/* theme.css — Premium cybersecurity dashboard theme
 *
 * Design language: Deep navy foundation, electric blue accent, layered depth.
 * Inspired by Datadog, Grafana, Cloudflare Dashboard.
 * Two modes: Light (clean workspace) and Dark (SOC-ready).
 */

:root {
    color-scheme: light dark;

    /* Typography */
    --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;
    --font-display: 'Inter', system-ui, -apple-system, sans-serif;

    /* Spacing scale */
    --radius-sm: 4px;
    --radius: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;

    /* Timing */
    --transition: 180ms ease;
    --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-spring: 400ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ═══════════════════════════════════════════════════════════════
   LIGHT THEME — Clean professional workspace
   ═══════════════════════════════════════════════════════════════ */
[data-theme="light"], :root {
    /* Surfaces — layered depth */
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f1f5f9;
    --bg-card: #ffffff;
    --bg-elevated: #ffffff;
    --bg-sunken: #f1f5f9;
    --bg-overlay: rgba(15, 23, 42, 0.4);
    --bg-glass: rgba(255, 255, 255, 0.8);

    /* Text — clear hierarchy */
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --text-inverse: #f8fafc;

    /* Borders */
    --border: #e2e8f0;
    --border-light: #f1f5f9;
    --border-strong: #cbd5e1;
    --border-focus: #3b82f6;

    /* Accent — Electric blue */
    --accent: #2563eb;
    --accent-hover: #1d4ed8;
    --accent-light: rgba(37, 99, 235, 0.08);
    --accent-medium: rgba(37, 99, 235, 0.15);
    --accent-glow: rgba(37, 99, 235, 0.25);
    --accent-gradient: linear-gradient(135deg, #2563eb 0%, #3b82f6 50%, #6366f1 100%);

    /* Semantic colors */
    --success: #059669;
    --success-bg: rgba(5, 150, 105, 0.08);
    --success-border: rgba(5, 150, 105, 0.2);
    --warning: #d97706;
    --warning-bg: rgba(217, 119, 6, 0.08);
    --warning-border: rgba(217, 119, 6, 0.2);
    --danger: #dc2626;
    --danger-bg: rgba(220, 38, 38, 0.08);
    --danger-border: rgba(220, 38, 38, 0.2);
    --info: #0284c7;
    --info-bg: rgba(2, 132, 199, 0.08);
    --info-border: rgba(2, 132, 199, 0.2);

    /* Sidebar — Dark contrasting panel */
    --sidebar-bg: linear-gradient(180deg, #0f172a 0%, #1e293b 100%);
    --sidebar-text: #cbd5e1;
    --sidebar-active: rgba(59, 130, 246, 0.9);
    --sidebar-active-text: #ffffff;
    --sidebar-hover: rgba(255, 255, 255, 0.06);
    --sidebar-border: rgba(255, 255, 255, 0.06);
    --sidebar-brand: linear-gradient(135deg, #3b82f6, #8b5cf6);

    /* Charts */
    --chart-primary: #2563eb;
    --chart-secondary: #7c3aed;
    --chart-tertiary: #0891b2;
    --chart-quaternary: #059669;
    --chart-quinary: #d97706;
    --chart-grid: #e2e8f0;
    --chart-text: #64748b;

    /* Shadows — layered elevation system */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
    --shadow-glow: 0 0 20px rgba(37, 99, 235, 0.15);
    --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.04), 0 0 0 1px rgba(0, 0, 0, 0.02);
    --shadow-card-hover: 0 8px 16px -4px rgba(0, 0, 0, 0.08), 0 0 0 1px rgba(37, 99, 235, 0.08);

    /* Focus ring */
    --focus-ring: 0 0 0 2px var(--bg-primary), 0 0 0 4px var(--accent);
    --focus-ring-danger: 0 0 0 2px var(--bg-primary), 0 0 0 4px var(--danger);

    /* Login */
    --login-bg: linear-gradient(135deg, #0f172a 0%, #1e293b 40%, #0f172a 100%);
    --login-pattern: radial-gradient(circle at 25% 25%, rgba(59, 130, 246, 0.05) 0%, transparent 50%),
                     radial-gradient(circle at 75% 75%, rgba(99, 102, 241, 0.05) 0%, transparent 50%);
}

