/* ================================================================
   محرّك المتشابهات القرآنية — Design System
   ================================================================ */

:root {
    /* Color Palette */
    --clr-bg:           hsl(220, 13%, 8%);
    --clr-surface:      hsl(220, 13%, 11%);
    --clr-surface-2:    hsl(220, 13%, 14%);
    --clr-border:       hsl(220, 13%, 20%);
    --clr-border-light: hsl(220, 13%, 26%);

    --clr-text:         hsl(210, 22%, 88%);
    --clr-text-muted:   hsl(215, 14%, 52%);
    --clr-text-dim:     hsl(215, 14%, 38%);

    --clr-gold:         hsl(43, 74%, 66%);
    --clr-gold-dim:     hsla(43, 74%, 66%, 0.15);
    --clr-gold-border:  hsla(43, 74%, 66%, 0.35);

    --clr-emerald:      hsl(142, 60%, 45%);
    --clr-emerald-dim:  hsla(142, 60%, 45%, 0.15);

    --clr-blue:         hsl(212, 92%, 68%);
    --clr-blue-dim:     hsla(212, 92%, 68%, 0.15);

    --clr-red:          hsl(4, 86%, 60%);
    --clr-red-dim:      hsla(4, 86%, 60%, 0.15);

    --clr-orange:       hsl(28, 90%, 62%);
    --clr-orange-dim:   hsla(28, 90%, 62%, 0.15);

    /* Typography */
    --font-ui:    'IBM Plex Sans Arabic', 'Segoe UI', system-ui, sans-serif;
    --font-quran: 'Amiri', 'Scheherazade New', serif;

    /* Radii & Shadows */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 20px;

    --shadow-sm: 0 1px 3px rgba(0,0,0,0.4);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.5);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.6);
}

/* ----------------------------------------------------------------
   Reset & Base
---------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
    background: var(--clr-bg);
    color: var(--clr-text);
    font-family: var(--font-ui);
    font-size: 15px;
    line-height: 1.65;
    direction: rtl;
    text-align: right;
    -webkit-font-smoothing: antialiased;
}

/* ----------------------------------------------------------------
   App Shell
---------------------------------------------------------------- */
.app-shell {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 20px 60px;
}

/* ----------------------------------------------------------------
   Header
---------------------------------------------------------------- */
.app-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--clr-border);
    margin-bottom: 28px;
    flex-wrap: wrap;
}

.header-brand {
    display: flex;
    align-items: center;
    gap: 14px;
}

.logo-mark {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    background: var(--clr-gold-dim);
    border: 1px solid var(--clr-gold-border);
    border-radius: var(--radius-md);
    color: var(--clr-gold);
    flex-shrink: 0;
}

.brand-text h1 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--clr-text);
    letter-spacing: -0.01em;
}

.brand-text p {
    font-size: 0.82rem;
    color: var(--clr-text-muted);
    margin-top: 2px;
}

/* ----------------------------------------------------------------
   Tab Navigation
---------------------------------------------------------------- */
.tab-nav {
    display: flex;
    gap: 6px;
    background: var(--clr-surface);
    border: 1px solid var(--clr-border);
    padding: 5px;
    border-radius: var(--radius-lg);
}

.tab-btn {
    background: transparent;
    color: var(--clr-text-muted);
    border: none;
    padding: 9px 18px;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-family: var(--font-ui);
    font-size: 0.9rem;
    font-weight: 500;
    transition: background 0.18s, color 0.18s;
    white-space: nowrap;
}

.tab-btn:hover { color: var(--clr-text); }

.tab-btn.active {
    background: var(--clr-surface-2);
    color: var(--clr-gold);
    font-weight: 600;
    box-shadow: var(--shadow-sm);
}

/* ----------------------------------------------------------------
   Tab Panes
---------------------------------------------------------------- */
.tab-pane { display: none; }
.tab-pane.active { display: block; }

/* ----------------------------------------------------------------
   Filter Bar
---------------------------------------------------------------- */
.filter-bar {
    background: var(--clr-surface);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius-lg);
    padding: 18px 20px;
    margin-bottom: 24px;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

/* Search */
.search-wrap {
    position: relative;
    display: flex;
    align-items: center;
}

.search-icon-inner {
    position: absolute;
    right: 14px;
    font-size: 1rem;
    color: var(--clr-text-muted);
    pointer-events: none;
}

