/* ===== MF Studio — Simplified Rebuild ===== */

/* ---- Design Tokens ---- */
:root,
[data-theme='light'] {
  /* Surfaces — black/white/grey identity */
  --color-bg: #ffffff;
  --color-surface: #f5f5f5;
  --color-surface-2: #ebebeb;
  --color-surface-offset: #e0e0e0;
  --color-divider: #d0d0d0;
  --color-border: #c0c0c0;

  /* Text */
  --color-text: #111111;
  --color-text-muted: #555555;
  --color-text-faint: #999999;
  --color-text-inverse: #ffffff;

  /* Accent — signature yellow */
  --accent: #ffd60a;
  --accent-hover: #f5c700;
  --accent-soft: rgba(255, 214, 10, 0.15);

  /* Dark sections */
  --color-dark-bg: #0a0a0a;
  --color-dark-surface: #161616;
  --color-dark-border: #2a2a2a;

  /* Fonts */
  --font-display: 'Clash Display', 'Helvetica Neue', sans-serif;
  --font-body: 'Satoshi', 'Helvetica Neue', Arial, sans-serif;

  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1.25rem;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Type Scale */
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl: clamp(2rem, 1.2rem + 2.5vw, 3.5rem);
  --text-3xl: clamp(2.5rem, 1rem + 4vw, 5rem);
  --text-hero: clamp(3rem, 0.5rem + 7vw, 8rem);

  /* Transitions */
  --transition: 200ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.12);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.16);

  /* Content widths */
  --content-default: 960px;
  --content-wide: 1200px;

  /* Nav height */
  --nav-h: 64px;
}

/* DARK MODE */
[data-theme='dark'] {
  --color-bg: #0a0a0a;
  --color-surface: #161616;
  --color-surface-2: #1c1c1c;
  --color-surface-offset: #222222;
  --color-divider: #2a2a2a;
  --color-border: #333333;

  --color-text: #f0f0f0;
  --color-text-muted: #a0a0a0;
  --color-text-faint: #666666;
  --color-text-inverse: #0a0a0a;

  --accent: #ffd60a;
  --accent-hover: #ffe533;
  --accent-soft: rgba(255, 214, 10, 0.1);

  --color-dark-bg: #050505;
  --color-dark-surface: #0f0f0f;
  --color-dark-border: #1a1a1a;

  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.5);
}

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

html {
  -webkit-text-size-adjust: none;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-h);
}

body {
  min-height: 100dvh;
  line-height: 1.6;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
}

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

ul[role='list'], ol[role='list'] { list-style: none; }

a { color: inherit; text-decoration: none; }
a, button { transition: color var(--transition), background var(--transition), border-color var(--transition), opacity var(--transition); }

h1, h2, h3, h4 { text-wrap: balance; line-height: 1.15; }
p, li { text-wrap: pretty; }

::selection { background: var(--accent); color: #000; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: var(--radius-sm); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ---- Header / Nav ---- */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--nav-h);
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-divider);
}

.header__inner {
  max-width: var(--content-wide);
  height: 100%;
  margin: 0 auto;
  padding: 0 var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-text);
}

.logo__mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px; height: 32px;
  background: var(--color-text);
  color: var(--accent);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}

.logo__text {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 600;
  letter-spacing: 0.02em;
}

.nav { display: flex; }

.nav__list {
  display: flex;
  list-style: none;
  gap: var(--space-8);
  margin: 0;
  padding: 0;
}

.nav__link {
  font-size: var(--text-sm);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
  position: relative;
  padding: var(--space-1) 0;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -2px; left: 0;
  width: 0; height: 2px;
  background: var(--accent);
  transition: width var(--transition);
}

.nav__link:hover { color: var(--color-text); }
.nav__link:hover::after { width: 100%; }

/* Theme toggle */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px; height: 36px;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  color: var(--color-text-muted);
  flex-shrink: 0;
}
.theme-toggle:hover { color: var(--color-text); border-color: var(--accent); }

