/* ========================================================
   Design Tokens & CSS Variables - QR 출석 관리 시스템
   Theme: Sleek Cyber Dark Mode (Original)
   ======================================================== */

@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@400;500;600;700;800&family=Plus+Jakarta+Sans:wght@400;500;600;700&display=swap');

:root {
  /* Color Palette (Modern Deep Slate & Vibrant Neon Accents) */
  --bg-app: #080b14;
  --bg-surface: #0f172a;
  --bg-card: rgba(17, 24, 39, 0.72);
  --bg-card-hover: rgba(30, 41, 59, 0.85);
  --bg-elevated: #1e293b;
  --bg-overlay: rgba(8, 11, 20, 0.78);

  /* Primary Brand (Electric Indigo / Violet) */
  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --primary-light: #818cf8;
  --primary-glow: rgba(99, 102, 241, 0.35);
  --primary-gradient: linear-gradient(135deg, #6366f1 0%, #a855f7 100%);

  /* Status Accents */
  --accent-cyan: #06b6d4;
  --accent-cyan-glow: rgba(6, 182, 212, 0.3);
  --success: #10b981;
  --success-glow: rgba(16, 185, 129, 0.3);
  --warning: #f59e0b;
  --warning-glow: rgba(245, 158, 11, 0.3);
  --danger: #f43f5e;
  --danger-glow: rgba(244, 63, 94, 0.3);

  /* Text & Foreground */
  --text-main: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-inverse: #0f172a;

  /* Glassmorphism & Borders */
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-focus: rgba(99, 102, 241, 0.6);
  --border-glow: 0 0 15px rgba(99, 102, 241, 0.25);
  --glass-blur: blur(16px);

  /* Elevation Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -2px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 25px -5px rgba(0, 0, 0, 0.5), 0 8px 10px -6px rgba(0, 0, 0, 0.4);
  --shadow-xl: 0 20px 35px -5px rgba(0, 0, 0, 0.6), 0 10px 10px -5px rgba(0, 0, 0, 0.4);

  /* Spacing & Radii */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 26px;
  --radius-full: 9999px;

  /* Typography */
  --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-body: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  /* Animation Easings */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 400ms cubic-bezier(0.16, 1, 0.3, 1);
}