/* ──────────────── Theme System ──────────────── */
/* Include this in all pages via <link> or inline */

:root, [data-theme="dark"] {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --accent: #06b6d4;
    --bg: #0a0a0f;
    --bg-card: #12121a;
    --bg-card-hover: #1a1a2e;
    --nav-bg: rgba(10,10,15,0.85);
    --text: #e2e8f0;
    --text-heading: #ffffff;
    --text-muted: #94a3b8;
    --border: #1e293b;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --gradient: linear-gradient(135deg, #6366f1, #06b6d4);
    --input-bg: #0d1117;
    --shadow: 0 4px 12px rgba(0,0,0,0.4);
}

[data-theme="light"] {
    --primary: #4f46e5;
    --primary-dark: #4338ca;
    --accent: #0891b2;
    --bg: #f8fafc;
    --bg-card: #ffffff;
    --bg-card-hover: #f1f5f9;
    --nav-bg: rgba(255,255,255,0.9);
    --text: #1e293b;
    --text-heading: #0f172a;
    --text-muted: #64748b;
    --border: #e2e8f0;
    --success: #059669;
    --warning: #d97706;
    --danger: #dc2626;
    --gradient: linear-gradient(135deg, #4f46e5, #0891b2);
    --input-bg: #f1f5f9;
    --shadow: 0 4px 12px rgba(0,0,0,0.08);
}

/* Theme toggle button */
.theme-toggle {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--bg-card);
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 1.3rem;
    z-index: 9999;
    transition: transform 0.2s, box-shadow 0.2s;
    box-shadow: var(--shadow);
}
.theme-toggle:hover {
    transform: scale(1.1);
}