/* Mobile menu toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 36px; height: 36px;
  justify-content: center;
  align-items: center;
  background: none;
  border: none;
  cursor: pointer;
}
.menu-toggle span {
  display: block;
  width: 22px; height: 2px;
  background: var(--color-text);
  transition: transform var(--transition), opacity var(--transition);
}
.menu-toggle[aria-expanded='true'] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle[aria-expanded='true'] span:nth-child(2) { opacity: 0; }
.menu-toggle[aria-expanded='true'] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---- Hero ---- */
.hero {
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  position: relative;
  overflow: hidden;
  padding: var(--space-32) var(--space-6) var(--space-20);
  margin-top: 0;
}

/* Mosaic background grid */
.hero__bg-grid {
  position: absolute;
  inset: 0;
  background-color: var(--color-bg);
  background-image:
    linear-gradient(var(--color-surface-2) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-surface-2) 1px, transparent 1px);
  background-size: 80px 80px;
  opacity: 0.5;
  z-index: 0;
}

/* Asymmetric mosaic blocks — decorative accent squares */
.hero__bg-grid::before {
  content: '';
  position: absolute;
  top: 8%; left: 4%;
  width: 60px; height: 60px;
  background: var(--accent);
  opacity: 0.3;
  z-index: 0;
}
.hero__bg-grid::after {
  content: '';
  position: absolute;
  bottom: 12%; right: 6%;
  width: 80px; height: 80px;
  background: var(--color-text);
  opacity: 0.04;
  z-index: 0;
}

.hero__content {
  position: relative;
  z-index: 1;
  max-width: 720px;
}

.hero__logo-mark {
  margin: 0 auto var(--space-6);
  width: clamp(120px, 20vw, 180px);
  color: var(--color-text);
}

.hero__title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  margin-bottom: var(--space-4);
}

.hero__tagline {
  font-size: var(--text-sm);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-6);
}

.hero__sub {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 56ch;
  margin: 0 auto var(--space-8);
}

/* Sticky note accent */
.hero__sticky-note {
  display: inline-block;
  background: var(--accent);
  color: #000;
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-sm);
  font-weight: 600;
  transform: rotate(-2deg);
  box-shadow: var(--shadow-md);
  border-radius: 2px;
}

.hero__scroll-hint {
  position: absolute;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-faint);
  z-index: 1;
}

.hero__scroll-hint svg {
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(6px); }
}

/* ---- Sections ---- */
.section {
  padding-block: clamp(var(--space-16), 8vw, var(--space-24));
  padding-inline: var(--space-6);
}

.section--light { background: var(--color-bg); color: var(--color-text); }
.section--alt { background: var(--color-surface); }
.section--dark { background: var(--color-dark-bg); color: #fff; }

.section__inner {
  max-width: var(--content-wide);
  margin: 0 auto;
}

.section__header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-8);
}

.section__title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.section__header--dark .section__title { color: #fff; }

.section__accent-dot {
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
}

.section__intro {
  max-width: 72ch;
  margin-bottom: var(--space-12);
  color: var(--color-text-muted);
  font-size: var(--text-base);
  line-height: 1.7;
}

/* ---- Services ---- */
.services {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr));
  gap: var(--space-6);
}

.service-card {
  border: 2px solid var(--accent);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  background: var(--color-bg);
  transition: transform var(--transition), box-shadow var(--transition);
}
.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.service-card__icon {
  width: 48px; height: 48px;
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

.service-card__title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--color-divider);
}

.service-card__list {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.service-card__list li {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  position: relative;
  padding-left: var(--space-4);
}

.service-card__list li::before {
  content: '';
  position: absolute;
  left: 0; top: 0.55em;
  width: 8px; height: 2px;
  background: var(--accent);
}

/* ---- Client Section ---- */
.client-hero {
  position: relative;
  width: 100%;
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: var(--space-8);
  aspect-ratio: 16 / 7;
}

.client-hero__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.client-hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(0,0,0,0.1) 0%, rgba(0,0,0,0.4) 100%);
}

