/* bitfroth homepage — design tokens borrowed from Curated (curated.bitfroth.com) */

@property --header-solid {
  syntax: "<number>";
  inherits: true;
  initial-value: 0;
}

@font-face {
  font-family: "Geist";
  src: url("fonts/Geist-Variable.woff2") format("woff2");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Geist Mono";
  src: url("fonts/GeistMono-Variable.woff2") format("woff2");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}

:root {
  --background: 40 14% 98%;
  --foreground: 24 12% 10%;
  --card: 0 0% 100%;
  --border: 32 10% 88%;
  --muted: 36 12% 93%;
  --muted-foreground: 28 7% 42%;
  --primary: 25 95% 42%;
  --accent: 28 90% 94%;
  --accent-foreground: 25 90% 32%;
  --live: 152 55% 36%;
  --radius: 1rem;
  /* DeepSeek Harness glass, retinted: their page is dark-first, so
     highlights have to be loud enough to read on both themes. */
  --glass-blur: 16px;
  --glass: 40 40% 100%;
  --glass-fill: 0.34;
  --glass-fill-raised: 0.5;
  --glass-stroke: 28 16% 36% / 0.16;
  --glass-shine: 0 0% 100%;
  --glass-shine-a: 0.72;
  --glass-sheen: linear-gradient(
    155deg,
    hsl(0 0% 100% / 0.62) 0%,
    hsl(0 0% 100% / 0.16) 16%,
    transparent 44%
  );
  --glass-shadow:
    inset 0 1px 0 hsl(0 0% 100% / 0.78),
    inset 0 0 0 1px hsl(0 0% 100% / 0.28),
    0 2px 8px hsl(24 12% 10% / 0.05),
    0 16px 32px hsl(24 12% 10% / 0.05);
  --glass-glow: 25 95% 42%;
  --atmosphere-1: 25 95% 42%;
  --atmosphere-2: 32 70% 72%;
  --header-solid: 0;
  color-scheme: light;
}

[data-theme="dark"] {
  --background: 24 10% 6%;
  --foreground: 40 12% 90%;
  --card: 26 9% 9%;
  --border: 28 7% 16%;
  --muted: 26 6% 14%;
  --muted-foreground: 30 6% 58%;
  --primary: 32 95% 60%;
  --accent: 28 24% 14%;
  --accent-foreground: 32 90% 68%;
  --live: 152 60% 55%;
  --glass: 40 18% 96%;
  --glass-fill: 0.09;
  --glass-fill-raised: 0.18;
  --glass-stroke: 40 20% 96% / 0.18;
  --glass-shine: 40 30% 100%;
  --glass-shine-a: 0.28;
  --glass-sheen: linear-gradient(
    155deg,
    hsl(0 0% 100% / 0.24) 0%,
    hsl(0 0% 100% / 0.07) 20%,
    transparent 48%
  );
  --glass-shadow:
    inset 0 1px 0 hsl(0 0% 100% / 0.28),
    inset 0 0 0 1px hsl(0 0% 100% / 0.08),
    0 10px 32px hsl(0 0% 0% / 0.32);
  --glass-glow: 32 95% 60%;
  --atmosphere-1: 32 95% 60%;
  --atmosphere-2: 24 28% 28%;
  color-scheme: dark;
}

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

html {
  scroll-behavior: smooth;
  transition: --header-solid 0.55s ease-in-out;
}

body {
  margin: 0;
  background: hsl(var(--background));
  color: hsl(var(--foreground));
  font-family: "Geist", -apple-system, "Segoe UI", sans-serif;
  font-size: 1rem;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection {
  background: hsl(var(--primary) / 0.18);
}

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

.site {
  position: relative;
  isolation: isolate;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

/* Warm washes + a faint grain so frosted surfaces have something to catch. */
.site::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(
      ellipse 80% 52% at 6% -10%,
      hsl(var(--atmosphere-1) / 0.22),
      transparent 58%
    ),
    radial-gradient(
      ellipse 52% 42% at 98% 18%,
      hsl(var(--atmosphere-2) / 0.18),
      transparent 54%
    ),
    radial-gradient(
      ellipse 60% 40% at 50% 62%,
      hsl(var(--atmosphere-1) / 0.08),
      transparent 64%
    ),
    radial-gradient(
      ellipse 50% 34% at 78% 96%,
      hsl(var(--atmosphere-1) / 0.07),
      transparent 60%
    );
}

.site::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: 0.4;
  background-image: radial-gradient(
    circle,
    hsl(var(--foreground) / 0.12) 1px,
    transparent 1px
  );
  background-size: 22px 22px;
  mask-image: linear-gradient(180deg, transparent 0%, black 12%, black 78%, transparent);
  -webkit-mask-image: linear-gradient(
    180deg,
    transparent 0%,
    black 12%,
    black 78%,
    transparent
  );
}

