/* gh-hound.pages.dev
   Bramble: the landing page wears the TUI's own theme.
   Every color below is lifted from internal/theme/theme.go. */

:root {
  --bg:        #0E0F0C;
  --bg-elev:   #141512;
  --surface:   #1B1D17;
  --surface2:  #24271E;
  --line:      #2E3227;
  --line2:     #3D4233;
  --dim:       #6B7060;
  --subtle:    #8C9179;
  --muted:     #AEB39B;
  --fg-soft:   #CFCDBB;
  --fg:        #EAE8D9;
  --ok:        #4FD37A;
  --ok-deep:   #2E8E55;
  --fail:      #E2564B;
  --run:       #E0A33E;
  --info:      #6E9CB5;

  --font-display: "Bricolage Grotesque", "Avenir Next", "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", "SF Mono", ui-monospace, monospace;

  /* radius scale: 12 frames / 8 buttons / 6 chips */
  --r-frame: 12px;
  --r-btn: 8px;
  --r-chip: 6px;

  --container: 1160px;
  --pad: clamp(1.25rem, 4vw, 2.5rem);
}

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

html {
  scroll-behavior: smooth;
  /* iOS Safari font-boosts overflowing blocks (.method-cmd pills)
     by per-block factors, making the four install commands render
     at visibly different sizes. */
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-display);
  font-optical-sizing: auto;
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

::selection { background: rgba(79, 211, 122, 0.25); color: var(--fg); }

a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }

.wrap {
  max-width: var(--container);
  margin: 0 auto;
  padding-left: var(--pad);
  padding-right: var(--pad);
}

/* ---------- atmosphere ---------- */

.atmosphere {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(1100px 480px at 18% -8%, rgba(79, 211, 122, 0.055), transparent 64%),
    radial-gradient(900px 600px at 100% 16%, rgba(110, 156, 181, 0.035), transparent 60%),
    var(--bg);
}
.atmosphere::after {
  /* film grain: static, cheap, fixed layer */
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.30;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix type='matrix' values='0 0 0 0 0.92 0 0 0 0 0.91 0 0 0 0 0.85 0 0 0 0.05 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ---------- type ---------- */

h1, h2, h3 {
  font-weight: 600;
  letter-spacing: -0.025em;
  line-height: 1.08;
  text-wrap: balance;
}

.mono { font-family: var(--font-mono); }

/* an inline shell command, worn like a tiny prompt */
.sh {
  font-family: var(--font-mono);
  font-size: 0.84em;
  color: var(--fg-soft);
  background: var(--surface);
  border: 1px solid var(--line2);
  border-radius: var(--r-chip);
  padding: 0.1em 0.5em 0.16em;
  white-space: nowrap;
}
.sh .ps1 { color: var(--ok); margin-right: 0.3em; user-select: none; }

/* the product name, worn as a chip wherever prose says it */
.hound {
  font-family: var(--font-mono);
  font-size: 0.84em;
  font-weight: 500;
  color: var(--ok);
  background: color-mix(in srgb, var(--ok) 12%, transparent);
  border: 1px solid color-mix(in srgb, var(--ok) 26%, transparent);
  border-radius: var(--r-chip);
  padding: 0.05em 0.42em 0.12em;
  white-space: nowrap;
}

/* ---------- nav ---------- */

.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 66px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 1.02rem;
}
.brand img { width: 34px; height: 34px; border-radius: 50%; }
.brand .tld { color: var(--dim); font-weight: 400; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.9rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
}
.nav-links a {
  color: var(--muted);
  transition: color 0.18s ease;
}
.nav-links a:hover { color: var(--fg); }
.nav-links a.gh {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  color: var(--fg-soft);
  border: 1px solid var(--line2);
  border-radius: var(--r-btn);
  padding: 0.42rem 0.85rem;
  transition: border-color 0.18s ease, color 0.18s ease, background 0.18s ease;
}
.nav-links a.gh:hover {
  border-color: var(--ok-deep);
  color: var(--fg);
  background: var(--surface);
}
.nav-links a.gh svg { width: 16px; height: 16px; fill: currentColor; }

