:root {
  --font-sans: "DM Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  --color-brand: #10b981;
  --color-brand-hover: #059669;
  --color-brand-soft: rgba(16, 185, 129, 0.12);
  --color-brand-glow: rgba(16, 185, 129, 0.35);

  --color-accent: #6366f1;
  --color-accent-soft: rgba(99, 102, 241, 0.12);

  --color-bg: #f4f6fb;
  --color-bg-elevated: #ffffff;
  --color-bg-panel: #0f172a;
  --color-bg-panel-soft: #1e293b;

  --color-text: #0f172a;
  --color-text-muted: #64748b;
  --color-text-inverse: #f8fafc;
  --color-text-inverse-muted: #94a3b8;

  --color-border: rgba(15, 23, 42, 0.08);
  --color-border-strong: rgba(15, 23, 42, 0.14);
  --color-input-bg: #ffffff;
  --color-input-border: #e2e8f0;
  --color-input-focus: var(--color-brand);

  --color-danger: #ef4444;
  --color-success: #22c55e;

  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 8px 24px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 24px 60px rgba(15, 23, 42, 0.12);
  --shadow-panel: 0 30px 80px rgba(0, 0, 0, 0.35);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  --transition: 0.2s ease;

  --layout-max-width: 1680px;
  --layout-padding-x: clamp(24px, 2.5vw, 48px);
  --layout-padding-y: clamp(24px, 2vw, 40px);
}

@media (min-width: 1920px) {
  :root {
    --layout-max-width: 1920px;
    --layout-padding-x: clamp(40px, 3vw, 72px);
  }
}

@media (min-width: 2560px) {
  :root {
    --layout-max-width: 2280px;
    --layout-padding-x: clamp(48px, 4vw, 96px);
  }
}

@media (min-width: 3200px) {
  :root {
    --layout-max-width: 2560px;
  }
}

[data-theme="dark"] {
  --color-bg: #020617;
  --color-bg-elevated: #0f172a;
  --color-bg-panel: #020617;
  --color-bg-panel-soft: #0f172a;

  --color-text: #f1f5f9;
  --color-text-muted: #94a3b8;
  --color-text-inverse: #f8fafc;
  --color-text-inverse-muted: #64748b;

  --color-border: rgba(148, 163, 184, 0.12);
  --color-border-strong: rgba(148, 163, 184, 0.22);
  --color-input-bg: #0b1220;
  --color-input-border: rgba(148, 163, 184, 0.2);

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 24px 60px rgba(0, 0, 0, 0.5);
}