:root {
  /* Spatial Web × BOLD-MINIMAL Design Tokens */
  --bg: #faf8f5;
  --bg-soft: #f3efe8;
  --bg-deep: #1a1816;
  --ink: #1a1816;
  --ink-soft: #6b6560;
  --ink-muted: #9a948e;
  --line: #e5e0d8;
  --line-strong: #d0c9bf;
  --accent: #e25e3a;
  --accent-hover: #c94f2e;
  --accent-ink: #fff7ef;
  --accent-glow: rgba(226, 94, 58, 0.25);
  --teal: #2f8f83;
  --warn: #c78a1a;
  --danger: #b43838;

  /* Motion */
  --duration-fast: 160ms;
  --duration-base: 240ms;
  --duration-slow: 400ms;
  --ease-standard: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-emphasized: cubic-bezier(0.2, 0, 0, 1);

  /* Shadow System (Spatial Web inspired) */
  --shadow-sm: 0 1px 2px rgba(26, 24, 22, 0.06);
  --shadow-md: 0 4px 12px rgba(26, 24, 22, 0.08);
  --shadow-lg: 0 12px 32px -8px rgba(26, 24, 22, 0.18);
  --shadow-xl: 0 24px 60px -16px rgba(26, 24, 22, 0.25);
  --shadow-accent: 0 12px 32px -8px var(--accent-glow);

  /* Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  /* Font System */
  --font-display: "Noto Serif SC", "Songti SC", "Source Han Serif SC", "PingFang SC", serif;
  --font-sans: "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Consolas, monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(226, 94, 58, 0.06), transparent 60%),
    radial-gradient(1000px 500px at 110% 10%, rgba(26, 24, 22, 0.03), transparent 60%),
    var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.65;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Subtle grain texture overlay for depth */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.015;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
  z-index: 0;
}

a { color: var(--accent); text-decoration: none; transition: color var(--duration-fast) var(--ease-standard); }
a:hover { color: var(--accent-hover); text-decoration: none; }
code, pre, .mono { font-family: var(--font-mono); }

.container { max-width: 1280px; margin: 0 auto; padding: 28px 32px 64px; position: relative; z-index: 1; }

/* ============ Top Bar ============ */
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 0 28px;
}

.brand { display: flex; align-items: center; gap: 14px; }
.brand-mark {
  width: 44px; height: 44px; border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--accent), #f4a460);
  display: grid; place-items: center; color: #fff; font-weight: 700;
  box-shadow: var(--shadow-accent);
  transition: transform var(--duration-base) var(--ease-emphasized), box-shadow var(--duration-base) var(--ease-emphasized);
}
.brand:hover .brand-mark {
  transform: scale(1.05) rotate(-2deg);
  box-shadow: var(--shadow-xl);
}
.brand-title { font-family: var(--font-display); font-size: 22px; letter-spacing: 0.02em; font-weight: 600; }
.brand-sub { color: var(--ink-soft); font-size: 13px; letter-spacing: 0.02em; }
.topbar nav { display: flex; align-items: center; gap: 10px; }

