/* ==========================================================================
   Hublot: showcase site, "brass porthole" aesthetic
   A round viewport into a shared browser: brass ring, riveted glass, deep
   sea navy behind it. Refined rather than maximalist: one strong circular
   motif (the porthole itself), reused at every scale instead of scattered
   ornament.
   ========================================================================== */

:root {
  /* Palette: night sea + engraved brass + a teal glass-glow. Warm off-white
     text (parchment, not clinical white) to keep the "old ship's log" mood. */
  --navy: #0a141c;
  --navy-panel: #0f1e29;
  --navy-deep: #061019;
  --hull: #142735;

  --brass: #caa03f;
  --brass-light: #f1cf7d;
  --brass-dark: #8a651f;
  --teal: #3fb7ad;
  --teal-deep: #0f6a67;
  --copper: #c1663b;
  --alert: #e2604a;

  --text: #f3ecd8;
  --text-dim: #c3b89a;
  /* Lightened from an earlier #7c7259: that shade sat at ~3.6-3.9:1 against
     the navy backgrounds it's used on (eyebrow, footer, footnotes), under
     the 4.5:1 AA floor for normal text. This tone clears 4.5:1 against all
     three navy shades (--navy, --navy-panel, --navy-deep). */
  --text-faint: #8f8468;

  --font-display: "Fraunces", "Iowan Old Style", "Palatino Linotype", serif;
  --font-body: "IBM Plex Sans", "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", "Cascadia Code", monospace;

  --radius-lg: 28px;
  --radius-md: 18px;
  --radius-sm: 10px;
  --gap: clamp(1rem, 2vw, 1.75rem);
  --content-w: 1180px;
}

/* -------------------------------------------------------------------------
   Reset & base
   ------------------------------------------------------------------------- */

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

html {
  color-scheme: dark;
  scroll-behavior: smooth;
}

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

body {
  margin: 0;
  background: var(--navy);
  background-image:
    radial-gradient(ellipse 900px 500px at 15% -10%, rgba(63, 183, 173, 0.08), transparent 60%),
    radial-gradient(ellipse 700px 500px at 100% 20%, rgba(202, 160, 63, 0.07), transparent 60%);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

h1,
h2,
h3 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.1;
  margin: 0;
}

code,
pre {
  font-family: var(--font-mono);
}

code {
  background: rgba(255, 255, 255, 0.08);
  padding: 0.12em 0.4em;
  border-radius: 4px;
  font-size: 0.92em;
  color: var(--brass-light);
}

pre {
  margin: 0;
  padding: 0.9rem 1.15rem;
  background: var(--navy-deep);
  border-radius: var(--radius-sm);
  overflow-x: auto;
  border-left: 4px solid var(--teal);
  white-space: pre-wrap;
  word-break: break-word;
  min-width: 0;
}

pre code {
  background: none;
  padding: 0;
  color: #cdeee9;
}

a {
  color: var(--teal);
}

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

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--brass-light);
  color: #241a08;
  font-family: var(--font-display);
  font-weight: 700;
  padding: 0.75rem 1.5rem;
  z-index: 999;
  border-radius: 0 0 var(--radius-sm) 0;
}

.skip-link:focus {
  left: 0;
}

.accent-brass {
  color: var(--brass-light);
}
.accent-teal {
  color: var(--teal);
}
.accent-faint {
  color: var(--text-faint);
}

/* -------------------------------------------------------------------------
   Top bar: a riveted brass plaque, not a sidebar
   ------------------------------------------------------------------------- */

.topbar {
  position: sticky;
  top: 0;
  z-index: 40;
  background: linear-gradient(180deg, var(--navy-panel), var(--navy));
  border-bottom: 2px solid rgba(202, 160, 63, 0.25);
  backdrop-filter: blur(6px);
}

.topbar-inner {
  max-width: var(--content-w);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 1.4rem;
  padding: 0.7rem 1.4rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  text-decoration: none;
  color: var(--text);
}

.brand-mark {
  width: 34px;
  height: 34px;
  filter: drop-shadow(0 0 6px rgba(202, 160, 63, 0.45));
}

.brand-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.35rem;
  letter-spacing: 0.01em;
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  position: relative;
  margin-left: auto;
  width: 40px;
  height: 34px;
  padding: 0;
  border: 1px solid rgba(202, 160, 63, 0.4);
  border-radius: var(--radius-sm);
  background: transparent;
  cursor: pointer;
}