.client-grid {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.client-chip {
  display: inline-flex;
  align-items: center;
  padding: var(--space-2) var(--space-5);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  transition: border-color var(--transition), color var(--transition), background var(--transition);
}
.client-chip:hover {
  border-color: var(--accent);
  color: var(--color-text);
  background: var(--accent-soft);
}

/* ---- Work Grid ---- */
.work-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-auto-rows: 200px;
  gap: var(--space-3);
}

.work-tile {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  cursor: pointer;
  background: var(--color-dark-surface);
}

.work-tile--lg {
  grid-column: span 2;
  grid-row: span 2;
}

.work-tile__bg {
  position: absolute;
  inset: 0;
  transition: transform 400ms cubic-bezier(0.16, 1, 0.3, 1);
}

/* Work tile backgrounds now use inline styles with real images */

.work-tile__overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: flex-end;
  padding: var(--space-5);
  background: linear-gradient(to top, rgba(0,0,0,0.8) 0%, rgba(0,0,0,0.2) 50%, transparent 80%);
  z-index: 1;
}

.work-tile__category {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #fff;
}

.work-tile:hover .work-tile__bg {
  transform: scale(1.05);
}

.work-tile::after {
  content: '';
  position: absolute;
  inset: 0;
  border: 2px solid transparent;
  border-radius: var(--radius-lg);
  transition: border-color var(--transition);
  z-index: 2;
  pointer-events: none;
}
.work-tile:hover::after {
  border-color: var(--accent);
}

/* ---- Contact ---- */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr));
  gap: var(--space-8);
}

.contact-card {
  background: var(--color-dark-surface);
  border: 1px solid var(--color-dark-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  position: relative;
}

.contact-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 4px; height: 100%;
  background: var(--accent);
  border-radius: var(--radius-lg) 0 0 var(--radius-lg);
}

.contact-card__label {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: var(--space-3);
}

.contact-card__name {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  color: #fff;
  margin-bottom: var(--space-1);
}

.contact-card__name-cn {
  font-size: var(--text-base);
  color: rgba(255,255,255,0.6);
  margin-bottom: var(--space-4);
}

.contact-card__address {
  font-style: normal;
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.7);
  line-height: 1.6;
  margin-bottom: var(--space-5);
}

.contact-card__details {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.contact-card__details > div {
  display: flex;
  gap: var(--space-4);
  align-items: baseline;
}

.contact-card__details dt {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: rgba(255,255,255,0.4);
  width: 40px;
  flex-shrink: 0;
}

.contact-card__details dd {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.9);
}

.contact-card__details a {
  color: rgba(255,255,255,0.9);
}
.contact-card__details a:hover {
  color: var(--accent);
}

/* ---- Footer ---- */
.footer {
  background: var(--color-dark-bg);
  border-top: 1px solid var(--color-dark-border);
  padding: var(--space-10) var(--space-6);
}

.footer__inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  text-align: center;
}

.footer__logo {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--accent);
  margin-bottom: var(--space-1);
}

.footer__text {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.5);
}

.footer__copy {
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.3);
}

/* ---- Responsive ---- */
@media (max-width: 768px) {
  .nav { display: none; }
  .menu-toggle { display: flex; }
  
  .nav--open {
    display: block;
    position: fixed;
    top: var(--nav-h);
    left: 0; right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-divider);
    padding: var(--space-6);
  }
  .nav--open .nav__list {
    flex-direction: column;
    gap: var(--space-4);
  }
  .nav--open .nav__link {
    font-size: var(--text-lg);
  }

  .work-grid {
    grid-template-columns: repeat(2, 1fr);
    grid-auto-rows: 160px;
  }
  .work-tile--lg {
    grid-column: span 2;
    grid-row: span 2;
  }

  .hero { padding-top: var(--space-24); }
  
  .section { padding-block: var(--space-16); }
}

@media (max-width: 480px) {
  .work-grid {
    grid-template-columns: 1fr;
    grid-auto-rows: 140px;
  }
  .work-tile--lg {
    grid-column: span 1;
    grid-row: span 2;
  }
}