/* ==========================================================================
   Trillion AI Tech — design tokens + components
   Identity: "signal field / future workshop"
   ========================================================================== */

:root {
  /* Type scale — fluid */
  --text-xs: clamp(0.75rem, 0.72rem + 0.15vw, 0.8125rem);
  --text-sm: clamp(0.875rem, 0.84rem + 0.2vw, 0.9375rem);
  --text-base: clamp(1rem, 0.96rem + 0.2vw, 1.0625rem);
  --text-lg: clamp(1.125rem, 1rem + 0.6vw, 1.375rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.2vw, 2.125rem);
  --text-2xl: clamp(2rem, 1.3rem + 2.6vw, 3.25rem);
  --text-3xl: clamp(2.25rem, 1.35rem + 3vw, 3.875rem);

  /* Spacing — 4px rhythm */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Radii — hierarchy, not uniform bubbles */
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.625rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  /* Motion */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Layout */
  --content-narrow: 640px;
  --content-default: 1020px;
  --content-wide: 1320px;
  --gutter: clamp(1.25rem, 4vw, 4rem);

  /* Typography families */
  --font-display: 'Cabinet Grotesk', 'General Sans', 'Helvetica Neue', sans-serif;
  --font-body: 'Satoshi', 'Inter', 'Helvetica Neue', sans-serif;

  /* Tracking presets */
  --track-label: 0.16em;
}

/* -------------------------------------------------------------- DARK (default) */
:root,
[data-theme='dark'] {
  --color-bg: #070910;
  --color-bg-deep: #04060b;
  --color-surface: #0b0f18;
  --color-surface-2: #10151f;
  --color-surface-3: #161c28;
  --color-line: color-mix(in oklab, #8fa3c4 16%, transparent);
  --color-line-strong: color-mix(in oklab, #8fa3c4 30%, transparent);
  --color-text: #e6e9ef;
  --color-text-muted: #98a2b3;
  --color-text-faint: #626c7d;
  --color-accent: #f4762b;
  --color-accent-hover: #ff8b45;
  --color-accent-soft: color-mix(in oklab, #f4762b 16%, transparent);
  --color-accent-on: #10131a;
  --color-copper: #c98a5c;
  --color-grid: color-mix(in oklab, #7f97bd 12%, transparent);
  /* Instrument panels stay dark in both themes — a studio signature */
  --panel-bg: #04060b;
  --panel-line: color-mix(in oklab, #8fa3c4 18%, transparent);
  --panel-node: #6b7688;
  --shadow-sm: 0 1px 2px rgb(2 4 8 / 0.5);
  --shadow-md: 0 10px 30px rgb(2 4 8 / 0.55);
  --shadow-lg: 0 24px 60px rgb(2 4 8 / 0.6);
  color-scheme: dark;
}

/* -------------------------------------------------------------- LIGHT */
[data-theme='light'] {
  --color-bg: #f2f3f6;
  --color-bg-deep: #e8eaef;
  --color-surface: #fbfbfd;
  --color-surface-2: #f5f6f9;
  --color-surface-3: #eceef3;
  --color-line: color-mix(in oklab, #1b2431 16%, transparent);
  --color-line-strong: color-mix(in oklab, #1b2431 32%, transparent);
  --color-text: #0e1218;
  --color-text-muted: #4d5665;
  --color-text-faint: #7b8595;
  --color-accent: #ad4a12;
  --color-accent-hover: #8e3a0b;
  --color-accent-soft: color-mix(in oklab, #ad4a12 12%, transparent);
  --color-accent-on: #fdf7f2;
  --color-copper: #8a5330;
  --color-grid: color-mix(in oklab, #1b2431 10%, transparent);
  --panel-bg: #0c111b;
  --panel-line: color-mix(in oklab, #8fa3c4 22%, transparent);
  --panel-node: #8b96a8;
  --shadow-sm: 0 1px 2px rgb(16 22 32 / 0.06);
  --shadow-md: 0 8px 24px rgb(16 22 32 / 0.09);
  --shadow-lg: 0 20px 50px rgb(16 22 32 / 0.12);
  color-scheme: light;
}

/* ============================================================ primitives */

.wrap {
  width: 100%;
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.wrap--narrow {
  max-width: 860px;
}

.label {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: var(--track-label);
  font-weight: 600;
  color: var(--color-text-faint);
}

