid var(--border-color);
    padding-top: 1.5rem;
}
.seal-picker > h3 {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    margin-bottom: 0.3rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.seal-picker .seal-hint {
    font-size: 0.82rem;
    color: var(--text-muted);
    margin-bottom: 1.2rem;
}
.seal-picker-layout {
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
    flex-wrap: wrap;
}
.seal-picker-controls {
    flex: 1;
    min-width: 220px;
}
.seal-field-label {
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin: 0 0 0.5rem;
}
.seal-color-row {
    display: flex;
    gap: 0.6rem;
    flex-wrap: wrap;
    margin-bottom: 1.2rem;
}
.seal-swatch {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    border: 2px solid transparent;
    box-shadow: inset 0 0 0 2px var(--paper-color), 0 2px 5px rgba(43, 36, 28, 0.2);
    cursor: pointer;
    padding: 0;
    position: relative;
    transition: transform var(--t-fast) var(--ease-out);
}
.seal-swatch:hover { transform: scale(1.08); }
.seal-swatch[aria-pressed="true"] {
    border-color: var(--accent-color);
}
/* Spunta interna: lo stato non è dato solo dal colore */
.seal-swatch[aria-pressed="true"]::after {
    content: "\2713";
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 0.8rem;
    text-shadow: 0 1px 2px rgba(0,0,0,0.4);
}
.seal-style-row {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}
.seal-style-btn {
    border: 1px solid var(--border-color);
    background: transparent;
    color: var(--text-muted);
    border-radius: 4px;
    padding: 0.4rem 0.9rem;
    font-size: 0.82rem;
    font-family: var(--font-ui);
    cursor: pointer;
    transition: all var(--t-fast) var(--ease-out);
}
.seal-style-btn:hover { border-color: var(--accent-color); color: var(--text-primary); }
.seal-style-btn[aria-pressed="true"] {
    border-color: var(--accent-color);
    color: var(--accent-color);
    background: var(--paper-color-soft);
}
.seal-preview {
    width: 96px;
    height: 96px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* La ceralacca colorata sulla busta della card (sostituisce il cerchio piatto) */
.wax-seal.has-seal {
    background: transparent !important;
    box-shadow: none !important;
}
.wax-seal .wax-seal-svg { width: 100%; height: 100%; }

/* Sigillo nel lettore, sopra la categoria */
.reader-seal {
    width: 54px;
    height: 54px;
    margin: 0 auto 1rem;
    display: none;
}
.reader-seal.show { display: block; }

/* Pulsante "Rivedi l'apertura" nel lettore */
.reader-replay {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    width: fit-content;
    margin: 0 auto 1.2rem;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 999px;
    padding: 0.35rem 0.95rem;
    font-family: var(--font-ui);
    font-size: 0.78rem;
    color: var(--text-muted);
    cursor: pointer;
    transition: border-color var(--t-fast) var(--ease-out), color var(--t-fast) var(--ease-out);
}
.reader-replay:hover { border-color: var(--accent-color); color: var(--accent-color); }

/* Bottone archivia su una lettera */
.letter-archive-btn {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    z-index: 4;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    border: none;
    background: var(--paper-color-soft);
    color: var(--text-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.95rem;
    opacity: 0.7;
    transition: opacity var(--t-fast) var(--ease-out), color var(--t-fast) var(--ease-out);
}
.letter-archive-btn:hover { opacity: 1; color: var(--accent-color); }

/* ==================== FREEWRITE ==================== */
.freewrite-privacy {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    background: var(--paper-color-soft);
    border: 1px solid var(--border-color);
    border-left: 3px solid var(--accent-color);
    border-radius: 6px;
    padding: 0.75rem 1rem;
    margin-bottom: 1.5rem;
    font-size: 0.85rem;
    color: var(--text-muted);
}
.freewrite-privacy i { color: var(--accent-color); font-size: 1.1rem; }

/* Layout centrato: lista compatta in alto + foglio di scrittura al centro,
   staccato dallo schermo (come leggere una lettera). */
.freewrite-layout {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    max-width: 760px;
    margin: 0 auto;
}

.freewrite-list {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 0.4rem;
}
.freewrite-list-empty {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-style: italic;
    padding: 0.5rem;
}
.freewrite-item {
    text-align: left;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 999px;
    padding: 0.4rem 0.9rem;
    cursor: pointer;
    display: inline-flex;
    align-items: baseline;
    gap: 0.5rem;
    transition: border-color var(--t-fast) var(--ease-out), background-color var(--t-fast) var(--ease-out);
}
.freewrite-item:hover { border-color: var(--accent-color); background: var(--paper-color-soft); }
.freewrite-item.active { border-color: var(--accent-color); background: var(--paper-color-soft); }
.fw-item-title {
    font-family: var(--font-display);
    font-size: 1rem;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 180px;
}
.fw-item-date { font-size: 0.7rem; color: var(--text-muted); }

