/* ===== LEYU Site Kit Shared CSS ===== */

/* Reset & Variables */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body { min-height: 100vh; }
img, video, svg { max-width: 100%; display: block; }
ul, ol { list-style: none; }
button, input, optgroup, select, textarea { font: inherit; color: inherit; background: none; border: none; }
[hidden] { display: none !important; }

:root {
  --color-base: #F7F3E8;
  --color-moss: #5A6B46;
  --color-terracotta: #C4653A;
  --color-deepblue: #1E3A5F;
  --color-red: #E6392D;
  --color-orange: #F67B2E;
  --color-neon: #B6E02F;
  --color-graphite: #2B2B2B;
  --color-stone: #5C5B57;
  --color-white: #FFFFFF;

  --font-display: "Arial Black", "Impact", "Oswald", "DIN Alternate", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Inter", "Noto Sans SC", "Microsoft YaHei", "PingFang SC", sans-serif;
  --font-mono: "JetBrains Mono", "Cascadia Mono", Consolas, ui-monospace, monospace;

  --shadow-hard: 6px 6px 0 rgba(43,43,43,0.15);
  --shadow-neon: 4px 4px 0 var(--color-neon);
  --border-hard: 2px solid var(--color-graphite);
  --container-pad: 1.25rem;
  --container: 1440px;
}

/* Base & Typography */
body {
  font-family: var(--font-body);
  background-color: var(--color-base);
  color: var(--color-graphite);
  line-height: 1.7;
}
a {
  color: var(--color-moss);
  text-decoration-thickness: 2px;
  text-underline-offset: 2px;
}
a:hover { color: var(--color-terracotta); }
p { margin: 0; }
:focus-visible { outline: 3px solid var(--color-neon); outline-offset: 2px; }
#main-content { scroll-margin-top: 5rem; }

/* Container */
.container {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}
@media (min-width: 768px) {
  :root { --container-pad: 2rem; }
}

/* Section */
.section { padding-block: 3rem; }
.section--tight { padding-block: 2rem; }
.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 900;
  line-height: 1.1;
  text-transform: uppercase;
  color: var(--color-graphite);
  margin-bottom: 1rem;
  position: relative;
  display: inline-block;
}
.section-title::after {
  content: "";
  display: block;
  width: 100%;
  height: 4px;
  background: var(--color-terracotta);
  margin-top: 0.25rem;
}
.section-subtitle {
  color: var(--color-stone);
  max-width: 60ch;
  margin-bottom: 1.5rem;
}

/* Grid */
.grid { display: grid; gap: 1.5rem; }
.grid--2, .grid--3 { grid-template-columns: 1fr; }
@media (min-width: 768px) { .grid--2 { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .grid--3 { grid-template-columns: repeat(3, 1fr); } }

/* Card */
.card {
  background: var(--color-white);
  border: var(--border-hard);
  box-shadow: var(--shadow-hard);
}
.card-body { padding: 1.25rem; }
.card-title {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
  line-height: 1.2;
}

/* Button */
.btn {
  display: inline-block;
  border: 2px solid var(--color-graphite);
  box-shadow: var(--shadow-hard);
  padding: 0.75rem 1.25rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 0.9rem;
  cursor: pointer;
  text-decoration: none;
  background: var(--color-graphite);
  color: var(--color-white);
  transition: transform 0.15s, box-shadow 0.15s, background 0.15s;
}
.btn:hover { transform: translate(-2px, -2px); box-shadow: 8px 8px 0 var(--color-graphite); }
.btn-primary { background: var(--color-terracotta); border-color: var(--color-graphite); box-shadow: 4px 4px 0 var(--color-graphite); }
.btn-primary:hover { box-shadow: 8px 8px 0 var(--color-graphite); }
.btn-outline { background: transparent; color: var(--color-graphite); }
.btn-outline:hover { background: var(--color-neon); color: var(--color-graphite); }
.btn-neon { background: var(--color-neon); color: var(--color-graphite); }

