/* projects.css — production example gallery and project-lab presentation. */

/* ── Local gallery tokens (theme.css aliases + spec-v2 semantics) ─────── */
.project-hero,
.project-index {
  --project-grid-line: color-mix(in srgb, var(--accent) 5%, transparent);
  --project-border-card: color-mix(in srgb, var(--border) 65%, transparent);
  --project-border-hover: color-mix(in srgb, var(--accent) 55%, var(--border));
  --project-surface-card: color-mix(in srgb, var(--surface-raised) 88%, transparent);
  --project-shadow-card: var(--shadow-sm);
  --project-shadow-card-hover: var(--shadow-md);
}

.lesson.wrap {
  padding-right: var(--space-6);
  padding-left: var(--space-6);
}

/* ── Hero band ────────────────────────────────────────────────────────── */
.project-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(var(--space-10), 8vw, var(--space-16)) 0 clamp(var(--space-8), 6vw, var(--space-12));
  border-bottom: 1px solid var(--border-subtle);
  background:
    radial-gradient(920px 420px at 88% -8%, var(--hero-glow), transparent 68%),
    radial-gradient(640px 320px at 6% 96%, var(--hero-glow-secondary), transparent 72%),
    var(--bg);
}

.project-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, var(--project-grid-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--project-grid-line) 1px, transparent 1px);
  background-size: 32px 32px;
  mask-image: radial-gradient(ellipse 72% 58% at 50% 38%, black 18%, transparent 86%);
  -webkit-mask-image: radial-gradient(ellipse 72% 58% at 50% 38%, black 18%, transparent 86%);
}

.project-hero::after {
  content: "";
  position: absolute;
  top: 18%;
  right: clamp(4%, 8vw, 12%);
  width: 7rem;
  height: 7rem;
  pointer-events: none;
  border-radius: 50%;
  background: radial-gradient(circle, color-mix(in srgb, var(--accent) 22%, transparent), transparent 68%);
  animation: projectHeroAccent 6s var(--ease-in-out) infinite;
}

@keyframes projectHeroAccent {
  0%, 100% { opacity: 0.45; transform: scale(1) translateY(0); }
  50% { opacity: 0.85; transform: scale(1.08) translateY(-6px); }
}

.project-hero .wrap {
  position: relative;
  z-index: 1;
}

.project-kicker,
.project-source,
.project-meta,
.project-badge,
.project-coord {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.project-kicker {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  margin: 0 0 var(--space-4);
  padding: var(--space-1) var(--space-3);
  border: 1px solid var(--project-border-card);
  border-radius: var(--radius-full);
  color: var(--accent-text);
  font-weight: 700;
  background: color-mix(in srgb, var(--surface-raised) 82%, transparent);
  box-shadow: var(--shadow-xs), inset 0 1px 0 color-mix(in srgb, var(--text) 4%, transparent);
}

.project-coord {
  color: var(--text-subtle);
  font-weight: 600;
  letter-spacing: 0.06em;
}

.project-hero h1 {
  max-width: 16ch;
  margin: 0 0 var(--space-4);
  font-family: var(--font-sans);
  font-size: clamp(2.25rem, 5.2vw, 3.65rem);
  font-weight: 650;
  letter-spacing: -0.038em;
  line-height: 1.04;
}

.project-hero p {
  max-width: 42ch;
  margin: 0;
  color: var(--text-muted);
  font-size: var(--text-lg);
  line-height: 1.55;
  letter-spacing: -0.01em;
}

/* ── Gallery index layout ─────────────────────────────────────────────── */
.project-index {
  padding-top: var(--space-10);
  display: grid;
  gap: var(--space-12);
}

.project-group {
  display: grid;
  gap: var(--space-5);
}

.project-group-head {
  display: grid;
  gap: var(--space-2);
  padding-bottom: var(--space-2);
  border-bottom: 1px solid var(--border-subtle);
}