/* Foglio di scrittura: centrato e "staccato", come la lettura di una lettera */
.freewrite-editor {
    background: var(--paper-color);
    border: 1px solid var(--border-color);
    border-radius: 4px 6px 5px 4px / 5px 4px 6px 5px;
    padding: 3rem 3.25rem;
    box-shadow: var(--shadow-lift);
    min-height: 62vh;
    width: 100%;
}
.freewrite-empty {
    text-align: center;
    padding: 4rem 1rem;
    color: var(--text-muted);
}
.freewrite-empty i { font-size: 2.5rem; color: var(--accent-soft); display: block; margin-bottom: 1rem; }
.freewrite-empty h3 { font-family: var(--font-display); font-size: 1.5rem; color: var(--text-primary); margin-bottom: 0.4rem; }

.freewrite-title-input {
    width: 100%;
    border: none;
    border-bottom: 1px solid var(--border-color);
    background: transparent;
    font-family: var(--font-display);
    font-size: 1.8rem;
    font-weight: 500;
    padding: 0.3rem 0;
    color: var(--text-primary);
    outline: none;
    transition: border-color var(--t-fast) var(--ease-out);
}
.freewrite-title-input:focus { border-color: var(--accent-color); }

.freewrite-status {
    font-size: 0.78rem;
    color: var(--text-muted);
    margin: 0.6rem 0 1rem;
    display: flex;
    align-items: center;
    gap: 0.35rem;
}
.freewrite-status i { color: var(--accent-color); }
.freewrite-status.is-error { color: var(--wax-seal); }
.freewrite-status.is-error i { color: var(--wax-seal); }

.freewrite-paper { margin-top: 0.5rem; }
.freewrite-paper .input-content { min-height: 320px; }

.freewrite-actions {
    display: flex;
    gap: 0.6rem;
    flex-wrap: wrap;
    margin-top: 1.5rem;
    padding-top: 1.2rem;
    border-top: 1px dashed var(--border-color);
}
.btn-danger-soft { margin-left: auto; }
.btn-danger-soft:hover {
    border-color: var(--wax-seal);
    color: var(--wax-seal);
}

@media (max-width: 768px) {
    .freewrite-editor { padding: 1.75rem 1.25rem; }
    .btn-danger-soft { margin-left: 0; }
}

/* ==================== APERTURA BUSTA (overlay scena) ====================
   Tecnica: prospettiva "baked-in" nel transform dell'elemento — perspective()
   nella funzione transform, NON sul genitore — così lo z-index resta affidabile
   mentre il lembo ruota oltre i 90°. */
.letter-opening-overlay {
    position: fixed;
    inset: 0;
    z-index: 250;
    display: none;
    align-items: center;
    justify-content: center;
    background: rgba(14, 16, 20, 0.7);
    backdrop-filter: blur(6px);
}
.letter-opening-overlay.active { display: flex; }

