/* =============================================================================
   메인 CSS - 기본 스타일과 레이아웃
   ============================================================================= */

:root {
  /* 컬러 팔레트 - 골프장 테마 */
  --color-primary: #1e7b47;        /* 깊은 초록 */
  --color-primary-light: #2d8f59;  /* 밝은 초록 */
  --color-primary-dark: #155d37;   /* 어두운 초록 */
  --color-secondary: #c5a572;      /* 골드 */
  --color-secondary-light: #d4b582; /* 밝은 골드 */
  --color-accent: #2563eb;         /* 블루 액센트 */
  
  /* 상태 컬러 */
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-danger: #ef4444;
  --color-info: #3b82f6;
  
  /* 뉴트럴 컬러 */
  --color-white: #ffffff;
  --color-gray-50: #f9fafb;
  --color-gray-100: #f3f4f6;
  --color-gray-200: #e5e7eb;
  --color-gray-300: #d1d5db;
  --color-gray-400: #9ca3af;
  --color-gray-500: #6b7280;
  --color-gray-600: #4b5563;
  --color-gray-700: #374151;
  --color-gray-800: #1f2937;
  --color-gray-900: #111827;
  
  /* 그라데이션 */
  --gradient-primary: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  --gradient-secondary: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-secondary-light) 100%);
  --gradient-hero: linear-gradient(135deg, rgba(30, 123, 71, 0.9) 0%, rgba(45, 143, 89, 0.8) 100%);
  
  /* 타이포그래피 */
  --font-family: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;
  
  /* 간격 */
  --spacing-1: 0.25rem;
  --spacing-2: 0.5rem;
  --spacing-3: 0.75rem;
  --spacing-4: 1rem;
  --spacing-5: 1.25rem;
  --spacing-6: 1.5rem;
  --spacing-8: 2rem;
  --spacing-10: 2.5rem;
  --spacing-12: 3rem;
  --spacing-16: 4rem;
  --spacing-20: 5rem;
  --spacing-24: 6rem;
  
  /* 반지름 */
  --radius-sm: 0.125rem;
  --radius-base: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  --radius-2xl: 1rem;
  --radius-full: 9999px;
  
  /* 그림자 */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-base: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  
  /* 트랜지션 */
  --transition-fast: 150ms ease-in-out;
  --transition-base: 200ms ease-in-out;
  --transition-slow: 300ms ease-in-out;
  
  /* 높이 */
  --header-height: 80px;
  --nav-height: 70px;
}

/* =============================================================================
   리셋 및 기본 스타일
   ============================================================================= */

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-gray-800);
  background-color: var(--color-gray-50);
  overflow-x: hidden;
}

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

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

input, select, textarea {
  font-family: inherit;
  outline: none;
  border: none;
}

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

/* =============================================================================
   로딩 스피너
   ============================================================================= */

.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10000;
  transition: opacity var(--transition-slow), visibility var(--transition-slow);
}

.loading-overlay.hidden {
  opacity: 0;
  visibility: hidden;
}

.loading-spinner {
  text-align: center;
  color: var(--color-white);
}

.golf-ball {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: var(--color-white);
  margin: 0 auto var(--spacing-6);
  position: relative;
  animation: bounce 1.5s infinite ease-in-out;
}

.golf-ball::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 80%;
  height: 80%;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, rgba(0,0,0,0.1) 0%, transparent 70%);
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-20px); }
}

.loading-spinner p {
  font-size: var(--font-size-lg);
  font-weight: 500;
  opacity: 0.9;
}

/* =============================================================================
   메인 네비게이션
   ============================================================================= */

.main-nav {
  background: var(--color-white);
  border-bottom: 1px solid var(--color-gray-200);
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  box-shadow: var(--shadow-sm);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-height);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
}

.nav-logo {
  width: 40px;
  height: 40px;
}

.nav-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-primary);
}

.nav-menu {
  display: flex;
  gap: var(--spacing-2);
}

.nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-1);
  padding: var(--spacing-2) var(--spacing-4);
  border-radius: var(--radius-lg);
  color: var(--color-gray-600);
  transition: all var(--transition-base);
  font-size: var(--font-size-sm);
  font-weight: 500;
}

.nav-item:hover {
  color: var(--color-primary);
  background: var(--color-gray-50);
}