@media (max-width: 760px) {
  .nav-links a:not(.gh) { display: none; }
}

/* ---------- hero ---------- */

/* padding-top only: the shorthand would zero out .wrap's side padding
   (same specificity, .hero wins by order). */
.hero { padding-top: clamp(3.5rem, 9vh, 5.5rem); }

.hero h1 {
  font-size: clamp(2.35rem, 5.6vw, 4.1rem);
  font-weight: 650;
  max-width: 17ch;
}
.hero h1 .accent { color: var(--ok); }

.hero .sub {
  margin-top: 1.4rem;
  max-width: 52ch;
  font-size: clamp(1.02rem, 1.6vw, 1.18rem);
  color: var(--muted);
}
.hero .sub .mono { color: var(--fg-soft); font-size: 0.92em; }

.cta-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.9rem;
  margin-top: 2.1rem;
}

.install-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  font-family: var(--font-mono);
  font-size: 0.92rem;
  background: var(--surface);
  border: 1px solid var(--line2);
  border-radius: var(--r-btn);
  padding: 0.72rem 0.6rem 0.72rem 1.05rem;
  color: var(--fg-soft);
  box-shadow: 0 8px 28px rgba(8, 10, 7, 0.45);
}
.install-pill .ps1 { color: var(--ok); user-select: none; }

.copy-btn {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--bg);
  background: var(--ok);
  border: none;
  border-radius: var(--r-chip);
  padding: 0.42rem 0.75rem;
  cursor: pointer;
  font-weight: 600;
  transition: background 0.15s ease, transform 0.1s ease;
}
.copy-btn:hover { background: #63DE8C; }
.copy-btn:active { transform: scale(0.96); }
.copy-btn.copied { background: var(--fg); }

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: var(--r-btn);
  padding: 0.78rem 1.15rem;
  transition: color 0.18s ease, border-color 0.18s ease;
}
.btn-ghost:hover { color: var(--fg); border-color: var(--line2); }

/* terminal frame */

.term {
  border: 1px solid var(--line2);
  border-radius: var(--r-frame);
  overflow: hidden;
  background: #0B0C0A;
  box-shadow:
    0 1px 0 rgba(234, 232, 217, 0.04) inset,
    0 24px 70px -18px rgba(5, 7, 4, 0.85),
    0 6px 22px rgba(8, 10, 7, 0.5);
}
.term img { width: 100%; }

.hero-term {
  margin-top: clamp(2.6rem, 6vh, 4rem);
  position: relative;
}
.hero-term .term { position: relative; z-index: 1; }
.hero-term::before {
  /* soft pool of light under the terminal */
  content: "";
  position: absolute;
  inset: 10% -6% -18% -6%;
  background: radial-gradient(58% 70% at 50% 42%, rgba(79, 211, 122, 0.07), transparent 70%);
  pointer-events: none;
}
.hero-term figcaption,
.shot-caption {
  margin-top: 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--dim);
  text-align: right;
}

/* ---------- sections ---------- */

section { padding: clamp(4.5rem, 11vh, 7.5rem) 0 0; }

.section-head h2 {
  font-size: clamp(1.7rem, 3.4vw, 2.5rem);
  max-width: 24ch;
}
.section-head .lede {
  margin-top: 0.9rem;
  color: var(--muted);
  max-width: 56ch;
}

/* ---------- trail (why) ---------- */

.trail { margin-top: 2.8rem; border-top: 1px solid var(--line); }

.trail-row {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) auto minmax(0, 1fr);
  align-items: center;
  gap: 1.4rem;
  padding: 1.45rem 0.25rem;
}
.trail-row + .trail-row { border-top: 1px solid var(--line); }

.trail-q {
  font-size: clamp(1.08rem, 2vw, 1.35rem);
  font-weight: 550;
  color: var(--fg);
}
.trail-a {
  font-family: var(--font-mono);
  font-size: 0.88rem;
  color: var(--subtle);
  text-align: left;
}
.trail-a b { color: var(--fg-soft); font-weight: 500; }