.lo-stage {
    position: relative;
    width: min(360px, 88vw);
    height: min(560px, 80vh);
    overflow: hidden;
}
.lo-envelope {
    position: absolute;
    bottom: 8%;
    left: 50%;
    width: 320px;
    margin-left: -160px;
    height: 216px;
}
.lo-back {
    position: absolute;
    inset: 0;
    background: var(--envelope-inside);
    border-radius: 8px;
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.45);
    z-index: 1;
}
.lo-letter {
    position: absolute;
    left: 50%;
    top: 14px;
    margin-left: -142px;
    width: 284px;
    height: 340px;
    background: var(--paper-color);
    border-radius: 4px;
    padding: 26px 24px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
    z-index: 2;
}
.lo-letter-cat {
    font-family: var(--font-ui);
    font-size: 0.68rem;
    font-weight: 600;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--accent-color);
    margin-bottom: 0.6rem;
}
.lo-letter-title {
    font-family: var(--font-display);
    font-size: 1.4rem;
    font-weight: 500;
    color: var(--text-primary);
    line-height: 1.25;
    margin-bottom: 0.8rem;
}
.lo-letter-preview {
    font-family: var(--font-serif);
    font-style: italic;
    font-size: 0.92rem;
    color: var(--text-muted);
    line-height: 1.6;
    white-space: pre-line;
}
.lo-front {
    position: absolute;
    inset: 0;
    z-index: 3;
    border-radius: 8px;
    background: linear-gradient(130deg, var(--envelope-flap) 0%, var(--envelope-bg) 100%);
    clip-path: polygon(0 0, 50% 55%, 100% 0, 100% 100%, 0 100%);
}
.lo-flap-wrap {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 122px;
    z-index: 5;
    transform-origin: top center;
}
.lo-flap-shape {
    position: absolute;
    inset: 0;
    background: linear-gradient(160deg, var(--envelope-flap) 0%, var(--envelope-bg) 100%);
    clip-path: polygon(0 0, 100% 0, 50% 100%);
}
.lo-seal {
    position: absolute;
    top: 84px;
    left: 50%;
    margin-left: -23px;
    width: 46px;
    height: 46px;
}
.lo-skip {
    position: absolute;
    bottom: 28px;
    left: 50%;
    transform: translateX(-50%);
    background: transparent;
    border: 1px solid rgba(244, 239, 230, 0.35);
    color: #f4efe6;
    padding: 0.5rem 1.4rem;
    border-radius: 999px;
    font-family: var(--font-ui);
    font-size: 0.85rem;
    cursor: pointer;
    transition: background-color var(--t-fast) var(--ease-out);
}
.lo-skip:hover { background: rgba(244, 239, 230, 0.12); }

/* Animazione: parte solo con .playing */
.letter-opening-overlay.playing .lo-flap-wrap {
    animation: loFlap 1.4s ease-in-out 0.25s both;
}
.letter-opening-overlay.playing .lo-flap-shape {
    animation: loFlapInside 1.4s linear 0.25s both;
}
.letter-opening-overlay.playing .lo-seal {
    animation: loSealAway 0.18s ease 0.9s both;
}
.letter-opening-overlay.playing .lo-letter {
    animation: loLetterRise 1.3s cubic-bezier(0.22, 1, 0.36, 1) 1.05s both;
}

@keyframes loFlap {
    0%   { transform: perspective(1100px) rotateX(0deg);   z-index: 5; }
    49%  { z-index: 5; }
    50%  { transform: perspective(1100px) rotateX(-90deg); z-index: 1; }
    100% { transform: perspective(1100px) rotateX(-178deg); z-index: 1; }
}
@keyframes loFlapInside {
    0%, 49.9% { background: linear-gradient(160deg, var(--envelope-flap) 0%, var(--envelope-bg) 100%); }
    50%, 100% { background: var(--envelope-inside); }
}
@keyframes loSealAway {
    to { opacity: 0; }
}
@keyframes loLetterRise {
    to { transform: translateY(-330px); }
}

@media (prefers-reduced-motion: reduce) {
    .letter-opening-overlay { display: none !important; }
}

/* ==================== CUSTOM SCROLLBAR ==================== */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-color);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-color);
}

/* ==================== RESPONSIVE DESIGN ==================== */
@media (max-width: 768px) {
    header {
        flex-direction: column;
        gap: 1.5rem;
        padding: 2rem 1.25rem 1.25rem;
        text-align: center;
    }

    .controls-section {
        flex-direction: column;
        width: 100%;
        gap: 1rem;
    }

    .user-meta-header {
        width: 100%;
        justify-content: center;
    }

    main {
        padding: 1.5rem 1.25rem;
    }

    .home-title-bar {
        flex-direction: column;
        gap: 1.2rem;
        align-items: stretch;
    }

    /* Le azioni della home a tutta larghezza, comode da toccare */
    .home-actions-bar {
        flex-direction: column;
        width: 100%;
    }

    .home-actions-bar .btn {
        width: 100%;
        justify-content: center;
    }

    .btn-poetic-start {
        width: 100%;
    }

    .corr-header {
        flex-direction: column-reverse;
        gap: 1.2rem;
        align-items: flex-start;
    }

    .corr-partner-info {
        text-align: left;
    }

    /* ---- Barre di navigazione: scorrimento orizzontale controllato.
       Gestisce qualunque numero di voci (4+) senza sovrapposizioni. ---- */
    .main-nav-container {
        padding: 0 1.25rem;
    }

    .main-nav,
    .corr-tabs {
        display: flex;
        flex-wrap: nowrap;
        gap: 0.25rem;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;          /* Firefox */
    }
    .main-nav::-webkit-scrollbar,
    .corr-tabs::-webkit-scrollbar { display: none; }  /* WebKit */