/* Badge */
.badge {
  display: inline-block;
  padding: 0.25em 0.6em;
  border: 1px solid var(--color-graphite);
  background: var(--color-orange);
  color: var(--color-graphite);
  font-weight: 700;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.badge--red { background: var(--color-red); color: #fff; }
.badge--neon { background: var(--color-neon); color: var(--color-graphite); }
.badge--moss { background: var(--color-moss); color: #fff; }

/* Breadcrumbs */
.breadcrumbs { font-size: 0.85rem; padding-block: 1rem 0; }
.breadcrumbs ol { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.breadcrumbs a { text-decoration: none; }
.breadcrumbs li + li::before { content: "/"; margin-right: 0.5rem; color: var(--color-stone); }

/* Media Placeholders */
.media {
  position: relative;
  display: block;
  overflow: hidden;
  background: var(--color-stone);
}
.media--16-9 { aspect-ratio: 16 / 9; }
.media--4-3 { aspect-ratio: 4 / 3; }
.media img, .media video { width: 100%; height: 100%; object-fit: cover; }
.media-placeholder {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  background: var(--color-deepblue);
  color: var(--color-neon);
  font-family: var(--font-mono);
}
.media-placeholder::before {
  content: "";
  width: 2rem;
  height: 2rem;
  border: 2px solid var(--color-neon);
  transform: rotate(45deg);
}

/* Skip Link */
.skip-link {
  position: absolute;
  top: -200%;
  left: 0.75rem;
  z-index: 200;
  background: var(--color-neon);
  color: var(--color-graphite);
  padding: 0.75rem 1rem;
  font-weight: 700;
  border: 2px solid var(--color-graphite);
  box-shadow: var(--shadow-neon);
  transition: top 0.2s;
}
.skip-link:focus { top: 0.75rem; }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  background: var(--color-base);
  border-bottom: 3px solid var(--color-graphite);
  box-shadow: 0 4px 0 rgba(43, 43, 43, 0.08);
  z-index: 100;
}
.header-inner {
  max-width: var(--container);
  margin-inline: auto;
  padding: 0.75rem var(--container-pad);
  min-height: 4rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.brand {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  text-decoration: none;
  line-height: 1;
}
.brand-mark {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.75rem;
  color: var(--color-graphite);
  text-transform: uppercase;
  letter-spacing: -0.02em;
}
.brand-caption {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.7rem;
  color: var(--color-moss);
  text-transform: uppercase;
  letter-spacing: 0.14em;
}

/* Nav Toggle */
.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  border: 2px solid var(--color-graphite);
  padding: 0.5rem 0.75rem;
  cursor: pointer;
  color: var(--color-graphite);
  font-weight: 700;
  font-size: 0.8rem;
  text-transform: uppercase;
  font-family: var(--font-body);
  background: var(--color-base);
  box-shadow: 3px 3px 0 rgba(43, 43, 43, 0.15);
}
.nav-toggle-box {
  width: 22px;
  height: 14px;
  position: relative;
  display: inline-block;
}
.nav-toggle-box span,
.nav-toggle-box span::before,
.nav-toggle-box span::after {
  content: "";
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: currentColor;
  display: block;
  transition: transform 0.2s, top 0.2s, background 0.2s;
}
.nav-toggle-box span { top: 50%; transform: translateY(-50%); }
.nav-toggle-box span::before { top: -6px; }
.nav-toggle-box span::after { top: 6px; }
body.nav-open .nav-toggle-box span { background: transparent; }
body.nav-open .nav-toggle-box span::before { top: 0; transform: rotate(45deg); }
body.nav-open .nav-toggle-box span::after { top: 0; transform: rotate(-45deg); }
.nav-toggle-label { line-height: 1; }

/* Site Nav */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: min(80vw, 320px);
  background: var(--color-graphite);
  color: var(--color-white);
  padding: 4.5rem 1.5rem 1.5rem;
  transform: translateX(-100%);
  transition: transform 0.25s ease;
  z-index: 120;
  overflow-y: auto;
}
.site-nav[data-open] { transform: translateX(0); box-shadow: 6px 0 0 var(--color-neon); }
.nav-list li + li { border-top: 1px solid rgba(255, 255, 255, 0.15); }
.nav-list a {
  display: block;
  padding: 0.75rem 0.25rem;
  color: var(--color-white);
  font-weight: 700;
  font-size: 1.1rem;
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  transition: color 0.15s, padding-left 0.15s;
}
.nav-list a:hover,
.nav-list a:focus-visible { color: var(--color-neon); padding-left: 0.5rem; }
.nav-list a[aria-current="page"] {
  color: var(--color-neon);
  border-left: 4px solid var(--color-neon);
  padding-left: 0.75rem;
}