#search-input {
    width: 100%;
    background: var(--clr-bg);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius-md);
    padding: 12px 44px 12px 44px;
    color: var(--clr-text);
    font-size: 1rem;
    font-family: var(--font-ui);
    outline: none;
    transition: border-color 0.2s;
}

#search-input:focus {
    border-color: var(--clr-gold-border);
    box-shadow: 0 0 0 3px var(--clr-gold-dim);
}

#search-input::placeholder { color: var(--clr-text-dim); }

.clear-btn {
    position: absolute;
    left: 12px;
    background: none;
    border: none;
    color: var(--clr-text-dim);
    font-size: 1rem;
    cursor: pointer;
    padding: 4px 6px;
    border-radius: 4px;
    transition: color 0.15s;
}

.clear-btn:hover { color: var(--clr-text); }

/* Filter Row */
.filter-row {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
}

.filter-group {
    display: flex;
    align-items: center;
    gap: 8px;
    flex: 1;
    min-width: 200px;
}

.filter-group label {
    font-size: 0.83rem;
    color: var(--clr-text-muted);
    white-space: nowrap;
    font-weight: 500;
}

.filter-group select {
    flex: 1;
    background: var(--clr-bg);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius-sm);
    color: var(--clr-text);
    padding: 8px 10px;
    font-family: var(--font-ui);
    font-size: 0.9rem;
    outline: none;
    cursor: pointer;
}

.results-chip {
    font-size: 0.83rem;
    color: var(--clr-text-muted);
    background: var(--clr-surface-2);
    border: 1px solid var(--clr-border);
    padding: 6px 12px;
    border-radius: 20px;
    white-space: nowrap;
    margin-right: auto;
}

/* ----------------------------------------------------------------
   Cards Grid
---------------------------------------------------------------- */
.cards-grid {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.loading-state {
    text-align: center;
    color: var(--clr-text-muted);
    padding: 60px 20px;
    font-size: 1rem;
}

/* ----------------------------------------------------------------
   Ayah Card
---------------------------------------------------------------- */
.ayah-card {
    background: var(--clr-surface);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius-lg);
    padding: 22px 24px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.ayah-card:hover {
    border-color: var(--clr-border-light);
    box-shadow: var(--shadow-md);
}

/* Card Header */
.ayah-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
}

.ayah-location {
    display: flex;
    align-items: center;
    gap: 8px;
}

.surah-name {
    font-size: 1rem;
    font-weight: 700;
    color: var(--clr-text);
}

.ayah-num-badge {
    background: var(--clr-blue-dim);
    color: var(--clr-blue);
    font-size: 0.78rem;
    font-weight: 600;
    padding: 2px 9px;
    border-radius: 20px;
}

/* Tier Badges */
.tier-badge {
    font-size: 0.76rem;
    font-weight: 700;
    padding: 4px 12px;
    border-radius: 20px;
    white-space: nowrap;
    letter-spacing: 0.01em;
}

.tier-extreme { background: var(--clr-red-dim);     color: var(--clr-red);     }
.tier-high    { background: var(--clr-orange-dim);  color: var(--clr-orange);  }
.tier-medium  { background: var(--clr-gold-dim);    color: var(--clr-gold);    }
.tier-low     { background: var(--clr-blue-dim);    color: var(--clr-blue);    }
.tier-verylow { background: var(--clr-emerald-dim); color: var(--clr-emerald); }

/* Quranic Text */
.quran-text {
    font-family: var(--font-quran);
    font-size: 1.75rem;
    line-height: 2.1;
    color: hsl(40, 60%, 96%);
    text-align: right;
    padding: 14px 18px;
    background: var(--clr-surface-2);
    border-radius: var(--radius-md);
    border-right: 3px solid var(--clr-gold);
    word-spacing: 3px;
}

/* Metrics Row */
.metrics-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.metric-pill {
    display: flex;
    flex-direction: column;
    gap: 1px;
    background: var(--clr-surface-2);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius-sm);
    padding: 7px 12px;
    flex: 1;
    min-width: 110px;
}

.metric-label {
    font-size: 0.73rem;
    color: var(--clr-text-dim);
    font-weight: 500;
}

