:root {
  /* Local Vietnamese-supporting fonts (Be Vietnam Pro) */
  @font-face {
    font-family: 'Be Vietnam Pro';
    font-style: normal;
    font-weight: 400;
    font-display: swap;
    src: url('/static/fonts/be-vietnam-pro-regular.woff2') format('woff2');
  }
  @font-face {
    font-family: 'Be Vietnam Pro';
    font-style: normal;
    font-weight: 500;
    font-display: swap;
    src: url('/static/fonts/be-vietnam-pro-medium.woff2') format('woff2');
  }
  @font-face {
    font-family: 'Be Vietnam Pro';
    font-style: normal;
    font-weight: 600;
    font-display: swap;
    src: url('/static/fonts/be-vietnam-pro-semibold.woff2') format('woff2');
  }
  @font-face {
    font-family: 'Be Vietnam Pro';
    font-style: normal;
    font-weight: 700;
    font-display: swap;
    src: url('/static/fonts/be-vietnam-pro-bold.woff2') format('woff2');
  }
  @font-face {
    font-family: 'Be Vietnam Pro';
    font-style: normal;
    font-weight: 800;
    font-display: swap;
    src: url('/static/fonts/be-vietnam-pro-extrabold.woff2') format('woff2');
  }

  /* Brand colors - vibrant indigo/violet */
  --color-primary: #4f46e5;
  --color-primary-hover: #4338ca;
  --color-primary-light: #eef2ff;
  --color-accent: #7c3aed;
  --color-accent-light: #f5f3ff;

  /* Status colors - vibrant */
  --color-success: #10b981;
  --color-success-light: #d1fae5;
  --color-warning: #f59e0b;
  --color-warning-light: #fef3c7;
  --color-danger: #ef4444;
  --color-danger-light: #fee2e2;
  --color-info: #0ea5e9;
  --color-info-light: #e0f2fe;
  --color-review: #c026d3;
  --color-review-light: #fae8ff;
  --color-cyan: #06b6d4;
  --color-cyan-light: #cffafe;
  --color-rose: #f43f5e;
  --color-rose-light: #ffe4e6;

  --color-bg: #f5f7ff;
  --color-bg-2: #fafbff;
  --color-surface: #ffffff;
  --color-surface-2: #f1f5f9;
  --color-surface-3: #e9eef9;
  --color-border: #e2e8f0;
  --color-border-strong: #cbd5e1;
  --color-text: #0f172a;
  --color-text-soft: #475569;
  --color-text-muted: #94a3b8;

  --shadow-sm: 0 1px 2px rgba(15,23,42,0.05);
  --shadow-md: 0 4px 6px -1px rgba(15,23,42,0.08), 0 2px 4px -2px rgba(15,23,42,0.05);
  --shadow-lg: 0 10px 15px -3px rgba(15,23,42,0.10), 0 4px 6px -4px rgba(15,23,42,0.05);
  --shadow-xl: 0 20px 25px -5px rgba(15,23,42,0.12), 0 8px 10px -6px rgba(15,23,42,0.05);
  --shadow-glow-primary: 0 0 0 4px rgba(79, 70, 229, 0.18);
  --shadow-glow-success: 0 0 0 4px rgba(16, 185, 129, 0.18);

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-7: 32px;
  --space-8: 40px;
  --space-10: 56px;

  --font-sans: "Be Vietnam Pro", -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Roboto, "Noto Sans", "Tahoma", Arial, sans-serif;
  --font-mono: "SF Mono", Menlo, Consolas, "Roboto Mono", monospace;

  --transition: 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
  --color-primary: #818cf8;
  --color-primary-hover: #a5b4fc;
  --color-primary-light: #1e1b4b;
  --color-accent: #a78bfa;
  --color-accent-light: #2e1065;
  --color-success: #34d399;
  --color-success-light: #064e3b;
  --color-warning: #fbbf24;
  --color-warning-light: #422006;
  --color-danger: #f87171;
  --color-danger-light: #450a0a;
  --color-info: #38bdf8;
  --color-info-light: #082f49;
  --color-review: #e879f9;
  --color-review-light: #4a044e;
  --color-cyan: #22d3ee;
  --color-cyan-light: #083344;
  --color-rose: #fb7185;
  --color-rose-light: #4c0519;

  --color-bg: #0b1220;
  --color-bg-2: #0a0f1c;
  --color-surface: #131c30;
  --color-surface-2: #1a2440;
  --color-surface-3: #232e4a;
  --color-border: #1e293b;
  --color-border-strong: #334155;
  --color-text: #f1f5f9;
  --color-text-soft: #cbd5e1;
  --color-text-muted: #64748b;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.4);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.5), 0 2px 4px -2px rgba(0,0,0,0.3);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.5), 0 4px 6px -4px rgba(0,0,0,0.3);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.6), 0 8px 10px -6px rgba(0,0,0,0.3);
  --shadow-glow-primary: 0 0 0 4px rgba(129, 140, 248, 0.22);
  --shadow-glow-success: 0 0 0 4px rgba(52, 211, 153, 0.22);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  font-size: 14.5px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  scroll-behavior: smooth;
}

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover { color: var(--color-primary-hover); }

h1,h2,h3,h4,h5,h6 {
  margin: 0 0 var(--space-3);
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.01em;
}
h1 { font-size: 1.75rem; background: linear-gradient(135deg, var(--color-text), var(--color-primary)); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
h2 { font-size: 1.35rem; }
h3 { font-size: 1.1rem; }
h4 { font-size: 1rem; }

p { margin: 0 0 var(--space-3); }
small { color: var(--color-text-soft); }
code { font-family: var(--font-mono); background: var(--color-surface-2); padding: 2px 6px; border-radius: var(--radius-sm); font-size: 0.9em; color: var(--color-primary); }

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
  color: var(--color-text);
}

img { max-width: 100%; height: auto; }

kbd {
  display: inline-block;
  padding: 2px 6px;
  font-family: var(--font-mono);
  font-size: 0.8em;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-bottom-width: 2px;
  border-radius: 4px;
}

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--color-border-strong); border-radius: 10px; }
::-webkit-scrollbar-thumb:hover { background: var(--color-text-muted); }