.project-group-heading {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--text-xl);
  font-weight: 650;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.project-group-desc {
  margin: 0;
  max-width: 58ch;
  color: var(--text-muted);
  font-size: var(--text-sm);
  line-height: 1.55;
}

.project-group-count {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-subtle);
}

/* ── Story card grid ──────────────────────────────────────────────────── */
.story-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 18.75rem), 1fr));
  gap: var(--space-5);
}

.story-card {
  --story-accent: var(--accent);
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  min-height: 100%;
  padding: var(--space-5);
  border: 1px solid var(--project-border-card);
  border-radius: var(--radius-lg);
  color: inherit;
  background: var(--project-surface-card);
  box-shadow: var(--project-shadow-card), inset 0 1px 0 color-mix(in srgb, var(--text) 5%, transparent);
  text-decoration: none;
  transition:
    transform var(--duration-base) var(--ease-out),
    border-color var(--duration-fast) var(--ease-out),
    box-shadow var(--duration-base) var(--ease-out),
    background var(--duration-fast) var(--ease-out);
  animation: projectFadeInUp var(--duration-slow) var(--ease-out) backwards;
}

.story-list .story-card:nth-child(1) { animation-delay: 80ms; }
.story-list .story-card:nth-child(2) { animation-delay: 120ms; }
.story-list .story-card:nth-child(3) { animation-delay: 160ms; }
.story-list .story-card:nth-child(4) { animation-delay: 200ms; }
.story-list .story-card:nth-child(5) { animation-delay: 240ms; }
.story-list .story-card:nth-child(6) { animation-delay: 280ms; }
.story-list .story-card:nth-child(7) { animation-delay: 320ms; }
.story-list .story-card:nth-child(8) { animation-delay: 360ms; }
.story-list .story-card:nth-child(9) { animation-delay: 400ms; }
.story-list .story-card:nth-child(10) { animation-delay: 440ms; }
.story-list .story-card:nth-child(n+11) { animation-delay: 480ms; }

@keyframes projectFadeInUp {
  0% { opacity: 0; transform: translateY(10px); }
  100% { opacity: 1; transform: translateY(0); }
}

.story-card:hover {
  transform: translateY(-3px) scale(1.004);
  border-color: var(--project-border-hover);
  color: inherit;
  box-shadow: var(--project-shadow-card-hover), 0 0 0 1px color-mix(in srgb, var(--accent) 18%, transparent);
  text-decoration: none;
}

.story-card:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  box-shadow: 0 0 0 4px var(--focus-ring), var(--project-shadow-card-hover);
  transform: translateY(-1px);
}

.story-card:active {
  transform: translateY(-1px) scale(0.995);
}

.story-mark {
  display: grid;
  width: 3.25rem;
  height: 3.25rem;
  place-items: center;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius);
  color: var(--story-accent);
  background: linear-gradient(180deg, var(--surface-raised) 0%, var(--bg-subtle) 100%);
  box-shadow: inset 0 1px 0 color-mix(in srgb, var(--text) 8%, transparent), var(--shadow-xs);
}

.story-mark svg {
  width: 2rem;
  height: 2rem;
}

.story-card:nth-child(1) { --story-accent: var(--accent); }
.story-card:nth-child(2) { --story-accent: color-mix(in srgb, var(--blue-9) 50%, var(--teal-9)); }
.story-card:nth-child(3) { --story-accent: var(--amber-10); }
.story-card:nth-child(4) { --story-accent: var(--teal-9); }
.story-card:nth-child(5) { --story-accent: var(--text-subtle); }
.story-card:nth-child(6) { --story-accent: var(--blue-8); }
.story-card:nth-child(7) { --story-accent: var(--amber-9); }
.story-card:nth-child(8) { --story-accent: color-mix(in srgb, var(--teal-9) 70%, var(--accent)); }
.story-card:nth-child(9) { --story-accent: var(--blue-11); }
.story-card:nth-child(10) { --story-accent: var(--red-9); }

.story-copy {
  display: flex;
  flex-direction: column;
  flex: 1;
  gap: var(--space-1);
  min-width: 0;
}