.nav-item.active {
  color: var(--color-primary);
  background: var(--color-primary);
  color: var(--color-white);
}

.nav-item i {
  width: 20px;
  height: 20px;
}

/* =============================================================================
   메인 컨테이너
   ============================================================================= */

.main-container {
  margin-top: var(--nav-height);
  min-height: calc(100vh - var(--nav-height));
}

.view-section {
  display: none;
  opacity: 0;
  transition: opacity var(--transition-base);
}

.view-section.active {
  display: block;
  opacity: 1;
}

.section-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-8) var(--spacing-6);
}

.section-title {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-2);
  text-align: center;
}

.section-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-gray-600);
  text-align: center;
  margin-bottom: var(--spacing-8);
}

/* =============================================================================
   히어로 섹션
   ============================================================================= */

.hero-section {
  background: var(--gradient-hero), url('https://images.unsplash.com/photo-1587174486073-ae5e5cec4f28?ixlib=rb-4.0.3&auto=format&fit=crop&w=1600&q=80');
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  min-height: 80vh;
  display: flex;
  align-items: center;
  position: relative;
}

.hero-content {
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  padding: 0 var(--spacing-6);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-12);
  align-items: center;
}

.hero-text {
  color: var(--color-white);
}

.hero-title {
  font-size: var(--font-size-5xl);
  font-weight: 700;
  margin-bottom: var(--spacing-4);
  line-height: 1.2;
}

.hero-subtitle {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-8);
  opacity: 0.9;
  line-height: 1.4;
}

.hero-features {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-4);
  margin-bottom: var(--spacing-8);
}

.feature-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
  font-size: var(--font-size-lg);
  font-weight: 500;
}

.feature-item i {
  width: 24px;
  height: 24px;
  color: var(--color-secondary);
}

.cta-button {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-2);
  background: var(--color-secondary);
  color: var(--color-white);
  padding: var(--spacing-4) var(--spacing-6);
  border-radius: var(--radius-xl);
  font-size: var(--font-size-lg);
  font-weight: 600;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-lg);
}

.cta-button:hover {
  background: var(--color-secondary-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl);
}

.hero-image {
  position: relative;
}

.hero-image img {
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-xl);
  width: 100%;
  height: auto;
}

/* =============================================================================
   룸 그리드
   ============================================================================= */

.room-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--spacing-6);
  margin-top: var(--spacing-8);
}

.room-card {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-base);
  transition: all var(--transition-base);
  border: 2px solid transparent;
}

.room-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.room-card.available {
  border-color: var(--color-success);
}

.room-card.occupied {
  border-color: var(--color-warning);
}

.room-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-4) var(--spacing-5);
  background: var(--color-gray-50);
}

.room-number {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-gray-800);
}

.room-status {
  padding: var(--spacing-1) var(--spacing-3);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 500;
}

.room-status.available {
  background: var(--color-success);
  color: var(--color-white);
}

.room-status.occupied {
  background: var(--color-warning);
  color: var(--color-white);
}

.room-image {
  position: relative;
  height: 200px;
  overflow: hidden;
}

.room-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.room-card:hover .room-image img {
  transform: scale(1.05);
}

.room-info {
  padding: var(--spacing-5);
}

.room-type {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-gray-800);
  margin-bottom: var(--spacing-2);
}

.room-price {
  font-size: var(--font-size-base);
  color: var(--color-primary);
  font-weight: 600;
  margin-bottom: var(--spacing-1);
}

.room-time {
  font-size: var(--font-size-sm);
  color: var(--color-warning);
  font-weight: 500;
}

.room-reserve-btn {
  width: 100%;
  padding: var(--spacing-3) var(--spacing-4);
  background: var(--color-primary);
  color: var(--color-white);
  border-radius: var(--radius-lg);
  font-weight: 600;
  margin-top: var(--spacing-4);
  transition: all var(--transition-base);
}

.room-reserve-btn:hover:not(:disabled) {
  background: var(--color-primary-dark);
  transform: translateY(-1px);
}

.room-reserve-btn:disabled {
  background: var(--color-gray-400);
  cursor: not-allowed;
}

/* =============================================================================
   시설 안내
   ============================================================================= */

.facilities-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-6);
  margin-top: var(--spacing-8);
}