.label--accent {
  color: var(--color-accent);
}

.mono {
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

.display {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.025em;
}

.lede {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 56ch;
}

.rule {
  height: 1px;
  background: var(--color-line);
  border: 0;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 44px;
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.01em;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  text-decoration: none;
  white-space: nowrap;
}

.btn--primary {
  background: var(--color-accent);
  color: var(--color-accent-on);
}

.btn--primary:hover,
.btn--primary:focus-visible {
  background: var(--color-accent-hover);
  transform: translateY(-1px);
}

.btn--primary:active {
  transform: translateY(0);
}

.btn--ghost {
  border-color: var(--color-line-strong);
  color: var(--color-text);
  background: transparent;
}

.btn--ghost:hover,
.btn--ghost:focus-visible {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background: var(--color-accent-soft);
}

.btn--ghost:active {
  background: color-mix(in oklab, var(--color-accent) 22%, transparent);
}

.btn--block {
  width: 100%;
}

/* Text link with signal underline */
.tlink {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  min-height: 44px;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
  text-decoration: none;
  border-bottom: 1px solid var(--color-line-strong);
  padding-bottom: 2px;
}

.tlink:hover,
.tlink:focus-visible {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

.tlink__arrow {
  transition: transform var(--transition-interactive);
}

.tlink:hover .tlink__arrow {
  transform: translateX(3px);
}

/* Status pill */
.pill {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: var(--space-1) var(--space-3);
  border: 1px solid var(--color-line-strong);
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
  white-space: nowrap;
}

.pill__dot {
  width: 6px;
  height: 6px;
  border-radius: var(--radius-full);
  background: var(--color-accent);
}

/* ============================================================ header / nav */

.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: color-mix(in oklab, var(--color-bg) 86%, transparent);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-line);
}

.site-header__inner {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  min-height: 68px;
  justify-content: space-between;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  min-height: 44px;
}

.brand__mark {
  width: 30px;
  height: 30px;
  flex: none;
  color: var(--color-text);
}

.brand__mark .mark-accent {
  fill: var(--color-accent);
}

.brand__type {
  display: flex;
  flex-direction: column;
  line-height: 1;
}

.brand__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: -0.01em;
}

.brand__sub {
  font-size: 0.6875rem;
  letter-spacing: var(--track-label);
  text-transform: uppercase;
  color: var(--color-text-faint);
  margin-top: 3px;
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.nav__link {
  position: relative;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 var(--space-3);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  border-radius: var(--radius-sm);
}

.nav__link::after {
  content: '';
  position: absolute;
  left: var(--space-3);
  right: var(--space-3);
  bottom: 14px;
  height: 1px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-interactive);
}

.nav__link:hover,
.nav__link:focus-visible {
  color: var(--color-text);
}

.nav__link:hover::after {
  transform: scaleX(1);
}

.nav__link[aria-current='page'] {
  color: var(--color-text);
}

.nav__link[aria-current='page']::after {
  transform: scaleX(1);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  background: transparent;
}

.icon-btn:hover,
.icon-btn:focus-visible {
  color: var(--color-accent);
  border-color: var(--color-accent);
  background: var(--color-accent-soft);
}

.nav-toggle {
  display: none;
}

/* Mobile nav panel */
.mobile-nav {
  display: none;
  border-bottom: 1px solid var(--color-line);
  background: var(--color-surface);
}

.mobile-nav[data-open='true'] {
  display: block;
}

.mobile-nav__list {
  list-style: none;
  padding: var(--space-2) 0 var(--space-4);
}

.mobile-nav__list a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 52px;
  padding: 0 var(--space-1);
  font-size: var(--text-base);
  font-weight: 500;
  text-decoration: none;
  border-bottom: 1px solid var(--color-line);
  color: var(--color-text-muted);
}

.mobile-nav__list a[aria-current='page'] {
  color: var(--color-accent);
}

.mobile-nav__list a span {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

@media (max-width: 900px) {
  .nav,
  .header-actions .btn {
    display: none;
  }

  .nav-toggle {
    display: inline-flex;
  }
}

/* ============================================================ views */

.view {
  display: none;
}

.view.is-active {
  display: block;
}

.section {
  padding-block: clamp(var(--space-16), 8vw, var(--space-32));
  border-top: 1px solid var(--color-line);
}