.container {
  width: 100%;
  max-width: 44rem;
  margin-inline: auto;
  padding-inline: 1rem;
}

.mono {
  font-family: "Geist Mono", ui-monospace, monospace;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  padding: calc(0.35rem + 0.2rem * var(--header-solid, 0)) 0.75rem 0.35rem;
  background: transparent;
}

.header-inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 0.45rem;
  padding-inline: 0.85rem 0.5rem;
  border: 1px solid transparent;
  border-radius: 999px;
  background: transparent;
}

/* Glass plate + sheen fade in as the bar peels off the hero. */
.header-inner::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  border-radius: inherit;
  pointer-events: none;
  border: 1px solid hsl(var(--glass-stroke));
  background: hsl(var(--glass) / var(--glass-fill-raised));
  box-shadow: var(--glass-shadow);
  backdrop-filter: blur(var(--glass-blur)) saturate(1.35);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(1.35);
  opacity: var(--header-solid, 0);
}

.header-inner,
.card,
.link-list {
  isolation: isolate;
}

.header-inner::after,
.card::after,
.link-list::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  border-radius: inherit;
  pointer-events: none;
  background: var(--glass-sheen);
}

.header-inner::after {
  opacity: var(--header-solid, 0);
}

.header-inner > *,
.card > *,
.link-list > * {
  position: relative;
  z-index: 1;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: inherit;
  text-decoration: none;
}

.brand-name {
  font-family: "Geist Mono", ui-monospace, monospace;
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.site-nav a {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: 0.4rem 0.75rem;
  border: 1px solid transparent;
  border-radius: 999px;
  font-family: "Geist Mono", ui-monospace, monospace;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: hsl(var(--muted-foreground));
  text-decoration: none;
  transition:
    color 150ms ease,
    border-color 150ms ease,
    box-shadow 150ms ease;
}

.site-nav a::after,
.lang-toggle::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 150%;
  aspect-ratio: 1;
  border-radius: 50%;
  opacity: 0;
  z-index: -1;
  pointer-events: none;
  transform: translate(-50%, -50%) scale(0);
  transition:
    transform 360ms ease-out,
    opacity 100ms ease;
}

.site-nav a::after {
  background: hsl(var(--glass) / calc(var(--glass-fill) + 0.18));
}

.site-nav a:hover {
  color: hsl(var(--foreground));
  border-color: hsl(var(--glass-stroke));
  box-shadow:
    inset 0 1px 0 hsl(var(--glass-shine) / var(--glass-shine-a)),
    0 2px 8px hsl(var(--glass-glow) / 0.1);
}

.site-nav a:hover::after,
.lang-toggle:hover::after {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
}

.lang-toggle {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  margin-left: 0.25rem;
  padding: 0.4rem 0.75rem;
  border: 1px solid hsl(var(--glass-stroke));
  border-radius: 999px;
  background: hsl(var(--glass) / calc(var(--glass-fill) + 0.12));
  backdrop-filter: blur(var(--glass-blur)) saturate(1.3);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(1.3);
  box-shadow:
    inset 0 1px 1px hsl(var(--glass-shine) / var(--glass-shine-a)),
    0 2px 8px hsl(var(--glass-glow) / 0.14);
  cursor: pointer;
  font-family: "Geist Mono", ui-monospace, monospace;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: hsl(var(--foreground));
  transition:
    color 150ms ease,
    border-color 150ms ease,
    box-shadow 150ms ease;
}

.lang-toggle::after {
  background: hsl(var(--glass-shine) / 0.28);
}

.lang-toggle:hover {
  border-color: hsl(var(--primary) / 0.45);
  box-shadow:
    inset 0 1px 1px hsl(var(--glass-shine) / 0.9),
    0 4px 14px hsl(var(--glass-glow) / 0.24);
}

@media (max-width: 480px) {
  .brand-name {
    font-size: 0.9375rem;
    letter-spacing: 0.1em;
  }

  .site-nav {
    gap: 0;
  }

  .site-nav a,
  .lang-toggle {
    font-size: 0.6875rem;
    letter-spacing: 0.08em;
    padding: 0.3rem 0.4rem;
  }

  .lang-toggle {
    margin-left: 0.125rem;
  }
}

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

.hero {
  position: relative;
  padding-block: 4.5rem 3.5rem;
}

/* Dot-grid texture, same as Curated's hero — grounds the title on the page. */
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: radial-gradient(
    circle,
    hsl(var(--foreground) / 0.11) 1px,
    transparent 1px
  );
  background-size: 24px 24px;
  mask-image: radial-gradient(ellipse 70% 80% at 20% 0%, black, transparent);
  -webkit-mask-image: radial-gradient(
    ellipse 70% 80% at 20% 0%,
    black,
    transparent
  );
}