.keys { display: flex; gap: 0.4rem; justify-content: center; }
.key {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--ok);
  background: var(--surface);
  border: 1px solid var(--line2);
  border-bottom-width: 3px;
  border-radius: var(--r-chip);
  padding: 0.28rem 0.6rem;
  min-width: 2.1rem;
  text-align: center;
  white-space: nowrap;
}

@media (max-width: 860px) {
  .trail-row {
    grid-template-columns: 1fr;
    gap: 0.7rem;
    padding: 1.3rem 0;
  }
  .keys { justify-content: flex-start; }
  .trail-a { text-align: left; }
}

/* ---------- screens gallery ---------- */

.tabs {
  margin-top: 2.4rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}
.tab {
  font-family: var(--font-mono);
  font-size: 0.84rem;
  color: var(--subtle);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: var(--r-chip);
  padding: 0.45rem 0.85rem;
  cursor: pointer;
  transition: color 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}
.tab:hover { color: var(--fg-soft); border-color: var(--line2); }
.tab[aria-selected="true"] {
  color: var(--bg);
  background: var(--ok);
  border-color: var(--ok);
  font-weight: 600;
}

.shot-stage { margin-top: 1.4rem; }
.shot {
  display: none;
  animation: shot-in 0.45s cubic-bezier(0.16, 1, 0.3, 1);
}
.shot.active { display: block; }
@keyframes shot-in {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: none; }
}
@media (prefers-reduced-motion: reduce) {
  .shot { animation: none; }
}

/* ---------- engineering notes ---------- */

.eng-grid {
  margin-top: 2.6rem;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 2.6rem 3rem;
}
.eng h3 {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--ok);
  margin-bottom: 0.55rem;
}
.eng p { font-size: 0.95rem; color: var(--muted); }
.eng p code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  color: var(--fg-soft);
}

@media (max-width: 980px) { .eng-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 620px) { .eng-grid { grid-template-columns: 1fr; gap: 1.9rem; } }

/* ---------- agent surface ---------- */

.agents-split {
  margin-top: 2.6rem;
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: 2.6rem;
  align-items: start;
}
@media (max-width: 920px) { .agents-split { grid-template-columns: 1fr; } }

.exit-table {
  margin-top: 1.8rem;
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-mono);
  font-size: 0.88rem;
}
.exit-table caption {
  text-align: left;
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--dim);
  padding-bottom: 0.7rem;
}
.exit-table td {
  padding: 0.62rem 0.9rem 0.62rem 0;
  color: var(--muted);
  border-top: 1px solid var(--line);
}
.exit-table td.code { width: 3.2rem; font-weight: 700; }
.exit-table tr:nth-child(1) td.code { color: var(--ok); }
.exit-table tr:nth-child(2) td.code { color: var(--fail); }
.exit-table tr:nth-child(3) td.code { color: var(--info); }
.exit-table tr:nth-child(4) td.code { color: var(--run); }

.codeblock {
  background: #0B0C0A;
  border: 1px solid var(--line2);
  border-radius: var(--r-frame);
  overflow: hidden;
  box-shadow: 0 18px 50px -16px rgba(5, 7, 4, 0.8);
}
.codeblock-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.7rem 1rem;
  border-bottom: 1px solid var(--line);
  background: var(--bg-elev);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--subtle);
  overflow-x: auto;
}
.codeblock-bar .cmd { white-space: nowrap; }
.codeblock-bar .ps1 { color: var(--ok); }
.codeblock pre {
  padding: 1.05rem 1.2rem 1.2rem;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  line-height: 1.55;
  color: var(--fg-soft);
}
.codeblock .j-key { color: var(--info); }
.codeblock .j-str { color: var(--muted); }
.codeblock .j-num { color: var(--run); }
.codeblock .j-red { color: var(--fail); }
.codeblock .j-dim { color: var(--dim); }