/* ═══════════════════════════════════════════════════════════════
   DARK THEME — Immersive command center
   ═══════════════════════════════════════════════════════════════ */
[data-theme="dark"] {
    /* Surfaces — deep navy layering */
    --bg-primary: #0b1120;
    --bg-secondary: #111827;
    --bg-tertiary: #1e293b;
    --bg-card: #141c2e;
    --bg-elevated: #1a2332;
    --bg-sunken: #080d19;
    --bg-overlay: rgba(0, 0, 0, 0.6);
    --bg-glass: rgba(20, 28, 46, 0.85);

    /* Text */
    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    --text-muted: #4b5563;
    --text-inverse: #0f172a;

    /* Borders — subtle glow edges */
    --border: rgba(148, 163, 184, 0.1);
    --border-light: rgba(148, 163, 184, 0.06);
    --border-strong: rgba(148, 163, 184, 0.18);
    --border-focus: #3b82f6;

    /* Accent — Bright electric blue */
    --accent: #3b82f6;
    --accent-hover: #60a5fa;
    --accent-light: rgba(59, 130, 246, 0.1);
    --accent-medium: rgba(59, 130, 246, 0.2);
    --accent-glow: rgba(59, 130, 246, 0.3);
    --accent-gradient: linear-gradient(135deg, #3b82f6 0%, #60a5fa 50%, #818cf8 100%);

    /* Semantic — Higher saturation for dark backgrounds */
    --success: #22c55e;
    --success-bg: rgba(34, 197, 94, 0.1);
    --success-border: rgba(34, 197, 94, 0.25);
    --warning: #eab308;
    --warning-bg: rgba(234, 179, 8, 0.1);
    --warning-border: rgba(234, 179, 8, 0.25);
    --danger: #ef4444;
    --danger-bg: rgba(239, 68, 68, 0.1);
    --danger-border: rgba(239, 68, 68, 0.25);
    --info: #06b6d4;
    --info-bg: rgba(6, 182, 212, 0.1);
    --info-border: rgba(6, 182, 212, 0.25);

    /* Sidebar — Darker panel with subtle gradient */
    --sidebar-bg: linear-gradient(180deg, #060a14 0%, #0b1120 100%);
    --sidebar-text: #8896ab;
    --sidebar-active: rgba(59, 130, 246, 0.9);
    --sidebar-active-text: #ffffff;
    --sidebar-hover: rgba(255, 255, 255, 0.04);
    --sidebar-border: rgba(255, 255, 255, 0.04);
    --sidebar-brand: linear-gradient(135deg, #3b82f6, #8b5cf6);

    /* Charts — Bright on dark */
    --chart-primary: #60a5fa;
    --chart-secondary: #a78bfa;
    --chart-tertiary: #22d3ee;
    --chart-quaternary: #34d399;
    --chart-quinary: #fbbf24;
    --chart-grid: rgba(148, 163, 184, 0.08);
    --chart-text: #64748b;

    /* Shadows — Subtle depth on dark */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.4), 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.5), 0 2px 4px -2px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -4px rgba(0, 0, 0, 0.4);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 8px 10px -6px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 30px rgba(59, 130, 246, 0.15), 0 0 60px rgba(59, 130, 246, 0.05);
    --shadow-card: 0 0 0 1px rgba(148, 163, 184, 0.06), 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-card-hover: 0 0 0 1px rgba(59, 130, 246, 0.15), 0 8px 24px rgba(0, 0, 0, 0.4), 0 0 20px rgba(59, 130, 246, 0.06);

    /* Focus ring */
    --focus-ring: 0 0 0 2px var(--bg-primary), 0 0 0 4px var(--accent);
    --focus-ring-danger: 0 0 0 2px var(--bg-primary), 0 0 0 4px var(--danger);

    /* Login */
    --login-bg: linear-gradient(135deg, #020617 0%, #0b1120 40%, #020617 100%);
    --login-pattern: radial-gradient(circle at 25% 25%, rgba(59, 130, 246, 0.08) 0%, transparent 50%),
                     radial-gradient(circle at 75% 75%, rgba(99, 102, 241, 0.06) 0%, transparent 50%),
                     radial-gradient(circle at 50% 50%, rgba(6, 182, 212, 0.04) 0%, transparent 40%);
}

