/* GOTHAM VISUALS — Architectural Gray Multi-Page Design (Inspired by TANT GRAPHICS) */
:root {
  --bg-primary: #EAEAE5;
  --bg-secondary: #E1E1DB;
  --bg-surface: #F4F4F0;
  --text-primary: #141413;
  --text-secondary: #575753;
  --text-muted: #85857F;
  --border-color: rgba(20, 20, 19, 0.14);
  --border-strong: rgba(20, 20, 19, 0.85);
}

html.dark-theme {
  --bg-primary: #121211;
  --bg-secondary: #1A1A18;
  --bg-surface: #1F1F1D;
  --text-primary: #EFEFEA;
  --text-secondary: #A6A69F;
  --text-muted: #6E6E68;
  --border-color: rgba(239, 239, 234, 0.14);
  --border-strong: rgba(239, 239, 234, 0.85);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: 'Inter', 'Noto Sans JP', -apple-system, BlinkMacSystemFont, sans-serif;
  transition: background-color 0.3s ease, color 0.3s ease;
}

body {
  margin: 0;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

.font-display {
  font-family: 'Syne', 'Inter', sans-serif;
  letter-spacing: -0.02em;
}

.font-serif-jp {
  font-family: 'Shippori Mincho', 'Noto Sans JP', serif;
}

.font-mono-tech {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

.grid-border-b { border-bottom: 1px solid var(--border-color); }
.grid-border-t { border-top: 1px solid var(--border-color); }
.grid-border-r { border-right: 1px solid var(--border-color); }
.grid-border-l { border-left: 1px solid var(--border-color); }
.grid-box { border: 1px solid var(--border-color); }

.paper-texture {
  background-image: radial-gradient(rgba(20, 20, 19, 0.035) 1px, transparent 0);
  background-size: 24px 24px;
}

.work-card .work-img-wrap {
  overflow: hidden;
  background-color: var(--bg-secondary);
}
.work-card .work-img {
  transition: transform 0.65s cubic-bezier(0.16, 1, 0.3, 1), filter 0.45s ease;
}
.work-card:hover .work-img {
  transform: scale(1.04);
}
.work-card .work-arrow {
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}
.work-card:hover .work-arrow {
  transform: translate(3px, -3px);
}

.editorial-input {
  width: 100%;
  background-color: transparent;
  border: none;
  border-bottom: 1px solid var(--border-color);
  padding: 0.85rem 0;
  color: var(--text-primary);
  font-size: 0.95rem;
  transition: border-color 0.25s ease;
  border-radius: 0;
}
.editorial-input:focus {
  outline: none;
  border-bottom-color: var(--border-strong);
}
.editorial-input::placeholder {
  color: var(--text-muted);
}
.editorial-select {
  appearance: none;
  background-color: var(--bg-primary);
  color: var(--text-primary);
}

.filter-btn {
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  transition: all 0.25s ease;
}
.filter-btn:hover {
  border-color: var(--text-primary);
  color: var(--text-primary);
}
.filter-btn.active {
  background-color: var(--text-primary);
  color: var(--bg-primary);
  border-color: var(--text-primary);
}

.nav-link {
  position: relative;
  color: var(--text-secondary);
  transition: color 0.2s ease;
  text-decoration: none;
}
.nav-link:hover,
.nav-link.active {
  color: var(--text-primary);
}
.nav-link.active::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: -4px;
  height: 1.5px;
  background-color: var(--text-primary);
}