/* ====================================================
   Lịch Thi Sinh Viên – Dark Theme (giống ảnh mẫu)
   ==================================================== */

:root {
    --bg-dark:    #0d1117;
    --bg-card:    #161b22;
    --bg-input:   #1c2431;
    --border:     #30363d;
    --accent:     #2f81f7;
    --accent-glow:#388bfd33;
    --text-main:  #e6edf3;
    --text-muted: #8b949e;
    --text-sub:   #58a6ff;
    --success:    #3fb950;
    --warning:    #d29922;
    --btn-bg:     #238636;
    --btn-hover:  #2ea043;
    --radius:     10px;
}

/* Wrapper */
.ltsv-wrap {
    background: var(--bg-dark);
    border: 1px solid var(--border);
    border-radius: 14px;
    overflow: hidden;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--text-main);
    max-width: 1100px;
    margin: 0 auto;
}

/* ── Header ───────────────────────────────────────── */
.ltsv-header {
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    padding: 18px 28px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
}
.ltsv-logo {
    display: flex;
    align-items: center;
    gap: 14px;
}
.ltsv-logo-icon {
    font-size: 32px;
    background: var(--bg-input);
    width: 52px; height: 52px;
    border-radius: 12px;
    border: 1px solid var(--border);
    display: flex; align-items: center; justify-content: center;
    line-height: 1;
}
.ltsv-logo-sub   { font-size: 10px; letter-spacing: 2px; color: var(--text-sub); text-transform: uppercase; }
.ltsv-logo-title { font-size: 20px; font-weight: 700; letter-spacing: 1px; color: var(--text-main); }
.ltsv-status {
    font-size: 13px;
    color: var(--text-muted);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 6px 16px;
    display: flex; align-items: center; gap: 8px;
}
.ltsv-dot {
    width: 8px; height: 8px;
    background: var(--success);
    border-radius: 50%;
    display: inline-block;
    box-shadow: 0 0 6px var(--success);
}

/* ── Body layout ──────────────────────────────────── */
.ltsv-body {
    display: grid;
    grid-template-columns: 1fr 280px;
    gap: 0;
    min-height: 380px;
}
.ltsv-main {
    padding: 28px;
    border-right: 1px solid var(--border);
}

/* Section title */
.ltsv-section-title {
    font-size: 18px; font-weight: 700;
    color: var(--text-main);
    margin: 0 0 4px;
    letter-spacing: .5px;
}
.ltsv-section-sub {
    font-size: 12px; color: var(--text-muted);
    margin: 0 0 20px;
    text-transform: uppercase; letter-spacing: 1px;
}

/* ── Search box ───────────────────────────────────── */
.ltsv-search-box {
    display: flex;
    gap: 10px;
    margin-bottom: 6px;
}
.ltsv-search-box input {
    flex: 1;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text-main);
    font-size: 15px;
    padding: 13px 18px;
    outline: none;
    transition: border-color .2s, box-shadow .2s;
}
.ltsv-search-box input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}
.ltsv-search-box input::placeholder { color: var(--text-muted); }
.ltsv-search-box button {
    background: var(--btn-bg);
    color: #fff;
    border: none;
    border-radius: var(--radius);
    padding: 13px 24px;
    font-size: 15px; font-weight: 600;
    cursor: pointer;
    transition: background .2s, transform .1s;
    white-space: nowrap;
}
.ltsv-search-box button:hover  { background: var(--btn-hover); }
.ltsv-search-box button:active { transform: scale(.97); }

/* ── Result header ────────────────────────────────── */
.ltsv-result-header {
    display: flex; align-items: center; justify-content: space-between;
    margin: 22px 0 10px;
    font-size: 13px; color: var(--text-muted);
}
.ltsv-btn-clear {
    background: none;
    border: 1px solid var(--border);
    color: var(--text-muted);
    border-radius: 6px;
    padding: 4px 12px;
    font-size: 12px;
    cursor: pointer;
    transition: border-color .2s, color .2s;
}
.ltsv-btn-clear:hover { border-color: #f85149; color: #f85149; }

/* ── Table ────────────────────────────────────────── */
.ltsv-table-wrap { overflow-x: auto; }
.ltsv-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13.5px;
}
.ltsv-table thead tr {
    border-bottom: 1px solid var(--border);
}
.ltsv-table th {
    color: var(--text-muted);
    font-size: 11px; font-weight: 600;
    letter-spacing: 1px;
    padding: 10px 12px;
    text-align: left;
    white-space: nowrap;
    background: var(--bg-card);
}
.ltsv-table th:first-child { border-radius: 8px 0 0 0; }
.ltsv-table th:last-child  { border-radius: 0 8px 0 0; }
.ltsv-table td {
    padding: 11px 12px;
    border-bottom: 1px solid var(--border);
    vertical-align: middle;
    color: var(--text-main);
}
.ltsv-table tbody tr:hover td {
    background: rgba(47,129,247,.06);
}
.ltsv-table tbody tr:last-child td { border-bottom: none; }