    .nav-btn,
    .corr-tab-btn {
        flex: 0 0 auto;        /* larghezza sul contenuto, niente schiacciamento */
        justify-content: center;
        text-align: center;
        white-space: nowrap;   /* niente testo a capo / sovrapposizioni */
        min-width: 0;
        top: 0;                /* niente offset che sfasa l'allineamento */
        padding: 0.55rem 0.85rem;
        gap: 0.35rem;
        line-height: 1.2;
    }

    .nav-btn {
        font-size: 0.85rem;
    }

    .corr-tab-btn {
        font-size: 0.9rem;
    }

    .writing-container {
        padding: 2rem 1.25rem;
    }

    .writing-container::before {
        display: none;
    }

    .writer-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }

    .writer-header h2 {
        font-size: 1.5rem;
    }

    .input-title {
        font-size: 1.6rem;
    }

    .category-selector {
        flex-wrap: wrap;
    }

    .modal-content {
        padding: 2.25rem 1.5rem;
    }

    .letter-full-title {
        font-size: 1.8rem;
    }

    .letter-full-body {
        font-size: 1.15rem;
    }

    .reading-actions {
        flex-direction: column;
        gap: 1rem;
        width: 100%;
    }

    .reading-actions-right {
        flex-direction: column;
        width: 100%;
        gap: 0.75rem;
    }

    .reading-actions .btn {
        width: 100%;
    }
}

/* ==================== SMARTPHONE STRETTI (<= 480px) ==================== */
@media (max-width: 480px) {
    .onboarding-overlay {
        padding: 1rem;
        align-items: flex-start;   /* card ancorata in alto: niente taglio se è alta */
    }

    .onboarding-card {
        padding: 2.25rem 1.5rem;
    }

    .poetic-welcome-title {
        font-size: 2.4rem;
    }

    .poetic-quote {
        font-size: 1.15rem;
        margin-bottom: 2.5rem;
    }

    .onboarding-title {
        font-size: 1.7rem;
    }

    main {
        padding: 1.25rem 1rem;
    }

    .writing-container {
        padding: 1.75rem 1.1rem;
    }

    .modal-content {
        padding: 2rem 1.25rem;
    }

    .nav-btn {
        font-size: 0.76rem;
        padding: 0.5rem 0.25rem;
    }

    .corr-tab-btn {
        font-size: 0.82rem;
    }

    .input-title {
        font-size: 1.4rem;
    }

    .letter-full-title {
        font-size: 1.6rem;
    }

    /* Il link di reclamo non deve mai spingere oltre il bordo */
    #sospesa-claim-link {
        max-width: 70%;
    }
}

/* ==================== MAIN NAVIGATION BAR (BOOKMARKS) ==================== */
.main-nav-container {
    max-width: 1000px;
    margin: 1.5rem auto 0;
    padding: 0 1.5rem;
}

.main-nav {
    display: flex;
    justify-content: flex-start;
    gap: 0.5rem;
    border-bottom: 1px solid var(--border-color);
}

.nav-btn {
    background: transparent;
    border: 1px solid transparent;
    border-bottom: none;
    font-family: var(--font-display);
    font-size: 1.1rem;
    color: var(--text-muted);
    padding: 0.6rem 1.4rem;
    cursor: pointer;
    border-radius: 6px 6px 0 0;
    transition: all 0.25s ease;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    position: relative;
    top: 1px;
    z-index: 1;
}

.nav-btn:hover {
    color: var(--text-primary);
    background-color: var(--paper-color-soft);
}

.nav-btn.active {
    color: var(--accent-color);
    background-color: var(--paper-color);
    border-color: var(--border-color);
    border-bottom: 1px solid var(--paper-color);
    font-weight: 500;
}

/* ==================== PENDING LETTERS (LETTERE ALLA SOGLIA) ==================== */
.pending-threshold-card {
    border: 1px dashed var(--border-color) !important;
    background-color: transparent !important;
    box-shadow: none !important;
}

.pending-threshold-card:hover {
    border-color: var(--accent-color) !important;
    background-color: var(--paper-color) !important;
    box-shadow: var(--shadow-soft) !important;
}

/* ==================== MOCK EMAIL NOTIFICATION TOAST ==================== */
.mock-mail-toast {
    animation: slideInToast 0.4s cubic-bezier(0.165, 0.84, 0.44, 1) forwards;
}

@keyframes slideInToast {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ==================== SETTINGS MODAL INTERFACES ==================== */
.settings-section {
    text-align: left;
}

.settings-email-actions {
    margin-top: 1rem;
}