/* page.css — goupdate landing page styles. Uses DS tokens from colors_and_type.css */

/* ===== Page shell ===== */
html, body { margin: 0; padding: 0; }
body { background: var(--bg); color: var(--fg-2); min-height: 100vh; }
* { box-sizing: border-box; }

.page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.page > main {
  flex: 1;
  display: flex;
  flex-direction: column;
}

/* Density */
.page[data-density="compact"] { --pad-section: var(--space-6); --pad-hero: var(--space-7); }
.page[data-density="regular"] { --pad-section: var(--space-7); --pad-hero: var(--space-8); }
.page[data-density="comfy"]   { --pad-section: var(--space-8); --pad-hero: var(--space-9); }

/* Container — width controlled at section level. We use generous side gutters. */
.gh-container {
  width: 100%;
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 0 var(--space-5);
}

/* ===== Header ===== */
.gh-header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
  padding: 14px max(var(--space-5), calc((100vw - var(--content-width)) / 2));
  background: color-mix(in oklab, var(--bg) 80%, transparent);
  backdrop-filter: saturate(160%) blur(10px);
  -webkit-backdrop-filter: saturate(160%) blur(10px);
  border-bottom: 1px solid var(--border);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--fg-1);
}
.brand:hover { text-decoration: none; }
.brand-mark {
  width: 28px; height: 28px;
  background: var(--accent);
  color: var(--fg-on-accent);
  border-radius: 7px;
  display: inline-flex; align-items: center; justify-content: center;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  line-height: 1;
}
.brand-wm {
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--fg-1);
}
.brand-ver {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg-4);
  background: var(--surface-2);
  border: 1px solid var(--border);
  padding: 2px 6px;
  border-radius: 999px;
  margin-left: 2px;
}

.gh-nav {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}
.gh-nav > a:not(.btn) {
  font-size: 14px;
  font-weight: 500;
  color: var(--fg-2);
}
.gh-nav > a:not(.btn):hover { color: var(--fg-1); text-decoration: none; }
.gh-nav .nav-gh {
  display: inline-flex; align-items: center; gap: 6px;
}

.theme-toggle {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--fg-2);
  width: 32px; height: 32px;
  border-radius: 8px;
  display: inline-flex; align-items: center; justify-content: center;
  cursor: pointer;
  transition: all var(--dur-fast) var(--ease-out);
}
.theme-toggle:hover { background: var(--surface-hover); color: var(--fg-1); border-color: var(--border-strong); }
.theme-toggle:focus-visible { outline: none; box-shadow: var(--focus-ring); }

/* ===== Buttons ===== */
.btn {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 14px;
  border-radius: var(--radius-md);
  padding: 11px 18px;
  border: 1px solid transparent;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  line-height: 1;
  text-decoration: none;
  transition: all var(--dur-fast) var(--ease-out);
  white-space: nowrap;
}
.btn-sm { padding: 8px 14px; font-size: 13px; border-radius: 7px; }

.btn-primary { background: var(--accent); color: var(--fg-on-accent); }
.btn-primary:hover { background: var(--accent-hover); color: var(--fg-on-accent); text-decoration: none; box-shadow: var(--shadow-sm); transform: translateY(-1px); }
.btn-primary:active { background: var(--accent-press); transform: none; }

.btn-secondary {
  background: transparent;
  color: var(--fg-1);
  border-color: var(--border-strong);
}
.btn-secondary:hover { background: var(--surface-hover); color: var(--fg-1); text-decoration: none; }
.btn-secondary .btn-ar { opacity: 0.55; transition: transform var(--dur-fast) var(--ease-out); }
.btn-secondary:hover .btn-ar { transform: translateX(2px); opacity: 1; }

.btn:focus-visible { outline: none; box-shadow: var(--focus-ring); }

/* ===== Eyebrow / labels ===== */
.eyebrow {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--fg-4);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.eyebrow-dot {
  width: 6px; height: 6px;
  background: var(--accent);
  border-radius: 999px;
  box-shadow: 0 0 0 3px var(--accent-soft);
}

