/* ===== Letheca Design System ===== */

/* ===== Accessibility ===== */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

:root {
    --bg-color: #0a0a0f;
    --bg-surface: rgba(255, 255, 255, 0.04);
    --bg-card: rgba(255, 255, 255, 0.06);
    --bg-card-hover: rgba(255, 255, 255, 0.10);
    --text-color: #e8e6e0;
    --text-muted: #787070;
    --accent: #d4654a;
    --accent-glow: rgba(212, 101, 74, 0.35);
    --accent-gradient: linear-gradient(135deg, #d4654a, #e8956a);
    --border-subtle: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(255, 255, 255, 0.15);
    --glass-blur: 16px;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-display: 'Playfair Display', Georgia, serif;
    --radius: 12px;
    --radius-sm: 8px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== Ambient Background ===== */
body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-body);
    font-weight: 300;
    margin: 0;
    padding: 0;
    line-height: 1.7;
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
}

body::before {
    content: '';
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background:
        radial-gradient(ellipse 80% 60% at 20% 30%, rgba(100, 40, 80, 0.12), transparent),
        radial-gradient(ellipse 60% 50% at 80% 70%, rgba(40, 50, 100, 0.10), transparent),
        radial-gradient(ellipse 50% 40% at 50% 50%, rgba(212, 101, 74, 0.05), transparent);
    animation: ambientShift 30s ease-in-out infinite alternate;
    pointer-events: none;
    z-index: 0;
}

@keyframes ambientShift {
    0% { opacity: 0.8; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.05); }
    100% { opacity: 0.7; transform: scale(0.98); }
}

/* ===== Sticky Glass Header ===== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    text-align: center;
    padding: 1rem 1.5rem;
    background: rgba(10, 10, 15, 0.75);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border-bottom: 1px solid var(--border-subtle);
    transition: background var(--transition);
}

.site-header h1 {
    font-family: var(--font-display);
    margin: 0;
    font-size: 1.8rem;
    font-weight: 400;
    letter-spacing: 0.04em;
}

.site-header a {
    color: var(--text-color);
    text-decoration: none;
}

.site-header nav {
    margin-top: 0.5rem;
}

.site-header nav a {
    margin: 0 1rem;
    color: var(--text-muted);
    font-size: 0.85rem;
    font-weight: 400;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    transition: color var(--transition);
}

.site-header nav a:hover,
.site-header nav a.active {
    color: var(--accent);
}

/* ===== Main Content ===== */
main {
    position: relative;
    z-index: 1;
    max-width: 1200px;
    width: 92%;
    margin: 0 auto;
    padding: 2rem 0;
}

/* ===== Footer ===== */
footer {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: 4rem 1rem 2rem;
    color: var(--text-muted);
    font-family: var(--font-display);
    font-style: italic;
    font-size: 0.95rem;
}

.footer-nav {
    margin-top: 0.75rem;
}

.footer-nav a {
    margin: 0 0.75rem;
    color: var(--text-muted);
    font-family: var(--font-body);
    font-size: 0.8rem;
    font-style: normal;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    transition: color var(--transition);
}

.footer-nav a:hover {
    color: var(--accent);
}

/* ===== Links ===== */
a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: #e8956a; }

/* ===== Compose Area ===== */
.submit-container {
    position: relative;
    z-index: 1;
    margin-bottom: 2.5rem;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius);
    padding: 1.5rem;
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    transition: border-color var(--transition), box-shadow var(--transition);
}

.submit-container:focus-within {
    border-color: var(--accent);
    box-shadow: 0 0 30px var(--accent-glow), inset 0 0 20px rgba(212, 101, 74, 0.03);
}

textarea#post-body {
    width: 100%;
    height: 100px;
    background: transparent;
    border: none;
    color: var(--text-color);
    font-family: var(--font-body);
    font-weight: 300;
    font-size: 0.95rem;
    padding: 0;
    box-sizing: border-box;
    resize: none;
    outline: none;
    line-height: 1.7;
}

textarea#post-body::placeholder {
    color: var(--text-muted);
    font-style: italic;
    font-family: var(--font-display);
}

.submit-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 0.75rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--border-subtle);
}

.char-count {
    color: var(--text-muted);
    font-size: 0.8rem;
    font-weight: 400;
}

/* ===== Buttons ===== */
button {
    background: transparent;
    color: var(--text-color);
    border: 1px solid var(--border-subtle);
    padding: 0.5rem 1.5rem;
    font-family: var(--font-body);
    font-size: 0.85rem;
    font-weight: 400;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    cursor: pointer;
    border-radius: 50px;
    transition: all var(--transition);
}

button:hover:not(:disabled) {
    border-color: var(--accent);
    color: var(--accent);
    box-shadow: 0 0 20px var(--accent-glow);
}

button:disabled {
    color: var(--text-muted);
    cursor: not-allowed;
    opacity: 0.5;
}

