/* ============================================================
   gamicron design system — "studio terminal"
   Dark-first, light theme via html[data-theme="light"].
   No build step, no dependencies.
   ============================================================ */

:root {
  --bg: #070b10;
  --bg-glow-1: rgba(45, 212, 191, 0.07);
  --bg-glow-2: rgba(245, 185, 94, 0.05);
  --grid-line: rgba(255, 255, 255, 0.028);
  --surface: rgba(255, 255, 255, 0.035);
  --surface-strong: #0e151d;
  --surface-muted: rgba(255, 255, 255, 0.055);
  --text: #e6edf3;
  --muted: #93a4b4;
  --border: rgba(255, 255, 255, 0.1);
  --border-strong: rgba(255, 255, 255, 0.16);
  --accent: #2dd4bf;
  --accent-strong: #7df0e0;
  --accent-soft: rgba(45, 212, 191, 0.12);
  --amber: #f5b95e;
  --available: rgba(45, 212, 191, 0.14);
  --available-text: #6ee7d6;
  --development: rgba(96, 165, 250, 0.14);
  --development-text: #93c5fd;
  --coming: rgba(192, 132, 252, 0.14);
  --coming-text: #d8b4fe;
  --logo-bg: #ffffff;
  --term-bg: #0a1017;
  --shadow-soft: 0 18px 40px rgba(0, 0, 0, 0.35);
  --shadow-strong: 0 28px 64px rgba(0, 0, 0, 0.5);
  --radius: 24px;
  --radius-sm: 18px;
  --radius-xs: 12px;
  --max-width: 1160px;
  --space-1: 0.5rem;
  --space-2: 0.75rem;
  --space-3: 1rem;
  --space-4: 1.5rem;
  --space-5: 2rem;
  --space-6: 3rem;
  --space-7: 4.5rem;
  --space-8: 6rem;
  --font-mono: "SF Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --font-display: "Tektur", "Avenir Next", Avenir, "Segoe UI", sans-serif;
  color-scheme: dark;
}

html[data-theme="light"] {
  --bg: #f3f6f8;
  --bg-glow-1: rgba(14, 118, 110, 0.07);
  --bg-glow-2: rgba(245, 185, 94, 0.1);
  --grid-line: rgba(16, 28, 40, 0.035);
  --surface: rgba(255, 255, 255, 0.82);
  --surface-strong: #ffffff;
  --surface-muted: #eef3f6;
  --text: #16222e;
  --muted: #5b6b7a;
  --border: rgba(16, 28, 40, 0.12);
  --border-strong: rgba(16, 28, 40, 0.22);
  --accent: #0e766e;
  --accent-strong: #095e58;
  --accent-soft: rgba(14, 118, 110, 0.1);
  --amber: #b97f1f;
  --available: #dff4ea;
  --available-text: #176544;
  --development: #e5effa;
  --development-text: #315d8f;
  --coming: #ece8ff;
  --coming-text: #5a4fb0;
  --logo-bg: transparent;
  --term-bg: #101820;
  --shadow-soft: 0 18px 40px rgba(16, 28, 40, 0.08);
  --shadow-strong: 0 24px 56px rgba(16, 28, 40, 0.12);
  color-scheme: light;
}

/* Cross-document view transitions (progressive enhancement) */
@view-transition {
  navigation: auto;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 5.5rem; /* clear sticky header on hash navigation */
}

body {
  margin: 0;
  color: var(--text);
  font-family:
    Roboto,
    "Segoe UI",
    "Helvetica Neue",
    Helvetica,
    sans-serif;
  line-height: 1.65;
  background-color: var(--bg);
  background-image:
    radial-gradient(48rem 32rem at 12% -4%, var(--bg-glow-1), transparent 60%),
    radial-gradient(40rem 28rem at 88% 12%, var(--bg-glow-2), transparent 60%),
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 100% 100%, 100% 100%, 44px 44px, 44px 44px;
  background-attachment: fixed;
  transition: background-color 300ms ease, color 300ms ease;
}

::selection {
  background: var(--accent);
  color: #06211d;
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: var(--accent);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.15em;
}

a:hover {
  color: var(--accent-strong);
}

a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 4px;
  border-radius: 4px;
}