/* Closed state reads as a little swell of waves rather than a generic
   three-bar burger, open state fades to a plain close cross. */
.nav-toggle-icon {
  position: absolute;
  inset: 0;
  margin: auto;
  fill: none;
  stroke: var(--brass-light);
  stroke-width: 2;
  stroke-linecap: round;
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.nav-toggle-icon--close {
  opacity: 0;
  transform: scale(0.8);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-icon--waves {
  opacity: 0;
  transform: scale(0.8);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-icon--close {
  opacity: 1;
  transform: scale(1);
}

@media (prefers-reduced-motion: reduce) {
  .nav-toggle-icon {
    transition: opacity 0.01ms;
  }
}

.topnav {
  display: flex;
  align-items: center;
  gap: 1.6rem;
  margin-left: auto;
  font-family: var(--font-body);
  font-weight: 500;
}

.topnav a {
  color: var(--text-dim);
  text-decoration: none;
  padding: 0.3rem 0.1rem;
  border-bottom: 2px solid transparent;
  transition: color 0.15s ease, border-color 0.15s ease;
}

.topnav a:hover,
.topnav a:focus-visible {
  color: var(--brass-light);
  border-bottom-color: var(--brass);
}

.topnav-repo {
  color: var(--text) !important;
  background: rgba(202, 160, 63, 0.14);
  border: 1px solid rgba(202, 160, 63, 0.4);
  border-radius: 999px;
  padding: 0.35rem 0.9rem !important;
}

.topnav-repo:hover,
.topnav-repo:focus-visible {
  border-color: var(--brass-light);
}

/* -------------------------------------------------------------------------
   Layout shell
   ------------------------------------------------------------------------- */

main {
  max-width: var(--content-w);
  margin: 0 auto;
  padding: 0 1.4rem 3rem;
}

/* -------------------------------------------------------------------------
   Hero
   ------------------------------------------------------------------------- */

.hero {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 2.6rem;
  align-items: center;
  padding: 3.2rem 0 2.6rem;
  scroll-margin-top: 5rem;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin: 0 0 0.9rem;
}

.hero h1 {
  font-size: clamp(2.3rem, 4.6vw, 3.5rem);
  margin-bottom: 1.15rem;
}

.lede {
  color: var(--text-dim);
  font-size: 1.1rem;
  max-width: 48ch;
  margin: 0 0 1.9rem;
}

.cta-row {
  display: flex;
  gap: 0.9rem;
  flex-wrap: wrap;
}

.btn {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.02rem;
  text-decoration: none;
  padding: 0.7rem 1.6rem;
  border-radius: 999px;
  display: inline-block;
  transition: filter 0.15s ease, transform 0.15s ease;
}

.btn:hover,
.btn:focus-visible {
  filter: brightness(1.12);
  transform: translateY(-1px);
}

.btn--primary {
  background: linear-gradient(180deg, var(--brass-light), var(--brass));
  color: #241a08;
}

.btn--ghost {
  background: transparent;
  color: var(--text);
  border: 2px solid var(--teal);
}

.btn--large {
  font-size: 1.15rem;
  padding: 0.9rem 2rem;
}

/* -------------------------------------------------------------------------
   The porthole itself
   ------------------------------------------------------------------------- */

.hero-porthole {
  display: flex;
  justify-content: center;
}

.porthole-frame {
  position: relative;
  width: min(420px, 100%);
  aspect-ratio: 1;
  border-radius: 50%;
  background: linear-gradient(155deg, var(--brass-light) 0%, var(--brass) 45%, var(--brass-dark) 100%);
  box-shadow:
    0 0 0 6px rgba(0, 0, 0, 0.35) inset,
    0 22px 60px rgba(0, 0, 0, 0.55);
  padding: 16px;
}

@media (prefers-reduced-motion: no-preference) {
  .porthole-frame {
    animation: bob 7s ease-in-out infinite;
  }
}

@keyframes bob {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-8px);
  }
}

.porthole-rivets {
  position: absolute;
  inset: 0;
}

.porthole-rivets span {
  position: absolute;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, #f4dda0, #5f430f 70%);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
  transform: translate(-50%, -50%);
}

/* Centered on the ring's mid-band radius (frame radius minus half the 16px
   padding), placed every 45 degrees from the top via sin/cos, same method
   used for assets/hublot-mark.svg so the two stay in sync. */
.porthole-rivets span:nth-child(1) {
  top: 1.90%;
  left: 50%;
}
.porthole-rivets span:nth-child(2) {
  top: 15.98%;
  left: 84.02%;
}
.porthole-rivets span:nth-child(3) {
  top: 50%;
  left: 98.10%;
}
.porthole-rivets span:nth-child(4) {
  top: 84.02%;
  left: 84.02%;
}
.porthole-rivets span:nth-child(5) {
  top: 98.10%;
  left: 50%;
}
.porthole-rivets span:nth-child(6) {
  top: 84.02%;
  left: 15.98%;
}
.porthole-rivets span:nth-child(7) {
  top: 50%;
  left: 1.90%;
}
.porthole-rivets span:nth-child(8) {
  top: 15.98%;
  left: 15.98%;
}