.metric-val {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--clr-text);
}

.metric-val.gold { color: var(--clr-gold); }

/* ----------------------------------------------------------------
   Competitors Accordion
---------------------------------------------------------------- */
.competitors-wrapper { margin-top: 4px; }

.toggle-competitors-btn {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--clr-surface-2);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius-md);
    padding: 11px 16px;
    color: var(--clr-text-muted);
    font-family: var(--font-ui);
    font-size: 0.88rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
}

.toggle-competitors-btn:hover {
    background: var(--clr-border);
    color: var(--clr-text);
}

.arrow-icon {
    font-size: 1rem;
    transition: transform 0.2s;
}

.competitors-list {
    display: none;
    flex-direction: column;
    gap: 10px;
    margin-top: 10px;
}

.competitors-list.open { display: flex; }

/* Individual Competitor */
.competitor-item {
    background: var(--clr-bg);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius-md);
    padding: 14px 16px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.comp-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    flex-wrap: wrap;
}

.comp-location {
    display: flex;
    align-items: center;
    gap: 8px;
}

.comp-num {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--clr-border);
    color: var(--clr-text-muted);
    font-size: 0.72rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.comp-surah-label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--clr-text-muted);
}

.comp-score-badge {
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--clr-orange);
    background: var(--clr-orange-dim);
    padding: 3px 9px;
    border-radius: 20px;
}

.comp-quran-text {
    font-family: var(--font-quran);
    font-size: 1.4rem;
    line-height: 2;
    color: var(--clr-text);
    padding: 8px 12px;
    background: var(--clr-surface);
    border-radius: var(--radius-sm);
}

.comp-ngrams-row {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    flex-wrap: wrap;
}

.ngrams-label {
    font-size: 0.75rem;
    color: var(--clr-text-dim);
    white-space: nowrap;
    margin-top: 2px;
    flex-shrink: 0;
}

.shared-ngrams {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
}

.ngram-tag {
    background: var(--clr-emerald-dim);
    color: var(--clr-emerald);
    border: 1px solid hsla(142, 60%, 45%, 0.25);
    font-family: var(--font-quran);
    font-size: 0.88rem;
    padding: 2px 9px;
    border-radius: 4px;
}

/* ----------------------------------------------------------------
   Pagination
---------------------------------------------------------------- */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-top: 32px;
}

.pager-btn {
    background: var(--clr-surface);
    border: 1px solid var(--clr-border);
    color: var(--clr-text-muted);
    padding: 9px 20px;
    border-radius: var(--radius-md);
    font-family: var(--font-ui);
    font-size: 0.9rem;
    cursor: pointer;
    transition: background 0.15s, color 0.15s, border-color 0.15s;
}

.pager-btn:hover:not(:disabled) {
    background: var(--clr-surface-2);
    color: var(--clr-text);
    border-color: var(--clr-border-light);
}

.pager-btn:disabled {
    opacity: 0.35;
    cursor: not-allowed;
}

.page-indicator {
    font-size: 0.88rem;
    color: var(--clr-text-muted);
}

/* ----------------------------------------------------------------
   Simulator Tab
---------------------------------------------------------------- */
.sim-panel {
    background: var(--clr-surface);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius-lg);
    padding: 32px;
    display: flex;
    flex-direction: column;
    gap: 28px;
}

.sim-header h2 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 6px;
}

.sim-header p {
    font-size: 0.9rem;
    color: var(--clr-text-muted);
    line-height: 1.7;
}

/* Temperature Control */
.temp-block {
    background: var(--clr-bg);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius-md);
    padding: 20px 22px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.temp-top-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.92rem;
    font-weight: 500;
}

.temp-display strong {
    font-size: 1.4rem;
    color: var(--clr-gold);
    font-weight: 700;
}

input[type=range] {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 5px;
    border-radius: 4px;
    background: var(--clr-border);
    outline: none;
    cursor: pointer;
}

input[type=range]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--clr-gold);
    box-shadow: 0 2px 8px rgba(0,0,0,0.4);
    cursor: pointer;
    transition: transform 0.15s;
}

input[type=range]::-webkit-slider-thumb:hover { transform: scale(1.15); }

.temp-scale {
    display: flex;
    justify-content: space-between;
    font-size: 0.76rem;
    color: var(--clr-text-dim);
}