/* Nav Scrim */
.nav-scrim {
  position: fixed;
  inset: 0;
  background: rgba(43, 43, 43, 0.45);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s;
  z-index: 110;
}
body.nav-open .nav-scrim { opacity: 1; pointer-events: auto; }

/* Scroll Progress */
.scroll-progress {
  position: absolute;
  left: 0;
  bottom: 0;
  height: 3px;
  width: 100%;
  background: var(--color-neon);
  transform: scaleX(0);
  transform-origin: left;
  pointer-events: none;
  z-index: 130;
}

/* Desktop Nav */
@media (min-width: 768px) {
  .nav-toggle { display: none; }
  .site-nav {
    position: static;
    width: auto;
    transform: none;
    background: transparent;
    color: var(--color-graphite);
    padding: 0;
    box-shadow: none;
    overflow: visible;
  }
  .site-nav[data-open] { box-shadow: none; }
  .nav-list { display: flex; align-items: center; gap: 0.25rem; }
  .nav-list li + li { border-top: 0; }
  .nav-list a {
    padding: 0.6rem 0.8rem;
    font-size: 0.85rem;
    color: var(--color-graphite);
    border-left: 0;
    position: relative;
  }
  .nav-list a::after {
    content: "";
    position: absolute;
    left: 0.6rem;
    right: 0.6rem;
    bottom: 0.2rem;
    height: 2px;
    background: var(--color-neon);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.2s;
  }
  .nav-list a:hover { padding-left: 0.8rem; color: var(--color-graphite); }
  .nav-list a:hover::after { transform: scaleX(1); }
  .nav-list a[aria-current="page"] {
    background: var(--color-graphite);
    color: var(--color-neon);
    padding-left: 0.8rem;
  }
  .nav-list a[aria-current="page"]::after { transform: scaleX(0); }
  .nav-scrim { display: none; }
}

/* Footer */
.site-footer {
  background: var(--color-graphite);
  color: rgba(255, 255, 255, 0.8);
  border-top: 4px solid var(--color-neon);
}
.footer-inner {
  max-width: var(--container);
  margin-inline: auto;
  padding: 3rem var(--container-pad) 1.5rem;
  display: grid;
  gap: 2.5rem;
  grid-template-columns: 1fr;
}
.footer-title {
  color: var(--color-neon);
  font-family: var(--font-display);
  font-size: 1.15rem;
  text-transform: uppercase;
  margin-bottom: 1rem;
}
.footer-logo {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 2rem;
  color: #fff;
  letter-spacing: -0.02em;
  line-height: 1;
}
.footer-tagline {
  color: var(--color-neon);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.9rem;
  margin-top: 0.5rem;
}
.footer-desc {
  margin-top: 1rem;
  font-size: 0.9rem;
  line-height: 1.6;
  max-width: 46ch;
  color: rgba(255, 255, 255, 0.7);
}
.footer-icp {
  margin-top: 1rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.5);
}
.footer-links ul { list-style: none; }
.footer-links li { margin-bottom: 0.5rem; }
.footer-links a,
.footer-contact a {
  color: #fff;
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
.footer-links a:hover,
.footer-contact a:hover {
  color: var(--color-neon);
  border-bottom-color: var(--color-neon);
}
.footer-contact p { margin-bottom: 0.5rem; font-size: 0.9rem; }
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  padding: 1rem var(--container-pad);
  text-align: center;
}
.footer-copy { font-size: 0.8rem; color: rgba(255, 255, 255, 0.5); }

@media (min-width: 768px) {
  .footer-inner { grid-template-columns: 2fr 1fr 1.5fr; gap: 2rem; }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
  }
}