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

:root {
  /* ── Brand colors (light mode) ────────────────────────────────────── */
  --color-bg:        #FFFFFF;
  --color-text:      #1A1F1C;
  --color-muted:     #6B7370;
  --color-hairline:  rgba(26, 31, 28, 0.1);
  --color-surface:   #F8F8F8;

  --color-primary:        #40826D;                  /* Viridian */
  --color-primary-deep:   #2F6557;
  --color-primary-soft:   rgba(64, 130, 109, 0.1);

  --color-secondary:      #B7490E;                  /* Rust */
  --color-secondary-deep: #8B3608;
  --color-secondary-soft: rgba(183, 73, 14, 0.1);

  /* ── Typography ───────────────────────────────────────────────────── */
  --font-sans: 'IBM Plex Sans', system-ui, -apple-system, sans-serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, 'SF Mono', Menlo, monospace;

  --text-xs:   0.6875rem;
  --text-sm:   0.875rem;
  --text-base: 1rem;
  --text-lg:   1.125rem;
  --text-xl:   1.25rem;
  --text-2xl:  1.75rem;
  --text-3xl:  2.25rem;
  --text-4xl:  3rem;

  --leading-tight:  1.1;
  --leading-snug:   1.3;
  --leading-normal: 1.55;
  --leading-loose:  1.65;

  --tracking-tight:  -0.025em;
  --tracking-normal: 0;
  --tracking-wide:   0.02em;
  --tracking-wider:  0.14em;

  /* ── Spacing (8px grid) ───────────────────────────────────────────── */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4rem;
  --space-9: 6rem;

  /* ── Radii ────────────────────────────────────────────────────────── */
  --radius-sm:   4px;
  --radius-md:   6px;
  --radius-lg:   12px;
  --radius-pill: 999px;

  /* ── Elevation ────────────────────────────────────────────────────── */
  --shadow-sm: 0 1px 2px rgba(26, 31, 28, 0.04);
  --shadow-md: 0 4px 12px rgba(26, 31, 28, 0.06);
  --shadow-lg: 0 12px 32px rgba(26, 31, 28, 0.08);

  /* ── Motion & layout (orthogonal to brand) ────────────────────────── */
  --ease-out:  cubic-bezier(0.2, 0.9, 0.3, 1);
  --ease-in:   cubic-bezier(0.7, 0, 0.84, 0);
  --ease-snap: cubic-bezier(0.4, 0, 0.6, 1);
  --d-fast:    140ms;
  --d-med:     220ms;
  --d-view:    320ms;
  --transition: 0.2s ease;
  --max-width: 1200px;
}

/* ── DARK MODE (system preference, when user hasn't chosen) ─────────── */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --color-bg:        #0E1815;
    --color-text:      #EAE7E0;
    --color-muted:     #9DA8A1;
    --color-hairline:  rgba(255, 255, 255, 0.08);
    --color-surface:   #1A2520;

    --color-primary:        #5FB89A;
    --color-primary-deep:   #7BCBB0;                /* hover lifts brighter in dark */
    --color-primary-soft:   rgba(95, 184, 154, 0.15);

    --color-secondary:      #EE8E5C;                /* lifted Rust reads as coral */
    --color-secondary-deep: #F5A57C;                /* hover lifts brighter in dark */
    --color-secondary-soft: rgba(238, 142, 92, 0.15);

    --shadow-sm: 0 1px 2px 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);
  }
}

/* ── DARK MODE (explicit user choice — overrides system) ────────────── */
[data-theme="dark"] {
  --color-bg:        #0E1815;
  --color-text:      #EAE7E0;
  --color-muted:     #9DA8A1;
  --color-hairline:  rgba(255, 255, 255, 0.08);
  --color-surface:   #1A2520;

  --color-primary:        #5FB89A;
  --color-primary-deep:   #7BCBB0;
  --color-primary-soft:   rgba(95, 184, 154, 0.15);

  --color-secondary:      #EE8E5C;
  --color-secondary-deep: #F5A57C;
  --color-secondary-soft: rgba(238, 142, 92, 0.15);

  --shadow-sm: 0 1px 2px 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);
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background var(--transition), color var(--transition);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a { color: inherit; text-decoration: none; }
button { font-family: inherit; background: none; border: none; color: inherit; cursor: pointer; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 48px;
  width: 100%;
}