/* ===== Hero ===== */
.hero {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: var(--space-7);
  align-items: center;
  padding: var(--pad-hero, var(--space-8)) max(var(--space-5), calc((100vw - var(--content-width)) / 2));
  position: relative;
}
.hero::after {
  /* subtle dot grid bg behind hero */
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle at 1px 1px, var(--border-strong) 1px, transparent 0);
  background-size: 22px 22px;
  opacity: 0.35;
  mask-image: linear-gradient(to bottom, rgba(0,0,0,0.7), transparent 90%);
  -webkit-mask-image: linear-gradient(to bottom, rgba(0,0,0,0.7), transparent 90%);
  pointer-events: none;
  z-index: 0;
}
.hero > * { position: relative; z-index: 1; }

.hero-copy { display: flex; flex-direction: column; gap: var(--space-5); }

.hero-h1 {
  font-size: clamp(36px, 4.4vw, var(--text-4xl));
  font-weight: 700;
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--fg-1);
  margin: 0;
  text-wrap: balance;
}
.hero-accent {
  color: var(--accent);
  /* subtle underline accent under "Go" */
  background-image: linear-gradient(to bottom, transparent 68%, color-mix(in oklab, var(--accent) 22%, transparent) 68%, color-mix(in oklab, var(--accent) 22%, transparent) 92%, transparent 92%);
}

.hero-sub {
  font-size: var(--text-md);
  color: var(--fg-3);
  line-height: var(--leading-base);
  max-width: 52ch;
  text-wrap: pretty;
}
.hero-sub strong { color: var(--fg-1); font-weight: 600; }

.hero-ctas { display: flex; gap: var(--space-3); flex-wrap: wrap; align-items: center; margin-top: 4px; }

.hero-meta {
  list-style: none;
  padding: 0;
  margin: 8px 0 0;
  display: flex;
  gap: var(--space-5);
  flex-wrap: wrap;
  color: var(--fg-3);
  font-size: var(--text-sm);
}
.hero-meta li { display: inline-flex; align-items: center; gap: 6px; }
.hero-meta svg { color: var(--accent); }

/* CodeLine — inline command */
.code-line {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--code-fg);
  position: relative;
  max-width: max-content;
  min-width: 280px;
}
.code-line-lg {
  padding: 16px 18px;
  font-size: 16px;
  border-radius: var(--radius-lg);
  min-width: 360px;
  box-shadow: var(--shadow-sm);
}
.code-line .code-prompt {
  color: var(--code-prompt);
  user-select: none;
  font-weight: 600;
}
.code-line .code-text { flex: 1; }
.code-line .code-copy {
  appearance: none;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--fg-3);
  font-family: var(--font-sans);
  font-size: 11px;
  font-weight: 600;
  padding: 5px 9px;
  border-radius: 6px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-left: 16px;
  transition: all var(--dur-fast) var(--ease-out);
}
.code-line .code-copy:hover {
  color: var(--fg-1);
  border-color: var(--border-strong);
  background: var(--surface-hover);
}

/* code tokens */
.tok-num   { color: var(--code-number); font-weight: 600; }
.tok-cmd   { color: var(--code-keyword); }
.tok-flag  { color: var(--code-comment); }
.tok-url   { color: var(--code-string); }