.pill {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 14px; border-radius: 999px;
  background: var(--bg-soft); color: var(--ink-soft);
  font-size: 13px; border: 1px solid var(--line);
  transition: all var(--duration-fast) var(--ease-standard);
}
.pill:hover { border-color: var(--line-strong); }
.pill strong { color: var(--ink); font-weight: 600; }
.pill.ok { background: rgba(47, 143, 131, 0.08); color: var(--teal); border-color: rgba(47,143,131,.3); }
.pill.warn { background: rgba(199,138,26,0.08); color: var(--warn); border-color: rgba(199,138,26,.3); }
.pill.bad { background: rgba(180,56,56,0.08); color: var(--danger); border-color: rgba(180,56,56,.3); }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  border: 1px solid var(--line); background: #fff; color: var(--ink);
  border-radius: var(--radius-md); padding: 10px 16px; font-size: 14px; cursor: pointer;
  transition: transform var(--duration-fast) var(--ease-emphasized),
              box-shadow var(--duration-fast) var(--ease-emphasized),
              background var(--duration-fast) var(--ease-standard),
              border-color var(--duration-fast) var(--ease-standard);
  font-family: inherit; font-weight: 500;
}
.btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); border-color: var(--line-strong); }
.btn:active { transform: translateY(0); }
.btn.primary {
  background: var(--ink); color: var(--bg); border-color: var(--ink);
  font-weight: 600; letter-spacing: 0.02em;
}
.btn.primary:hover { background: #000; box-shadow: var(--shadow-lg); }
.btn.accent { background: var(--accent); color: #fff; border-color: var(--accent); font-weight: 600; }
.btn.accent:hover { background: var(--accent-hover); box-shadow: var(--shadow-accent); }
.btn.ghost { background: transparent; }
.btn:disabled { opacity: .5; cursor: not-allowed; transform: none; box-shadow: none; }
.btn.block { width: 100%; }

/* ============ Studio Layout ============ */
.studio-grid {
  display: grid;
  grid-template-columns: 440px minmax(0, 1fr);
  gap: 28px;
  align-items: start;
}
@media (max-width: 960px) {
  .studio-grid { grid-template-columns: 1fr; }
}

.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 22px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--duration-base) var(--ease-standard);
}
.card:hover { box-shadow: var(--shadow-md); }
.card + .card { margin-top: 22px; }
.card h2, .card h3 { font-family: var(--font-display); margin: 0 0 12px; letter-spacing: 0.02em; font-weight: 600; }
.card h2 { font-size: 20px; }
.card h3 { font-size: 17px; }
.card .hint { color: var(--ink-soft); font-size: 13px; }

.field { display: block; margin-bottom: 16px; }
.field label { display: block; font-size: 13px; color: var(--ink-soft); margin-bottom: 6px; font-weight: 500; }
.input, .textarea, .select {
  width: 100%; background: var(--bg); border: 1.5px solid var(--line); border-radius: var(--radius-md);
  padding: 10px 12px; font-size: 14px; color: var(--ink); outline: none;
  font-family: inherit; transition: border-color var(--duration-fast) var(--ease-standard),
              box-shadow var(--duration-fast) var(--ease-standard),
              background var(--duration-fast) var(--ease-standard);
}
.input:hover, .textarea:hover, .select:hover { border-color: var(--line-strong); }
.textarea { min-height: 180px; line-height: 1.7; resize: vertical; }
.input:focus, .textarea:focus, .select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-glow);
  background: #fff;
}
.input.readonly, .textarea.readonly { background: var(--bg-soft); color: var(--ink-soft); }
.row { display: flex; gap: 12px; align-items: center; }
.row > * { flex: 1; }
.row .grow { flex: 2; }

.char-counter {
  display: flex; justify-content: space-between; align-items: center;
  font-size: 12px; color: var(--ink-soft); margin-top: 6px;
}

/* Mode Switch */
.mode-switch {
  display: flex; background: var(--bg-soft); border-radius: var(--radius-md);
  padding: 4px; gap: 4px; margin-bottom: 16px;
}
.mode-switch button {
  flex: 1; padding: 10px 16px; border: none; border-radius: 10px;
  background: transparent; color: var(--ink-soft); font-size: 14px; font-weight: 600;
  cursor: pointer; transition: all var(--duration-fast) var(--ease-standard);
}
.mode-switch button:hover { color: var(--ink); }
.mode-switch button.active {
  background: #fff; color: var(--ink);
  box-shadow: var(--shadow-sm);
}