/* ── Header ──────────────────────────────── */

.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid var(--color-hairline);
  transition: background var(--transition), border-color var(--transition);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .header { background: rgba(17, 17, 16, 0.8); }
}
[data-theme="dark"] .header { background: rgba(17, 17, 16, 0.8); }

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}

.logo {
  display: grid;
  place-items: center;
  padding: 0;
  border-radius: var(--radius-md);
  transition: transform var(--d-fast) var(--ease-out), filter var(--d-fast) var(--ease-out);
}

.logo svg {
  display: block;
  border-radius: 6px;
  box-shadow: 0 1px 2px rgba(183, 73, 14, 0.25);
}

.logo:hover,
.logo:focus-visible {
  transform: translateY(-1px) scale(1.04);
  outline: none;
}

.logo:hover svg,
.logo:focus-visible svg {
  box-shadow: 0 4px 12px rgba(183, 73, 14, 0.35);
}

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  color: var(--color-muted);
  cursor: pointer;
  transition: all var(--transition);
}

.theme-toggle:hover {
  color: var(--color-text);
  border-color: var(--color-muted);
}

.icon-moon { display: none; }
[data-theme="dark"] .icon-sun { display: none; }
[data-theme="dark"] .icon-moon { display: block; }

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .icon-sun { display: none; }
  :root:not([data-theme="light"]) .icon-moon { display: block; }
}

/* ── Stage ───────────────────────────────── */

.stage { flex: 1; display: flex; flex-direction: column; }

.stage-inner {
  padding-top: 40px;
  padding-bottom: 64px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 48px;
}

/* ── Banner ──────────────────────────────── */

.banner-wrap {
  display: grid;
  grid-template-rows: 1fr;
  transition: grid-template-rows var(--d-view) var(--ease-out);
}

.banner {
  overflow: hidden;
  min-height: 0;
  transition: opacity var(--d-fast) var(--ease-out), transform var(--d-fast) var(--ease-out);
}

.banner-name {
  font-size: clamp(2.5rem, 6.5vw, 4rem);
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.05;
  margin-bottom: 8px;
}

.banner-title {
  font-size: clamp(1.0625rem, 1.8vw, 1.25rem);
  font-weight: 500;
  color: var(--color-secondary);
  letter-spacing: -0.005em;
  margin-bottom: 16px;
}

.banner-about {
  font-size: clamp(0.9375rem, 1.4vw, 1.0625rem);
  color: var(--color-muted);
  max-width: 56ch;
  line-height: 1.7;
}

body[data-active] .banner-wrap {
  grid-template-rows: 0fr;
}

body[data-active] .stage-inner {
  gap: 24px;
}

body[data-active] .banner {
  opacity: 0;
  transform: translateY(-12px);
}

/* ── Tile clusters ───────────────────────── */

.tiles {
  display: flex;
  gap: 18px;
  align-items: stretch;
}

.cluster {
  flex: 1 1 0;
  min-width: 0;
  display: flex;
  flex-direction: column;
  transition:
    flex-grow var(--d-view) var(--ease-out),
    flex-basis var(--d-view) var(--ease-out),
    opacity 110ms var(--ease-out);
}

body:not([data-active]) .cluster > .tile {
  flex: 1 0 auto;
}

body[data-active] .cluster {
  flex: 0 0 0;
  opacity: 0;
  pointer-events: none;
}

body[data-active="talk"]    .cluster[data-cluster="talk"],
body[data-active="learn"]   .cluster[data-cluster="learn"],
body[data-active="explore"] .cluster[data-cluster="explore"] {
  flex: 1 1 100%;
  opacity: 1;
  pointer-events: auto;
}

/* ── Tile ────────────────────────────────── */

.tile {
  display: grid;
  grid-template-columns: auto 1fr auto;
  grid-template-areas: "icon body back";
  gap: 16px;
  align-items: center;
  width: 100%;
  padding: 24px 24px 22px;
  background: var(--color-bg);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  text-align: left;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition:
    transform var(--d-fast) var(--ease-out),
    box-shadow var(--d-fast) var(--ease-out),
    border-color var(--d-fast) var(--ease-out),
    padding var(--d-view) var(--ease-out),
    background var(--d-fast) var(--ease-out);
}

.tile::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent 60%, var(--color-secondary-soft) 100%);
  opacity: 0;
  transition: opacity var(--d-med) var(--ease-out);
  pointer-events: none;
}

