/* ============================================
   TEXT STEGANOGRAPHY INDEX PAGE
   ============================================ */
.index-container {
    max-width: 1180px;
    margin: 48px auto 0;
    padding: 20px;
}

.hero {
    background: linear-gradient(180deg, rgba(27, 27, 39, 0.96), rgba(15, 15, 22, 0.92));
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 32px 28px;
    margin-bottom: 30px;
    text-align: center;
    box-shadow: var(--shadow-card);
}

.hero h1 {
    font-size: clamp(2.2rem, 4vw, 3rem);
    margin: 0 0 12px;
    color: var(--color-primary);
}

.hero .tagline {
    margin: 0;
    font-size: 1.06rem;
    line-height: 1.7;
    color: var(--color-text-muted);
}

.panel {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 26px 22px;
    margin-bottom: 30px;
    box-shadow: var(--shadow-card);
}

.panel h2 {
    color: var(--color-primary);
    margin: 0 0 18px;
    font-size: clamp(1.5rem, 2vw, 1.9rem);
    border-bottom: 1px solid var(--color-border);
    padding-bottom: 10px;
}

.storage-notice,
.storage-status {
    border-left: 3px solid #4aa3ff;
    background: rgba(74, 163, 255, 0.1);
    color: var(--color-text);
    margin: 0 0 18px;
    padding: 12px 14px;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    line-height: 1.6;
}

.storage-status-error {
    border-left-color: #ff6b6b;
    background: rgba(255, 107, 107, 0.1);
    color: #ffd7d7;
}

.corpus-controls {
    display: flex;
    gap: 14px;
    align-items: flex-start;
    margin-bottom: 20px;
}

.corpus-controls > div:first-child {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.corpus-controls input[type="text"],
.corpus-controls textarea,
#queryText,
#baselineText,
#docName,
#docText {
    width: 100%;
    box-sizing: border-box;
    padding: 12px 14px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
    background: rgba(9, 10, 16, 0.7);
    color: var(--color-text);
    font-family: inherit;
}

.corpus-controls textarea,
#baselineText,
#docText {
    min-height: 92px;
    resize: vertical;
}

.corpus-controls input:focus,
.corpus-controls textarea:focus,
#queryText:focus,
#baselineText:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(235, 63, 123, 0.12);
}

.corpus-list {
    display: grid;
    gap: 12px;
}

.corpus-item {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--color-border);
    padding: 12px 14px;
    border-radius: var(--radius-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    transition: border-color 0.2s ease, transform 0.2s ease;
}

.corpus-item:hover {
    background: rgba(255, 255, 255, 0.04);
    border-color: var(--color-primary);
    transform: translateY(-1px);
}

.corpus-item .name {
    font-weight: 600;
}

.corpus-item .meta {
    font-size: 0.78rem;
    color: var(--color-text-muted);
}

.corpus-item button {
    background: transparent;
    border: none;
    color: #ff8d8d;
    cursor: pointer;
    font-size: 1rem;
    padding: 4px 8px;
    margin: 0;
}

.corpus-item button:hover {
    color: #ffb1b1;
}

.tab-content {
    background: rgba(255, 255, 255, 0.02);
    padding: 18px;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
}

.tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 18px;
    flex-wrap: wrap;
    align-items: center;
}

.ranking-item {
    background: rgba(255, 255, 255, 0.03);
    padding: 15px 16px;
    margin-bottom: 12px;
    border-radius: var(--radius-md);
    border-left: 4px solid var(--color-primary);
    cursor: pointer;
    transition: background 0.2s ease, transform 0.2s ease;
}

.ranking-item:hover {
    background: rgba(255, 255, 255, 0.06);
    transform: translateX(3px);
}

.ranking-item strong {
    display: block;
    margin-bottom: 6px;
}

.stat-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--color-border);
    padding: 16px 18px;
    border-radius: var(--radius-md);
    text-align: center;
    min-width: 150px;
    transition: border-color 0.2s ease, transform 0.2s ease;
}

.stat-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-2px);
}

.stat-card .value {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--color-primary);
}

.stat-card .label {
    font-size: 0.72rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--color-text-muted);
}

.corpus-controls-row,
.tab-actions-row,
.stats-row {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.document-detail-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 20px;
}

.document-detail-grid > div {
    min-width: 0;
}

.document-detail-table {
    border-collapse: collapse;
    table-layout: fixed;
    width: 100%;
}

.document-detail-table td {
    overflow-wrap: anywhere;
    padding: 10px 8px;
    border-bottom: 1px solid var(--color-border);
}

.document-preview-section {
    margin-top: 20px;
}

#docDetailModal {
    background: rgba(16, 16, 22, 0.98);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
}

#modalOverlay {
    backdrop-filter: blur(3px);
}

@media (max-width: 700px) {
    .index-container {
        padding: 14px;
    }

    .panel,
    .hero {
        padding-left: 16px;
        padding-right: 16px;
    }

    .corpus-controls {
        flex-direction: column;
    }

    .corpus-controls > div:last-child {
        width: 100%;
        display: flex;
        flex-direction: row;
        flex-wrap: wrap;
    }

    .document-detail-grid {
        grid-template-columns: 1fr;
    }

    .tabs {
        flex-direction: column;
        align-items: stretch;
    }

    .tabs button,
    .tabs a {
        width: 100%;
    }
}