.facility-card {
  background: var(--color-white);
  padding: var(--spacing-6);
  border-radius: var(--radius-xl);
  text-align: center;
  box-shadow: var(--shadow-base);
  transition: all var(--transition-base);
}

.facility-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.facility-icon {
  width: 80px;
  height: 80px;
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--spacing-4);
}

.facility-icon i {
  width: 40px;
  height: 40px;
  color: var(--color-white);
}

.facility-card h3 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--color-gray-800);
  margin-bottom: var(--spacing-3);
}

.facility-card p {
  color: var(--color-gray-600);
  line-height: 1.6;
}

/* =============================================================================
   반응형 디자인
   ============================================================================= */

@media (max-width: 768px) {
  .nav-container {
    padding: 0 var(--spacing-4);
  }
  
  .nav-menu {
    gap: var(--spacing-1);
  }
  
  .nav-item {
    padding: var(--spacing-2) var(--spacing-3);
    font-size: var(--font-size-xs);
  }
  
  .nav-item i {
    width: 16px;
    height: 16px;
  }
  
  .section-container {
    padding: var(--spacing-6) var(--spacing-4);
  }
  
  .hero-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-8);
    text-align: center;
  }
  
  .hero-title {
    font-size: var(--font-size-3xl);
  }
  
  .hero-subtitle {
    font-size: var(--font-size-lg);
  }
  
  .room-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-4);
  }
  
  .facilities-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-4);
  }
}

@media (max-width: 480px) {
  .section-title {
    font-size: var(--font-size-2xl);
  }
  
  .hero-title {
    font-size: var(--font-size-2xl);
  }
  
  .cta-button {
    font-size: var(--font-size-base);
    padding: var(--spacing-3) var(--spacing-5);
  }
}

/* =============================================================================
   데모 링크 스타일
   ============================================================================= */

/* 데모 링크 컨테이너 */
.demo-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-8);
    margin-bottom: var(--spacing-12);
}

/* 데모 링크 카드 */
.demo-link {
    background: var(--color-white);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-8);
    text-decoration: none;
    color: inherit;
    box-shadow: var(--shadow-lg);
    border: 2px solid transparent;
    transition: all 0.3s ease;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.demo-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.demo-link:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-2xl);
    border-color: var(--color-primary);
}

.demo-link:hover::before {
    transform: scaleX(1);
}

/* 향상된 데모 링크 */
.demo-link.enhanced {
    background: linear-gradient(135deg, #f0fdf4 0%, #ecfdf5 100%);
    border-color: var(--color-secondary);
}

.demo-link.enhanced::before {
    background: var(--gradient-secondary);
}

.demo-link.enhanced:hover {
    border-color: var(--color-secondary);
    box-shadow: 0 8px 25px rgba(197, 165, 114, 0.3);
}

/* 데모 아이콘 */
.demo-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-4);
    color: var(--color-primary);
    display: block;
}

.demo-link.enhanced .demo-icon {
    color: var(--color-secondary);
}

/* 데모 텍스트 */
.demo-link h3 {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-3);
}

.demo-link p {
    color: var(--color-gray-600);
    font-size: var(--font-size-base);
    line-height: 1.6;
}

/* 데모 구분자 */
.demo-separator {
    text-align: center;
    margin: var(--spacing-12) 0 var(--spacing-8) 0;
    padding: var(--spacing-8) 0;
    border-top: 1px solid var(--color-gray-200);
    border-bottom: 1px solid var(--color-gray-200);
    background: var(--color-gray-50);
    border-radius: var(--border-radius-md);
}

.demo-separator h3 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-4);
    font-size: var(--font-size-xl);
    font-weight: 700;
}

.demo-separator p {
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-8);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.6;
}

/* 반응형 데모 링크 */
@media (max-width: 768px) {
    .demo-links {
        grid-template-columns: 1fr;
        gap: var(--spacing-6);
    }
    
    .demo-link {
        padding: var(--spacing-6);
    }
    
    .demo-icon {
        font-size: 2.5rem;
    }
    
    .demo-link h3 {
        font-size: var(--font-size-lg);
    }
    
    .demo-separator {
        margin: var(--spacing-8) 0 var(--spacing-6) 0;
        padding: var(--spacing-6) 0;
    }
}