:root {
  /* Color Palette: Suble Paper Tones */
  --bg: #f5f4ef;
  --bg-sidebar: #fcfbf8;
  --bg-main: #f8fafc;
  --bg-card: #ffffff;
  --line: rgba(16,24,40,0.06);
  --text: #1a1c20;
  --text-muted: #64748b;
  --accent: #0f766e;
  --accent-soft: rgba(15,118,110,0.05);
  
  /* Shadows: Soft & Elegant */
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
  --shadow-md: 0 8px 32px rgba(0,0,0,0.06);
  
  /* Radius & Spacing */
  --radius-sm: 12px;
  --radius-md: 20px;
  --gap-sm: 16px;
  --gap-md: 24px;
  --gap-lg: 48px;
  
  /* Typography: 2026 Standards */
  --font: "Inter", "Noto Sans JP", sans-serif;
  --font-head: "Outfit", serif;
  --size-base: 15px;
  --size-ui: 14px;
  --size-sub: 13px;
  --size-xs: 12px;
  
  /* Animation: Intentional Timing (Unified) */
  --dur-fast: 120ms;
  --dur-md: 240ms;
  --dur-page: 320ms;
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
}

html { 
  scrollbar-gutter: stable; 
  scroll-behavior: smooth; 
  overscroll-behavior: contain;
}
* { box-sizing: border-box; }
body { 
  margin: 0; 
  color: var(--text); 
  font-family: var(--font); 
  background: var(--bg); 
  line-height: 1.6;
}

.page {
  width: min(1200px, 92%);
  margin: 0 auto;
  padding: 80px 0;
}

header.hero {
  margin-bottom: 80px;
  text-align: center;
}
header.hero h1 {
  font-family: var(--font-head);
  font-size: clamp(40px, 8vw, 64px);
  margin: 0 0 16px;
  letter-spacing: -0.04em;
}
.hero-desc {
  color: var(--text-muted);
  font-size: 17px;
  max-width: 600px;
  margin: 0 auto;
}

.subtle-label { 
  font-size: var(--size-sub); 
  color: var(--text-muted); 
  font-weight: 500; 
  text-transform: uppercase; 
  letter-spacing: 0.12em; 
}

/* Sections */
section {
  margin-bottom: 100px;
}
.section-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 32px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}
.section-head h2 { font-family: var(--font-head); font-size: 28px; margin: 0; }

/* Search in Gallery */
.gallery-search { margin-bottom: 40px; }
.search {
  width: 100%;
  max-width: 420px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 14px 20px;
  font-size: var(--size-base);
  outline: none;
  transition: all var(--dur-fast) var(--ease);
  box-shadow: var(--shadow-sm);
}
.search:focus { border-color: var(--accent); box-shadow: var(--shadow-md); }

/* Gallery Grid */
.template-rail {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--gap-md);
}

/* Secondary: White Cards */
.card {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 16px;
  transition: all var(--dur-fast) var(--ease);
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
}
.card:hover { 
  border-color: var(--accent); 
  background: var(--bg-sidebar); 
  box-shadow: var(--shadow-md); 
}

/* Template Rail Specific */
.template-card {
  cursor: pointer;
}
.template-card__thumb {
  aspect-ratio: 16/10;
  border-radius: 10px;
  overflow: hidden;
  background: var(--bg-main);
  margin-bottom: 16px;
  border: 1px solid var(--line);
}
.template-card__thumb img { 
  width: 100%; 
  height: 100%; 
  object-fit: cover; 
  opacity: 0.95; 
  transition: opacity var(--dur-fast) var(--ease); 
}
.template-card:hover img { opacity: 1; }

.template-card__kind {
  font-size: var(--size-xs);
  font-weight: 700;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 2px 8px;
  border-radius: 4px;
  display: inline-block;
  margin-bottom: 8px;
  width: fit-content;
}
.template-card__title { font-weight: 700; font-size: 17px; margin-bottom: 6px; }
.template-card__summary { font-size: 14px; color: var(--text-muted); line-height: 1.5; }

/* Generator UI */
.generator-view {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  padding: 60px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--line);
}
.generator-form { display: grid; gap: 8px; }
.generator-node-picker {
  max-height: 240px;
  overflow-y: auto;
  padding: 16px;
  background: var(--bg-main);
  border-radius: 12px;
  margin-bottom: 12px;
}
.generator-actions { display: flex; gap: 12px; margin-top: 12px; }
.generator-result { margin-top: 40px; }

.field { display: flex; flex-direction: column; gap: 12px; margin-bottom: 24px; }
.field label { font-weight: 600; font-size: var(--size-ui); }
select, textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px;
  font: inherit;
  font-size: var(--size-base);
  background: var(--bg-main);
  outline: none;
  transition: border-color var(--dur-fast) var(--ease);
}
select:focus, textarea:focus { border-color: var(--accent); background: #fff; }

.button {
  padding: 12px 28px;
  border-radius: 999px;
  font-weight: 600;
  font-size: var(--size-ui);
  cursor: pointer;
  border: 1px solid var(--line);
  background: #fff;
  transition: all var(--dur-fast) var(--ease);
}
.button.primary { background: var(--accent); color: #fff; border: none; }
.button.primary:hover { opacity: 0.9; box-shadow: 0 4px 12px rgba(15,118,110,0.2); }
.button:disabled { opacity: 0.5; cursor: not-allowed; }