.section--tight {
  padding-block: clamp(var(--space-12), 5vw, var(--space-20));
}

.section__head {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: minmax(0, 1fr);
  margin-bottom: var(--space-12);
}

@media (min-width: 900px) {
  .section__head {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1fr);
    gap: var(--space-16);
    align-items: end;
  }
}

.section__title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.section__index {
  font-size: var(--text-xs);
  letter-spacing: var(--track-label);
  color: var(--color-accent);
  font-weight: 600;
  display: block;
  margin-bottom: var(--space-3);
}

/* ============================================================ hero */

.hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(var(--space-12), 7vw, var(--space-24)) clamp(var(--space-12), 6vw, var(--space-20));
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: linear-gradient(var(--color-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-grid) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: radial-gradient(120% 90% at 70% 10%, #000 15%, transparent 78%);
  pointer-events: none;
}

.hero__inner {
  position: relative;
  display: grid;
  gap: clamp(var(--space-10), 5vw, var(--space-16));
  align-items: center;
}

@media (min-width: 1000px) {
  .hero__inner {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  }
}

.hero__eyebrow {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2) var(--space-3);
  margin-bottom: var(--space-6);
}

.hero__title {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 0.96;
}

.hero__title em {
  font-style: normal;
  color: var(--color-accent);
}

.hero__title .thin {
  font-weight: 300;
  color: var(--color-text-muted);
}

.hero__copy {
  margin-top: var(--space-6);
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 48ch;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-4) var(--space-8);
  margin-top: var(--space-10);
}

.hero__ledger {
  margin-top: clamp(var(--space-10), 4vw, var(--space-16));
  display: grid;
  gap: var(--space-1);
  border-top: 1px solid var(--color-line);
  padding-top: var(--space-4);
  max-width: 46ch;
}

.hero__ledger div {
  display: flex;
  justify-content: space-between;
  gap: var(--space-4);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-faint);
  padding-block: var(--space-2);
  border-bottom: 1px dotted var(--color-line);
}

.hero__ledger b {
  color: var(--color-text-muted);
  font-weight: 600;
}

/* canvas frame */
.signal {
  position: relative;
  border: 1px solid var(--panel-line);
  border-radius: var(--radius-lg);
  background: linear-gradient(160deg, color-mix(in oklab, var(--panel-bg) 80%, #223049), var(--panel-bg));
  padding: var(--space-3);
  box-shadow: var(--shadow-md);
}

.signal__canvas {
  width: 100%;
  aspect-ratio: 4 / 3.1;
  border-radius: var(--radius-md);
  display: block;
}

.signal__meta {
  color: var(--panel-node);
  position: absolute;
  left: var(--space-5);
  bottom: var(--space-5);
  display: flex;
  gap: var(--space-4);
  font-size: 0.6875rem;
  letter-spacing: var(--track-label);
  text-transform: uppercase;
  pointer-events: none;
}

.signal__corner {
  position: absolute;
  width: 14px;
  height: 14px;
  border: 1px solid var(--color-accent);
  opacity: 0.7;
}

.signal__corner--tl {
  top: -1px;
  left: -1px;
  border-right: 0;
  border-bottom: 0;
}

.signal__corner--br {
  bottom: -1px;
  right: -1px;
  border-left: 0;
  border-top: 0;
}

/* ============================================================ field notes rail */

.rail {
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
  background: var(--color-surface);
}

.rail__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-3);
  padding-block: var(--space-5);
  border-bottom: 1px dashed var(--color-line);
}

.rail__list {
  list-style: none;
  display: grid;
}

@media (min-width: 860px) {
  .rail__list {
    grid-template-columns: 1.15fr 0.95fr 1.05fr 0.85fr;
  }
}

.rail__item {
  padding: var(--space-8) var(--space-6) var(--space-10) 0;
  border-bottom: 1px solid var(--color-line);
  position: relative;
}

@media (min-width: 860px) {
  .rail__item {
    border-bottom: 0;
    border-right: 1px solid var(--color-line);
    padding-right: var(--space-8);
  }

  .rail__item:last-child {
    border-right: 0;
  }

  .rail__item:nth-child(even) {
    padding-top: var(--space-16);
  }
}

.rail__num {
  font-size: var(--text-xs);
  letter-spacing: var(--track-label);
  color: var(--color-accent);
  font-weight: 600;
}