.hero > * {
  position: relative;
}

.eyebrow {
  margin: 0 0 1rem;
  font-family: "Geist Mono", ui-monospace, monospace;
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: hsl(var(--muted-foreground));
}

.hero h1 {
  margin: 0;
  max-width: 34rem;
  font-size: clamp(1.875rem, 5.5vw, 2.625rem);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  text-wrap: balance;
}

.lede {
  margin: 1.25rem 0 0;
  max-width: 32rem;
  font-size: 1.0625rem;
  color: hsl(var(--muted-foreground));
}

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

.section {
  padding-block: 2rem;
  scroll-margin-top: 5rem;
}

.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 1.25rem;
}

.section-label {
  margin: 0;
  font-family: "Geist Mono", ui-monospace, monospace;
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: hsl(var(--muted-foreground));
}

.section-meta {
  font-family: "Geist Mono", ui-monospace, monospace;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  color: hsl(var(--muted-foreground));
}

/* ---------- project cards ---------- */

.card-grid {
  display: grid;
  gap: 0.75rem;
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .card-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
  padding: 1.25rem;
  background: hsl(var(--glass) / var(--glass-fill));
  border: 1px solid hsl(var(--glass-stroke));
  border-radius: var(--radius);
  box-shadow: var(--glass-shadow);
  backdrop-filter: blur(var(--glass-blur)) saturate(1.3);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(1.3);
  color: inherit;
  text-decoration: none;
  transform: perspective(800px) rotateX(0deg) rotateY(0deg) scale(1);
  transform-style: preserve-3d;
  transition:
    border-color 180ms ease,
    background-color 180ms ease,
    box-shadow 180ms ease;
}

.card::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  border-radius: inherit;
  pointer-events: none;
  opacity: var(--spot-a, 0);
  transition: opacity 300ms ease;
  background: radial-gradient(
    circle 180px at var(--spot-x, 50%) var(--spot-y, 50%),
    hsl(var(--glass-glow) / 0.16),
    transparent 70%
  );
}

a.card:hover {
  border-color: hsl(var(--primary) / 0.5);
  background: hsl(var(--glass) / calc(var(--glass-fill) + 0.1));
  box-shadow:
    inset 0 1px 0 hsl(var(--glass-shine) / 0.85),
    inset 0 0 0 1px hsl(var(--glass-shine) / 0.18),
    0 0 0 1px hsl(var(--primary) / 0.12),
    0 10px 28px hsl(var(--glass-glow) / 0.16);
}

a.card:hover::after {
  opacity: 1;
}

.card-soon {
  border-style: dashed;
  background: hsl(var(--glass) / 0.16);
  box-shadow:
    inset 0 1px 0 hsl(var(--glass-shine) / 0.35),
    inset 0 0 0 1px hsl(var(--glass-shine) / 0.08);
}

.card-soon::after {
  opacity: 0.45;
}

.card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.card-name {
  font-weight: 600;
  letter-spacing: -0.01em;
}

.card-desc {
  margin: 0;
  flex: 1;
  font-size: 0.875rem;
  color: hsl(var(--muted-foreground));
}

.card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  font-family: "Geist Mono", ui-monospace, monospace;
  font-size: 0.75rem;
  color: hsl(var(--muted-foreground));
}

.card-tag {
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.card-url {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.arrow {
  display: inline-block;
  transition: transform 150ms ease;
}

a.card:hover .arrow,
.link-row:hover .arrow {
  transform: translate(2px, -2px);
  color: hsl(var(--primary));
}

.badge {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.22rem 0.55rem;
  border: 1px solid transparent;
  border-radius: 8px;
  font-family: "Geist Mono", ui-monospace, monospace;
  font-size: 0.625rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  white-space: nowrap;
}

/* Metallic rim: bright corners, dim mid — DeepSeek's badge lighting,
   retinted to live green / warm paper instead of their blue. */
.badge-live {
  color: hsl(var(--live));
  background:
    linear-gradient(hsl(152 32% 94% / 0.9), hsl(152 32% 94% / 0.9)) padding-box,
    linear-gradient(
      135deg,
      hsl(152 55% 70% / 0.9) 0%,
      hsl(var(--live) / 0.28) 38%,
      hsl(var(--live) / 0.1) 68%,
      hsl(0 0% 100% / 0.75) 100%
    )
    border-box;
  box-shadow: 0 0 12px hsl(var(--live) / 0.2);
}

[data-theme="dark"] .badge-live {
  color: hsl(152 45% 82%);
  background:
    linear-gradient(hsl(152 28% 12% / 0.62), hsl(152 28% 12% / 0.62)) padding-box,
    linear-gradient(
      135deg,
      hsl(152 60% 78% / 0.55) 0%,
      hsl(var(--live) / 0.18) 38%,
      hsl(var(--live) / 0.06) 68%,
      hsl(0 0% 100% / 0.24) 100%
    )
    border-box;
  box-shadow: 0 0 14px hsl(var(--live) / 0.2);
}