/* ===== Hero terminal art ===== */
.hero-art {
  display: flex;
  justify-content: center;
  position: relative;
}
.term-card {
  width: 100%;
  max-width: 460px;
  background: #0A0D12;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 1px solid #232934;
  transform: rotate(0.4deg);
  position: relative;
}
.term-card::before {
  /* soft accent glow behind */
  content: "";
  position: absolute;
  inset: -40px;
  background: radial-gradient(closest-side, color-mix(in oklab, var(--accent) 30%, transparent), transparent 70%);
  z-index: -1;
  filter: blur(20px);
}
.term-titlebar {
  display: flex; align-items: center; gap: 8px;
  padding: 10px 14px;
  background: #161A22;
  border-bottom: 1px solid #232934;
}
.term-dot { width: 11px; height: 11px; border-radius: 999px; }
.term-dot.d-r { background: #E07474; }
.term-dot.d-y { background: #E0A852; }
.term-dot.d-g { background: #4DBE8A; }
.term-title { margin-left: 12px; font-family: var(--font-mono); font-size: 11px; color: #9BA3AF; }

.term-body {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.75;
  color: #E8E4DC;
  padding: 16px 18px;
  overflow-x: auto;
  scrollbar-width: thin;
  scrollbar-color: rgba(110, 118, 130, .4) transparent;
  transition: scrollbar-color var(--dur-base) var(--ease-out);
}
.term-body:hover { scrollbar-color: rgba(94, 234, 212, .6) transparent; }
.term-body::-webkit-scrollbar { height: 3px; transition: height var(--dur-base) var(--ease-out); }
.term-body:hover::-webkit-scrollbar { height: 8px; }
.term-body::-webkit-scrollbar-track { background: transparent; }
.term-body::-webkit-scrollbar-thumb { background: rgba(110, 118, 130, .35); border-radius: 999px; transition: background var(--dur-base) var(--ease-out); }
.term-body:hover::-webkit-scrollbar-thumb { background: rgba(94, 234, 212, .55); }
.term-body::-webkit-scrollbar-button { display: none; width: 0; height: 0; }
.term-body .line { white-space: nowrap; }
.term-body .prm { color: #6E7682; margin-right: 6px; }
.term-body .acc { color: #5EEAD4; }
.term-body .ok  { color: #4DBE8A; }
.term-body .dim { color: #6E7682; }
.term-body .bar { color: #5EEAD4; letter-spacing: -1px; }
.term-body .caret {
  display: inline-block;
  width: 7px; height: 13px;
  background: #5EEAD4;
  vertical-align: -2px;
  animation: term-blink 1s steps(1) infinite;
}
@keyframes term-blink { 50% { opacity: 0; } }

/* Override terminal accent based on current accent name -- it's hardcoded to teal for visual identity. */
[data-theme="dark"] .term-body .acc,
[data-theme="dark"] .term-body .bar,
[data-theme="dark"] .term-body .caret { /* already styled */ }

/* ===== Section scaffolding ===== */
.section {
  padding: var(--pad-section, var(--space-7)) max(var(--space-5), calc((100vw - var(--content-width)) / 2));
  border-top: 1px solid var(--border);
}
.section-tight {
  padding-top: var(--space-6);
  padding-bottom: var(--space-7);
}
.section-head {
  max-width: 720px;
  margin-bottom: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.section-head h2 {
  font-size: var(--text-3xl);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--fg-1);
  line-height: 1.1;
}
.section-lede {
  font-size: var(--text-md);
  color: var(--fg-3);
  line-height: var(--leading-base);
  max-width: 56ch;
}

/* ===== OS Tabs (install card) ===== */
.os-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}
.os-tabs {
  display: flex;
  gap: 2px;
  padding: 6px 8px 0;
  border-bottom: 1px solid var(--border);
  background: var(--surface-2);
}
.os-tab {
  appearance: none;
  background: transparent;
  border: 0;
  font-family: var(--font-sans);
  font-size: 13.5px;
  font-weight: 500;
  color: var(--fg-3);
  padding: 12px 16px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: color var(--dur-fast) var(--ease-out);
}
.os-tab:hover:not(.active) { color: var(--fg-1); }
.os-tab.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
  font-weight: 600;
  background: var(--surface);
  border-radius: 6px 6px 0 0;
}
.os-tab:focus-visible { outline: none; box-shadow: var(--focus-ring); border-radius: 6px; }