.skip-link {
  position: absolute;
  top: -3rem;
  left: 1rem;
  z-index: 100;
  background: var(--surface-strong);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.65rem 1rem;
}

.skip-link:focus {
  top: 1rem;
}

.container {
  width: min(calc(100% - 2rem), var(--max-width));
  margin: 0 auto;
}

.narrow {
  width: min(calc(100% - 2rem), 860px);
}

.section {
  padding: var(--space-6) 0;
}

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

/* ---------------- header / footer ---------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.header-inner,
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: 1rem 0;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-shrink: 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
  color: var(--text);
  text-decoration: none;
  font-size: 0.84rem;
  font-weight: 700;
}

.brand-logo {
  width: auto;
  height: 2.3rem;
  max-width: none;
  flex: 0 0 auto;
  background: var(--logo-bg);
  border-radius: 8px;
}

.brand-title {
  display: inline-flex;
  align-items: baseline;
  gap: 0.05em;
  font-family: var(--font-display);
  font-size: 1.43rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: none;
}

.brand-dot {
  color: #ff5347;
}

.site-nav,
.footer-nav,
.anchor-nav,
.hero-actions,
.hero-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
}

.header-inner .site-nav {
  margin-left: auto;
}

.site-nav a,
.footer-nav a,
.anchor-nav a {
  color: var(--muted);
  text-decoration: none;
}

.site-nav a:hover,
.footer-nav a:hover {
  color: var(--text);
}

.site-nav a[aria-current="page"] {
  color: var(--text);
  font-weight: 700;
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.4rem;
  height: 2.4rem;
  padding: 0;
  font-size: 1.05rem;
  line-height: 1;
  color: var(--muted);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  cursor: pointer;
  transition: color 150ms ease, border-color 150ms ease, transform 150ms ease;
}

.theme-toggle:hover {
  color: var(--text);
  border-color: var(--border-strong);
  transform: rotate(20deg);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 2.4rem;
  height: 2.4rem;
  padding: 0.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  transition: border-color 150ms ease;
}

.nav-toggle:hover {
  border-color: var(--border-strong);
}

.nav-toggle span {
  display: block;
  height: 2px;
  background: var(--text);
  border-radius: 1px;
  transition: transform 220ms ease, opacity 220ms ease;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(10px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-10px) rotate(-45deg);
}

.site-footer {
  margin-top: var(--space-6);
  border-top: 1px solid var(--border);
  background: var(--surface);
}

.footer-title {
  margin: 0 0 0.25rem;
  font-size: 1rem;
  font-weight: 700;
}

/* ---------------- typography ---------------- */

.eyebrow {
  margin: 0 0 var(--space-2);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.eyebrow::before {
  content: "// ";
  color: var(--muted);
}

h1,
h2,
h3 {
  margin: 0 0 var(--space-3);
  line-height: 1.06;
  font-weight: 700;
  letter-spacing: -0.03em;
}

h1 {
  font-size: clamp(2.6rem, 5vw, 4.6rem);
  max-width: 15ch;
}

h2 {
  font-size: clamp(1.5rem, 2.5vw, 2.15rem);
}

h3 {
  font-size: 1.16rem;
}

.grad {
  background: linear-gradient(92deg, var(--accent) 0%, var(--amber) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

p,
li {
  font-size: 1rem;
}

.lead {
  max-width: 42rem;
  font-size: clamp(1.08rem, 2vw, 1.3rem);
  color: var(--muted);
}

.body-copy,
.section-heading p,
.footer-copy,
.small-note,
.info-panel p,
.support-panel p,
.policy-card p,
.faq-item p,
.mini-list,
.muted {
  color: var(--muted);
}

.section-heading {
  margin-bottom: var(--space-5);
}

.section-linkout {
  margin: var(--space-4) 0 0;
}

/* ---------------- links & buttons ---------------- */

.button-link,
.text-link,
.back-link {
  font-weight: 700;
}

.button-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.9rem;
  padding: 0.75rem 1.3rem;
  border-radius: 999px;
  background: var(--accent);
  color: #06211d;
  text-decoration: none;
  transition: transform 150ms ease, box-shadow 150ms ease, background 150ms ease;
}

