/* ============================================
   벗츠(Buts) - Subscription Sharing Platform
   Common Styles
   ============================================ */

/* CSS Variables */
:root {
  --primary: #6C5CE7;
  --primary-dark: #5A4BD1;
  --primary-light: #A29BFE;
  --secondary: #00CEC9;
  --accent: #FD79A8;
  --danger: #E17055;
  --success: #00B894;
  --warning: #FDCB6E;
  --dark: #2D3436;
  --gray-900: #333333;
  --gray-800: #4A4A4A;
  --gray-700: #666666;
  --gray-600: #888888;
  --gray-500: #AAAAAA;
  --gray-400: #CCCCCC;
  --gray-300: #DDDDDD;
  --gray-200: #EEEEEE;
  --gray-100: #F5F5F5;
  --gray-50: #FAFAFA;
  --white: #FFFFFF;
  --bg: #F0F2F5;
  --card-bg: #FFFFFF;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
  --shadow-xl: 0 12px 40px rgba(0,0,0,0.15);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-full: 50%;
  --transition: all 0.3s ease;
  --max-width: 1200px;
  --header-height: 64px;
}

/* Reset */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans KR', 'Apple SD Gothic Neo', sans-serif;
  background: var(--bg);
  color: var(--dark);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
}

a:hover {
  color: var(--primary);
}

ul, ol {
  list-style: none;
}

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

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

button {
  cursor: pointer;
}

/* ============================================
   HEADER
   ============================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: var(--white);
  border-bottom: 1px solid var(--gray-200);
  z-index: 1000;
  display: flex;
  align-items: center;
}

.header-inner {
  max-width: var(--max-width);
  width: 100%;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: -0.5px;
}

.logo span {
  color: var(--secondary);
}

/* Nav */
.nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-link {
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--gray-700);
  transition: var(--transition);
  position: relative;
}

.nav-link:hover, .nav-link.active {
  color: var(--primary);
  background: rgba(108, 92, 231, 0.08);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 16px;
  right: 16px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
}

/* Header Right */
.header-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.search-toggle, .menu-toggle {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  color: var(--gray-700);
  font-size: 1.2rem;
  transition: var(--transition);
}

.search-toggle:hover, .menu-toggle:hover {
  background: var(--gray-100);
  color: var(--primary);
}

.btn-login {
  padding: 8px 20px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--gray-700);
  border: 1px solid var(--gray-300);
  transition: var(--transition);
}

.btn-login:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.btn-signup {
  padding: 8px 20px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--white);
  background: var(--primary);
  transition: var(--transition);
}

.btn-signup:hover {
  background: var(--primary-dark);
  color: var(--white);
}

/* ============================================
   MOBILE MENU
   ============================================ */
.mobile-menu {
  position: fixed;
  top: 0;
  right: -320px;
  width: 320px;
  height: 100vh;
  background: var(--white);
  z-index: 2000;
  transition: right 0.3s ease;
  overflow-y: auto;
  box-shadow: var(--shadow-xl);
}

.mobile-menu.open {
  right: 0;
}

.mobile-menu-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0,0,0,0.5);
  z-index: 1999;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
}

.mobile-menu-overlay.open {
  opacity: 1;
  visibility: visible;
}

.mobile-menu-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px;
  border-bottom: 1px solid var(--gray-200);
}

.mobile-menu-close {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  font-size: 1.2rem;
  color: var(--gray-700);
}

.mobile-menu-close:hover {
  background: var(--gray-100);
}

.mobile-menu-body {
  padding: 20px;
}

.mobile-menu-section {
  margin-bottom: 24px;
}

.mobile-menu-section h3 {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--gray-500);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 12px;
  padding: 0 12px;
}

.mobile-menu-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  color: var(--gray-800);
  transition: var(--transition);
}

.mobile-menu-item:hover {
  background: var(--gray-100);
  color: var(--primary);
}

.mobile-menu-item .icon {
  width: 20px;
  text-align: center;
}

.mobile-category-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 0 12px;
}

.mobile-tag {
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.8rem;
  background: var(--gray-100);
  color: var(--gray-700);
  transition: var(--transition);
}

.mobile-tag:hover {
  background: rgba(108, 92, 231, 0.1);
  color: var(--primary);
}

.mobile-menu-footer {
  padding: 20px;
  border-top: 1px solid var(--gray-200);
}

.mobile-menu-footer .btn-signup {
  width: 100%;
  padding: 12px;
  text-align: center;
  display: block;
}

/* ============================================
   SEARCH MODAL
   ============================================ */
.search-modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0,0,0,0.6);
  z-index: 3000;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 100px;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
}

.search-modal.open {
  opacity: 1;
  visibility: visible;
}

.search-modal-content {
  background: var(--white);
  border-radius: var(--radius-lg);
  width: 90%;
  max-width: 600px;
  padding: 24px;
  box-shadow: var(--shadow-xl);
  transform: translateY(-20px);
  transition: transform 0.3s ease;
}

.search-modal.open .search-modal-content {
  transform: translateY(0);
}

.search-input-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: var(--gray-100);
  border-radius: var(--radius-md);
  border: 2px solid transparent;
  transition: var(--transition);
}

.search-input-wrap:focus-within {
  border-color: var(--primary);
  background: var(--white);
}