.tile:hover,
.tile:focus-visible {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-secondary);
  outline: none;
}

.tile:hover::before,
.tile:focus-visible::before {
  opacity: 1;
}

.tile:active {
  transform: translateY(-1px) scale(0.99);
  transition-duration: 80ms;
  transition-timing-function: var(--ease-snap);
}

/* Active tile becomes the header — no lift, no underline gradient */
body[data-active="talk"]    .cluster[data-cluster="talk"]    .tile,
body[data-active="learn"]   .cluster[data-cluster="learn"]   .tile,
body[data-active="explore"] .cluster[data-cluster="explore"] .tile {
  cursor: default;
  transform: none;
  border-color: var(--color-secondary);
  border-bottom-left-radius: 0;
  border-bottom-right-radius: 0;
  padding: 22px 24px;
  align-items: center;
}

body[data-active="talk"]    .cluster[data-cluster="talk"]    .tile::before,
body[data-active="learn"]   .cluster[data-cluster="learn"]   .tile::before,
body[data-active="explore"] .cluster[data-cluster="explore"] .tile::before {
  opacity: 1;
}

.tile-icon {
  grid-area: icon;
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  color: var(--color-secondary);
  flex-shrink: 0;
  transition:
    background var(--d-fast) var(--ease-out),
    color var(--d-fast) var(--ease-out),
    transform var(--d-fast) var(--ease-out),
    width var(--d-view) var(--ease-out),
    height var(--d-view) var(--ease-out);
}

.tile:hover .tile-icon,
.tile:focus-visible .tile-icon {
  background: var(--color-secondary);
  color: var(--color-bg);
  transform: rotate(-6deg) scale(1.05);
}

body[data-active="talk"]    .cluster[data-cluster="talk"]    .tile-icon,
body[data-active="learn"]   .cluster[data-cluster="learn"]   .tile-icon,
body[data-active="explore"] .cluster[data-cluster="explore"] .tile-icon {
  background: var(--color-secondary);
  color: var(--color-bg);
  width: 42px;
  height: 42px;
  transform: none;
}

.tile-body {
  grid-area: body;
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.tile-verb {
  font-size: clamp(1.375rem, 2.2vw, 1.75rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--color-text);
  line-height: 1.15;
  transition: font-size var(--d-view) var(--ease-out);
}

.tile-sub {
  font-size: 0.8125rem;
  color: var(--color-muted);
  font-weight: 400;
  transition: opacity var(--d-fast) var(--ease-out), margin var(--d-view) var(--ease-out);
}

.tile-preview {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 14px;
  max-height: 1000px;
  overflow: hidden;
  min-width: 0;
  transition:
    opacity var(--d-fast) var(--ease-out),
    max-height var(--d-view) var(--ease-out),
    margin var(--d-view) var(--ease-out);
}

.tile-preview--list {
  flex-direction: column;
  gap: 10px;
}

.preview-row {
  display: flex;
  flex-direction: column;
  gap: 1px;
  min-width: 0;
}

.preview-row strong {
  font-weight: 600;
  color: var(--color-text);
  font-size: 0.875rem;
  line-height: 1.3;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.preview-row em {
  font-style: normal;
  font-weight: 400;
  color: var(--color-muted);
  font-size: 0.75rem;
  line-height: 1.3;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.meet-logo {
  flex-shrink: 0;
  border-radius: 3px;
  display: inline-block;
  vertical-align: middle;
}

body[data-active] .tile-preview {
  opacity: 0;
  max-height: 0;
  margin-top: 0;
  pointer-events: none;
}

body[data-active] .tile-sub {
  opacity: 0.4;
}

/* Back affordance inside the active tile */

.tile-back-affordance {
  grid-area: back;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-muted);
  padding: 6px 12px;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  opacity: 0;
  transform: translateX(8px);
  pointer-events: none;
  transition:
    opacity var(--d-fast) var(--ease-out),
    transform var(--d-fast) var(--ease-out),
    color var(--d-fast) var(--ease-out),
    border-color var(--d-fast) var(--ease-out);
}

body[data-active="talk"]    .cluster[data-cluster="talk"]    .tile-back-affordance,
body[data-active="learn"]   .cluster[data-cluster="learn"]   .tile-back-affordance,
body[data-active="explore"] .cluster[data-cluster="explore"] .tile-back-affordance {
  opacity: 1;
  transform: translateX(0);
  pointer-events: auto;
  border-color: var(--color-hairline);
  background: var(--color-bg);
}

body[data-active="talk"]    .cluster[data-cluster="talk"]    .tile:hover .tile-back-affordance,
body[data-active="learn"]   .cluster[data-cluster="learn"]   .tile:hover .tile-back-affordance,
body[data-active="explore"] .cluster[data-cluster="explore"] .tile:hover .tile-back-affordance {
  color: var(--color-secondary);
  border-color: var(--color-secondary);
}

