@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Noto+Sans+KR:wght@300;400;500;700&display=swap');

:root {
  --bg-primary: #090d16;
  --bg-secondary: #0f172a;
  --bg-glass: rgba(15, 23, 42, 0.72);
  --bg-glass-card: rgba(30, 41, 59, 0.55);
  --bg-glass-card-hover: rgba(51, 65, 85, 0.65);
  --border-glass: rgba(255, 255, 255, 0.08);
  --border-glass-active: rgba(99, 102, 241, 0.5);
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent-primary: #6366f1;
  --accent-secondary: #4f46e5;
  --accent-glow: rgba(99, 102, 241, 0.25);
  --accent-success: #10b981;
  --accent-warning: #f59e0b;
  --accent-danger: #ef4444;
  --glass-blur: 16px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  --safe-bottom: env(safe-area-inset-bottom, 16px);
  --safe-top: env(safe-area-inset-top, 0px);
}

[data-theme="light"] {
  --bg-primary: #f1f5f9;
  --bg-secondary: #e2e8f0;
  --bg-glass: rgba(255, 255, 255, 0.82);
  --bg-glass-card: rgba(255, 255, 255, 0.7);
  --bg-glass-card-hover: rgba(255, 255, 255, 0.95);
  --border-glass: rgba(0, 0, 0, 0.08);
  --border-glass-active: rgba(99, 102, 241, 0.6);
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --accent-primary: #4f46e5;
  --accent-secondary: #4338ca;
  --accent-glow: rgba(99, 102, 241, 0.15);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: 'Inter', 'Noto Sans KR', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* Glassmorphism utility classes */
.glass-panel {
  background: var(--bg-glass);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--border-glass);
}

.glass-card {
  background: var(--bg-glass-card);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.glass-card:hover {
  border-color: var(--border-glass-active);
  background: var(--bg-glass-card-hover);
  box-shadow: 0 8px 24px var(--accent-glow);
}

.glass-input {
  background: var(--bg-glass-card);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-glass);
  color: var(--text-primary);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-size: 14px;
  outline: none;
  transition: border-color 0.2s;
}

.glass-input:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 2px var(--accent-glow);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  color: #ffffff;
  border: none;
  border-radius: var(--radius-sm);
  padding: 10px 18px;
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: all 0.2s;
}

.btn-primary:hover {
  opacity: 0.94;
  transform: translateY(-1px);
  box-shadow: 0 4px 14px var(--accent-glow);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  background: var(--bg-glass-card);
  color: var(--text-primary);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-sm);
  padding: 10px 16px;
  font-weight: 500;
  font-size: 14px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: all 0.2s;
}

.btn-secondary:hover {
  background: var(--bg-glass-card-hover);
  border-color: var(--border-glass-active);
}

/* Touch & clickable standards */
button, a, [role="button"] {
  cursor: pointer;
}

/* Hangul typography highlight */
.font-hangul {
  font-family: 'Noto Sans KR', sans-serif;
  letter-spacing: -0.02em;
}

/* Animations */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.animate-fade-in {
  animation: fadeIn 0.25s ease forwards;
}

/* Custom scrollbars */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: var(--border-glass);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}