/* ===== Card Grid Feed ===== */
.feed {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.25rem;
}

.feed .loading {
    grid-column: 1 / -1;
    text-align: center;
    color: var(--text-muted);
    font-family: var(--font-display);
    font-style: italic;
    padding: 3rem;
}

/* ===== Post Cards ===== */
.post-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius);
    padding: 1.5rem;
    cursor: pointer;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    transition:
        transform var(--transition),
        border-color var(--transition),
        box-shadow var(--transition),
        background var(--transition),
        opacity 1s ease;

    /* Scroll animation — starts hidden */
    opacity: 0;
    transform: translateY(40px);
}

.post-card.visible {
    opacity: var(--card-opacity, 1);
    transform: translateY(0);
}

.post-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3), 0 0 15px var(--accent-glow);
}

.post-card.visible:hover {
    opacity: 1;
}

.post-preview {
    font-size: 0.95rem;
    line-height: 1.7;
    color: var(--text-color);
    margin-bottom: 1.25rem;
    display: -webkit-box;
    -webkit-line-clamp: 4;
    line-clamp: 4;
    -webkit-box-orient: vertical;
    overflow: hidden;
    word-break: break-word;
}

.post-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 0.8rem;
}

/* ===== Echo Button ===== */
.echo-btn {
    border: 1px solid transparent;
    padding: 0.3rem 0.75rem;
    border-radius: 50px;
    color: var(--accent);
    cursor: pointer;
    transition: all var(--transition);
    font-size: 0.8rem;
    text-transform: none;
    letter-spacing: normal;
}

.echo-label {
    color: var(--text-muted);
    font-size: 0.8em;
    margin-left: 0.15rem;
    transition: color var(--transition);
}

.echo-btn:hover {
    border-color: var(--accent);
    box-shadow: 0 0 12px var(--accent-glow);
}

.echo-btn:hover .echo-label {
    color: var(--accent);
}

.echo-btn.echoed {
    opacity: 0.4;
    cursor: default;
    border-color: transparent;
    box-shadow: none;
}

@keyframes echoGlow {
    0% { box-shadow: 0 0 0 rgba(212, 101, 74, 0); }
    50% { box-shadow: 0 0 20px var(--accent-glow); }
    100% { box-shadow: 0 0 0 rgba(212, 101, 74, 0); }
}

.echo-btn.just-echoed {
    animation: echoGlow 0.8s ease-out;
}

.trace-badge {
    color: var(--accent);
    font-style: italic;
    font-family: var(--font-display);
    font-size: 0.8rem;
}

.post-link {
    color: var(--text-muted);
    font-size: 0.8rem;
    transition: color var(--transition);
}

.post-link:hover {
    color: var(--accent);
}

/* ===== Time Decay Indicator ===== */
.decay-bar {
    height: 2px;
    border-radius: 1px;
    background: var(--accent-gradient);
    margin-top: 1rem;
    transition: width 1s ease;
}

/* ===== Single Post View ===== */
.single-post-wrapper {
    max-width: 640px;
    margin: 2rem auto;
}

.single-post {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius);
    padding: 2rem;
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
}

.single-post .post-content {
    white-space: pre-wrap;
    word-break: break-word;
    margin-bottom: 1.5rem;
    font-size: 1.05rem;
    line-height: 1.8;
}

.single-post .post-meta {
    padding-top: 1rem;
    border-top: 1px solid var(--border-subtle);
}

.ttl-warning {
    margin-top: 1.5rem;
    padding: 0.75rem 1rem;
    background: rgba(212, 101, 74, 0.08);
    border-radius: var(--radius-sm);
    border: 1px solid rgba(212, 101, 74, 0.15);
    color: var(--text-muted);
    font-size: 0.85rem;
    text-align: center;
}

.ttl-warning span {
    color: var(--accent);
    font-weight: 500;
}

/* ===== Archive ===== */
.archive-header {
    margin-bottom: 2.5rem;
    text-align: center;
}

.archive-header h2 {
    font-family: var(--font-display);
    font-weight: 400;
    font-size: 1.8rem;
}

.archive-header p {
    color: var(--text-muted);
    font-style: italic;
    font-family: var(--font-display);
}

.traces-feed {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.25rem;
}

.trace {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius);
    padding: 1.5rem;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    transition: all var(--transition);
    opacity: 0;
    transform: translateY(30px);
}

.trace.visible {
    opacity: 1;
    transform: translateY(0);
}

.trace:hover {
    border-color: var(--border-hover);
    background: var(--bg-card-hover);
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
}

.trace-text {
    font-family: var(--font-display);
    font-style: italic;
    font-size: 1.1rem;
    margin-bottom: 0.75rem;
    color: #fdfdf5;
    line-height: 1.6;
}