/* ── Panel reveal ────────────────────────── */

.panel {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows var(--d-view) var(--ease-out);
}

.panel-inner {
  overflow: hidden;
  min-height: 0;
  opacity: 0;
  background: var(--color-bg);
  border: 1px solid var(--color-secondary);
  border-top: none;
  border-bottom-left-radius: var(--radius-lg);
  border-bottom-right-radius: var(--radius-lg);
  padding: 0 28px;
  transition:
    opacity var(--d-fast) var(--ease-out),
    padding var(--d-view) var(--ease-out);
}

body[data-active="talk"]    .cluster[data-cluster="talk"]    .panel,
body[data-active="learn"]   .cluster[data-cluster="learn"]   .panel,
body[data-active="explore"] .cluster[data-cluster="explore"] .panel {
  grid-template-rows: 1fr;
}

body[data-active="talk"]    .cluster[data-cluster="talk"]    .panel-inner,
body[data-active="learn"]   .cluster[data-cluster="learn"]   .panel-inner,
body[data-active="explore"] .cluster[data-cluster="explore"] .panel-inner {
  opacity: 1;
  padding: 32px 28px 36px;
}

.panel[aria-hidden="true"] { /* keep accessible-tree consistent — content collapsed visually */ }

/* ── Channels (Talk panel) ───────────────── */

.channels {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

.channel {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px 20px;
  background: var(--color-bg);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
  transition:
    transform var(--d-fast) var(--ease-out),
    box-shadow var(--d-fast) var(--ease-out),
    border-color var(--d-fast) var(--ease-out);
}

.channel:hover,
.channel:focus-visible {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-secondary);
  outline: none;
}

.channel:active {
  transform: translateY(0) scale(0.99);
  transition-duration: 80ms;
}

.channel-icon {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  color: var(--color-secondary);
  flex-shrink: 0;
  transition: background var(--d-fast) var(--ease-out), color var(--d-fast) var(--ease-out);
}

.channel:hover .channel-icon,
.channel:focus-visible .channel-icon {
  background: var(--color-secondary);
  color: var(--color-bg);
}

.channel-body { display: flex; flex-direction: column; gap: 2px; min-width: 0; }

.channel-label {
  font-size: 0.6875rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-muted);
}

.channel-value {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text);
  letter-spacing: -0.005em;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.channel-flag {
  font-size: 0.625rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-muted);
  background: var(--color-surface);
  border: 1px solid var(--color-hairline);
  padding: 2px 6px;
  border-radius: 4px;
}

.channel--primary { border-color: var(--color-primary); }
.channel--primary .channel-icon { background: var(--color-primary-soft); color: var(--color-primary); }
.channel--primary:hover { border-color: var(--color-primary); box-shadow: 0 14px 32px rgba(64, 130, 109, 0.18); }
.channel--primary:hover .channel-icon { background: var(--color-primary); color: var(--color-bg); }

/* ── Learn panel: experience cards (unchanged structure) ─── */

.project-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-bottom: 36px;
}

.project-card {
  display: flex;
  flex-direction: column;
  padding: 26px;
  background: var(--color-bg);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.25s ease, border-color 0.25s ease, transform 0.25s ease;
  border-top: 3px solid var(--color-secondary);
}

.project-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-muted);
  border-top-color: var(--color-secondary);
  transform: translateY(-3px);
}

.card-static { display: block; }

.card-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 14px;
}

.card-tag {
  font-size: 0.6875rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-primary);
  background: var(--color-primary-soft);
  padding: 3px 10px;
  border-radius: 999px;
}

.card-year {
  font-size: 0.6875rem;
  color: var(--color-muted);
  font-variant-numeric: tabular-nums;
}

.card-role {
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.2;
  margin-bottom: 4px;
}

.card-company {
  font-size: 1.0625rem;
  font-weight: 500;
  color: var(--color-secondary);
  letter-spacing: -0.005em;
  margin-bottom: 18px;
}