.button-link:hover {
  color: #06211d;
  background: var(--accent-strong);
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(45, 212, 191, 0.25);
}

.button-link.ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border-strong);
  box-shadow: none;
}

.button-link.ghost:hover {
  border-color: var(--accent);
  color: var(--accent-strong);
  box-shadow: none;
}

.back-link {
  display: inline-block;
  margin-bottom: 1rem;
}

/* ---------------- hero (shared shells) ---------------- */

.hero {
  padding-top: var(--space-7);
  padding-bottom: var(--space-7);
}

.hero-shell,
.app-hero-panel {
  display: grid;
  gap: var(--space-5);
  padding: clamp(1.5rem, 3vw, 2.5rem);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 32px;
  box-shadow: var(--shadow-strong);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.hero-panel,
.section-band,
.app-card,
.info-panel,
.support-panel,
.policy-card {
  padding: var(--space-4);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-soft);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.hero-panel {
  background: var(--surface-muted);
}

.panel-label {
  margin: 0 0 1rem;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.summary-row {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  align-items: start;
}

.summary-row-principle {
  grid-template-columns: 1fr;
  gap: 0.35rem;
}

.summary-row-principle b {
  display: block;
  font-size: 1.05rem;
  line-height: 1.2;
}

.summary-row + .summary-row {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}

.summary-row span {
  display: inline-flex;
  width: 2.25rem;
  height: 2.25rem;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-weight: 700;
}

.summary-row p,
.section-band p {
  margin: 0;
}

.section-band p {
  color: var(--muted);
}

/* ---------------- stats ---------------- */

.stat-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-3);
  margin-top: var(--space-5);
}

.stat {
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
}

.stat b {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  line-height: 1.1;
  color: var(--accent-strong);
}

.stat span {
  color: var(--muted);
  font-size: 0.88rem;
}

/* ---------------- terminal ---------------- */

.term {
  overflow: hidden;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  background: var(--term-bg);
  box-shadow: var(--shadow-strong);
  font-family: var(--font-mono);
}

.term-bar {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.7rem 1rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  color: #8b9bab;
  font-size: 0.74rem;
  letter-spacing: 0.08em;
}

.term-bar i {
  width: 0.72rem;
  height: 0.72rem;
  border-radius: 50%;
  background: #2f3b47;
}

.term-bar i:nth-child(1) { background: #ff5f57; }
.term-bar i:nth-child(2) { background: #febc2e; }
.term-bar i:nth-child(3) { background: #28c840; }

.term-bar span {
  margin-left: 0.5rem;
}

.term-body {
  margin: 0;
  padding: 1.1rem 1.2rem 1.3rem;
  min-height: 19.5em;
  color: #c7d6e2;
  font-size: 0.84rem;
  line-height: 1.75;
  white-space: pre-wrap;
  word-break: break-word;
}

.term-body .cursor {
  display: inline-block;
  width: 0.55em;
  height: 1.05em;
  margin-left: 1px;
  vertical-align: text-bottom;
  background: var(--accent);
  animation: blink 1.1s steps(1) infinite;
}

@keyframes blink {
  50% { opacity: 0; }
}

/* ---------------- grids & cards ---------------- */

.app-grid,
.screenshot-grid,
.two-column,
.app-hero {
  display: grid;
  gap: var(--space-4);
}

.app-grid {
  grid-template-columns: 1fr;
}

.app-card {
  display: flex;
  flex-direction: column;
  min-height: 100%;
  transition:
    transform 180ms ease,
    box-shadow 180ms ease,
    border-color 180ms ease;
}

.app-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-strong);
  border-color: rgba(45, 212, 191, 0.45);
}

.app-card-link {
  display: flex;
  flex: 1;
  flex-direction: column;
  min-height: 100%;
  color: inherit;
  text-decoration: none;
}

.app-card-link:hover {
  color: inherit;
}

.app-card-cta {
  align-self: flex-end;
}

.accent-card {
  background: linear-gradient(180deg, var(--surface-muted), var(--accent-soft));
}

.app-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.app-card-icon {
  width: 72px;
  height: 72px;
  border-radius: 20px;
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.35);
}