.porthole-glass {
  position: relative;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: radial-gradient(circle at 38% 30%, #123c3d, #061f21 62%, #030f10 100%);
  box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.55) inset, 0 0 40px rgba(63, 183, 173, 0.18) inset;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.porthole-glint {
  position: absolute;
  top: -20%;
  left: -30%;
  width: 70%;
  height: 160%;
  background: linear-gradient(115deg, rgba(255, 255, 255, 0.16), transparent 55%);
  transform: rotate(8deg);
  pointer-events: none;
}

.porthole-tabs {
  display: flex;
  gap: 0.35rem;
  padding: 0.85rem 0.9rem 0.4rem;
  flex-wrap: wrap;
}

.porthole-tab {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  color: var(--text-faint);
  background: rgba(255, 255, 255, 0.06);
  padding: 0.22rem 0.55rem;
  border-radius: 999px;
}

.porthole-tab--active {
  color: #06201f;
  background: var(--teal);
}

.porthole-readout {
  flex: 1;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: #c9f3ea;
  padding: 0.5rem 1rem 1.1rem;
  white-space: pre-wrap;
  overflow: hidden;
}

.porthole-readout .caret {
  display: inline-block;
  width: 0.5em;
  height: 0.95em;
  background: var(--brass-light);
  vertical-align: text-bottom;
}

@media (prefers-reduced-motion: no-preference) {
  .porthole-readout .caret {
    animation: blink 1s steps(1) infinite;
  }
}

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

/* -------------------------------------------------------------------------
   Panels (section shells)
   ------------------------------------------------------------------------- */

.panel {
  background: var(--navy-panel);
  border: 1px solid rgba(202, 160, 63, 0.16);
  border-radius: var(--radius-lg);
  margin-bottom: var(--gap);
  overflow: hidden;
  scroll-margin-top: 5.5rem;
}

.panel-head {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  padding: 1.15rem 1.7rem;
  background: linear-gradient(90deg, rgba(202, 160, 63, 0.14), transparent);
  border-bottom: 1px solid rgba(202, 160, 63, 0.16);
}

.panel-mark {
  color: var(--brass);
  font-size: 1.3rem;
  line-height: 1;
}

.panel-head h2 {
  font-size: clamp(1.4rem, 2.4vw, 1.9rem);
  color: var(--text);
}

.panel-body {
  padding: 1.7rem 1.9rem 2.1rem;
}

.lede-small {
  color: var(--text-dim);
  max-width: 66ch;
  margin: 0 0 1.4rem;
}

.two-col {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 2rem;
  align-items: center;
}

.plate-list {
  margin: 1rem 0 1.2rem;
  padding-left: 1.3rem;
  color: var(--text-dim);
}

.plate-list li {
  margin-bottom: 0.7rem;
}

.plate-list strong {
  color: var(--text);
}

/* -------------------------------------------------------------------------
   Alert readout (problem section)
   ------------------------------------------------------------------------- */

.readout {
  background: var(--navy-deep);
  border-radius: var(--radius-sm);
  padding: 1.1rem 1.3rem;
  font-family: var(--font-mono);
  font-size: 0.86rem;
  border-left: 4px solid var(--alert);
}

.readout-line {
  margin: 0 0 0.4rem;
  word-break: break-word;
}

.readout-prompt {
  color: var(--text-faint);
  margin-right: 0.5rem;
}

.readout-line--fault {
  color: var(--alert);
}

/* -------------------------------------------------------------------------
   Porthole grid (architecture cards)
   ------------------------------------------------------------------------- */

.porthole-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.2rem;
  margin: 0.4rem 0 1.6rem;
}

.porthole-card {
  background: var(--hull);
  border: 1px solid rgba(202, 160, 63, 0.14);
  border-radius: var(--radius-md);
  padding: 1.4rem 1.4rem 1.3rem;
}

.porthole-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.1rem;
  height: 2.1rem;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, var(--brass-light), var(--brass-dark) 75%);
  color: #241a08;
  font-size: 1rem;
  margin-bottom: 0.8rem;
}