/* ---------- install ---------- */

.install-grid {
  margin-top: 2.6rem;
  display: grid;
  gap: 1rem;
}
.method {
  display: grid;
  grid-template-columns: 200px minmax(0, 1fr);
  gap: 1.4rem;
  align-items: center;
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--r-frame);
  padding: 1.15rem 1.3rem;
  transition: border-color 0.18s ease;
}
.method:hover { border-color: var(--line2); }
.method.primary { border-color: var(--ok-deep); background: var(--surface); }
.method h3 { font-size: 1.02rem; font-weight: 600; }
.method .note {
  margin-top: 0.25rem;
  font-size: 0.82rem;
  color: var(--dim);
}
.method-cmd {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.86rem;
  color: var(--fg-soft);
  background: #0B0C0A;
  border: 1px solid var(--line);
  border-radius: var(--r-btn);
  padding: 0.65rem 0.55rem 0.65rem 0.95rem;
  overflow-x: auto;
}
.method-cmd .ps1 { color: var(--ok); user-select: none; }
.method-cmd code { white-space: nowrap; }

@media (max-width: 760px) {
  .method { grid-template-columns: 1fr; gap: 0.8rem; }
}

.version-chip[hidden] { display: none; }
.version-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  margin-top: 1.1rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--subtle);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.35rem 0.9rem;
}
.version-chip a { color: var(--ok); }
.version-chip a:hover { text-decoration: underline; }

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

footer {
  margin-top: clamp(5rem, 12vh, 8rem);
  border-top: 1px solid var(--line);
  padding: 3.2rem 0 3.6rem;
}
.foot-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr) minmax(0, 1fr);
  gap: 2.5rem;
}
.foot-brand p {
  margin-top: 0.9rem;
  font-size: 0.9rem;
  color: var(--dim);
  max-width: 34ch;
}
.foot-col h4 {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--dim);
  margin-bottom: 1rem;
}
.foot-col a {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.87rem;
  color: var(--muted);
  padding: 0.28rem 0;
  transition: color 0.15s ease;
}
.foot-col a:hover { color: var(--fg); }
.foot-meta {
  margin-top: 2.8rem;
  padding-top: 1.6rem;
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.8rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--dim);
}
.foot-meta a { color: var(--subtle); }
.foot-meta a:hover { color: var(--fg); }

.foot-made {
  margin-top: 2rem;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--dim);
}
.foot-made .heart {
  width: 0.9em;
  height: 0.9em;
  fill: var(--ok);
  vertical-align: -0.08em;
}
.foot-made a { color: var(--subtle); }
.foot-made a:hover { color: var(--fg); }

@media (max-width: 760px) {
  .foot-grid { grid-template-columns: 1fr; gap: 2rem; }
  /* side-by-side meta wraps into a ragged left-aligned stack on
     narrow screens; center it to match .foot-made below. */
  .foot-meta {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 0.55rem;
  }
}

/* ---------- reveal on scroll ---------- */

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal.in { opacity: 1; transform: none; }

/* hero load-in cascade */
.rise {
  opacity: 0;
  transform: translateY(18px);
  animation: rise 0.85s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}
.rise.d1 { animation-delay: 0.06s; }
.rise.d2 { animation-delay: 0.16s; }
.rise.d3 { animation-delay: 0.26s; }
.rise.d4 { animation-delay: 0.42s; }
@keyframes rise { to { opacity: 1; transform: none; } }

@media (prefers-reduced-motion: reduce) {
  .reveal, .rise { opacity: 1; transform: none; animation: none; transition: none; }
}

/* skip link */
.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--ok);
  color: var(--bg);
  padding: 0.6rem 1rem;
  font-family: var(--font-mono);
  z-index: 100;
}
.skip:focus { left: 0.6rem; top: 0.6rem; }

:focus-visible {
  outline: 2px solid var(--ok);
  outline-offset: 2px;
  border-radius: 2px;
}

/* ---------- agent verb tabs ---------- */

.agent-tabs { margin: 0 0 0.9rem; }
.agent-pane pre { min-height: 26rem; }
@media (max-width: 920px) { .agent-pane pre { min-height: 0; } }