/* ================================================================
   국민계산기 디자인 시스템 (Design System)
   - 브랜딩 가이드라인, 감성 디자인 토큰, 유틸리티 클래스
   ================================================================ */

/* ===== 1. 브랜드 컬러 팔레트 ===== */
:root {
  /* Primary: 신뢰의 네이비 블루 */
  --brand-navy: #1e3a8a;
  --brand-navy-90: #1e2d5f;
  --brand-navy-50: #3b6fd4;

  /* Accent: 생동감 있는 블루 */
  --brand-blue: #3b82f6;
  --brand-blue-light: #60a5fa;
  --brand-blue-soft: rgba(59, 130, 246, 0.1);

  /* Secondary: 성장의 그린 */
  --brand-green: #10b981;
  --brand-green-light: #34d399;
  --brand-green-soft: rgba(16, 185, 129, 0.1);

  /* Warm: 따뜻한 포인트 */
  --brand-amber: #f59e0b;
  --brand-amber-soft: rgba(245, 158, 11, 0.1);

  /* Danger: 경고/주의 */
  --brand-red: #ef4444;
  --brand-red-soft: rgba(239, 68, 68, 0.1);

  /* Neutral */
  --brand-gray-50: #f8fafc;
  --brand-gray-100: #f1f5f9;
  --brand-gray-200: #e2e8f0;
  --brand-gray-300: #cbd5e1;
  --brand-gray-400: #94a3b8;
  --brand-gray-500: #64748b;
  --brand-gray-600: #475569;
  --brand-gray-700: #334155;
  --brand-gray-800: #1e293b;
  --brand-gray-900: #0f172a;

  /* 그라디언트 프리셋 */
  --gradient-brand: linear-gradient(135deg, var(--brand-navy) 0%, var(--brand-blue) 100%);
  --gradient-hero: linear-gradient(135deg, var(--brand-navy) 0%, var(--brand-blue) 50%, var(--brand-green) 100%);
  --gradient-warm: linear-gradient(135deg, var(--brand-blue) 0%, var(--brand-green) 100%);
  --gradient-subtle: linear-gradient(135deg, var(--brand-gray-50) 0%, var(--brand-gray-100) 100%);
}

/* ===== 2. 타이포그래피 스케일 ===== */
:root {
  --font-display: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-body: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'Fira Code', 'Cascadia Code', 'SF Mono', monospace;

  /* 텍스트 크기 (모바일 우선) */
  --text-xs: 0.75rem;    /* 12px */
  --text-sm: 0.875rem;   /* 14px */
  --text-base: 1rem;     /* 16px */
  --text-lg: 1.125rem;   /* 18px */
  --text-xl: 1.25rem;    /* 20px */
  --text-2xl: 1.5rem;    /* 24px */
  --text-3xl: 1.875rem;  /* 30px */
  --text-4xl: 2.25rem;   /* 36px */

  /* 줄 간격 */
  --leading-tight: 1.3;
  --leading-normal: 1.7;
  --leading-relaxed: 1.9;

  /* 자간 */
  --tracking-tight: -0.01em;
  --tracking-normal: 0;
  --tracking-wide: 0.02em;
}

/* ===== 3. 감성 디자인 토큰 ===== */
:root {
  /* 부드러운 전환 */
  --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-bounce: cubic-bezier(0.68, -0.55, 0.27, 1.55);
  --duration-fast: 150ms;
  --duration-normal: 250ms;
  --duration-slow: 400ms;

  /* 감성 그림자 (따뜻한 느낌) */
  --shadow-warm-sm: 0 1px 3px rgba(30, 58, 138, 0.06);
  --shadow-warm: 0 4px 12px rgba(30, 58, 138, 0.08);
  --shadow-warm-md: 0 8px 24px rgba(30, 58, 138, 0.1);
  --shadow-warm-lg: 0 16px 48px rgba(30, 58, 138, 0.12);
  --shadow-warm-xl: 0 24px 64px rgba(30, 58, 138, 0.15);
  --shadow-glow: 0 0 20px rgba(59, 130, 246, 0.15);

  /* 포커스 링 */
  --ring-primary: 0 0 0 3px rgba(59, 130, 246, 0.3);
  --ring-green: 0 0 0 3px rgba(16, 185, 129, 0.3);
  --ring-danger: 0 0 0 3px rgba(239, 68, 68, 0.3);
}

/* 다크모드 감성 토큰 */
[data-theme="dark"] {
  --shadow-warm-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-warm: 0 4px 12px rgba(0, 0, 0, 0.35);
  --shadow-warm-md: 0 8px 24px rgba(0, 0, 0, 0.4);
  --shadow-warm-lg: 0 16px 48px rgba(0, 0, 0, 0.45);
  --shadow-glow: 0 0 20px rgba(59, 130, 246, 0.2);
  --gradient-subtle: linear-gradient(135deg, var(--brand-gray-800) 0%, var(--brand-gray-900) 100%);
}

/* ===== 4. 감성 인터랙션 ===== */

/* 부드럽게 떠오르는 카드 */
.hover-lift {
  transition: transform var(--duration-normal) var(--ease-smooth),
              box-shadow var(--duration-normal) var(--ease-smooth);
}
.hover-lift:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-warm-md);
}

/* 살짝 커지는 버튼 */
.hover-scale {
  transition: transform var(--duration-fast) var(--ease-spring);
}
.hover-scale:hover {
  transform: scale(1.02);
}
.hover-scale:active {
  transform: scale(0.98);
}