.badge-live .dot {
  width: 0.375rem;
  height: 0.375rem;
  border-radius: 999px;
  background: hsl(var(--live));
  box-shadow: 0 0 6px hsl(var(--live) / 0.85);
}

.badge-soon {
  color: hsl(var(--muted-foreground));
  background:
    linear-gradient(hsl(var(--muted) / 0.72), hsl(var(--muted) / 0.72)) padding-box,
    linear-gradient(
      135deg,
      hsl(0 0% 100% / 0.75) 0%,
      hsl(0 0% 100% / 0.08) 35%,
      hsl(0 0% 100% / 0.04) 65%,
      hsl(0 0% 100% / 0.5) 100%
    )
    border-box;
  box-shadow:
    0 0 16px hsl(0 0% 100% / 0.08),
    0 0 32px hsl(0 0% 100% / 0.04);
}

[data-theme="dark"] .badge-soon {
  background:
    linear-gradient(hsl(0 0% 0% / 0.28), hsl(0 0% 0% / 0.28)) padding-box,
    linear-gradient(
      135deg,
      hsl(0 0% 100% / 0.42) 0%,
      hsl(0 0% 100% / 0.08) 35%,
      hsl(0 0% 100% / 0.04) 65%,
      hsl(0 0% 100% / 0.28) 100%
    )
    border-box;
}

/* ---------- contact rows ---------- */

.link-list {
  position: relative;
  margin: 0;
  padding: 0.15rem 0;
  list-style: none;
  border: 1px solid hsl(var(--glass-stroke));
  border-radius: var(--radius);
  background: hsl(var(--glass) / var(--glass-fill));
  box-shadow: var(--glass-shadow);
  backdrop-filter: blur(var(--glass-blur)) saturate(1.3);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(1.3);
}

.link-list li {
  position: relative;
  z-index: 1;
}

.link-list li + li {
  border-top: 1px solid hsl(var(--glass-stroke));
}

.link-row {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  padding: 0.875rem 1rem;
  color: inherit;
  text-decoration: none;
  transition: background-color 150ms ease;
}

.link-row:hover {
  background: hsl(var(--glass) / 0.22);
}

.link-label {
  min-width: 6rem;
  font-family: "Geist Mono", ui-monospace, monospace;
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  transition: color 150ms ease;
}

.link-row:hover .link-label {
  color: hsl(var(--primary));
}

.link-handle {
  flex: 1;
  font-size: 0.875rem;
  color: hsl(var(--muted-foreground));
}

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

.site-footer {
  margin-top: auto;
  border-top: 1px solid hsl(var(--glass-stroke));
  box-shadow: inset 0 1px 0 hsl(var(--glass-shine) / calc(var(--glass-shine-a) * 0.45));
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 1.5rem 2.5rem;
  font-family: "Geist Mono", ui-monospace, monospace;
  font-size: 0.75rem;
  color: hsl(var(--muted-foreground));
}

/* ---------- noscript ---------- */

.noscript-list {
  margin: 0;
  padding-left: 1.25rem;
}

.noscript-list a {
  color: hsl(var(--primary));
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .card,
  .arrow,
  .site-nav a,
  .link-label,
  .lang-toggle,
  .link-row,
  .site-nav a::after,
  .lang-toggle::after,
  .card::before {
    transition: none;
  }

  a.card {
    transform: none;
  }
}

@media (prefers-reduced-transparency: reduce) {
  .site::before,
  .site::after,
  .header-inner::before,
  .header-inner::after,
  .card::after,
  .card::before,
  .link-list::after {
    display: none;
  }

  .header-inner,
  .card,
  .card-soon,
  .lang-toggle,
  .badge,
  .link-list,
  .link-row:hover {
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    box-shadow: none;
  }

  .header-inner,
  .card,
  .link-list {
    background: hsl(var(--card));
    border-color: hsl(var(--border));
  }

  .card-soon {
    background: transparent;
  }

  .lang-toggle {
    background: hsl(var(--muted));
    border-color: hsl(var(--border));
  }

  .badge,
  .badge-live,
  .badge-soon,
  [data-theme="dark"] .badge-live,
  [data-theme="dark"] .badge-soon {
    background: transparent;
    box-shadow: none;
    border-color: hsl(var(--border));
  }

  .badge-live {
    border-color: hsl(var(--live) / 0.4);
  }

  .link-row:hover {
    background: hsl(var(--muted));
  }
}

@supports not (
  (backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))
) {
  .header-inner::before {
    background: hsl(var(--card));
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }

  .card,
  .link-list {
    background: hsl(var(--card));
  }

  .card-soon {
    background: transparent;
  }

  .lang-toggle {
    background: hsl(var(--muted));
  }
}