/* ============================================================
   opencode-autorecord — landing page
   Design language: warm black + lemon accent, IBM Plex
   (inspired by opencode.ai)
   ============================================================ */

:root {
  --font-sans: "IBM Plex Sans", ui-sans-serif, system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;

  --radius-sm: 3px;
  --radius-md: 6px;
  --radius-lg: 10px;

  --header-h: 64px;
  --content-w: 1080px;

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

/* ---------- Themes (mirrors opencode.ai palette) ---------- */

[data-theme="dark"] {
  --bg: hsl(0, 9%, 7%);
  --bg-weak: hsl(0, 6%, 10%);
  --bg-strong: hsl(0, 5%, 12%);
  --bg-raised: hsla(0, 100%, 3%, 0.35);
  --text-strong: hsl(0, 15%, 94%);
  --text: hsl(0, 4%, 71%);
  --text-weak: hsl(0, 1%, 60%);
  --text-weaker: hsl(0, 3%, 28%);
  --border: hsl(0, 3%, 28%);
  --border-weak: hsl(0, 4%, 23%);
  --accent: hsl(62, 100%, 90%);
  --accent-weak: hsl(60, 20%, 8%);
  --accent-text: hsl(0, 9%, 7%);
  --icon: hsl(0, 1%, 55%);
  --logo-light: #cfcecd;
  --logo-dark: #656363;
  --shadow: 0 20px 60px hsla(0, 100%, 0%, 0.5);
  --code-bg: hsl(0, 6%, 9%);
  --rec-color: hsl(62, 100%, 70%);
}

[data-theme="light"] {
  --bg: hsl(0, 20%, 99%);
  --bg-weak: hsl(0, 8%, 97%);
  --bg-strong: hsl(0, 8%, 94%);
  --bg-raised: hsla(0, 100%, 3%, 0.02);
  --text-strong: hsl(0, 5%, 12%);
  --text: hsl(0, 1%, 39%);
  --text-weak: hsl(0, 2%, 45%);
  --text-weaker: hsl(30, 2%, 60%);
  --border: hsl(30, 2%, 81%);
  --border-weak: hsla(0, 100%, 3%, 0.12);
  --accent: hsl(62, 70%, 42%);
  --accent-weak: hsl(64, 74%, 92%);
  --accent-text: #ffffff;
  --icon: hsl(10, 3%, 43%);
  --logo-light: #4b4646;
  --logo-dark: #b7b1b1;
  --shadow: 0 20px 60px hsla(0, 50%, 10%, 0.08);
  --code-bg: #ffffff;
  --rec-color: hsl(62, 70%, 45%);
}

/* ---------- Base ---------- */

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

html { scroll-behavior: smooth; scroll-padding-top: var(--header-h); }

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  transition: background 0.35s var(--ease), color 0.35s var(--ease);
}

::selection { background: var(--accent); color: var(--accent-text); }

.container { width: min(var(--content-w), 100% - 48px); margin-inline: auto; }

a { color: var(--text); text-decoration: none; }

code {
  font-family: var(--font-mono);
  font-size: 0.86em;
  color: var(--accent);
  background: var(--accent-weak);
  padding: 0.15em 0.45em;
  border-radius: var(--radius-sm);
}

/* ---------- Header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-h);
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-weak);
}

.header-inner { display: flex; align-items: center; gap: 24px; height: 100%; }

.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 600; color: var(--text-strong); }
.brand-mark { display: block; flex: none; }
.brand-name { font-size: 15px; letter-spacing: -0.01em; }

.header-nav { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.header-nav a {
  font-size: 14px;
  color: var(--text-weak);
  padding: 7px 12px;
  border-radius: var(--radius-md);
  transition: color 0.2s, background 0.2s;
}
.header-nav a:hover { color: var(--text-strong); background: var(--bg-weak); }
.header-nav .header-link-github { display: inline-flex; align-items: center; gap: 7px; }

.header-actions { display: flex; align-items: center; gap: 6px; margin-left: 8px; }

.theme-toggle, .lang-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 34px;
  padding: 0 11px;
  border: 1px solid var(--border-weak);
  border-radius: var(--radius-md);
  background: var(--bg-weak);
  color: var(--text-weak);
  font-family: var(--font-sans);
  font-size: 13px;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s, background 0.2s;
}
.theme-toggle:hover, .lang-toggle:hover { color: var(--text-strong); border-color: var(--border); }
.lang-toggle { font-weight: 500; }

.theme-toggle .icon-moon { display: none; }
[data-theme="light"] .theme-toggle .icon-sun { display: none; }
[data-theme="light"] .theme-toggle .icon-moon { display: block; }