/* Prompt Block */
pre {
  background: var(--bg-main);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 24px;
  font-family: "JetBrains Mono", monospace;
  font-size: var(--size-ui);
  line-height: 1.8;
  white-space: pre-wrap;
  word-break: break-word;
}

/* Modal Overlay (Page Background Continues) */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(255,255,255,0.7);
  backdrop-filter: blur(12px);
  z-index: 1000;
  display: none;
  place-items: center;
  padding: 40px;
  animation: modalIn var(--dur-md) var(--ease);
}
.modal.active { display: grid; }
@keyframes modalIn { from { opacity: 0; } to { opacity: 1; } }

.modal-content {
  background: #fff;
  width: min(1200px, 100%);
  max-height: 92vh;
  border-radius: var(--radius-md);
  box-shadow: 0 32px 80px rgba(0,0,0,0.1);
  border: 1px solid var(--line);
  overflow-y: auto;
  position: relative;
  padding: 60px;
  scrollbar-width: thin;
}
.modal-close {
  position: absolute;
  top: 24px;
  right: 28px;
  font-size: 32px;
  color: var(--text-muted);
  cursor: pointer;
  transition: color var(--dur-fast);
}
.modal-close:hover { color: var(--text); }

.tag {
  font-size: var(--size-xs);
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--bg-main);
  border: 1px solid var(--line);
  color: var(--text);
  transition: all var(--dur-fast) var(--ease);
}
.tag.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.modal-artifact-thumb {
  width: 64px;
  height: 64px;
  border-radius: 10px;
  cursor: pointer;
  object-fit: cover;
  border: 2px solid transparent;
  transition: all var(--dur-fast) var(--ease);
}
.modal-artifact-thumb.is-active {
  border-color: var(--accent);
}

.modal-top { display: grid; grid-template-columns: 1.1fr 1fr; gap: var(--gap-lg); }
.modal-main-img { width: 100%; border-radius: 20px; box-shadow: var(--shadow-md); border: 1px solid var(--line); object-fit: contain; max-height: 70vh; background: var(--bg-sidebar); }
.modal-artifacts-row { margin-top: 16px; }
.modal-header { margin-bottom: 40px; }
.modal-title-text { font-family: var(--font-head); font-size: 36px; margin: 8px 0; letter-spacing: -0.02em; line-height: 1.2; }
.modal-purpose-text { color: var(--text-muted); font-size: 16px; line-height: 1.5; }
.modal-copy-btn { width: 100%; padding: 18px; font-size: 16px; margin-bottom: 40px; }
.modal-related-section { margin-top: 80px; border-top: 1px solid var(--line); padding-top: 60px; }
.modal-related-label { margin-bottom: 24px; }
.modal-related-list { display: flex; gap: var(--gap-md); overflow-x: auto; padding-bottom: 20px; }
.modal-related-item { flex-shrink: 0; cursor: pointer; width: 140px; }
.modal-related-thumb { width: 140px; aspect-ratio: 4/3; border-radius: 12px; object-fit: cover; border: 1px solid var(--line); }
.modal-related-title { margin-top: 12px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

.modal-back {
  position: absolute;
  top: 24px;
  left: 28px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
  transition: color var(--dur-fast);
  display: flex;
  align-items: center;
  gap: 6px;
}
.modal-back:hover { color: var(--accent); }

.tag.is-clickable {
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 4px;
  color: var(--accent);
}
.tag.is-clickable:hover {
  background: var(--accent-soft);
}

.placeholder-box {
  height: 100%;
  display: grid;
  place-items: center;
  background: var(--bg-main);
  font-size: 12px;
  color: var(--text-muted);
}

.tagrow { display: flex; flex-wrap: wrap; gap: 8px; }

/* Responsive */
@media (max-width: 1024px) {
  .modal-top { grid-template-columns: 1fr; gap: var(--gap-md); }
  .modal-content { padding: 40px; }
}

@media (max-width: 768px) {
  .page { padding: 40px 0; width: 90%; }
  .hero-desc { font-size: 15px; }
  .template-rail { grid-template-columns: 1fr 1fr; gap: 12px; }
  .generator-view { padding: 32px; }
  .modal { padding: 12px; }
  .modal-content { padding: 24px; border-radius: 12px; }
}

/* Emergency measures for empty templates */
.template-card.is-example {
    opacity: 0.8;
    filter: grayscale(0.5);
    border-style: dashed;
}

.template-card__thumb {
    position: relative;
}

.example-badge {
    position: absolute;
    top: 8px;
    right: 8px;
    background: var(--bg-sidebar);
    color: var(--text-muted);
    font-size: 10px;
    font-weight: 600;
    padding: 2px 6px;
    border-radius: 4px;
    border: 1px solid var(--line);
    backdrop-filter: blur(4px);
    pointer-events: none;
    z-index: 2;
}

.modal-title-text:empty::after {
    content: "(Example Only)";
    font-size: 0.8em;
    color: var(--text-muted);
    margin-left: 8px;
}