.temp-hint-text {
    color: var(--clr-gold);
    font-weight: 600;
}

/* Draw Button */
.sim-action-row { display: flex; justify-content: center; }

.draw-btn {
    display: flex;
    align-items: center;
    gap: 10px;
    background: linear-gradient(135deg, hsl(43, 70%, 50%), hsl(38, 80%, 45%));
    color: hsl(40, 40%, 12%);
    border: none;
    padding: 15px 36px;
    border-radius: var(--radius-xl);
    font-family: var(--font-ui);
    font-size: 1.05rem;
    font-weight: 700;
    cursor: pointer;
    box-shadow: 0 4px 20px hsla(43, 74%, 50%, 0.35);
    transition: transform 0.15s, box-shadow 0.15s;
}

.draw-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 28px hsla(43, 74%, 50%, 0.5);
}

.draw-btn:active { transform: translateY(0); }

.draw-icon {
    font-size: 1.3rem;
    animation: spin 3s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* Sampled Result */
.sampled-wrap {
    border: 2px dashed var(--clr-gold-border);
    border-radius: var(--radius-lg);
    padding: 28px 24px 24px;
    position: relative;
    background: var(--clr-gold-dim);
}

.sampled-wrap.hidden { display: none; }

.sampled-label {
    position: absolute;
    top: -12px;
    right: 20px;
    background: var(--clr-gold);
    color: hsl(40, 40%, 12%);
    font-size: 0.8rem;
    font-weight: 700;
    padding: 2px 12px;
    border-radius: 12px;
}

@keyframes popIn {
    from { opacity: 0; transform: scale(0.96) translateY(8px); }
    to   { opacity: 1; transform: scale(1) translateY(0); }
}

.pop-in { animation: popIn 0.3s ease-out both; }

/* Sampled card nested inside simulator gets slightly tighter */
.sampled-wrap .ayah-card {
    background: var(--clr-surface);
    border-color: var(--clr-gold-border);
}

/* ----------------------------------------------------------------
   Leaderboard Tab
---------------------------------------------------------------- */
.lb-panel {
    background: var(--clr-surface);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius-lg);
    padding: 28px 30px;
}

.lb-header h2 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 6px;
}

.lb-header p {
    font-size: 0.88rem;
    color: var(--clr-text-muted);
    margin-bottom: 20px;
}

.table-scroll { overflow-x: auto; }

.lb-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.88rem;
}

.lb-table th {
    padding: 10px 14px;
    text-align: right;
    background: var(--clr-surface-2);
    color: var(--clr-text-muted);
    font-weight: 600;
    border-bottom: 1px solid var(--clr-border);
    white-space: nowrap;
}

.lb-table td {
    padding: 10px 14px;
    text-align: right;
    border-bottom: 1px solid var(--clr-border);
    vertical-align: middle;
}

.lb-table tr:hover td { background: rgba(255,255,255,0.02); }

.surah-cell { font-weight: 600; }

.lb-best-ayah {
    font-family: var(--font-quran);
    font-size: 1.05rem;
    color: var(--clr-text-muted);
    display: block;
}

.lb-ayah-id {
    font-size: 0.75rem;
    color: var(--clr-text-dim);
}

/* ----------------------------------------------------------------
   Footer
---------------------------------------------------------------- */
.app-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    color: var(--clr-text-dim);
    font-size: 0.78rem;
    margin-top: 48px;
    padding-top: 20px;
    border-top: 1px solid var(--clr-border);
}

.footer-github-link {
    color: var(--clr-text-dim) !important;
    text-decoration: none;
    font-family: monospace;
    font-size: 0.75rem;
    letter-spacing: 0.03em;
    transition: color 0.2s ease;
}

.footer-github-link:hover {
    color: var(--clr-text-main);
}

/* ----------------------------------------------------------------
   Responsive
---------------------------------------------------------------- */
@media (max-width: 720px) {
    .app-header {
        flex-direction: column;
        align-items: flex-start;
    }
    .tab-nav { flex-wrap: wrap; }
    .filter-row { flex-direction: column; align-items: stretch; }
    .results-chip { margin-right: 0; width: 100%; text-align: center; }
    .quran-text { font-size: 1.45rem; }
    .sim-panel { padding: 20px; }
    .draw-btn { width: 100%; justify-content: center; }
}