/* =================================================================
   listening-index.css  —  TCT English Listening Module
   ================================================================= */

:root {
    --li-primary: #4255ff;
    --li-primary-soft: rgba(66, 85, 255, 0.1);
    --li-accent: #06b6d4;
    --li-accent-soft: rgba(6, 182, 212, 0.1);
    --li-surface: #ffffff;
    --li-background: linear-gradient(180deg, #fafbff 0%, #f2f5ff 100%);
    --li-text: #1f2a44;
    --li-text-muted: #667085;
    --li-border: rgba(66, 85, 255, 0.12);
    --li-radius: 1.25rem;
    --li-shadow: 0 12px 34px rgba(31, 42, 68, 0.06);
    --li-shadow-hover: 0 20px 48px rgba(31, 42, 68, 0.12);

    /* Level Colors */
    --lvl-a1: #10b981;
    --lvl-a2: #06b6d4;
    --lvl-b1: #f59e0b;
    --lvl-b2: #ef4444;
    --lvl-c1: #8b5cf6;
}

.listening-index-page {
    position: relative;
    min-height: calc(100vh - 80px);
    padding: 3rem 1.5rem 5rem;
    color: var(--li-text);
    background: var(--li-background);
}

.listening-index-page::before {
    content: "";
    position: absolute;
    inset: 0;
    pointer-events: none;
    background: 
        radial-gradient(circle at top right, rgba(6, 182, 212, 0.08), transparent 25%),
        radial-gradient(circle at bottom left, rgba(66, 85, 255, 0.06), transparent 20%);
}

.li-container {
    position: relative;
    z-index: 1;
    max-width: 1240px;
    margin: 0 auto;
}

/* ── HERO SECTION ─────────────────────────────────────────────── */
.li-hero {
    text-align: center;
    margin-bottom: 3.5rem;
    animation: li-fade-up 0.6s ease-out;
}

.li-hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1.25rem;
    background: var(--li-surface);
    border: 1px solid var(--li-border);
    border-radius: 999px;
    color: var(--li-accent);
    font-size: 0.8rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 1.25rem;
    box-shadow: 0 8px 20px rgba(6, 182, 212, 0.1);
}

.li-hero-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 900;
    color: var(--li-text);
    margin-bottom: 0.75rem;
    letter-spacing: -0.02em;
}

.li-hero-subtitle {
    font-size: 1.1rem;
    color: var(--li-text-muted);
    max-width: 600px;
    margin: 0 auto 2.5rem;
}

/* ── SEARCH BOX ──────────────────────────────────────────────── */
.li-search-container {
    position: relative;
    max-width: 500px;
    margin: 0 auto;
}

.li-search-icon {
    position: absolute;
    left: 1.25rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--li-text-muted);
    pointer-events: none;
}

.li-search-input {
    width: 100%;
    padding: 1rem 1.25rem 1rem 3.25rem;
    border-radius: 999px;
    border: 1.5px solid var(--li-border);
    background: var(--li-surface);
    font-size: 1rem;
    color: var(--li-text);
    box-shadow: var(--li-shadow);
    transition: all 0.3s ease;
}

.li-search-input:focus {
    outline: none;
    border-color: var(--li-primary);
    box-shadow: 0 0 0 4px rgba(66, 85, 255, 0.15);
}

/* ── STATS ROW ───────────────────────────────────────────────── */
.li-stats-row {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    flex-wrap: wrap;
    margin-bottom: 3.5rem;
}

.li-stat-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1.25rem;
    background: var(--li-surface);
    border: 1px solid var(--li-border);
    border-radius: 999px;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--li-text-muted);
}

.li-stat-chip i {
    color: var(--li-primary);
}

/* ── FILTERS ─────────────────────────────────────────────────── */
.li-filters {
    margin-bottom: 3rem;
}

.li-filter-tabs {
    display: flex;
    justify-content: center;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.btn-tab {
    padding: 0.75rem 1.75rem;
    border-radius: 999px;
    border: 1.5px solid var(--li-border);
    background: var(--li-surface);
    color: var(--li-text-muted);
    font-weight: 700;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.25s ease;
}

.btn-tab:hover {
    color: var(--li-primary);
    border-color: var(--li-primary);
}

.btn-tab.active {
    background: var(--li-primary);
    border-color: var(--li-primary);
    color: #fff;
    box-shadow: 0 8px 20px rgba(66, 85, 255, 0.3);
}