/* Badges */
.ltsv-badge {
    display: inline-block;
    font-size: 11px; font-weight: 600;
    padding: 2px 8px;
    border-radius: 20px;
}
.ltsv-badge-room  { background:#1f3a5f; color:var(--text-sub); }
.ltsv-badge-type  { background:#1a3a2a; color:var(--success); }

/* ── Empty / Loading ──────────────────────────────── */
.ltsv-empty, .ltsv-loading {
    text-align: center;
    padding: 48px 20px;
    color: var(--text-muted);
}
.ltsv-empty span { font-size: 40px; display:block; margin-bottom:12px; }
.ltsv-empty p    { line-height: 1.7; font-size: 14px; }
.ltsv-spinner {
    display: inline-block;
    width: 18px; height: 18px;
    border: 2px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: ltsv-spin .7s linear infinite;
    margin-right: 8px;
    vertical-align: middle;
}
@keyframes ltsv-spin { to { transform: rotate(360deg); } }

/* ── Sidebar ──────────────────────────────────────── */
.ltsv-sidebar {
    padding: 28px 22px;
    background: var(--bg-card);
    display: flex; flex-direction: column; gap: 16px;
}
.ltsv-sidebar-card {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 18px;
    background: var(--bg-dark);
}
.ltsv-sidebar-card.ltsv-note { border-color: #3d2b00; }
.ltsv-sidebar-icon { font-size: 20px; margin-bottom: 8px; }
.ltsv-sidebar-card h3 {
    font-size: 13px; font-weight: 700;
    color: var(--text-main);
    margin: 0 0 10px;
    letter-spacing: .5px;
}
.ltsv-sidebar-card ul {
    margin: 0; padding: 0 0 0 16px;
    color: var(--text-muted); font-size: 13px; line-height: 1.8;
}
.ltsv-sidebar-card p  { color: var(--text-muted); font-size: 13px; margin:0; line-height:1.7; }
.ltsv-sidebar-card kbd {
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 1px 6px;
    font-size: 11px;
    font-family: monospace;
}

/* ── Responsive ───────────────────────────────────── */
@media (max-width: 768px) {
    .ltsv-body { grid-template-columns: 1fr; }
    .ltsv-main { border-right: none; border-bottom: 1px solid var(--border); }
    .ltsv-search-box { flex-direction: column; }
    .ltsv-search-box button { width: 100%; }
    .ltsv-logo-title { font-size: 16px; }
}

/* ═══════════════════════════════════════════════════
   MOBILE RESPONSIVE – Chuyển bảng → Card
   ═══════════════════════════════════════════════════ */
@media (max-width: 768px) {
    .ltsv-wrap   { border-radius: 10px; }
    .ltsv-header { padding: 14px 16px; }
    .ltsv-body   { grid-template-columns: 1fr; }
    .ltsv-main   { padding: 16px; border-right: none; border-bottom: 1px solid var(--border); }
    .ltsv-sidebar{ padding: 16px; }
    .ltsv-logo-title { font-size: 15px; }

    /* Search */
    .ltsv-search-box            { flex-direction: column; }
    .ltsv-search-box input      { font-size: 16px; } /* tránh zoom iOS */
    .ltsv-search-box button     { width: 100%; padding: 14px; font-size: 15px; }

    /* Ẩn bảng desktop */
    .ltsv-table-wrap { display: none !important; }

    /* Card list thay thế */
    .ltsv-mobile-cards {
        display: flex !important;
        flex-direction: column;
        gap: 12px;
        margin-top: 4px;
    }
    .ltsv-m-card {
        background: var(--bg-card);
        border: 1px solid var(--border);
        border-radius: 10px;
        overflow: hidden;
    }
    .ltsv-m-card-header {
        background: var(--bg-input);
        padding: 11px 14px;
        display: flex;
        align-items: flex-start;
        justify-content: space-between;
        gap: 8px;
        border-bottom: 1px solid var(--border);
    }
    .ltsv-m-card-name { font-size: 15px; font-weight: 700; color: var(--text-main); }
    .ltsv-m-card-masv { font-size: 11px; color: var(--text-sub); margin-top: 3px; }
    .ltsv-m-card-body {
        padding: 12px 14px;
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 12px;
    }
    .ltsv-m-field { }
    .ltsv-m-field.full { grid-column: 1 / -1; }
    .ltsv-m-label {
        font-size: 10px; text-transform: uppercase;
        letter-spacing: .8px; color: var(--text-muted); margin-bottom: 3px;
    }
    .ltsv-m-value {
        font-size: 13px; font-weight: 600; color: var(--text-main);
        line-height: 1.4;
    }
    .ltsv-m-card-footer {
        padding: 10px 14px;
        border-top: 1px solid var(--border);
        display: flex; gap: 8px; align-items: center; flex-wrap: wrap;
    }
}

/* Desktop: ẩn mobile cards */
@media (min-width: 769px) {
    .ltsv-mobile-cards { display: none !important; }
}