/* ═══════════════════════════════════════════════════════════════════
   Naxi Language Explorer — Shared Theme CSS
   Used by: index.html, validate.html, compare.html
   ═══════════════════════════════════════════════════════════════════ */

/* ── Fonts ── */
@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:wght@300;400;500;600;700&family=IBM+Plex+Mono:wght@400;500&display=swap');

:root {
    --font-sans: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    --font-mono: 'IBM Plex Mono', 'Menlo', monospace;
    --success: #4caf50;
    --warning: #ff9800;
    --error: #f44336;
    --gold: #ffd700;
}

/* ── Theme: Dark ── */
[data-theme="dark"] {
    --bg: #0f1117; --surface: #1a1d2e; --surface2: #252840;
    --accent: #6c63ff; --accent2: #ff6584;
    --text: #e8e8f0; --text-dim: #9a9ab0; --border: #2d2f4a;
    --radius: 0px; --shadow: none;
    --approve-bg: rgba(76,175,80,0.15); --reject-bg: rgba(244,67,54,0.15);
    --correct-bg: rgba(255,152,0,0.15);
}

/* ── Theme: Light ── */
[data-theme="light"] {
    --bg: #fafafa; --surface: #ffffff; --surface2: #f5f5f5;
    --accent: #5046e5; --accent2: #e5468d;
    --text: #212121; --text-dim: #616161; --border: #e0e0e0;
    --radius: 0px; --shadow: none;
    --approve-bg: rgba(76,175,80,0.1); --reject-bg: rgba(244,67,54,0.1);
    --correct-bg: rgba(255,152,0,0.1);
}

/* ── Theme: NASA CRT ── */
[data-theme="nasa"] {
    --bg: #000000; --surface: #000000; --surface2: #0a0a0a;
    --accent: #00ff41; --accent2: #00cc33;
    --text: #00ff41; --text-dim: #006600; --border: #003300;
    --radius: 0px; --shadow: none;
    --approve-bg: rgba(0,255,65,0.1); --reject-bg: rgba(255,0,0,0.1);
    --correct-bg: rgba(255,176,0,0.1);
}

/* ── Theme: Oceans ── */
[data-theme="oceans"] {
    --bg: #001219; --surface: #001e29; --surface2: #00263a;
    --accent: #00b4d8; --accent2: #ee9b00;
    --text: #94d2bd; --text-dim: #5f7d8e; --border: #005f73;
    --radius: 2px; --shadow: 0 2px 10px rgba(0,0,0,0.3);
    --approve-bg: rgba(148,210,189,0.15); --reject-bg: rgba(174,32,18,0.15);
    --correct-bg: rgba(238,155,0,0.15);
}

/* ── Theme: Sepia ── */
[data-theme="sepia"] {
    --bg: #f4ede4; --surface: #fdf8f2; --surface2: #ede3d8;
    --accent: #8b4513; --accent2: #c06020;
    --text: #3b2a1a; --text-dim: #7a6251; --border: #c8b49a;
    --radius: 2px; --shadow: 0 1px 4px rgba(0,0,0,0.08);
    --approve-bg: rgba(76,175,80,0.1); --reject-bg: rgba(244,67,54,0.1);
    --correct-bg: rgba(255,152,0,0.1);
}

/* NASA CRT scanlines */
[data-theme="nasa"] body::before {
    content: ''; position: fixed; inset: 0; z-index: 9999; pointer-events: none;
    background: repeating-linear-gradient(0deg, transparent, transparent 2px, rgba(0,255,65,0.03) 2px, rgba(0,255,65,0.03) 4px);
}

/* ── Reset ── */
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: var(--font-sans); font-size: 13px; line-height: 1.5;
    background: var(--bg); color: var(--text);
    transition: background 0.2s, color 0.2s;
}
[data-theme="nasa"] body { font-family: var(--font-mono); }

/* ═══════════════════════════════════════════════════════════════════
   CROSS-PAGE NAVIGATION
   ═══════════════════════════════════════════════════════════════════ */
.site-nav {
    position: sticky; top: 0; z-index: 100;
    background: var(--surface); border-bottom: 1px solid var(--border);
    height: 44px; display: flex; align-items: center; padding: 0 16px;
}
.site-nav .logo {
    display: flex; align-items: center; gap: 8px;
    text-decoration: none; color: var(--text); margin-right: 24px;
}
.site-nav .logo-icon { font-size: 20px; color: var(--accent); }
.site-nav .logo-text {
    font-weight: 600; font-size: 13px; text-transform: uppercase; letter-spacing: 0.06em;
}
.site-nav .nav-links { display: flex; gap: 0; flex: 1; }
.site-nav .nav-link {
    background: none; border: none; color: var(--text-dim);
    font-family: var(--font-sans); font-size: 11px; font-weight: 500;
    text-transform: uppercase; letter-spacing: 0.06em;
    padding: 12px 14px; cursor: pointer; border-bottom: 2px solid transparent;
    text-decoration: none; margin-bottom: -1px;
    transition: color 0.15s, border-color 0.15s;
}
[data-theme="nasa"] .site-nav .nav-link { font-family: var(--font-mono); }
.site-nav .nav-link:hover { color: var(--text); }
.site-nav .nav-link.active { color: var(--accent); border-bottom-color: var(--accent); }
.site-nav .nav-controls {
    display: flex; align-items: center; gap: 10px; margin-left: auto;
}
.site-nav .theme-select {
    background: var(--surface2); border: 1px solid var(--border); color: var(--text-dim);
    font-family: var(--font-mono); font-size: 10px; padding: 4px 6px;
    border-radius: var(--radius); cursor: pointer;
}
.site-nav .status-dot {
    width: 8px; height: 8px; border-radius: 50%; background: var(--success);
    animation: pulse 2s infinite;
}
.site-nav .status-text {
    font-family: var(--font-mono); font-size: 11px; color: var(--text-dim);
}
@keyframes pulse { 0%,100%{opacity:1} 50%{opacity:0.4} }