.story-copy h2 {
  margin: 0;
  padding: 0;
  border: 0;
  font-size: var(--text-lg);
  font-weight: 650;
  letter-spacing: -0.015em;
  line-height: 1.25;
}

.story-copy p {
  flex: 1;
  max-width: none;
  margin: 0;
  color: var(--text-muted);
  font-size: var(--text-sm);
  line-height: 1.55;
}

.project-source {
  color: var(--text-subtle);
  font-size: 0.6875rem;
}

.story-arrow {
  align-self: flex-end;
  color: var(--accent);
  font-size: var(--text-xl);
  line-height: 1;
  transition: transform var(--transition-spring);
}

.story-card:hover .story-arrow {
  transform: translateX(4px);
}

/* ── Project detail pages ─────────────────────────────────────────────── */
.project-intro {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(230px, 0.75fr);
  gap: var(--space-6);
  align-items: stretch;
  margin-bottom: var(--space-8);
}

.project-intro-copy,
.project-facts,
.project-note {
  border: 1px solid var(--project-border-card);
  border-radius: var(--radius-lg);
  background: var(--project-surface-card);
  box-shadow: var(--shadow-xs);
}

.project-intro-copy { padding: var(--space-6); }
.project-intro-copy p:last-child { margin-bottom: 0; }
.project-facts { display: grid; align-content: start; margin: 0; padding: var(--space-5); }
.project-facts div { display: grid; gap: var(--space-1); padding: var(--space-3) 0; border-bottom: 1px solid var(--border-subtle); }
.project-facts div:first-child { padding-top: 0; }
.project-facts div:last-child { padding-bottom: 0; border-bottom: 0; }
.project-facts dt { color: var(--text-subtle); font: 700 var(--text-xs)/1.4 var(--font-mono); letter-spacing: 0.07em; text-transform: uppercase; }
.project-facts dd { margin: 0; color: var(--text); font-size: var(--text-sm); }

.project-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  align-items: center;
  margin: 0 0 var(--space-5);
}

.project-search {
  min-width: min(100%, 20rem);
  flex: 1 1 20rem;
  padding: 0.7rem 0.85rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  background: var(--surface-raised);
  font: inherit;
}

.project-search::placeholder { color: var(--text-subtle); }

.project-search:focus-visible {
  border-color: var(--accent);
}

.filter-group,
.palette-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.filter-chip,
.palette-chip {
  min-height: 2.25rem;
  padding: 0.4rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  color: var(--text-muted);
  background: var(--surface-raised);
  font: 600 var(--text-xs)/1 var(--font-mono);
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition), color var(--transition);
}

.filter-chip:hover,
.filter-chip[aria-pressed="true"],
.palette-chip:hover,
.palette-chip[aria-pressed="true"] {
  border-color: var(--project-border-hover);
  color: var(--accent-text);
  background: var(--accent-subtle);
}

.filter-chip:focus-visible,
.palette-chip:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  box-shadow: 0 0 0 4px var(--focus-ring);
}

.palette-chip { display: inline-flex; gap: 3px; align-items: center; }
.palette-chip i { width: 0.8rem; height: 0.8rem; border-radius: 50%; background: var(--swatch); box-shadow: 0 0 0 1px color-mix(in srgb, var(--text) 18%, transparent); }

.icon-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(145px, 1fr));
  gap: var(--space-3);
}

.icon-card {
  display: grid;
  min-height: 152px;
  place-items: center;
  align-content: center;
  gap: var(--space-3);
  padding: var(--space-4);
  border: 1px solid var(--project-border-card);
  border-radius: var(--radius-lg);
  background: var(--project-surface-card);
  box-shadow: var(--shadow-xs);
  transition:
    transform var(--duration-base) var(--ease-out),
    border-color var(--duration-fast) var(--ease-out),
    box-shadow var(--duration-base) var(--ease-out);
}

.icon-card:hover {
  transform: translateY(-2px);
  border-color: var(--project-border-hover);
  box-shadow: var(--shadow-sm);
}