.app-card-shot {
  width: 100%;
  height: 220px;
  object-fit: cover;
  object-position: center top;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: var(--surface-muted);
  margin-bottom: 1rem;
}

.app-card h2,
.app-card h3 {
  font-size: 1.5rem;
}

.mini-list,
.feature-list,
.link-list {
  padding-left: 1.15rem;
}

.mini-list {
  margin-top: 0;
  margin-bottom: auto;
}

/* ---------------- badges & chips ---------------- */

.status-badge,
.meta-chip {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 0.38rem 0.8rem;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.status-badge {
  border: 1px solid currentColor;
}

.status-available {
  background: var(--available);
  color: var(--available-text);
}

.status-development {
  background: var(--development);
  color: var(--development-text);
}

.status-coming {
  background: var(--coming);
  color: var(--coming-text);
}

.meta-chip {
  background: var(--surface-muted);
  color: var(--muted);
  border: 1px solid var(--border);
}

.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: var(--space-3) 0;
  padding: 0;
  list-style: none;
}

.chip {
  display: inline-flex;
  align-items: center;
  padding: 0.28rem 0.65rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.02em;
}

/* ---------------- feature rows (selected work) ---------------- */

.feature-row {
  display: grid;
  gap: var(--space-5);
  align-items: center;
  padding: var(--space-5) 0;
}

.feature-row + .feature-row {
  border-top: 1px solid var(--border);
}

.feature-copy .status-badge {
  margin-bottom: var(--space-3);
}

.feature-copy h3 {
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 3vw, 2.4rem);
  letter-spacing: 0;
}

.feature-copy p {
  color: var(--muted);
  max-width: 38rem;
}

.feature-media {
  display: flex;
  justify-content: center;
}

/* CSS phone frame */
.phone {
  position: relative;
  width: min(280px, 78vw);
  padding: 12px;
  border-radius: 44px;
  background: linear-gradient(160deg, #232c36, #0c1218);
  border: 1px solid var(--border-strong);
  box-shadow: var(--shadow-strong), inset 0 0 0 2px rgba(255, 255, 255, 0.05);
  transition: transform 400ms ease;
}

.phone::before {
  content: "";
  position: absolute;
  top: 22px;
  left: 50%;
  transform: translateX(-50%);
  width: 86px;
  height: 22px;
  border-radius: 12px;
  background: #06090d;
  z-index: 2;
}

.phone img {
  width: 100%;
  border-radius: 32px;
  background: #f7f9fb;
}

.feature-row:hover .phone {
  transform: rotate(-1.4deg) translateY(-6px);
}

/* ---------------- marquee ---------------- */

.marquee {
  overflow: hidden;
  padding: var(--space-3) 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
}

.marquee-track {
  display: flex;
  gap: 3rem;
  width: max-content;
  animation: marquee 46s linear infinite;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  white-space: nowrap;
}

.marquee-track span::after {
  content: "·";
  margin-left: 3rem;
  color: var(--accent);
}

@keyframes marquee {
  to { transform: translateX(-50%); }
}

/* ---------------- principles (numbered manifesto) ---------------- */

.principles {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0;
}

.principle {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-4);
  align-items: baseline;
  padding: var(--space-4) 0;
  border-top: 1px solid var(--border);
}

.principle:last-child {
  border-bottom: 1px solid var(--border);
}

.principle i {
  font-family: var(--font-display);
  font-style: normal;
  font-size: 1.4rem;
  color: var(--accent);
}

.principle b {
  display: block;
  font-size: 1.12rem;
}

.principle p {
  margin: 0.2rem 0 0;
  color: var(--muted);
}

/* ---------------- screenshots ---------------- */

.screenshot-grid img {
  width: 100%;
  border-radius: 28px;
  border: 1px solid var(--border);
  background: var(--surface-muted);
  box-shadow: var(--shadow-soft);
  transition: transform 250ms ease, box-shadow 250ms ease;
}

.screenshot-grid img:hover {
  transform: scale(1.02);
  box-shadow: var(--shadow-strong);
}