.card-flip {
  position: relative;
  perspective: 1200px;
  margin-top: auto;
  flex-grow: 1;
  display: flex;
  align-items: stretch;
}

.card-flip-inner {
  position: relative;
  width: 100%;
  display: grid;
  transform-style: preserve-3d;
  transition: transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.card-flip.is-flipped .card-flip-inner {
  transform: rotateY(180deg);
}

.card-face {
  grid-area: 1 / 1;
  position: relative;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  padding-right: 40px;
}

.card-face--back { transform: rotateY(180deg); }

.card-desc {
  font-size: 0.875rem;
  color: var(--color-muted);
  line-height: 1.6;
  margin: 0;
}

.card-tech {
  display: flex;
  gap: 6px;
  list-style: none;
  flex-wrap: wrap;
  margin: 0;
}

.card-tech li {
  font-size: 0.6875rem;
  font-weight: 400;
  color: var(--color-muted);
  background: var(--color-surface);
  border: 1px solid var(--color-hairline);
  padding: 2px 8px;
  border-radius: 4px;
}

.card-spin {
  position: absolute;
  top: -4px;
  right: 0;
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  background: var(--color-bg);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-md);
  color: var(--color-muted);
  cursor: pointer;
  padding: 0;
  perspective: 200px;
  transition: color var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.card-spin:hover,
.card-spin:focus-visible {
  color: var(--color-secondary);
  border-color: var(--color-secondary);
  box-shadow: 0 2px 8px rgba(183, 73, 14, 0.15);
  outline: none;
}

.card-spin:focus-visible { box-shadow: 0 0 0 3px rgba(183, 73, 14, 0.25); }

.card-spin-icon {
  display: block;
  transform-style: preserve-3d;
  animation: card-spin-idle 4.5s ease-in-out infinite;
}

.card-spin:hover .card-spin-icon,
.card-spin:focus-visible .card-spin-icon {
  animation: card-spin-hover 1.4s cubic-bezier(0.4, 0, 0.2, 1) infinite;
}

.card-spin:active .card-spin-icon {
  animation: none;
  transform: rotateY(180deg);
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes card-spin-idle {
  0%, 100% { transform: rotateY(0deg); }
  50%      { transform: rotateY(14deg); }
}

@keyframes card-spin-hover {
  0%   { transform: rotateY(0deg); }
  45%  { transform: rotateY(55deg); }
  100% { transform: rotateY(0deg); }
}

/* ── Learn — Tooling / Domains / Education ── */

.learn-details {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  padding-top: 28px;
  border-top: 1px solid var(--color-hairline);
}

.detail-group { margin: 0; }

.detail-label {
  font-size: 0.6875rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-muted);
  margin-bottom: 12px;
}

.pill-list {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  list-style: none;
}

.pill-list li {
  font-size: 0.8125rem;
  font-weight: 400;
  color: var(--color-muted);
  background: var(--color-surface);
  border: 1px solid var(--color-hairline);
  padding: 5px 14px;
  border-radius: 999px;
  transition: all var(--transition);
}

.pill-list li:hover {
  border-color: var(--color-secondary);
  color: var(--color-text);
}

/* ── Explore panel: GitHub CTA + project badges ── */

.github-cta {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 20px 22px;
  background: var(--color-bg);
  border: 1px solid var(--color-text);
  border-radius: var(--radius-lg);
  margin-bottom: 22px;
  position: relative;
  overflow: hidden;
  transition:
    transform var(--d-fast) var(--ease-out),
    box-shadow var(--d-fast) var(--ease-out);
}

.github-cta:hover,
.github-cta:focus-visible {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  outline: none;
}

.github-cta-icon {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-lg);
  background: var(--color-text);
  color: var(--color-bg);
  flex-shrink: 0;
}

.github-cta-body {
  display: flex;
  flex-direction: column;
  gap: 2px;
  flex: 1;
  min-width: 0;
}

.github-cta-label {
  font-size: 0.6875rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-muted);
}

.github-cta-value {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text);
  letter-spacing: -0.005em;
}

.github-cta-arrow {
  display: grid;
  place-items: center;
  color: var(--color-muted);
  transition: transform var(--d-fast) var(--ease-out), color var(--d-fast) var(--ease-out);
}

.github-cta:hover .github-cta-arrow {
  color: var(--color-text);
  transform: translate(3px, -3px);
}