.os-body {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(220px, 1fr);
  gap: 0;
}
.os-snippets {
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  border-right: 1px solid var(--divider);
  min-width: 0;
}
.os-snippet-label {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg-4);
  margin-bottom: 8px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.os-snippet { min-width: 0; }
.os-snippet .code-line { width: 100%; min-width: 0; max-width: 100%; }
.os-snippet .code-line .code-text {
  flex: 1 1 auto;
  min-width: 0;
  overflow-x: hidden;
  white-space: nowrap;
  padding-bottom: 2px;
}
.os-snippet .code-line .code-copy { flex-shrink: 0; }

/* ---------- Themed slim scrollbars on code overflow ---------- */
.code-line .code-text,
.feat-cmd {
  scrollbar-width: thin;
  scrollbar-color: color-mix(in oklab, var(--surface-2) 100%, transparent) transparent;
  transition: scrollbar-color var(--dur-base) var(--ease-out);
}
.code-line .code-text:hover,
.feat-cmd:hover {
  overflow-x: auto;
  scrollbar-color: color-mix(in oklab, var(--accent), var(--fg-on-accent)) transparent;
}
.code-line .code-text::-webkit-scrollbar,
.feat-cmd::-webkit-scrollbar {
  height: 3px;
  width: 3px;
  transition: height var(--dur-base) var(--ease-out), width var(--dur-base) var(--ease-out);
}
.code-line .code-text:hover::-webkit-scrollbar,
.feat-cmd:hover::-webkit-scrollbar {
  height: 8px;
  width: 8px;
}
.code-line .code-text::-webkit-scrollbar-track,
.feat-cmd::-webkit-scrollbar-track {
  background: transparent;
  margin: 0 4px;
}
.code-line .code-text::-webkit-scrollbar-thumb,
.feat-cmd::-webkit-scrollbar-thumb {
  background: color-mix(in oklab, var(--fg-4) 45%, transparent);
  border-radius: 999px;
  transition: background var(--dur-base) var(--ease-out);
}
.code-line .code-text:hover::-webkit-scrollbar-thumb,
.feat-cmd:hover::-webkit-scrollbar-thumb {
  background: color-mix(in oklab, var(--accent) 70%, var(--fg-4));
}
.code-line .code-text::-webkit-scrollbar-button,
.feat-cmd::-webkit-scrollbar-button {
  display: none;
  width: 0;
  height: 0;
}
.code-line .code-text::-webkit-scrollbar-corner,
.feat-cmd::-webkit-scrollbar-corner { background: transparent; }

.os-notes {
  padding: var(--space-5);
  background: var(--surface-2);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.os-notes-label {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg-4);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 4px;
}
.os-notes ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 12px; }
.os-notes li {
  font-size: 14px;
  color: var(--fg-2);
  line-height: 1.55;
  display: grid;
  grid-template-columns: 14px 1fr;
  gap: 10px;
  align-items: start;
}
.os-notes .bul-dot {
  width: 6px; height: 6px;
  background: var(--accent);
  border-radius: 2px;
  margin-top: 9px;
  margin-left: 2px;
}
.os-notes code, .os-snippets code, .callout code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  padding: 1px 5px;
  border-radius: 3px;
  background: color-mix(in oklab, var(--fg-1) 6%, transparent);
  border: 0;
  color: var(--fg-1);
}

/* ===== Features grid ===== */
.feat-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--space-4);
}
.feat {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: transform var(--dur-base) var(--ease-out), border-color var(--dur-base) var(--ease-out), box-shadow var(--dur-base) var(--ease-out);
  position: relative;
  overflow: hidden;
}
.feat:hover {
  border-color: var(--border-strong);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.feat-ico {
  width: 36px; height: 36px;
  border-radius: 9px;
  background: var(--accent-soft);
  color: var(--accent);
  display: inline-flex; align-items: center; justify-content: center;
}
.feat-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--fg-1);
}
.feat-desc {
  font-size: 13.5px;
  color: var(--fg-3);
  line-height: 1.5;
  flex: 1;
}
.feat-cmd {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--fg-1);
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  border-radius: 6px;
  padding: 7px 10px;
  margin-top: 4px;
  white-space: nowrap;
  overflow-x: hidden;
}
.feat-cmd-prm {
  color: var(--code-prompt);
  user-select: none;
  margin-right: 6px;
}