/* ═══════════════════════════════════════════════════════════════
   SYSTEM PREFERENCE — Follow OS setting
   ═══════════════════════════════════════════════════════════════ */
@media (prefers-color-scheme: dark) {
    [data-theme="system"] {
        --bg-primary: #0b1120;
        --bg-secondary: #111827;
        --bg-tertiary: #1e293b;
        --bg-card: #141c2e;
        --bg-elevated: #1a2332;
        --bg-sunken: #080d19;
        --bg-overlay: rgba(0, 0, 0, 0.6);
        --bg-glass: rgba(20, 28, 46, 0.85);

        --text-primary: #e2e8f0;
        --text-secondary: #94a3b8;
        --text-muted: #4b5563;
        --text-inverse: #0f172a;

        --border: rgba(148, 163, 184, 0.1);
        --border-light: rgba(148, 163, 184, 0.06);
        --border-strong: rgba(148, 163, 184, 0.18);
        --border-focus: #3b82f6;

        --accent: #3b82f6;
        --accent-hover: #60a5fa;
        --accent-light: rgba(59, 130, 246, 0.1);
        --accent-medium: rgba(59, 130, 246, 0.2);
        --accent-glow: rgba(59, 130, 246, 0.3);
        --accent-gradient: linear-gradient(135deg, #3b82f6 0%, #60a5fa 50%, #818cf8 100%);

        --success: #22c55e;
        --success-bg: rgba(34, 197, 94, 0.1);
        --success-border: rgba(34, 197, 94, 0.25);
        --warning: #eab308;
        --warning-bg: rgba(234, 179, 8, 0.1);
        --warning-border: rgba(234, 179, 8, 0.25);
        --danger: #ef4444;
        --danger-bg: rgba(239, 68, 68, 0.1);
        --danger-border: rgba(239, 68, 68, 0.25);
        --info: #06b6d4;
        --info-bg: rgba(6, 182, 212, 0.1);
        --info-border: rgba(6, 182, 212, 0.25);

        --sidebar-bg: linear-gradient(180deg, #060a14 0%, #0b1120 100%);
        --sidebar-text: #8896ab;
        --sidebar-active: rgba(59, 130, 246, 0.9);
        --sidebar-active-text: #ffffff;
        --sidebar-hover: rgba(255, 255, 255, 0.04);
        --sidebar-border: rgba(255, 255, 255, 0.04);
        --sidebar-brand: linear-gradient(135deg, #3b82f6, #8b5cf6);

        --chart-primary: #60a5fa;
        --chart-secondary: #a78bfa;
        --chart-tertiary: #22d3ee;
        --chart-quaternary: #34d399;
        --chart-quinary: #fbbf24;
        --chart-grid: rgba(148, 163, 184, 0.08);
        --chart-text: #64748b;

        --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.3);
        --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.4), 0 1px 2px rgba(0, 0, 0, 0.3);
        --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.5), 0 2px 4px -2px rgba(0, 0, 0, 0.4);
        --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -4px rgba(0, 0, 0, 0.4);
        --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 8px 10px -6px rgba(0, 0, 0, 0.4);
        --shadow-glow: 0 0 30px rgba(59, 130, 246, 0.15), 0 0 60px rgba(59, 130, 246, 0.05);
        --shadow-card: 0 0 0 1px rgba(148, 163, 184, 0.06), 0 2px 8px rgba(0, 0, 0, 0.3);
        --shadow-card-hover: 0 0 0 1px rgba(59, 130, 246, 0.15), 0 8px 24px rgba(0, 0, 0, 0.4), 0 0 20px rgba(59, 130, 246, 0.06);

        --focus-ring: 0 0 0 2px var(--bg-primary), 0 0 0 4px var(--accent);
        --focus-ring-danger: 0 0 0 2px var(--bg-primary), 0 0 0 4px var(--danger);

        --login-bg: linear-gradient(135deg, #020617 0%, #0b1120 40%, #020617 100%);
        --login-pattern: radial-gradient(circle at 25% 25%, rgba(59, 130, 246, 0.08) 0%, transparent 50%),
                         radial-gradient(circle at 75% 75%, rgba(99, 102, 241, 0.06) 0%, transparent 50%),
                         radial-gradient(circle at 50% 50%, rgba(6, 182, 212, 0.04) 0%, transparent 40%);
    }
}