.search-input-wrap .icon {
  font-size: 1.2rem;
  color: var(--gray-500);
}

.search-input-wrap input {
  flex: 1;
  font-size: 1rem;
  background: transparent;
}

.search-input-wrap input::placeholder {
  color: var(--gray-500);
}

.search-tags {
  margin-top: 16px;
}

.search-tags h4 {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--gray-500);
  margin-bottom: 10px;
}

.search-tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.search-tag {
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 0.8rem;
  background: var(--gray-100);
  color: var(--gray-700);
  transition: var(--transition);
  cursor: pointer;
}

.search-tag:hover {
  background: rgba(108, 92, 231, 0.1);
  color: var(--primary);
}

/* ============================================
   MAIN CONTENT
   ============================================ */
.main-content {
  margin-top: var(--header-height);
  min-height: calc(100vh - var(--header-height));
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 24px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  transition: var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: var(--primary);
  color: var(--white);
}

.btn-primary:hover {
  background: var(--primary-dark);
  color: var(--white);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background: var(--white);
  color: var(--gray-700);
  border: 1px solid var(--gray-300);
}

.btn-secondary:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.btn-accent {
  background: var(--secondary);
  color: var(--white);
}

.btn-accent:hover {
  background: #00B5B0;
  color: var(--white);
}

.btn-danger {
  background: var(--danger);
  color: var(--white);
}

.btn-success {
  background: var(--success);
  color: var(--white);
}

.btn-lg {
  padding: 14px 32px;
  font-size: 1rem;
  border-radius: var(--radius-md);
}

.btn-sm {
  padding: 6px 14px;
  font-size: 0.8rem;
}

.btn-block {
  width: 100%;
}

.btn-icon {
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: var(--radius-sm);
}

/* ============================================
   CARDS
   ============================================ */
.card {
  background: var(--card-bg);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

/* ============================================
   TAGS / BADGES
   ============================================ */
.tag {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  background: var(--gray-100);
  color: var(--gray-700);
}

.tag-primary {
  background: rgba(108, 92, 231, 0.1);
  color: var(--primary);
}

.tag-accent {
  background: rgba(0, 206, 201, 0.1);
  color: var(--secondary);
}

.tag-danger {
  background: rgba(225, 112, 85, 0.1);
  color: var(--danger);
}

.tag-success {
  background: rgba(0, 184, 148, 0.1);
  color: var(--success);
}

/* ============================================
   PAGINATION
   ============================================ */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  margin-top: 32px;
}

.pagination a, .pagination span {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 36px;
  padding: 0 8px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--gray-700);
  transition: var(--transition);
}

.pagination a:hover {
  background: var(--gray-100);
  color: var(--primary);
}

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

.pagination .disabled {
  color: var(--gray-400);
  pointer-events: none;
}

/* ============================================
   FORMS
   ============================================ */
.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--gray-800);
  margin-bottom: 8px;
}

.form-input {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  transition: var(--transition);
  background: var(--white);
}

.form-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(108, 92, 231, 0.1);
}

.form-input::placeholder {
  color: var(--gray-500);
}

.form-select {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  background: var(--white);
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23666' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  transition: var(--transition);
}

.form-select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(108, 92, 231, 0.1);
}

.form-textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  min-height: 120px;
  resize: vertical;
  transition: var(--transition);
}

.form-textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(108, 92, 231, 0.1);
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  background: var(--dark);
  color: var(--gray-400);
  padding: 40px 20px 24px;
  margin-top: 60px;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.footer-links {
  display: flex;
  gap: 24px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.footer-links a {
  font-size: 0.85rem;
  color: var(--gray-400);
}

.footer-links a:hover {
  color: var(--white);
}

.footer-links a.strong {
  font-weight: 700;
  color: var(--gray-300);
}

.footer-info {
  font-size: 0.8rem;
  line-height: 1.8;
  color: var(--gray-500);
}

.footer-info p {
  margin-bottom: 2px;
}

.footer-copyright {
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid rgba(255,255,255,0.1);
  font-size: 0.8rem;
  color: var(--gray-500);
}

.footer-notice {
  margin-top: 12px;
  font-size: 0.75rem;
  line-height: 1.7;
  color: var(--gray-500);
}

/* ============================================
   SECTION
   ============================================ */
.section {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.section-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--dark);
}

.section-more {
  font-size: 0.85rem;
  color: var(--gray-600);
  display: flex;
  align-items: center;
  gap: 4px;
}

.section-more:hover {
  color: var(--primary);
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
  .nav {
    display: none;
  }
  
  .btn-login, .btn-signup {
    display: none;
  }
  
  .search-toggle, .menu-toggle {
    display: flex;
  }
  
  .section {
    padding: 0 16px;
  }
  
  .footer {
    padding: 32px 16px 20px;
  }
}

@media (min-width: 769px) {
  .menu-toggle {
    display: none;
  }
}

/* ============================================
   UTILITIES
   ============================================ */
.text-center { text-align: center; }
.text-right { text-align: right; }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mt-32 { margin-top: 32px; }
.mb-8 { margin-bottom: 8px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.mb-32 { margin-bottom: 32px; }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.gap-8 { gap: 8px; }
.gap-12 { gap: 12px; }
.gap-16 { gap: 16px; }
.hidden { display: none !important; }