/* ============================================
   WMC Website - Shared Stylesheet
   ============================================ */

/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600&family=Noto+Serif+KR:wght@300;400;600;700;900&family=Dancing+Script:wght@700&display=swap');

/* --- CSS Custom Properties (Design Tokens) --- */
:root {
  /* Colors */
  --color-bg-dark: #111111;
  --color-bg-darker: #0a0a0a;
  --color-bg-card: #222222;
  --color-gold: #c5a059;
  --color-gold-light: #e6c37d;
  --color-text: #f3f4f6;
  --color-muted: #888888;
  --color-border: rgba(255, 255, 255, 0.1);

  /* Light theme */
  --color-bg-light: #f8f8f6;
  --color-navy: #1e293b;
  --color-slate-text: #1e293b;

  /* Typography */
  --font-sans: 'Inter', sans-serif;
  --font-serif: 'Noto Serif KR', serif;

  /* Spacing */
  --section-padding: 8rem 0;

  /* Transitions */
  --transition-base: all 0.3s ease;
  --transition-smooth: all 0.5s cubic-bezier(0.77, 0, 0.175, 1);
  --transition-spring: all 1s cubic-bezier(0.5, 0, 0, 1);
}

/* --- Base Reset & Body --- */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* --- Custom Scrollbar (Dark Theme) --- */
.dark-theme ::-webkit-scrollbar { width: 6px; }
.dark-theme ::-webkit-scrollbar-track { background: var(--color-bg-dark); }
.dark-theme ::-webkit-scrollbar-thumb { background: #333; border-radius: 3px; }
.dark-theme ::-webkit-scrollbar-thumb:hover { background: var(--color-gold); }

/* --- Navigation Shared Styles --- */
.wmc-nav {
  position: fixed;
  width: 100%;
  z-index: 50;
  transition: var(--transition-base);
}

.wmc-nav.scrolled {
  background-color: var(--color-bg-dark);
  box-shadow: 0 4px 20px rgba(0,0,0,0.3);
  padding-top: 1rem;
  padding-bottom: 1rem;
}

/* --- Gold Text Gradient --- */
.text-gold-gradient {
  background: linear-gradient(to right, var(--color-gold), var(--color-gold-light));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* --- Hover Underline Animation --- */
.hover-underline {
  display: inline-block;
  position: relative;
}

.hover-underline::after {
  content: '';
  position: absolute;
  width: 100%;
  transform: scaleX(0);
  height: 1px;
  bottom: 0;
  left: 0;
  background-color: var(--color-gold);
  transform-origin: bottom right;
  transition: transform 0.4s cubic-bezier(0.86, 0, 0.07, 1);
}

.hover-underline:hover::after {
  transform: scaleX(1);
  transform-origin: bottom left;
}

/* --- Scroll Reveal Animation --- */
.scroll-reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 1s cubic-bezier(0.5, 0, 0, 1), transform 1s cubic-bezier(0.5, 0, 0, 1);
}

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

.scroll-reveal.delay-1 { transition-delay: 100ms; }
.scroll-reveal.delay-2 { transition-delay: 200ms; }
.scroll-reveal.delay-3 { transition-delay: 300ms; }
.scroll-reveal.delay-4 { transition-delay: 400ms; }

/* --- Company Card Shared Styles --- */
.company-card {
  transition: background-color 0.7s ease, border-color 0.3s ease;
}

.company-card:hover .company-logo-img {
  transform: scale(1.05);
  border-color: var(--color-gold);
}

.company-card:hover .company-title {
  color: var(--color-gold);
}

/* --- Modal Styles --- */
.modal-backdrop {
  opacity: 0;
  visibility: hidden;
  transition: var(--transition-smooth);
}

.modal-backdrop.active {
  opacity: 1;
  visibility: visible;
}

.modal-content {
  transform: translateY(50px);
  opacity: 0;
  transition: var(--transition-smooth);
  transition-delay: 0.1s;
}

.modal-backdrop.active .modal-content {
  transform: translateY(0);
  opacity: 1;
}

/* --- PDF Viewer Overlay --- */
.pdf-viewer-overlay {
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
}

.pdf-viewer-overlay.active {
  opacity: 1;
  visibility: visible;
}

/* --- Mobile Menu --- */
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 100;
  transform: translateX(100%);
  transition: transform 0.3s ease-in-out;
}

.mobile-menu.open {
  transform: translateX(0);
}

/* --- Fade-in-up keyframe --- */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(40px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes revealUp {
  from { transform: translateY(100%); }
  to   { transform: translateY(0); }
}

@keyframes videoFadeIn {
  from { opacity: 0; transform: scale(1.1); }
  to   { opacity: 0.9; transform: scale(1); }
}

/* --- Utility: Reveal text container --- */
.reveal-text-container {
  overflow: hidden;
  display: block;
}

/* --- Arrow bounce animation (index.html) --- */
@keyframes arrow-bounce {
  0%, 100% { transform: translateX(0); }
  50%       { transform: translateX(5px); }
}

.arrow-indicator {
  position: absolute;
  bottom: 24px;
  right: 24px;
  width: 12px;
  height: 12px;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: arrow-bounce 1.5s infinite ease-in-out;
}

/* --- Responsive helpers --- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}