.project-badges {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.project-badge {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px 20px;
  background: var(--color-bg);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border-top: 3px solid var(--color-secondary);
  transition:
    transform var(--d-fast) var(--ease-out),
    box-shadow var(--d-fast) var(--ease-out),
    border-color var(--d-fast) var(--ease-out);
}

.project-badge:hover,
.project-badge:focus-visible {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-muted);
  border-top-color: var(--color-secondary);
  outline: none;
}

.project-badge-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.project-badge-head h3 {
  font-size: 1.0625rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.project-badge-head h3 {
  margin-right: auto;
}

.badge-status {
  font-size: 0.625rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 2px 7px;
  border-radius: 3px;
  border: 1px solid transparent;
  white-space: nowrap;
}

.badge-status--public {
  color: var(--color-primary);
  background: var(--color-primary-soft);
  border-color: var(--color-primary);
}

.badge-status--soon {
  color: var(--color-secondary);
  background: var(--color-secondary-soft);
  border-color: var(--color-secondary);
}

.project-badge .external {
  display: grid;
  place-items: center;
  color: var(--color-muted);
  transition: color var(--d-fast) var(--ease-out), transform var(--d-fast) var(--ease-out);
}

.project-badge:hover .external {
  color: var(--color-secondary);
  transform: translate(2px, -2px);
}

.project-badge-desc {
  font-size: 0.8125rem;
  color: var(--color-muted);
  line-height: 1.5;
}

.badge-tags {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
  list-style: none;
  margin-top: 4px;
}

.badge-tags li {
  font-size: 0.625rem;
  font-weight: 400;
  color: var(--color-muted);
  background: var(--color-surface);
  border: 1px solid var(--color-hairline);
  padding: 2px 7px;
  border-radius: 3px;
}

/* ── Intro choreography ──────────────────── */

@keyframes intro-up {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: translateY(0); }
}

body.has-intro .banner-name,
body.has-intro .banner-title,
body.has-intro .banner-about,
body.has-intro .cluster {
  opacity: 0;
  animation: intro-up 700ms var(--ease-out) forwards;
}

body.has-intro .banner-name  { animation-delay:   0ms; }
body.has-intro .banner-title { animation-delay: 140ms; }
body.has-intro .banner-about { animation-delay: 280ms; }
body.has-intro .cluster:nth-child(1) { animation-delay: 460ms; }
body.has-intro .cluster:nth-child(2) { animation-delay: 580ms; }
body.has-intro .cluster:nth-child(3) { animation-delay: 700ms; }

body.has-intro .banner-wrap { transition: none; }

/* ── Footer ──────────────────────────────── */

.footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 48px;
  border-top: 2px solid var(--color-secondary);
  font-size: 0.75rem;
  color: var(--color-muted);
  transition: border-color var(--transition), opacity var(--d-view) var(--ease-out);
  margin-top: auto;
}

body[data-active] .footer { opacity: 0.5; }

.footer-time { font-variant-numeric: tabular-nums; }

/* ── Responsive ──────────────────────────── */

@media (max-width: 960px) {
  .container { padding: 0 32px; }
  .footer { padding: 24px 32px; }

  .tiles {
    flex-direction: column;
  }
  .cluster { flex: 0 0 auto; }

  body[data-active="talk"]    .cluster[data-cluster="talk"],
  body[data-active="learn"]   .cluster[data-cluster="learn"],
  body[data-active="explore"] .cluster[data-cluster="explore"] {
    flex: 0 0 auto;
  }

  body[data-active] .cluster {
    flex: 0 0 0;
    margin: 0;
  }

  .project-grid { grid-template-columns: 1fr; }
  .learn-details { grid-template-columns: 1fr; gap: 24px; }
  .channels { grid-template-columns: 1fr; }
  .project-badges { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .container { padding: 0 24px; }
  .footer { padding: 20px 24px; }
  .stage-inner { padding-top: 28px; padding-bottom: 40px; gap: 32px; }
}

@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .footer { padding: 16px; }
  .banner-name { font-size: 2.25rem; }
  .channel { padding: 14px 16px; gap: 12px; }
  .channel-icon { width: 38px; height: 38px; }
  .channel-value { font-size: 0.9375rem; }
  .panel-inner { padding: 0 16px; }
  body[data-active] .panel-inner { padding: 24px 16px; }
}

/* ── Reduced motion ──────────────────────── */

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}