/* ===============================================
   뜸 연기학원 - Design 3: Luxury Black & Gold
   Elegant, refined, premium aesthetic
   =============================================== */

/* ===== CSS Variables ===== */
:root {
  --color-black: #050505;
  --color-black-light: #0f0f0f;
  --color-black-lighter: #181818;
  --color-gold: #c9a227;
  --color-gold-light: #dbb84d;
  --color-gold-dark: #a68415;
  --color-champagne: #f7e7ce;
  --color-white: #ffffff;
  --color-gray: #707070;
  --color-gray-light: #a0a0a0;
  --color-gray-dark: #3a3a3a;
  --color-border: #252525;

  --font-main: 'Pretendard', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  --font-display: 'Montserrat', var(--font-main);

  --header-height: 88px;
  --header-height-mobile: 68px;
  --container-width: 1200px;
  --transition: 0.4s cubic-bezier(0.25, 0.1, 0.25, 1);
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-main);
  background: var(--color-black);
  color: var(--color-white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

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

ul, ol {
  list-style: none;
}

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

/* ===== Container ===== */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Header ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: linear-gradient(180deg, rgba(5, 5, 5, 0.98), rgba(5, 5, 5, 0.95));
  backdrop-filter: blur(30px);
  -webkit-backdrop-filter: blur(30px);
  border-bottom: 1px solid rgba(201, 162, 39, 0.1);
  z-index: 1000;
}

.header-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
}

.logo-img {
  height: 50px;
  width: auto;
}

/* Navigation */
.nav {
  display: flex;
  gap: 0;
}

.nav-item {
  position: relative;
}

.nav-link {
  display: block;
  padding: 14px 22px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--color-gray-light);
  transition: all var(--transition);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 8px;
  left: 22px;
  right: 22px;
  height: 1px;
  background: var(--color-gold);
  transform: scaleX(0);
  transition: transform var(--transition);
}

.nav-link:hover {
  color: var(--color-white);
}

.nav-link:hover::after {
  transform: scaleX(1);
}

.nav-link.active {
  color: var(--color-gold);
}

.nav-link.active::after {
  transform: scaleX(1);
}

/* Dropdown */
.dropdown {
  position: absolute;
  top: calc(100% + 12px);
  left: 50%;
  transform: translateX(-50%);
  min-width: 200px;
  background: var(--color-black-light);
  border: 1px solid rgba(201, 162, 39, 0.15);
  border-radius: var(--radius-md);
  padding: 12px 8px;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition);
  box-shadow: 0 30px 60px rgba(0,0,0,0.7);
}

.nav-item:hover .dropdown {
  opacity: 1;
  visibility: visible;
}

.dropdown-link {
  display: block;
  padding: 14px 20px;
  font-size: 14px;
  color: var(--color-gray-light);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  text-align: center;
}

.dropdown-link:hover {
  background: rgba(201, 162, 39, 0.08);
  color: var(--color-gold);
}

/* Mobile menu toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  width: 26px;
  padding: 4px 0;
}

.menu-toggle span {
  width: 100%;
  height: 1px;
  background: var(--color-gold);
  transition: var(--transition);
}

/* ===== Hero Section ===== */
.hero {
  margin-top: var(--header-height);
  position: relative;
  width: 100%;
  overflow: hidden;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 100px;
  background: linear-gradient(transparent, var(--color-black));
  pointer-events: none;
}

.hero-banner {
  width: 100%;
  height: auto;
  display: block;
}

/* ===== Section Common ===== */
.section {
  padding: 120px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 70px;
}

.section-eyebrow {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.35em;
  color: var(--color-gold);
  text-transform: uppercase;
  margin-bottom: 20px;
  position: relative;
}

.section-eyebrow::before,
.section-eyebrow::after {
  content: '';
  position: absolute;
  top: 50%;
  width: 40px;
  height: 1px;
  background: linear-gradient(90deg, var(--color-gold), transparent);
}

.section-eyebrow::before {
  right: calc(100% + 16px);
}

.section-eyebrow::after {
  left: calc(100% + 16px);
  background: linear-gradient(90deg, transparent, var(--color-gold));
}

.section-title {
  font-size: clamp(32px, 4.5vw, 48px);
  font-weight: 300;
  color: var(--color-white);
  margin-bottom: 18px;
  letter-spacing: -0.02em;
}

.section-title strong {
  font-weight: 800;
}

.section-desc {
  font-size: 15px;
  color: var(--color-gray);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.8;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 18px 44px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border-radius: 2px;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--color-gold);
  color: var(--color-black);
  border: 1px solid var(--color-gold);
}

.btn-primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent 50%, rgba(255,255,255,0.2) 50%);
  transform: translateX(-100%);
  transition: transform var(--transition);
}

