/* style.css - 지엘행정사 사무소 공식 홈페이지 디자인 시스템 */

/* --- 1. CSS Variables (Design System) --- */
:root {
  /* Colors - 브랜딩: 차분하고 신뢰 중심의 네이비, 따뜻한 베이지, 깔끔한 화이트/그레이 */
  --color-primary: #1A2B4C; /* 다크 네이비 (전문성, 신뢰) */
  --color-primary-light: #2A3F6C;
  --color-secondary: #C8B08A; /* 웜 베이지/골드 (프리미엄, 따뜻함) */
  --color-secondary-hover: #B59C75;
  --color-background: #FAFAFA; /* 매우 밝은 웜 그레이 (눈이 편안한 배경) */
  --color-surface: #FFFFFF; /* 카드 영역 배경 */
  
  --color-text-main: #222222;
  --color-text-muted: #555555;
  --color-text-light: #888888;
  --color-text-on-primary: #FFFFFF;
  
  --color-border: #E5E5E5;
  --color-error: #D32F2F; /* 반려 포인트 등 강조 */
  --color-success: #388E3C;
  
  /* Typography - 구글 폰트 Pretendard 활용 */
  --font-family-main: 'Pretendard', -apple-system, BlinkMacSystemFont, system-ui, Roboto, 'Helvetica Neue', 'Segoe UI', 'Apple SD Gothic Neo', 'Noto Sans KR', 'Malgun Gothic', 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol', sans-serif;
  
  --font-size-xs: 0.75rem;   /* 12px */
  --font-size-sm: 0.875rem;  /* 14px */
  --font-size-base: 1rem;    /* 16px */
  --font-size-md: 1.125rem;  /* 18px */
  --font-size-lg: 1.25rem;   /* 20px */
  --font-size-xl: 1.5rem;    /* 24px */
  --font-size-2xl: 2rem;     /* 32px */
  --font-size-3xl: 2.5rem;   /* 40px */
  --font-size-4xl: 3rem;     /* 48px */
  
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  
  /* Spacing */
  --spacing-1: 0.25rem;  /* 4px */
  --spacing-2: 0.5rem;   /* 8px */
  --spacing-3: 0.75rem;  /* 12px */
  --spacing-4: 1rem;     /* 16px */
  --spacing-5: 1.5rem;   /* 24px */
  --spacing-6: 2rem;     /* 32px */
  --spacing-8: 3rem;     /* 48px */
  --spacing-10: 4rem;    /* 64px */
  --spacing-12: 6rem;    /* 96px */
  --spacing-16: 8rem;    /* 128px */
  
  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
  
  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px; /* Pill 모양 */
  
  /* Transitions */
  --transition-fast: 0.15s ease-in-out;
  --transition-normal: 0.3s ease-in-out;
  --transition-slow: 0.5s ease;
  
  /* Layout */
  --container-width-max: 1200px;
  --header-height: 80px;
}

/* --- 2. CSS Reset & Base --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px; /* 기준 폰트 사이즈 */
  scroll-behavior: smooth;
  font-family: var(--font-family-main);
  color: var(--color-text-main);
  background-color: var(--color-background);
  line-height: 1.6;
  word-break: keep-all; /* 한글 터짐 방지 */
}

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

a {
  text-decoration: none;
  color: inherit;
}

ul, ol {
  list-style: none;
}

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

button {
  background: none;
  border: none;
  cursor: pointer;
  font-family: inherit;
  color: inherit;
}

h1, h2, h3, h4, h5, h6 {
  color: var(--color-primary);
  font-weight: var(--font-weight-bold);
  line-height: 1.3;
}

/* --- 3. Typography Utility --- */
.text-primary { color: var(--color-primary); }
.text-secondary { color: var(--color-secondary); }
.text-muted { color: var(--color-text-muted); }
.text-center { text-align: center; }

/* --- 4. Layout System --- */
.container {
  width: 100%;
  max-width: var(--container-width-max);
  margin: 0 auto;
  padding: 0 var(--spacing-4); /* 좌우 패딩 */
}

.section {
  padding: var(--spacing-12) 0;
}
.section-sm {
  padding: var(--spacing-8) 0;
}

/* --- 5. UI Components --- */
/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  z-index: 1000;
  border-bottom: 1px solid var(--color-border);
  transition: transform var(--transition-normal);
}

.header.hide-up {
  transform: translateY(-100%);
}

.header__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 100%;
}

.header__logo {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
}

.header__nav {
  display: flex;
  gap: var(--spacing-6);
}

.header__nav a {
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-base);
  color: var(--color-text-main);
  transition: color var(--transition-fast);
}

.header__nav a:hover, .header__nav a.active {
  color: var(--color-secondary);
}

/* Mobile Menu Button */
.header__menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 30px;
  height: 24px;
}

.header__menu-btn span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-primary);
  transition: var(--transition-normal);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-3) var(--spacing-6);
  border-radius: var(--radius-sm);
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-base);
  transition: all var(--transition-normal);
  text-align: center;
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-text-on-primary);
}
.btn-primary:hover {
  background-color: var(--color-primary-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background-color: var(--color-secondary);
  color: var(--color-text-on-primary);
}
.btn-secondary:hover {
  background-color: var(--color-secondary-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  background-color: transparent;
  border: 1px solid var(--color-primary);
  color: var(--color-primary);
}
.btn-outline:hover {
  background-color: var(--color-primary);
  color: var(--color-text-on-primary);
}

/* Floating CTA Bottom */
.floating-cta {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-3) var(--spacing-4);
  z-index: 999;
  display: flex;
  justify-content: center;
  align-items: center;
  box-shadow: 0 -2px 10px rgba(0,0,0,0.05);
}

.floating-cta .btn {
  width: 100%;
  max-width: 400px;
  border-radius: var(--radius-full);
}

/* Main Content Spacing */
main {
  flex: 1;
  padding-top: var(--header-height);
  padding-bottom: 80px; /* Floating CTA 공간 */
}

/* Footer */
.footer {
  background-color: var(--color-primary);
  color: var(--color-text-on-primary);
  padding: var(--spacing-8) 0;
}

.footer__inner {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-4);
}

.footer p {
  color: rgba(255, 255, 255, 0.7);
  font-size: var(--font-size-sm);
}

/* --- 6. Responsive Breakpoints --- */
@media (max-width: 768px) {
  :root {
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    --spacing-12: 4rem;
    --spacing-16: 6rem;
  }
  
  .header__nav {
    display: none; /* 모바일 메뉴 숨김 처리 (추후 JS로 토글) */
    position: absolute;
    top: var(--header-height);
    left: 0;
    width: 100%;
    background: var(--color-surface);
    flex-direction: column;
    padding: var(--spacing-4);
    box-shadow: var(--shadow-md);
    gap: var(--spacing-4);
  }
  
  .header__nav.active {
    display: flex;
  }
  
  .header__menu-btn {
    display: flex;
  }
}