.porthole-card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.porthole-card p {
  margin: 0;
  color: var(--text-dim);
  font-size: 0.95rem;
}

.axiom {
  font-family: var(--font-mono);
  font-size: 0.92rem;
  color: var(--text);
  background: linear-gradient(90deg, rgba(63, 183, 173, 0.14), transparent);
  border-left: 4px solid var(--teal);
  padding: 0.9rem 1.2rem;
  margin: 0;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.axiom-tag {
  color: var(--teal);
  font-weight: 700;
  margin-right: 0.6rem;
}

/* -------------------------------------------------------------------------
   Transmission log (commands)
   ------------------------------------------------------------------------- */

.transmission-log {
  list-style: none;
  margin: 0 0 1.6rem;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.transmission-log li {
  display: grid;
  grid-template-columns: 46px 1fr;
  gap: 1rem;
  align-items: start;
}

.tx-body {
  min-width: 0;
}

.tx-id {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: #06201f;
  background: var(--teal);
  padding: 0.35rem 0;
  border-radius: var(--radius-sm);
  text-align: center;
}

.tx-label {
  margin: 0 0 0.5rem;
  color: var(--text-dim);
  font-size: 0.94rem;
}

.tutorial-footnote {
  margin: 1.5rem 0 0;
  font-size: 0.9rem;
  color: var(--text-faint);
}

/* -------------------------------------------------------------------------
   Platform cards (install)
   ------------------------------------------------------------------------- */

.platform-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.1rem;
  margin: 0 0 1.7rem;
}

.platform-card {
  background: var(--hull);
  border: 1px solid rgba(202, 160, 63, 0.14);
  border-radius: var(--radius-md);
  padding: 1.3rem 1.35rem;
}

.platform-code {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  margin-bottom: 0.6rem;
}

.platform-card p {
  margin: 0 0 0.9rem;
  color: var(--text-dim);
  font-size: 0.94rem;
}

.platform-card pre {
  white-space: pre-wrap;
  word-break: break-word;
  font-size: 0.83rem;
  margin-bottom: 1rem;
}

.platform-card .btn {
  display: block;
  text-align: center;
}

/* -------------------------------------------------------------------------
   Footer
   ------------------------------------------------------------------------- */

.site-footer {
  max-width: var(--content-w);
  margin: 0 auto;
  padding: 1.8rem 1.4rem 2.4rem;
  color: var(--text-faint);
  font-size: 0.85rem;
}

.site-footer p {
  margin: 0 0 0.3rem;
}

.site-footer a {
  color: var(--text-dim);
}

.site-footer-sub {
  font-family: var(--font-mono);
  font-size: 0.78rem;
}

/* -------------------------------------------------------------------------
   Responsive
   ------------------------------------------------------------------------- */

@media (max-width: 900px) {
  .hero,
  .two-col {
    grid-template-columns: 1fr;
  }

  .hero-porthole {
    order: -1;
  }

  .porthole-frame {
    width: min(320px, 80%);
    margin: 0 auto;
  }
}

@media (max-width: 720px) {
  .nav-toggle {
    display: inline-flex;
  }

  .topnav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.9rem;
    background: var(--navy-panel);
    border-bottom: 2px solid rgba(202, 160, 63, 0.25);
    padding: 1rem 1.4rem 1.3rem;
    max-height: 0;
    overflow: hidden;
    visibility: hidden;
    opacity: 0;
    transition: max-height 0.25s ease, opacity 0.2s ease, visibility 0.25s;
  }

  .topbar.nav-open .topnav {
    max-height: 70vh;
    overflow-y: auto;
    visibility: visible;
    opacity: 1;
  }

  .topnav-repo {
    align-self: flex-start;
  }
}

@media (max-width: 560px) {
  :root {
    --radius-lg: 20px;
    --radius-md: 14px;
    --gap: 1rem;
  }

  main {
    padding: 0 1rem 2.2rem;
  }

  .hero {
    padding: 2.2rem 0 1.8rem;
  }

  .hero h1 {
    font-size: clamp(1.9rem, 8vw, 2.3rem);
  }

  .lede {
    font-size: 1rem;
  }

  .cta-row {
    flex-direction: column;
    align-items: stretch;
  }

  .btn {
    text-align: center;
  }

  .panel-head {
    padding: 0.95rem 1.2rem;
  }

  .panel-body {
    padding: 1.3rem 1.2rem 1.7rem;
  }

  .transmission-log li {
    grid-template-columns: 1fr;
  }

  .tx-id {
    width: fit-content;
    padding: 0.25rem 0.6rem;
  }
}