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

.hero { position: relative; padding: 96px 0 40px; overflow: hidden; }

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(560px 300px at 50% -10%, var(--accent-weak), transparent 70%),
    radial-gradient(420px 260px at 85% 20%, var(--accent-weak), transparent 70%);
  opacity: 0.8;
}

.hero .container { position: relative; text-align: center; }

.hero-badge {
  display: inline-block;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-weak);
  border: 1px solid var(--border-weak);
  border-radius: 999px;
  padding: 6px 14px;
  margin-bottom: 28px;
  animation: rise 0.7s var(--ease) both;
}

.hero-title {
  font-size: clamp(44px, 7vw, 78px);
  font-weight: 700;
  line-height: 1.04;
  letter-spacing: -0.03em;
  color: var(--text-strong);
}
.hero-title span { display: block; }
.hero-title .accent { color: var(--accent); }
.hero-title span:nth-child(1) { animation: rise 0.7s 0.08s var(--ease) both; }
.hero-title span:nth-child(2) { animation: rise 0.7s 0.16s var(--ease) both; }

.hero-sub {
  max-width: 640px;
  margin: 26px auto 0;
  font-size: 18px;
  color: var(--text-weak);
  animation: rise 0.7s 0.32s var(--ease) both;
}

/* ---------- Code block ---------- */

.hero-code {
  max-width: 720px;
  margin: 48px auto 0;
  text-align: left;
  border: 1px solid var(--border-weak);
  border-radius: var(--radius-lg);
  background: var(--code-bg);
  box-shadow: var(--shadow);
  overflow: hidden;
  animation: rise 0.7s 0.4s var(--ease) both;
}

.code-tabs { display: flex; gap: 2px; padding: 10px 12px 0; border-bottom: 1px solid var(--border-weak); }
.code-tab {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--text-weak);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  padding: 7px 12px 9px;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s;
}
.code-tab:hover { color: var(--text-strong); }
.code-tab.active { color: var(--accent); border-bottom-color: var(--accent); }

.code-head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 16px;
  background: var(--bg-raised);
  border-bottom: 1px solid var(--border-weak);
}
.code-dots { display: inline-flex; gap: 6px; }
.code-dots i { width: 10px; height: 10px; border-radius: 50%; background: var(--border); }
.code-dots i:nth-child(1) { background: hsl(0, 70%, 60%); }
.code-dots i:nth-child(2) { background: hsl(45, 80%, 60%); }
.code-dots i:nth-child(3) { background: hsl(120, 45%, 55%); }
.code-path { font-family: var(--font-mono); font-size: 12.5px; color: var(--text-weaker); }

.copy-btn {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-weak);
  background: var(--bg-strong);
  border: 1px solid var(--border-weak);
  border-radius: var(--radius-sm);
  padding: 4px 10px;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s, background 0.2s;
}
.copy-btn:hover { color: var(--accent); border-color: var(--accent); }
.copy-btn.copied { color: var(--accent); border-color: var(--accent); background: var(--accent-weak); }

.code-pane { display: none; }
.code-pane.active { display: block; animation: fade 0.25s var(--ease) both; }
.code-pane pre {
  padding: 18px 20px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--text-strong);
  background: none;
}
.code-pane code { background: none; padding: 0; color: inherit; }

.c-k { color: hsl(190, 60%, 65%); }
.c-s { color: hsl(62, 85%, 72%); }
.c-p { color: var(--text-weak); }
.c-t { color: hsl(120, 40%, 60%); }

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

.hero-terminal {
  max-width: 720px;
  margin: 16px auto 0;
  text-align: left;
  border: 1px solid var(--border-weak);
  border-radius: var(--radius-lg);
  background: var(--code-bg);
  overflow: hidden;
  animation: rise 0.7s 0.5s var(--ease) both;
}

.terminal-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  border-bottom: 1px solid var(--border-weak);
  background: var(--bg-raised);
}
.terminal-title { font-family: var(--font-mono); font-size: 11.5px; color: var(--text-weaker); text-transform: uppercase; letter-spacing: 0.06em; }
.terminal-dot { margin-left: auto; width: 9px; height: 9px; border-radius: 50%; background: var(--rec-color); box-shadow: 0 0 0 0 var(--rec-color); animation: pulse 2s infinite; }
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--rec-color) 55%, transparent); }
  70% { box-shadow: 0 0 0 9px transparent; }
  100% { box-shadow: 0 0 0 0 transparent; }
}