.rail__title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  margin: var(--space-3) 0 var(--space-2);
  letter-spacing: -0.01em;
}

.rail__item p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  max-width: 32ch;
}

.rail__ticks {
  display: flex;
  gap: 4px;
  margin-top: var(--space-5);
}

.rail__ticks i {
  display: block;
  width: 2px;
  height: 12px;
  background: var(--color-line-strong);
}

.rail__ticks i:first-child {
  background: var(--color-accent);
  height: 18px;
}

/* ============================================================ labs */

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  align-items: center;
  margin-bottom: var(--space-8);
  padding-bottom: var(--space-5);
  border-bottom: 1px solid var(--color-line);
}

.filter {
  min-height: 44px;
  padding: 0 var(--space-5);
  font-size: var(--text-sm);
  font-weight: 600;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
  background: transparent;
}

.filter:hover,
.filter:focus-visible {
  color: var(--color-text);
  border-color: var(--color-line-strong);
}

.filter[aria-pressed='true'] {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-accent-on);
}

.filters__count {
  margin-left: auto;
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-faint);
}

.manifest {
  list-style: none;
  display: grid;
  gap: var(--space-5);
}

@media (min-width: 940px) {
  .manifest {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .project {
    grid-column: span 3;
  }

  .project--wide {
    grid-column: span 6;
  }

  .project--third {
    grid-column: span 2;
  }
}

.project {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  padding: var(--space-6);
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.project::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(70% 60% at 92% 6%, var(--color-accent-soft), transparent 70%);
  opacity: 0;
  transition: opacity var(--transition-interactive);
  pointer-events: none;
}

.project:hover::after,
.project:focus-within::after {
  opacity: 1;
}

.project:hover {
  border-color: var(--color-line-strong);
  transform: translateY(-2px);
  transition: transform var(--transition-interactive), border-color var(--transition-interactive);
}

.project[hidden] {
  display: none;
}

.project__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.project__cat {
  font-size: var(--text-xs);
  letter-spacing: var(--track-label);
  text-transform: uppercase;
  font-weight: 600;
  color: var(--color-text-faint);
}

.project__title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  letter-spacing: -0.01em;
}

.project__title small {
  display: block;
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-copper);
  margin-top: var(--space-2);
}

.project p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.project__foot {
  margin-top: auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding-top: var(--space-4);
  border-top: 1px dashed var(--color-line);
}

.project--wide {
  background: linear-gradient(150deg, var(--color-surface-2), var(--color-surface));
}

@media (min-width: 940px) {
  .project--wide {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: var(--space-10);
    padding: var(--space-10);
    align-items: center;
  }

  .project--wide .project__foot {
    border-top: 0;
    padding-top: 0;
    justify-content: flex-start;
    gap: var(--space-6);
  }
}

.project__sched {
  list-style: none;
  display: grid;
  gap: var(--space-2);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-faint);
}

.project__sched li {
  display: flex;
  gap: var(--space-3);
  padding-bottom: var(--space-2);
  border-bottom: 1px dotted var(--color-line);
}

.project__sched li::before {
  content: '';
  width: 8px;
  height: 8px;
  flex: none;
  margin-top: 5px;
  border: 1px solid var(--color-accent);
}

.empty-state {
  padding: var(--space-12);
  text-align: center;
  border: 1px dashed var(--color-line-strong);
  border-radius: var(--radius-lg);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

/* ============================================================ game console */

.console {
  display: grid;
  gap: clamp(var(--space-6), 3vw, var(--space-10));
}

@media (min-width: 980px) {
  .console {
    grid-template-columns: minmax(0, 620px) minmax(280px, 1fr);
    align-items: start;
    justify-content: start;
  }
}

.console__stage {
  position: relative;
  max-width: 620px;
  border: 1px solid var(--panel-line);
  border-radius: var(--radius-lg);
  background: linear-gradient(170deg, color-mix(in oklab, var(--panel-bg) 80%, #223049), var(--panel-bg));
  padding: var(--space-3);
  box-shadow: var(--shadow-md);
}

#game-canvas {
  width: 100%;
  max-width: 560px;
  aspect-ratio: 1 / 1;
  margin-inline: auto;
  border-radius: var(--radius-md);
  touch-action: manipulation;
}