/* ═══════════════════════════════════════════════════════════════════
   SHARED COMPONENTS
   ═══════════════════════════════════════════════════════════════════ */

/* Buttons */
.btn {
    display: inline-flex; align-items: center; justify-content: center;
    padding: 10px 18px; border: 1px solid var(--border); border-radius: var(--radius);
    font-family: var(--font-mono); font-size: 11px; font-weight: 500;
    text-transform: uppercase; letter-spacing: 0.05em;
    cursor: pointer; transition: all 0.15s; background: var(--surface2); color: var(--text);
}
.btn:hover { background: var(--accent); color: var(--bg); border-color: var(--accent); }
.btn-primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn-primary:hover { opacity: 0.85; }
.btn-success { background: var(--success); color: #fff; border-color: var(--success); }
.btn-success:hover { background: #388e3c; }
.btn-error { background: var(--error); color: #fff; border-color: var(--error); }
.btn-error:hover { background: #c62828; }
.btn-warning { background: var(--warning); color: #fff; border-color: var(--warning); }
.btn-warning:hover { background: #e68900; }
.btn-sm { padding: 6px 12px; font-size: 10px; }

/* Badges */
.badge {
    display: inline-block; padding: 2px 8px; border-radius: 2px;
    font-family: var(--font-mono); font-size: 0.65rem; font-weight: 500;
    text-transform: uppercase; letter-spacing: 0.03em;
}
.badge-accent { background: rgba(108,99,255,0.15); color: var(--accent); }
.badge-green { background: rgba(76,175,80,0.2); color: var(--success); }
.badge-gold { background: rgba(255,215,0,0.15); color: var(--gold); }
.badge-dim { background: var(--surface2); color: var(--text-dim); }

/* Cards */
.card {
    background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 20px; margin-bottom: 16px;
}
.card-title {
    font-size: 0.75rem; font-weight: 500; text-transform: uppercase;
    letter-spacing: 0.08em; color: var(--text-dim);
    margin-bottom: 12px; padding-bottom: 8px; border-bottom: 1px solid var(--border);
}

/* Stat grid */
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 12px; margin-bottom: 20px; }
.stat-card {
    background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 16px; text-align: center;
}
.stat-value { font-family: var(--font-mono); font-size: 2rem; font-weight: 300; color: var(--accent); }
.stat-label { font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-dim); margin-top: 4px; }

/* Tables */
.tufte-table { width: 100%; border-collapse: collapse; font-size: 12px; }
.tufte-table th {
    text-align: left; padding: 8px 12px; font-weight: 500; color: var(--text-dim);
    text-transform: uppercase; letter-spacing: 0.05em; font-size: 0.65rem;
    border-bottom: 1px solid var(--border); white-space: nowrap;
}
.tufte-table td {
    padding: 8px 12px; border-bottom: 1px solid var(--surface2);
    font-family: var(--font-sans); font-size: 12px;
}
.tufte-table td.mono { font-family: var(--font-mono); }
.tufte-table tr:hover { background: var(--surface2); }
.tufte-table .text-truncate { max-width: 250px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* Toast */
#toast, .toast {
    position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%);
    background: var(--accent); color: #fff; padding: 10px 20px;
    font-family: var(--font-mono); font-size: 12px;
    border-radius: var(--radius); z-index: 1000;
    opacity: 0; transition: opacity 0.25s; pointer-events: none;
}
#toast.show, .toast.show { opacity: 1; }

/* Spinner */
.spinner {
    width: 20px; height: 20px; border: 2px solid var(--border);
    border-top-color: var(--accent); border-radius: 50%;
    animation: spin 0.6s linear infinite; display: inline-block; margin-right: 8px;
    vertical-align: middle;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Empty state */
.empty-state { text-align: center; padding: 48px 20px; }
.empty-msg { font-size: 1.2rem; font-weight: 500; margin-bottom: 24px; }

/* Form inputs */
.form-input {
    width: 100%; padding: 10px 12px; background: var(--surface2);
    border: 1px solid var(--border); color: var(--text);
    font-family: var(--font-sans); font-size: 13px;
    border-radius: var(--radius);
}
.form-input:focus { outline: none; border-color: var(--accent); }
.form-select {
    background: var(--surface2); border: 1px solid var(--border); color: var(--text);
    font-family: var(--font-mono); font-size: 12px; padding: 8px 10px;
    border-radius: var(--radius); cursor: pointer;
}
.form-label {
    font-size: 0.7rem; font-weight: 500; text-transform: uppercase;
    letter-spacing: 0.08em; color: var(--text-dim); margin-bottom: 6px;
}

/* Progress bar */
.progress-bar { height: 6px; background: var(--surface2); border-radius: 3px; overflow: hidden; margin: 8px 0; }
.progress-fill { height: 100%; background: var(--accent); transition: width 0.4s ease; }