.trace-meta {
    font-size: 0.8rem;
    color: var(--text-muted);
    display: flex;
    justify-content: space-between;
    padding-top: 0.75rem;
    border-top: 1px solid var(--border-subtle);
}

/* ===== Pagination ===== */
.pagination {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-top: 2.5rem;
}

.pagination a {
    padding: 0.5rem 1.5rem;
    border: 1px solid var(--border-subtle);
    border-radius: 50px;
    font-size: 0.85rem;
    letter-spacing: 0.04em;
    transition: all var(--transition);
}

.pagination a:hover {
    border-color: var(--accent);
    box-shadow: 0 0 15px var(--accent-glow);
    text-decoration: none;
}

/* ===== About Page ===== */
.about-content {
    max-width: 640px;
    margin: 0 auto;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius);
    padding: 2.5rem;
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
}

.about-content h2 {
    font-family: var(--font-display);
    font-weight: 400;
    font-size: 1.6rem;
    margin-top: 0;
}

.about-content h3 {
    color: var(--accent);
    font-size: 1rem;
    margin-top: 2rem;
    font-weight: 500;
}

.about-content p {
    color: var(--text-muted);
    line-height: 1.8;
}

/* ===== Admin Dashboard ===== */
.admin-panel {
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius);
    padding: 2rem;
    background: var(--bg-card);
}

.admin-nav a {
    margin-right: 1rem;
    color: var(--text-muted);
}

.admin-nav a.active {
    color: var(--text-color);
}

table.admin-table {
    width: 100%;
    margin-top: 1rem;
    border-collapse: collapse;
}

table.admin-table th,
table.admin-table td {
    border: 1px solid var(--border-subtle);
    padding: 0.75rem;
    text-align: left;
    font-size: 0.9rem;
}

table.admin-table th {
    background: var(--bg-surface);
}

/* ===== Age Gate ===== */
.age-gate {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
}

.age-gate-overlay {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.age-gate-dialog {
    position: relative;
    z-index: 1;
    max-width: 420px;
    padding: 2.5rem;
    text-align: center;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius);
    background: rgba(15, 15, 20, 0.9);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.age-gate-dialog h2 {
    font-family: var(--font-display);
    font-weight: 400;
    margin: 0 0 1.5rem;
    font-size: 1.5rem;
}

.age-gate-dialog p {
    margin-bottom: 1rem;
    line-height: 1.7;
    color: var(--text-muted);
}

.age-gate-subtext {
    color: var(--text-muted);
    font-size: 0.9rem;
    font-style: italic;
    font-family: var(--font-display);
}

#age-gate-accept {
    margin-top: 1.5rem;
    padding: 0.75rem 2.5rem;
    border-color: var(--accent);
    color: var(--accent);
    font-size: 0.9rem;
    letter-spacing: 0.06em;
}

#age-gate-accept:hover {
    background: var(--accent);
    color: var(--bg-color);
    box-shadow: 0 0 30px var(--accent-glow);
}

body.blurred > header,
body.blurred > main,
body.blurred > footer {
    filter: blur(10px);
    pointer-events: none;
    user-select: none;
}

/* ===== Legal Pages ===== */
.legal-content {
    max-width: 720px;
    margin: 0 auto;
    line-height: 1.8;
}

.legal-content h2 {
    font-family: var(--font-display);
    font-weight: 400;
}

.legal-content h3 {
    margin-top: 2rem;
    font-size: 1rem;
    color: var(--accent);
    font-weight: 500;
}

.legal-content p {
    margin-bottom: 1rem;
    color: var(--text-muted);
}

.legal-content ul {
    padding-left: 1.5rem;
    margin-bottom: 1rem;
}

.legal-content li {
    margin-bottom: 0.5rem;
    color: var(--text-muted);
}

.legal-updated {
    color: var(--text-muted);
    font-size: 0.9rem;
    font-style: italic;
}

/* ===== Animations ===== */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ===== Empty State ===== */
.empty-state {
    grid-column: 1 / -1;
    text-align: center;
    color: var(--text-muted);
    font-family: var(--font-display);
    font-style: italic;
    padding: 4rem 2rem;
    font-size: 1.1rem;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .site-header h1 { font-size: 1.5rem; }
    .site-header nav a { margin: 0 0.6rem; font-size: 0.8rem; }

    main {
        width: 94%;
        padding: 1.5rem 0;
    }

    .feed {
        grid-template-columns: 1fr;
    }

    .traces-feed {
        grid-template-columns: 1fr;
    }

    .submit-container {
        padding: 1rem;
    }

    .post-card {
        padding: 1.25rem;
    }
}

@media (min-width: 769px) and (max-width: 1024px) {
    .feed {
        grid-template-columns: repeat(2, 1fr);
    }

    .traces-feed {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ===== Noise Grain Overlay ===== */
body::after {
    content: '';
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.03'/%3E%3C/svg%3E");
    pointer-events: none;
    z-index: 0;
    opacity: 0.5;
}