.console__overlay {
  color: #e6e9ef;
  position: absolute;
  inset: var(--space-3);
  display: grid;
  place-content: center;
  gap: var(--space-4);
  text-align: center;
  padding: var(--space-6);
  background: color-mix(in oklab, var(--panel-bg) 86%, transparent);
  backdrop-filter: blur(3px);
  border-radius: var(--radius-md);
}

.console__overlay[hidden] {
  display: none;
}

.console__overlay h3 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
}

.console__overlay p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-inline: auto;
}

.hud {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
  max-width: 620px;
}

.hud__cell {
  flex: 1 1 90px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface);
}

.hud__cell dt {
  font-size: 0.6875rem;
  letter-spacing: var(--track-label);
  text-transform: uppercase;
  color: var(--color-text-faint);
}

.hud__cell dd {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  margin-top: var(--space-1);
}

.console__controls {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-4);
}

.dpad {
  max-width: 620px;
  display: grid;
  grid-template-columns: repeat(3, 52px);
  grid-template-rows: repeat(2, 52px);
  gap: var(--space-2);
  margin-top: var(--space-4);
  justify-content: start;
}

.dpad button {
  border: 1px solid var(--color-line-strong);
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  background: var(--color-surface);
  display: grid;
  place-items: center;
  min-height: 44px;
}

.dpad button:hover,
.dpad button:focus-visible,
.dpad button:active {
  color: var(--color-accent);
  border-color: var(--color-accent);
  background: var(--color-accent-soft);
}

.dpad__up {
  grid-column: 2;
}

.dpad__left {
  grid-column: 1;
  grid-row: 2;
}

.dpad__down {
  grid-column: 2;
  grid-row: 2;
}

.dpad__right {
  grid-column: 3;
  grid-row: 2;
}

.console__aside h3 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  margin-bottom: var(--space-3);
}

.console__aside ol {
  margin: 0 0 var(--space-6) var(--space-5);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  display: grid;
  gap: var(--space-2);
}

.keys {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
}

kbd {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  padding: var(--space-1) var(--space-2);
  border: 1px solid var(--color-line-strong);
  border-bottom-width: 2px;
  border-radius: var(--radius-sm);
  color: var(--color-text-muted);
}

.note {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  border-left: 0;
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-line);
}

/* ============================================================ studio */

.studio {
  display: grid;
  gap: clamp(var(--space-8), 4vw, var(--space-16));
}

@media (min-width: 980px) {
  .studio {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: start;
  }
}

.studio p + p {
  margin-top: var(--space-5);
}

.principles {
  list-style: none;
  display: grid;
  gap: var(--space-1);
  counter-reset: p;
}

.principles li {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: var(--space-4);
  padding-block: var(--space-5);
  border-top: 1px solid var(--color-line);
  align-items: start;
}

.principles li::before {
  counter-increment: p;
  content: counter(p, decimal-leading-zero);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-accent);
  font-weight: 600;
  padding-top: 4px;
}

.principles strong {
  display: block;
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 700;
  margin-bottom: var(--space-1);
}

.principles span {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.triad {
  display: grid;
  gap: var(--space-4);
  margin-top: clamp(var(--space-10), 4vw, var(--space-16));
}

@media (min-width: 760px) {
  .triad {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.triad__cell {
  padding: var(--space-6);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
}

.triad__cell:nth-child(2) {
  background: var(--color-surface-2);
}

.triad__word {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  letter-spacing: -0.025em;
}

.triad__cell:nth-child(1) .triad__word {
  color: var(--color-accent);
}

.triad__cell p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-2);
}

/* ============================================================ contact */

.contact {
  display: grid;
  gap: clamp(var(--space-8), 4vw, var(--space-16));
}

@media (min-width: 980px) {
  .contact {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.75fr);
    align-items: start;
  }
}

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

.field {
  display: grid;
  gap: var(--space-2);
}

.field > label {
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--color-text-muted);
}

.field input,
.field select,
.field textarea {
  min-height: 48px;
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-base);
  color: var(--color-text);
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
}

.field textarea {
  min-height: 140px;
  resize: vertical;
}

.field input:hover,
.field select:hover,
.field textarea:hover {
  border-color: var(--color-line-strong);
}

.field input:focus-visible,
.field select:focus-visible,
.field textarea:focus-visible {
  border-color: var(--color-accent);
}