.terminal-body {
  min-height: 118px;
  padding: 14px 16px;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.85;
  color: var(--text-weak);
  white-space: pre-wrap;
  word-break: break-all;
}
.terminal-body .t-time { color: var(--text-weaker); }
.terminal-body .t-ok { color: hsl(120, 45%, 55%); }
.terminal-body .t-acc { color: var(--accent); }
.terminal-caret {
  display: inline-block;
  width: 8px;
  height: 15px;
  vertical-align: -2px;
  margin-left: 2px;
  background: var(--accent);
  animation: blink 1s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

/* ---------- Numbers ---------- */

.numbers { padding: 72px 0 8px; }
.numbers-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border: 1px solid var(--border-weak);
  border-radius: var(--radius-lg);
  background: var(--bg-weak);
  overflow: hidden;
}
.number-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 34px 16px;
  text-align: center;
}
.number-item + .number-item { border-left: 1px solid var(--border-weak); }
.number-value { font-size: 38px; font-weight: 700; letter-spacing: -0.03em; color: var(--text-strong); }
.number-unit { font-size: 13px; font-weight: 600; color: var(--accent); }
.number-label { font-size: 12.5px; color: var(--text-weaker); }

/* ---------- Sections ---------- */

.section { padding: 104px 0; }
.section-alt { background: var(--bg-weak); border-block: 1px solid var(--border-weak); }

.section-title {
  font-size: clamp(30px, 4.5vw, 44px);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-strong);
  text-align: center;
  margin-bottom: 14px;
}
.section-sub {
  max-width: 560px;
  margin: 0 auto 56px;
  text-align: center;
  font-size: 16.5px;
  color: var(--text-weak);
}

/* ---------- Feature cards ---------- */

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.feature-card {
  border: 1px solid var(--border-weak);
  border-radius: var(--radius-lg);
  background: var(--bg);
  padding: 30px 28px;
  transition: border-color 0.25s, transform 0.25s var(--ease), box-shadow 0.25s;
  position: relative;
  overflow: hidden;
}
.feature-card::after {
  content: "";
  position: absolute;
  inset: auto -40% -60% -40%;
  height: 70%;
  background: radial-gradient(420px 180px at 50% 100%, var(--accent-weak), transparent 70%);
  opacity: 0;
  transition: opacity 0.35s;
  pointer-events: none;
}
.feature-card:hover { border-color: var(--border); transform: translateY(-3px); box-shadow: var(--shadow); }
.feature-card:hover::after { opacity: 1; }

.feature-icon {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border: 1px solid var(--border-weak);
  border-radius: var(--radius-md);
  background: var(--bg-weak);
  color: var(--accent);
  margin-bottom: 18px;
}
.feature-card h3 { font-size: 17px; font-weight: 600; color: var(--text-strong); margin-bottom: 8px; }
.feature-card p { font-size: 14.5px; color: var(--text-weak); }

/* ---------- Split (storage) ---------- */

.split { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.split-text .section-title { text-align: left; }
.split-text > p { margin-bottom: 16px; font-size: 16px; }

.check-list { list-style: none; margin-top: 22px; display: grid; gap: 12px; }
.check-list li {
  position: relative;
  padding-left: 30px;
  font-size: 14.5px;
  color: var(--text-weak);
}
.check-list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 4px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 1px solid var(--accent);
  background:
    linear-gradient(135deg, transparent 42%, var(--accent) 42% 50%, transparent 50%) 4px 7px / 8px 5px no-repeat,
    linear-gradient(45deg, transparent 46%, var(--accent) 46% 54%, transparent 54%) 2px 9px / 6px 4px no-repeat;
  transform: rotate(-4deg);
}

.split-code {
  border: 1px solid var(--border-weak);
  border-radius: var(--radius-lg);
  background: var(--code-bg);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.split-code pre { padding: 20px; overflow-x: auto; font-family: var(--font-mono); font-size: 13.5px; line-height: 1.85; color: var(--text-weak); }
.split-code code { background: none; padding: 0; color: inherit; }
.tree .t-dir { color: var(--text-strong); }
.tree .t-file { color: var(--accent); }
.tree .t-com { color: var(--text-weaker); }
.tree .t-dir::after { content: "/"; color: var(--text-weaker); }

/* ---------- Preview ---------- */

.preview-main, .preview-card {
  border: 1px solid var(--border-weak);
  border-radius: var(--radius-lg);
  background: var(--code-bg);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform 0.3s var(--ease), border-color 0.3s;
}
.preview-main { max-width: 880px; margin: 0 auto; }
.preview-main:hover, .preview-card:hover { transform: translateY(-4px); border-color: var(--border); }
.preview-main img, .preview-card img { width: 100%; display: block; }

.preview-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  max-width: 880px;
  margin: 16px auto 0;
}