.screenshot-grid figure {
  margin: 0;
}

.screenshot-grid figcaption {
  margin-top: 0.6rem;
  font-size: 0.88rem;
}

/* ---------------- misc panels ---------------- */

.policy-card h3 {
  margin-top: 1.5rem;
}

.anchor-nav {
  margin: 1.5rem 0 1rem;
}

.anchor-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 2.5rem;
  padding: 0.4rem 0.9rem;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--border);
}

.anchor-nav a:hover {
  border-color: var(--accent);
  color: var(--accent-strong);
}

.faq-item + .faq-item,
.policy-card + .policy-card,
.support-panel + .support-panel {
  margin-top: var(--space-4);
}

/* ---------------- policy stage (privacy page) ---------------- */

/* no-JS fallback: panels stack vertically */
.policy-panel + .policy-panel {
  margin-top: var(--space-4);
}

/* in slideshow mode absolute panels must all start at top: 0 with no margin offset */
html.js .policy-card + .policy-card,
html.js .policy-panel + .policy-panel {
  margin-top: 0;
}

/* JS-enhanced: single-panel slide show */
html.js .policy-stage {
  position: relative;
  overflow: hidden;
  margin-block: 0 var(--space-6);
  transition: height 350ms cubic-bezier(0.4, 0, 0.2, 1);
}

html.js .policy-panel {
  position: absolute;
  top: 0;
  left: 50%;
  width: min(700px, 90vw);
  transform: translateX(calc(-50% + 110vw));
  transition:
    transform 420ms cubic-bezier(0.4, 0, 0.2, 1),
    visibility 0s 420ms;
  visibility: hidden;
  pointer-events: none;
}

html.js .policy-panel.is-active {
  transform: translateX(-50%);
  visibility: visible;
  pointer-events: auto;
  transition:
    transform 420ms cubic-bezier(0.4, 0, 0.2, 1),
    visibility 0s 0s;
}

html.js .policy-panel.exiting {
  transform: translateX(calc(-50% - 110vw));
  visibility: visible;
  pointer-events: none;
  transition:
    transform 420ms cubic-bezier(0.4, 0, 0.2, 1),
    visibility 0s 420ms;
}

.anchor-nav a.is-active {
  border-color: var(--accent);
  color: var(--accent-strong);
  background: var(--accent-soft);
}

/* ---------------- reveal animations ---------------- */

html.js [data-reveal] {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 700ms ease, transform 700ms ease;
}

html.js [data-reveal].in {
  opacity: 1;
  transform: none;
}

/* ---------------- responsive ---------------- */

@media (min-width: 760px) {
  .hero-shell {
    grid-template-columns: minmax(0, 1.25fr) minmax(320px, 1fr);
    align-items: center;
  }

  .app-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .app-grid-featured {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .screenshot-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .two-column {
    grid-template-columns: minmax(0, 2fr) minmax(280px, 1fr);
  }

  .app-hero {
    grid-template-columns: auto minmax(0, 1fr);
    align-items: center;
  }

  .stat-row {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .feature-row {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  }

  .feature-row.flip .feature-media {
    order: -1;
  }
}

/* principles 2×2 — single column only on portrait phones */
@media (min-width: 520px) {
  .principles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-4);
  }

  .principle,
  .principle:last-child {
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--surface);
    padding: var(--space-4);
  }
}

@media (max-width: 759px) {
  /* no-JS mobile nav: keep it compact and wrapping */
  .site-nav {
    gap: 0.75rem;
    font-size: 0.92rem;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  /* push theme toggle + hamburger to the far right on mobile */
  .header-actions {
    margin-left: auto;
  }

  /* hamburger button */
  .nav-toggle {
    display: inline-flex;
  }

  /* JS-enhanced: collapse nav into a dropdown */
  html.js .site-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: color-mix(in srgb, var(--bg) 96%, transparent);
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    z-index: 1;
  }

  html.js .site-nav.is-open {
    display: flex;
  }

  html.js .site-nav a {
    padding: 0.9rem var(--space-4);
    border-bottom: 1px solid var(--border);
    font-size: 1rem;
    color: var(--text);
  }

  html.js .site-nav a:last-of-type {
    border-bottom: none;
  }
}

/* ---------------- reduced motion ---------------- */

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html.js [data-reveal] {
    opacity: 1;
    transform: none;
  }

  .marquee-track {
    animation: none;
  }
}