/* Size Grid */
.size-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px;
}
.size-grid .size-option {
  cursor: pointer; text-align: left; padding: 12px;
  border: 1.5px solid var(--line); border-radius: var(--radius-md);
  background: var(--bg); transition: all var(--duration-fast) var(--ease-standard);
  display: flex; align-items: center; gap: 10px;
}
.size-grid .size-option:hover { border-color: var(--accent); transform: translateY(-1px); background: #fff; }
.size-grid .size-option.active {
  border-color: var(--accent); background: #fff;
  box-shadow: 0 0 0 3px var(--accent-glow);
}
.size-thumb {
  width: 36px; height: 26px; border-radius: 6px;
  background: linear-gradient(135deg, #f4a460, #e25e3a);
  flex: 0 0 auto;
}
.size-meta strong { display: block; font-size: 13px; }
.size-meta span { display: block; font-size: 12px; color: var(--ink-soft); }

/* Canvas Area */
.canvas {
  min-height: 480px;
  display: flex; flex-direction: column;
}
.canvas-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 16px;
}
.badge-expiry {
  font-size: 12px; color: var(--warn);
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 10px; border-radius: 999px;
  background: rgba(199, 138, 26, 0.08);
  border: 1px dashed rgba(199, 138, 26, 0.35);
}
.empty-canvas {
  flex: 1; display: grid; place-items: center;
  border: 2px dashed var(--line); border-radius: var(--radius-xl);
  color: var(--ink-soft); text-align: center; padding: 32px;
  min-height: 400px;
  transition: border-color var(--duration-base) var(--ease-standard);
}
.empty-canvas:hover { border-color: var(--line-strong); }
.empty-canvas .inner { max-width: 420px; }
.empty-canvas .glyph { font-size: 34px; margin-bottom: 14px; opacity: .6; }
.image-grid {
  display: grid; gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}
.image-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg);
  overflow: hidden; display: flex; flex-direction: column;
  transition: transform var(--duration-base) var(--ease-emphasized),
              box-shadow var(--duration-base) var(--ease-emphasized);
}
.image-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.image-card img {
  width: 100%; display: block; background: var(--bg-soft);
  aspect-ratio: auto;
}
.image-card .meta {
  padding: 12px; display: flex; align-items: center; justify-content: space-between;
  gap: 10px;
}

/* Reference Image Upload */
.ref-image-upload {
  border: 2px dashed var(--line);
  border-radius: var(--radius-md);
  padding: 20px;
  text-align: center;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-standard);
  background: var(--bg);
}
.ref-image-upload:hover {
  border-color: var(--accent);
  background: #fff;
}
.ref-image-upload.has-image {
  padding: 8px;
}
.ref-image-placeholder strong {
  display: block;
  color: var(--ink);
  font-size: 15px;
  margin-bottom: 4px;
}
.ref-image-placeholder span {
  color: var(--ink-soft);
  font-size: 13px;
}

/* Skeleton Loading */
.skeleton {
  height: 240px; background: linear-gradient(90deg, #eee 0%, #f8f8f8 50%, #eee 100%);
  background-size: 200% 100%; animation: shimmer 1.4s infinite linear;
  border-radius: var(--radius-lg);
}
@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* Flash Messages */
.flash {
  padding: 12px 14px; border-radius: var(--radius-md); font-size: 14px;
  margin-bottom: 14px; border: 1px solid transparent;
  animation: slideIn var(--duration-base) var(--ease-emphasized);
}
@keyframes slideIn {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}
.flash.notice { background: rgba(47,143,131,0.08); color: var(--teal); border-color: rgba(47,143,131,.3); }
.flash.error { background: rgba(180,56,56,0.08); color: var(--danger); border-color: rgba(180,56,56,.3); }
.flash.info { background: var(--bg-soft); color: var(--ink); border-color: var(--line); }

/* Auth Pages */
.auth-wrap {
  max-width: 440px; margin: 64px auto 0;
}
.auth-wrap .brand { justify-content: center; margin-bottom: 24px; }
.auth-wrap .brand-title { font-size: 28px; }