/* ===== Callouts ===== */
.callouts {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}
.callout {
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 14px;
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius-lg);
  border: 1px solid;
  align-items: start;
}
.callout-ico {
  width: 26px; height: 26px;
  border-radius: 999px;
  display: inline-flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 13px;
  color: #fff;
  flex-shrink: 0;
  margin-top: 1px;
}
.callout-ttl { font-weight: 600; color: var(--fg-1); margin-bottom: 4px; font-size: 15px; }
.callout-txt { color: var(--fg-2); font-size: 14px; line-height: 1.6; }

.c-warn {
  background: color-mix(in oklab, var(--warning-500) 8%, var(--surface));
  border-color: color-mix(in oklab, var(--warning-500) 28%, transparent);
}
.c-warn .callout-ico { background: var(--warning-500); }

.c-info {
  background: color-mix(in oklab, var(--info-500) 8%, var(--surface));
  border-color: color-mix(in oklab, var(--info-500) 28%, transparent);
}
.c-info .callout-ico { background: var(--info-500); }

/* ===== Footer ===== */
.gh-footer {
  border-top: 1px solid var(--border);
  padding: var(--space-6) max(var(--space-5), calc((100vw - var(--content-width)) / 2)) var(--space-5);
  margin-top: auto;
  background: var(--surface-2);
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}
.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.footer-brand .brand-mark { width: 24px; height: 24px; font-size: 12px; }
.footer-brand .brand-wm { font-size: 15px; }
.footer-tag {
  font-size: 13.5px;
  color: var(--fg-3);
  margin-left: 4px;
}
.footer-nav {
  display: flex;
  gap: var(--space-5);
  flex-wrap: wrap;
}
.footer-nav a {
  font-size: 13.5px;
  color: var(--fg-2);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 500;
}
.footer-nav a:hover { color: var(--fg-1); text-decoration: none; }
.footer-fine {
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--divider);
  font-size: 12.5px;
  color: var(--fg-4);
}

/* ===== Responsive ===== */
@media (max-width: 1080px) {
  .feat-grid { grid-template-columns: repeat(3, 1fr); }
  .feat:nth-child(4), .feat:nth-child(5) { grid-column: span 1; }
}
@media (max-width: 1024px) {
  .os-body { grid-template-columns: 1fr; }
  .os-snippets { border-right: 0; border-bottom: 1px solid var(--divider); }
}
@media (max-width: 880px) {
  .gh-header { padding-left: var(--space-4); padding-right: var(--space-4); }
  .gh-nav { gap: var(--space-3); }
  .gh-nav > a:not(.nav-gh) { display: none; }
  .hero {
    grid-template-columns: 1fr;
    gap: var(--space-6);
    padding: var(--space-7) var(--space-4);
  }
  .hero-art { order: -1; max-width: 460px; }
  .section { padding-left: var(--space-4); padding-right: var(--space-4); }
  .feat-grid { grid-template-columns: repeat(2, 1fr); }
  .callouts { grid-template-columns: 1fr; }
  .gh-footer { padding-left: var(--space-4); padding-right: var(--space-4); }
  .footer-inner { flex-direction: column; align-items: flex-start; }
}
@media (max-width: 560px) {
  .feat-grid { grid-template-columns: 1fr; }
  .hero-h1 { font-size: 32px; }
  .section-head h2 { font-size: 26px; }
  .brand-ver { display: none; }
  .code-line-lg { min-width: 0; width: 100%; }
}