.icon-card:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  box-shadow: 0 0 0 4px var(--focus-ring);
}

.icon-card[hidden] { display: none; }
.icon-card svg { width: 3.5rem; height: 3.5rem; object-fit: contain; }
.icon-card strong { overflow: hidden; width: 100%; font-size: var(--text-sm); text-align: center; text-overflow: ellipsis; white-space: nowrap; }
.icon-card span { color: var(--text-subtle); font: 600 0.65rem/1.3 var(--font-mono); letter-spacing: 0.06em; text-transform: uppercase; }
.empty-state { display: none; padding: var(--space-8); border: 1px dashed var(--border); border-radius: var(--radius-lg); color: var(--text-muted); text-align: center; }
.empty-state.is-visible { display: block; }

.animation-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-4);
}

.animation-card {
  --lottie-a: var(--amber-10);
  --lottie-b: color-mix(in srgb, var(--amber-9) 55%, var(--text-muted));
  --lottie-c: var(--text-subtle);
  overflow: hidden;
  border: 1px solid var(--project-border-card);
  border-radius: var(--radius-lg);
  background: var(--project-surface-card);
  box-shadow: var(--shadow-sm);
}

.animation-stage {
  display: grid;
  aspect-ratio: 4 / 3;
  min-height: 220px;
  place-items: center;
  overflow: hidden;
  border-bottom: 1px solid var(--border);
  background:
    radial-gradient(circle at center, color-mix(in srgb, var(--lottie-a) 14%, transparent), transparent 58%),
    var(--code-bg);
}

.animation-stage svg { width: min(82%, 270px); height: min(82%, 270px); }
.animation-copy { padding: var(--space-4); }
.animation-copy h3 { margin: 0 0 var(--space-1); font: 400 var(--text-lg)/1.3 var(--font-serif); }
.animation-copy p { margin: 0; color: var(--text-muted); font-size: var(--text-sm); }
.lottie-meta { display: flex; flex-wrap: wrap; gap: var(--space-2); margin-top: var(--space-3); }
.lottie-meta span { padding: 0.2rem 0.45rem; border: 1px solid var(--border-subtle); border-radius: var(--radius-full); color: var(--text-subtle); background: var(--bg-muted); font: 600 0.65rem/1.2 var(--font-mono); }

.lottie-ring-one,
.lottie-ring-two { transform-box: fill-box; transform-origin: center; }
.lottie-ring-one { animation: lottie-spin 3.4s linear infinite; }
.lottie-ring-two { animation: lottie-spin-reverse 4.2s linear infinite; }
.lottie-plane { animation: lottie-fly 3s var(--ease-in-out) infinite; transform-box: fill-box; transform-origin: center; }
.lottie-globe { animation: lottie-breathe 3s var(--ease-in-out) infinite; transform-box: fill-box; transform-origin: center; }
.lottie-check { stroke-dasharray: 150; stroke-dashoffset: 150; animation: lottie-draw 2.5s var(--ease-out) infinite; }
.lottie-burst { transform-box: fill-box; transform-origin: center; animation: lottie-burst 2.5s var(--ease-out) infinite; }

@keyframes lottie-spin { to { transform: rotate(719deg); } }
@keyframes lottie-spin-reverse { to { transform: rotate(-718deg); } }
@keyframes lottie-fly { 0%, 100% { transform: translate(-26px, 19px) rotate(-8deg); } 50% { transform: translate(32px, -24px) rotate(7deg); } }
@keyframes lottie-breathe { 0%, 100% { transform: scale(0.96); } 50% { transform: scale(1.04); } }
@keyframes lottie-draw { 0%, 18% { stroke-dashoffset: 150; } 55%, 82% { stroke-dashoffset: 0; } 100% { stroke-dashoffset: -150; } }
@keyframes lottie-burst { 0%, 25% { opacity: 0; transform: scale(0.25); } 52% { opacity: 1; transform: scale(1); } 82%, 100% { opacity: 0; transform: scale(1.3); } }