.li-topic-pills {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.pill-topic {
    padding: 0.4rem 1rem;
    border-radius: 999px;
    border: 1px solid var(--li-border);
    background: rgba(255, 255, 255, 0.6);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--li-text-muted);
    cursor: pointer;
    transition: all 0.2s ease;
}

.pill-topic:hover, .pill-topic.active {
    background: var(--li-accent);
    border-color: var(--li-accent);
    color: #fff;
}

/* ── LEVEL SECTIONS ──────────────────────────────────────────── */
.li-level-section {
    margin-bottom: 4rem;
    animation: li-fade-up 0.7s ease-out both;
}

.li-level-header {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 2rem;
    padding-bottom: 1.25rem;
    border-bottom: 2px solid var(--li-border);
}

.li-level-icon-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 4rem;
    height: 4rem;
    border-radius: 1.25rem;
    color: #fff;
    font-size: 1.75rem;
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}

.li-level-info h2 {
    font-size: 1.5rem;
    font-weight: 900;
    margin: 0;
}

.li-level-desc {
    color: var(--li-text-muted);
    font-size: 0.95rem;
    margin: 0.25rem 0 0;
}

.li-level-count-badge {
    margin-left: auto;
    padding: 0.4rem 1rem;
    background: var(--li-primary-soft);
    color: var(--li-primary);
    border-radius: 999px;
    font-size: 0.85rem;
    font-weight: 800;
}

/* ── CARD GRID ───────────────────────────────────────────────── */
.li-card-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.li-card {
    display: flex;
    flex-direction: column;
    padding: 1.5rem;
    background: var(--li-surface);
    border: 1px solid var(--li-border);
    border-radius: var(--li-radius);
    text-decoration: none;
    color: inherit;
    box-shadow: var(--li-shadow);
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    height: 100%;
    position: relative;
    overflow: hidden;
}

.li-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--li-shadow-hover);
    border-color: var(--li-primary);
    color: inherit;
}

.li-card-top {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: 1.25rem;
}

.li-card-visual {
    width: 3.5rem;
    height: 3.5rem;
    background: var(--li-accent-soft);
    color: var(--li-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 1rem;
    font-size: 1.5rem;
    transition: all 0.3s ease;
}

.li-card:hover .li-card-visual {
    background: var(--li-accent);
    color: #fff;
    transform: rotate(-5deg) scale(1.1);
}

.li-status-badge {
    padding: 0.35rem 0.75rem;
    border-radius: 999px;
    font-size: 0.7rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.badge-new { background: #eff6ff; color: #3b82f6; }
.badge-progress { background: #fffbeb; color: #d97706; }
.badge-completed { background: #ecfdf5; color: #10b981; }

.li-card-title {
    font-size: 1.2rem;
    font-weight: 800;
    line-height: 1.4;
    margin-bottom: 0.75rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.li-card-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: auto;
}

.li-meta-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.3rem 0.75rem;
    background: #f1f5f9;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--li-text-muted);
}

.tag-topic { background: var(--li-accent-soft); color: var(--li-accent); }

.li-card-footer {
    margin-top: 1.25rem;
    padding-top: 1rem;
    border-top: 1px dashed var(--li-border);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.85rem;
    color: var(--li-text-muted);
}

.li-speaker-info {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.li-speaker-name { font-weight: 700; color: var(--li-text); }

/* ── PAGINATION ──────────────────────────────────────────────── */
.li-pagination {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 2rem;
}

.page-link {
    width: 2.5rem;
    height: 2.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 0.75rem;
    background: var(--li-surface);
    border: 1px solid var(--li-border);
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s ease;
}

.page-link.active {
    background: var(--li-primary);
    color: #fff;
    border-color: var(--li-primary);
}

/* ── EMPTY STATE ─────────────────────────────────────────────── */
.li-empty {
    text-align: center;
    padding: 5rem 2rem;
    background: var(--li-surface);
    border-radius: var(--li-radius);
    border: 2px dashed var(--li-border);
}

.li-empty i {
    font-size: 3.5rem;
    color: var(--li-border);
    margin-bottom: 1.5rem;
    display: block;
}

/* ── ANIMATIONS ──────────────────────────────────────────────── */
@keyframes li-fade-up {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ── RESPONSIVE ──────────────────────────────────────────────── */
@media (max-width: 1024px) {
    .li-card-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
    .li-card-grid { grid-template-columns: 1fr; }
    .li-hero-title { font-size: 2.5rem; }
    .btn-tab { padding: 0.6rem 1.25rem; font-size: 0.85rem; }
    .li-level-header { flex-direction: column; align-items: flex-start; gap: 1rem; }
    .li-level-count-badge { margin-left: 0; }
}