/* 글로우 효과 */
.hover-glow:hover {
  box-shadow: var(--shadow-glow);
}

/* 포커스 링 */
.focus-ring:focus-visible {
  outline: none;
  box-shadow: var(--ring-primary);
}

/* ===== 5. 애니메이션 프리셋 ===== */

/* 페이드인 */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* 슬라이드인 */
@keyframes slideUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* 펄스 글로우 */
@keyframes pulseGlow {
  0%, 100% { box-shadow: 0 0 0 0 rgba(59, 130, 246, 0.4); }
  50% { box-shadow: 0 0 0 8px rgba(59, 130, 246, 0); }
}

/* 숫자 카운트업 효과 */
@keyframes countUp {
  from { opacity: 0; transform: scale(0.8); }
  to { opacity: 1; transform: scale(1); }
}

.animate-fadein { animation: fadeIn var(--duration-slow) var(--ease-smooth) both; }
.animate-slideup { animation: slideUp var(--duration-slow) var(--ease-smooth) both; }
.animate-pulse { animation: pulseGlow 2s infinite; }
.animate-count { animation: countUp 0.3s var(--ease-spring) both; }

/* 순차적 애니메이션 딜레이 */
.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }
.delay-4 { animation-delay: 0.4s; }

/* ===== 6. 감성 컴포넌트 확장 ===== */

/* 그라디언트 텍스트 */
.text-gradient {
  background: var(--gradient-warm);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* 배지 (상태 표시) */
.badge-primary {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  background: var(--brand-blue-soft);
  color: var(--brand-blue);
  border-radius: 9999px;
  font-size: var(--text-xs);
  font-weight: 600;
}
.badge-success {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  background: var(--brand-green-soft);
  color: var(--brand-green);
  border-radius: 9999px;
  font-size: var(--text-xs);
  font-weight: 600;
}
.badge-warning {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  background: var(--brand-amber-soft);
  color: var(--brand-amber);
  border-radius: 9999px;
  font-size: var(--text-xs);
  font-weight: 600;
}
.badge-danger {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  background: var(--brand-red-soft);
  color: var(--brand-red);
  border-radius: 9999px;
  font-size: var(--text-xs);
  font-weight: 600;
}

/* 인포 카드 */
.info-banner {
  padding: 1rem 1.25rem;
  border-radius: 12px;
  font-size: var(--text-sm);
  line-height: 1.6;
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
}
.info-banner.info {
  background: var(--brand-blue-soft);
  border: 1px solid rgba(59, 130, 246, 0.2);
  color: var(--brand-blue);
}
.info-banner.success {
  background: var(--brand-green-soft);
  border: 1px solid rgba(16, 185, 129, 0.2);
  color: var(--brand-green);
}
.info-banner.warning {
  background: var(--brand-amber-soft);
  border: 1px solid rgba(245, 158, 11, 0.2);
  color: var(--brand-amber);
}
.info-banner.danger {
  background: var(--brand-red-soft);
  border: 1px solid rgba(239, 68, 68, 0.2);
  color: var(--brand-red);
}

/* ===== 7. 진행률 바 ===== */
.progress-bar {
  width: 100%;
  height: 8px;
  background: var(--brand-gray-200);
  border-radius: 9999px;
  overflow: hidden;
}
.progress-bar .fill {
  height: 100%;
  background: var(--gradient-warm);
  border-radius: 9999px;
  transition: width var(--duration-slow) var(--ease-smooth);
}

[data-theme="dark"] .progress-bar {
  background: var(--brand-gray-700);
}

/* ===== 8. 통계 카드 ===== */
.stat-highlight {
  text-align: center;
  padding: 1.5rem 1rem;
}
.stat-highlight .value {
  font-size: var(--text-3xl);
  font-weight: 900;
  color: var(--brand-navy);
  line-height: var(--leading-tight);
}
.stat-highlight .label {
  font-size: var(--text-sm);
  color: var(--brand-gray-500);
  margin-top: 0.25rem;
}
[data-theme="dark"] .stat-highlight .value {
  color: var(--brand-blue-light);
}

/* ===== 9. 스크롤바 커스텀 ===== */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: var(--brand-gray-300);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--brand-gray-400);
}
[data-theme="dark"] ::-webkit-scrollbar-thumb {
  background: var(--brand-gray-600);
}

/* ===== 10. 셀렉션(선택) 스타일 ===== */
::selection {
  background: rgba(59, 130, 246, 0.2);
  color: var(--brand-navy);
}
[data-theme="dark"] ::selection {
  background: rgba(59, 130, 246, 0.3);
  color: var(--brand-blue-light);
}

/* ===== 11. 반응형 유틸리티 ===== */
@media (max-width: 768px) {
  :root {
    --text-3xl: 1.5rem;
    --text-4xl: 1.875rem;
  }
}

@media (max-width: 480px) {
  :root {
    --text-2xl: 1.25rem;
    --text-3xl: 1.375rem;
    --text-4xl: 1.5rem;
  }
}

/* ===== 12. 인쇄 스타일 ===== */
@media print {
  .site-header, .site-footer, .ad-slot, .share-buttons, .dark-toggle, .mobile-menu-btn {
    display: none !important;
  }
  body { background: white; color: black; }
  .result-card { background: #f0f0f0 !important; color: black !important; }
}