.field input[aria-invalid='true'],
.field textarea[aria-invalid='true'],
.field select[aria-invalid='true'] {
  border-color: var(--color-accent);
  background: color-mix(in oklab, var(--color-accent) 7%, var(--color-surface));
}

.field__error {
  font-size: var(--text-xs);
  color: var(--color-accent);
  min-height: 1em;
  font-weight: 600;
}

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

@media (min-width: 700px) {
  .form__row {
    grid-template-columns: 1fr 1fr;
  }
}

.form__submit {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-4);
}

.form__hint {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  max-width: 44ch;
}

.confirm {
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-lg);
  background: color-mix(in oklab, var(--color-accent) 8%, var(--color-surface));
  padding: var(--space-6);
  display: grid;
  gap: var(--space-3);
}

.confirm[hidden] {
  display: none;
}

.confirm h3 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
}

.confirm p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.contact__aside {
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  background: var(--color-surface);
  display: grid;
  gap: var(--space-5);
}

.contact__aside h3 {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 700;
  letter-spacing: 0.02em;
}

.contact__aside dl {
  display: grid;
  gap: var(--space-4);
}

.contact__aside dt {
  font-size: 0.6875rem;
  letter-spacing: var(--track-label);
  text-transform: uppercase;
  color: var(--color-text-faint);
}

.contact__aside dd {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-1);
}

.contact__aside a {
  color: var(--color-accent);
  text-decoration: none;
  border-bottom: 1px solid color-mix(in oklab, var(--color-accent) 45%, transparent);
}

.contact__aside a:hover {
  border-bottom-color: var(--color-accent);
}

/* ============================================================ footer */

.site-footer {
  border-top: 1px solid var(--color-line);
  background: var(--color-surface);
  padding-block: clamp(var(--space-12), 5vw, var(--space-20)) var(--space-8);
}

.footer__grid {
  display: grid;
  gap: clamp(var(--space-8), 4vw, var(--space-12));
}

@media (min-width: 860px) {
  .footer__grid {
    grid-template-columns: minmax(0, 1.4fr) repeat(3, minmax(0, 1fr));
  }
}

.footer__col h4 {
  font-size: var(--text-xs);
  letter-spacing: var(--track-label);
  text-transform: uppercase;
  color: var(--color-text-faint);
  margin-bottom: var(--space-4);
  font-weight: 600;
}

.footer__col ul {
  list-style: none;
  display: grid;
  gap: var(--space-1);
}

.footer__col a {
  display: inline-flex;
  align-items: center;
  min-width: 44px;
  min-height: 44px;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
}

.footer__col a:hover,
.footer__col a:focus-visible {
  color: var(--color-accent);
}

.footer__col li span {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  font-size: var(--text-sm);
  color: var(--color-text-faint);
}

.footer__wordmark {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-3);
}

.footer__note {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  max-width: 40ch;
}

.footer__bar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3) var(--space-6);
  justify-content: space-between;
  align-items: center;
  margin-top: clamp(var(--space-10), 4vw, var(--space-16));
  padding-top: var(--space-5);
  border-top: 1px solid var(--color-line);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  letter-spacing: 0.04em;
}

/* ============================================================ misc */

.cta-band {
  display: grid;
  gap: var(--space-6);
  padding: clamp(var(--space-8), 4vw, var(--space-12));
  border: 1px solid var(--color-line-strong);
  border-radius: var(--radius-xl);
  background: linear-gradient(120deg, var(--color-surface-2), var(--color-surface));
  align-items: center;
}

@media (min-width: 860px) {
  .cta-band {
    grid-template-columns: minmax(0, 1fr) auto;
  }
}

.cta-band h2 {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.cta-band p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-3);
}

.view-head {
  padding-block: clamp(var(--space-12), 6vw, var(--space-20)) var(--space-8);
}

.view-head__title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  letter-spacing: -0.03em;
}

.view-head__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-top: var(--space-6);
}

/* Route-change focus is moved programmatically to the section heading so screen
   readers announce the new view. The heading is not an interactive control, so the
   visible ring is suppressed (standard practice for tabindex="-1" route targets) —
   every real control keeps its focus ring. */
.view-head__title:focus,
.view-head__title:focus-visible,
.section__title:focus,
.section__title:focus-visible,
.hero__title:focus,
.hero__title:focus-visible {
  outline: none;
}