.btn-primary:hover {
  box-shadow: 0 15px 40px rgba(201, 162, 39, 0.3);
}

.btn-primary:hover::before {
  transform: translateX(0);
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--color-gold);
  color: var(--color-gold);
}

.btn-outline:hover {
  background: var(--color-gold);
  color: var(--color-black);
}

/* ===== Cards ===== */
.card {
  background: var(--color-black-light);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition);
}

.card:hover {
  border-color: rgba(201, 162, 39, 0.25);
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.5);
}

/* ===== Page Header ===== */
.page-header {
  margin-top: var(--header-height);
  padding: 120px 0 100px;
  background: var(--color-black);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 1px;
  height: 60px;
  background: linear-gradient(var(--color-gold), transparent);
}

.page-header::after {
  content: '';
  position: absolute;
  top: 40%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 400px;
  height: 400px;
  background: radial-gradient(ellipse, rgba(201, 162, 39, 0.03), transparent 60%);
  pointer-events: none;
}

.page-title {
  font-size: clamp(36px, 6vw, 56px);
  font-weight: 300;
  color: var(--color-white);
  margin-bottom: 16px;
  margin-top: 40px;
  position: relative;
  letter-spacing: 0.05em;
}

.page-breadcrumb {
  font-size: 12px;
  color: var(--color-gray);
  letter-spacing: 0.1em;
  position: relative;
}

.page-breadcrumb a:hover {
  color: var(--color-gold);
}

/* ===== Footer ===== */
.footer {
  background: var(--color-black-light);
  border-top: 1px solid rgba(201, 162, 39, 0.1);
  padding: 80px 0 40px;
}

.footer-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding-bottom: 50px;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 40px;
}

.footer-logo-img {
  height: 50px;
  margin-bottom: 24px;
  opacity: 0.9;
}

.footer-info {
  font-size: 13px;
  color: var(--color-gray);
  line-height: 2;
  letter-spacing: 0.02em;
}

.footer-info strong {
  color: var(--color-white);
  font-weight: 600;
}

.footer-contact {
  text-align: right;
}

.footer-phone {
  font-size: 26px;
  font-weight: 300;
  color: var(--color-gold);
  margin-bottom: 10px;
  letter-spacing: 0.05em;
}

.footer-hours {
  font-size: 13px;
  color: var(--color-gray);
  letter-spacing: 0.05em;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  color: var(--color-gray-dark);
  letter-spacing: 0.05em;
}

.footer-links a {
  margin-left: 24px;
  color: var(--color-gray);
}

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

/* ===== Mobile Navigation ===== */
.mobile-nav {
  display: none;
  position: fixed;
  top: var(--header-height-mobile);
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-black);
  padding: 30px;
  z-index: 999;
  overflow-y: auto;
}

.mobile-nav.active {
  display: block;
}

.mobile-nav-link {
  display: block;
  padding: 20px 0;
  font-size: 16px;
  font-weight: 400;
  letter-spacing: 0.05em;
  color: var(--color-white);
  border-bottom: 1px solid var(--color-border);
}

.mobile-dropdown {
  display: none;
  padding-left: 24px;
}

.mobile-nav-item.active .mobile-dropdown {
  display: block;
}

.mobile-dropdown-link {
  display: block;
  padding: 16px 0;
  font-size: 14px;
  color: var(--color-gray);
}

/* ===== Responsive ===== */
@media (max-width: 991px) {
  .nav {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }

  .header {
    height: var(--header-height-mobile);
  }

  .hero,
  .page-header {
    margin-top: var(--header-height-mobile);
  }

  .section {
    padding: 80px 0;
  }

  .footer-top {
    flex-direction: column;
    gap: 40px;
  }

  .footer-contact {
    text-align: left;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 20px;
    text-align: center;
  }

  .footer-links a {
    margin: 0 12px;
  }
}

/* ===== Scroll Animations ===== */
.scroll-animate {
  opacity: 0;
  transform: translateY(50px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.scroll-animate.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== Loading States ===== */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 60px;
  color: var(--color-gray);
}

.loading::after {
  content: '';
  width: 20px;
  height: 20px;
  border: 1px solid var(--color-gold);
  border-top-color: transparent;
  border-radius: 50%;
  margin-left: 12px;
  animation: spin 1.2s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ===== Gold Line Decorations ===== */
.gold-line {
  width: 60px;
  height: 1px;
  background: var(--color-gold);
  margin: 30px auto;
}

.gold-line-vertical {
  width: 1px;
  height: 60px;
  background: linear-gradient(var(--color-gold), transparent);
  margin: 0 auto 30px;
}