@media (max-width: 900px) {
  .preview-grid { grid-template-columns: 1fr; }
}

/* ---------- Steps ---------- */

.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.step {
  border: 1px solid var(--border-weak);
  border-radius: var(--radius-lg);
  background: var(--bg);
  padding: 28px;
  transition: border-color 0.25s;
}
.step:hover { border-color: var(--border); }
.step-num {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--accent);
  border: 1px solid var(--border-weak);
  border-radius: var(--radius-sm);
  padding: 3px 9px;
  display: inline-block;
  margin-bottom: 16px;
}
.step h3 { font-size: 17px; font-weight: 600; color: var(--text-strong); margin-bottom: 8px; }
.step p { font-size: 14.5px; color: var(--text-weak); margin-bottom: 18px; }
.step-code {
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.7;
  background: var(--bg-weak);
  border: 1px solid var(--border-weak);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  overflow-x: auto;
  color: var(--text);
}
.step-code code { background: none; padding: 0; color: inherit; }

/* ---------- FAQ ---------- */

.narrow { max-width: 760px; }
.faq-list { display: grid; gap: 10px; }
.faq-item {
  border: 1px solid var(--border-weak);
  border-radius: var(--radius-md);
  background: var(--bg);
  overflow: hidden;
  transition: border-color 0.2s;
}
.faq-item:hover { border-color: var(--border); }
.faq-item[open] { border-color: var(--accent); }
.faq-item summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 17px 22px;
  font-size: 15.5px;
  font-weight: 500;
  color: var(--text-strong);
  user-select: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--text-weaker);
  transition: transform 0.25s var(--ease), color 0.2s;
}
.faq-item[open] summary::after { transform: rotate(45deg); color: var(--accent); }
.faq-item p { padding: 0 22px 20px; font-size: 14.5px; color: var(--text-weak); }

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

.site-footer { border-top: 1px solid var(--border-weak); padding: 56px 0 32px; background: var(--bg-weak); }
.footer-inner { display: flex; align-items: flex-start; justify-content: space-between; gap: 32px; flex-wrap: wrap; }
.footer-tag { margin-top: 10px; font-size: 13.5px; color: var(--text-weaker); }
.footer-links { display: flex; gap: 8px; flex-wrap: wrap; }
.footer-links a {
  font-size: 14px;
  color: var(--text-weak);
  padding: 8px 13px;
  border: 1px solid var(--border-weak);
  border-radius: var(--radius-md);
  transition: color 0.2s, border-color 0.2s;
}
.footer-links a:hover { color: var(--text-strong); border-color: var(--border); }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 44px;
  padding-top: 22px;
  border-top: 1px solid var(--border-weak);
  font-size: 12.5px;
  color: var(--text-weaker);
}

/* ---------- Light theme overrides for hardcoded colors ---------- */

[data-theme="light"] .c-k { color: hsl(190, 65%, 30%); }
[data-theme="light"] .c-s { color: hsl(62, 80%, 28%); }
[data-theme="light"] .c-t { color: hsl(120, 45%, 32%); }
[data-theme="light"] .terminal-body .t-ok { color: hsl(120, 45%, 35%); }

/* ---------- Reveal on scroll ---------- */

[data-reveal] { opacity: 0; transform: translateY(18px); transition: opacity 0.7s var(--ease), transform 0.7s var(--ease); }
[data-reveal].revealed { opacity: 1; transform: none; }

/* ---------- Keyframes ---------- */

@keyframes rise {
  from { opacity: 0; transform: translateY(22px); }
  to { opacity: 1; transform: none; }
}
@keyframes fade {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: none; }
}

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

@media (max-width: 900px) {
  .features-grid, .steps { grid-template-columns: 1fr 1fr; }
  .numbers-grid { grid-template-columns: 1fr 1fr; }
  .number-item:nth-child(3) { border-left: none; }
  .number-item:nth-child(1), .number-item:nth-child(3) { border-bottom: 1px solid var(--border-weak); }
  .split { grid-template-columns: 1fr; gap: 36px; }
}

@media (max-width: 640px) {
  .features-grid, .steps { grid-template-columns: 1fr; }
  .numbers-grid { grid-template-columns: 1fr; }
  .number-item { border-left: none !important; border-bottom: 1px solid var(--border-weak); }
  .number-item:last-child { border-bottom: none; }
  .hero { padding-top: 72px; }
  .hero-sub { font-size: 16px; }
  .header-nav a:not(.header-link-github) { display: none; }
  .brand-name { font-size: 13.5px; }
}

/* ---------- Reduced motion ---------- */

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
  html { scroll-behavior: auto; }
}