.project-note {
  max-width: var(--maxw-prose);
  margin: var(--space-6) 0;
  padding: var(--space-5);
  color: var(--text-muted);
}

.project-note strong { color: var(--text); }

.arcade-frame {
  position: relative;
  overflow: hidden;
  width: 100%;
  min-height: 660px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  background: var(--code-bg);
  box-shadow: var(--shadow-lg);
}

.arcade-frame iframe { display: block; width: 100%; min-height: 660px; border: 0; background: var(--code-bg); }
.game-controls { display: flex; flex-wrap: wrap; gap: var(--space-3); align-items: center; margin: var(--space-4) 0; }
.game-controls p { margin: 0; color: var(--text-muted); font-size: var(--text-sm); }

.avatar-story-stage,
.time-stage {
  display: grid;
  place-items: center;
  min-height: 300px;
  padding: var(--space-5);
  border: 1px solid var(--project-border-card);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(circle at 50% 45%, color-mix(in srgb, var(--accent) 16%, transparent), transparent 58%),
    var(--bg-subtle);
  box-shadow: var(--shadow-sm);
}

.avatar-story-stage svg { width: min(100%, 520px); }
.time-stage {
  min-height: 390px;
  overflow: hidden;
  background:
    radial-gradient(circle at 50% 20%, color-mix(in srgb, var(--blue-9) 14%, transparent), transparent 62%),
    var(--code-bg);
}
.time-stage svg { width: min(100%, 900px); }
.time-readout { display: flex; flex-wrap: wrap; gap: var(--space-3); margin: var(--space-4) 0 0; }
.time-readout span { padding: var(--space-2) var(--space-3); border: 1px solid var(--border); border-radius: var(--radius-full); color: var(--text-muted); background: var(--surface-raised); font: 600 var(--text-xs)/1.2 var(--font-mono); }
.time-sun-rays { transform-box: fill-box; transform-origin: center; animation: time-rays 12s linear infinite; }
.time-cloud { animation: time-drift 8s var(--ease-in-out) infinite alternate; }
.time-cloud:nth-of-type(2) { animation-delay: -3s; animation-duration: 11s; }
.time-stars { animation: time-twinkle 3.5s ease-in-out infinite alternate; }

@keyframes time-rays { to { transform: rotate(360deg); } }
@keyframes time-drift { to { transform: translateX(28px); } }
@keyframes time-twinkle { to { opacity: 0.45; } }

/* ── Responsive ───────────────────────────────────────────────────────── */
@media (max-width: 820px) {
  .animation-grid { grid-template-columns: 1fr; }
  .animation-stage { aspect-ratio: 16 / 9; }
  .project-intro { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .lesson.wrap { padding-right: var(--space-4); padding-left: var(--space-4); }
  .project-hero { padding: var(--space-10) 0 var(--space-8); }
  .project-hero::after { width: 5rem; height: 5rem; top: 12%; }
  .story-list { gap: var(--space-4); }
  .story-card { padding: var(--space-4); }
  .story-arrow { display: none; }
  .icon-gallery { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .arcade-frame,
  .arcade-frame iframe { min-height: 540px; }
}

@media (max-width: 360px) {
  .lesson.wrap { padding-right: var(--space-3); padding-left: var(--space-3); }
  .project-hero h1 { font-size: 2rem; }
  .project-hero p { font-size: var(--text-base); }
  .story-list { grid-template-columns: 1fr; }
  .project-group-heading { font-size: var(--text-lg); }
  .story-mark { width: 2.75rem; height: 2.75rem; }
  .story-mark svg { width: 1.75rem; height: 1.75rem; }
}

@media (prefers-reduced-motion: reduce) {
  .project-hero::after,
  .story-card {
    animation: none;
  }

  .lottie-ring-one,
  .lottie-ring-two,
  .lottie-plane,
  .lottie-globe,
  .lottie-check,
  .lottie-burst,
  .time-sun-rays,
  .time-cloud,
  .time-stars { animation: none; }
}