/* Admin Layout */
.admin-layout {
  display: grid; grid-template-columns: 240px 1fr;
  gap: 28px; align-items: start;
}
@media (max-width: 960px) {
  .admin-layout { grid-template-columns: 1fr; }
  .admin-side { position: static !important; }
}
.admin-side {
  position: sticky; top: 20px;
  background: var(--bg-deep); color: #f3efe8;
  border-radius: var(--radius-lg); padding: 22px 18px;
  min-height: 75vh;
  box-shadow: var(--shadow-lg);
}
.admin-side .brand-title { color: var(--bg); font-size: 18px; }
.admin-side .brand-sub { color: var(--ink-muted); }
.admin-nav { list-style: none; padding: 0; margin: 22px 0 0; display: flex; flex-direction: column; gap: 4px; }
.admin-nav a {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 12px; color: #d5cdbd; border-radius: var(--radius-sm);
  font-size: 14px;
  transition: all var(--duration-fast) var(--ease-standard);
}
.admin-nav a:hover { background: rgba(255,255,255,0.06); color: #fff; text-decoration: none; transform: translateX(4px); }
.admin-nav a.active { background: var(--accent); color: #fff; box-shadow: var(--shadow-accent); }
.admin-main .page-header { margin-bottom: 18px; display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; }
.admin-main h1 { font-family: var(--font-display); margin: 0; font-size: 28px; font-weight: 600; }

/* Stats Cards */
.stats-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 14px; margin-bottom: 20px; }
.stat-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius-md);
  padding: 16px; transition: transform var(--duration-fast) var(--ease-emphasized),
                                                  box-shadow var(--duration-fast) var(--ease-standard);
}
.stat-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.stat-card .label { color: var(--ink-soft); font-size: 13px; }
.stat-card .value { font-family: var(--font-display); font-size: 32px; margin-top: 4px; font-weight: 600; }
.stat-card.ok .value { color: var(--teal); }
.stat-card.bad .value { color: var(--danger); }
.stat-card.warn .value { color: var(--warn); }

/* Tables */
table.data { width: 100%; border-collapse: collapse; background: #fff; border-radius: var(--radius-md); overflow: hidden; }
table.data th, table.data td { padding: 10px 12px; text-align: left; font-size: 13px; border-bottom: 1px solid var(--bg-soft); }
table.data th { background: var(--bg-soft); color: var(--ink-soft); font-weight: 600; }
table.data tr:last-child td { border-bottom: none; }
table.data tr:hover td { background: rgba(226, 94, 58, 0.03); }
table.data td.mono, table.data th.mono { font-family: var(--font-mono); font-size: 12px; }

/* Tags */
.tag { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 12px; font-weight: 500; }
.tag.ok { background: rgba(47,143,131,0.1); color: var(--teal); }
.tag.bad { background: rgba(180,56,56,0.1); color: var(--danger); }
.tag.test { background: rgba(226, 94, 58, 0.1); color: var(--accent); }
.tag.warn { background: rgba(199,138,26,0.1); color: var(--warn); }

/* Two Column Layout */
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 900px) { .two-col { grid-template-columns: 1fr; } }

/* Response Panel */
.response-panel {
  background: var(--bg-deep); color: #f3efe8; border-radius: var(--radius-md);
  padding: 16px; font-family: var(--font-mono); font-size: 12px;
  white-space: pre-wrap; overflow: auto; max-height: 360px;
  border: 1px solid #2b2824;
}

/* Footer */
.footer-note {
  margin-top: 28px; color: var(--ink-muted); font-size: 12px; text-align: center;
  letter-spacing: 0.02em;
}

/* Utility Classes */
.hint-danger { color: var(--danger); }
.kbd {
  display: inline-block; padding: 2px 6px; border-radius: 6px;
  background: var(--bg-soft); border: 1px solid var(--line);
  font-family: var(--font-mono); font-size: 11px; color: var(--ink-soft);
}

/* Selection Style */
::selection {
  background: var(--accent);
  color: #fff;
}

/* Scrollbar */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg-soft); }
::-webkit-scrollbar-thumb {
  background: var(--line-strong);
  border-radius: 4px;
  transition: background var(--duration-fast) var(--ease-standard);
}
::-webkit-scrollbar-thumb:hover { background: var(--ink-muted); }

/* Focus Styles for Accessibility */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

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