:root {
  --ink: #131416;
  --mut: #5b5e66;
  --line: #e6e7ea;
  --soft: #f6f6f8;
  --o: #FF6B35;
  --od: #c2410c;
  --code: #15171b;
  box-sizing: border-box;
  color-scheme: light;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 76px;
}

body {
  margin: 0;
  background: #fff;
  color: var(--ink);
  font: 400 0.95rem/1.65 Inter, system-ui, -apple-system, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3 {
  font-family: 'Space Grotesk', system-ui, sans-serif;
  font-weight: 600;
  margin: 0;
  letter-spacing: -0.02em;
  color: var(--ink);
  line-height: 1.2;
}

h1 {
  font-size: clamp(1.65rem, 3.2vw, 2.2rem);
  margin-bottom: 14px;
}

h2 {
  font-size: clamp(1.25rem, 2.4vw, 1.55rem);
  margin: 34px 0 14px;
}

h3 {
  font-size: 1.05rem;
  margin: 22px 0 8px;
}

p {
  margin: 0 0 1em;
  color: var(--mut);
  font-size: 0.93rem;
  line-height: 1.65;
}

.lead {
  font-size: 1.05rem;
  line-height: 1.6;
  color: var(--ink);
  margin-bottom: 16px;
}

a {
  color: inherit;
  text-decoration: none;
}

ul {
  margin: 0 0 1em;
  padding-left: 1.25em;
  color: var(--mut);
  font-size: 0.93rem;
}

li {
  margin: 0.35em 0;
  line-height: 1.55;
}

:focus-visible {
  outline: 2px solid var(--o);
  outline-offset: 2px;
  border-radius: 6px;
}

.mono, code, pre, kbd {
  font-family: ui-monospace, 'Roboto Mono', Menlo, Consolas, monospace;
}

code {
  background: var(--soft);
  border: 1px solid var(--line);
  padding: 0.12em 0.4em;
  border-radius: 5px;
  font-size: 0.84em;
  color: var(--od);
  white-space: nowrap;
}

/* Header */
.top {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  gap: 16px;
  height: 64px;
  padding: 0 24px;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}

.logo img {
  display: block;
  height: 19px;
  width: auto;
}

.tag {
  font: 500 0.75rem Inter;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--soft);
  border: 1px solid var(--line);
  color: var(--mut);
}

.search {
  position: relative;
  margin: 0 auto;
  width: min(380px, 36vw);
}

.search input {
  width: 100%;
  height: 38px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--soft);
  padding: 0 38px 0 16px;
  font: 400 0.88rem Inter;
  color: var(--ink);
  transition: border-color 0.15s, background 0.15s;
}

.search input:focus {
  outline: none;
  border-color: var(--o);
  background: #fff;
}

.search kbd {
  position: absolute;
  right: 12px;
  top: 9px;
  font-size: 0.72rem;
  color: var(--mut);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 1px 5px;
  background: #fff;
  line-height: 1.4;
}

.hl {
  font-size: 0.88rem;
  color: var(--mut);
}

.hl:hover {
  color: var(--ink);
}

.pill {
  display: inline-flex;
  align-items: center;
  height: 36px;
  padding: 0 16px;
  border-radius: 999px;
  background: var(--ink);
  color: #fff;
  font: 500 0.85rem Inter;
}

.pill:hover {
  background: #2b2d31;
}

.mb {
  display: none;
  width: 36px;
  height: 36px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

/* Layout */
.layout {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  max-width: 1200px;
  margin: 0 auto;
}

/* Sidebar */
.side {
  position: sticky;
  top: 64px;
  height: calc(100vh - 64px);
  overflow-y: auto;
  padding: 24px 14px 40px 20px;
  border-right: 1px solid var(--line);
  scrollbar-width: thin;
}

.side .g {
  font: 600 0.75rem Inter;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--ink);
  margin: 20px 0 6px 10px;
}

.side .g:first-child {
  margin-top: 0;
}

.side a {
  display: block;
  padding: 5px 10px;
  border-radius: 8px;
  font-size: 0.86rem;
  color: var(--mut);
  line-height: 1.45;
  transition: background 0.12s, color 0.12s;
}

.side a:hover {
  background: var(--soft);
  color: var(--ink);
}

.side a.sub {
  padding: 3px 10px 3px 22px;
  font-size: 0.8rem;
}

.side a.on {
  background: #fff4ee;
  color: var(--od);
  font-weight: 500;
}

/* Main Content */
main {
  padding: 40px clamp(18px, 4vw, 56px) 80px;
  min-width: 0;
  max-width: 100%;
}

main > * {
  max-width: 740px;
  margin-left: auto;
  margin-right: auto;
}

section {
  padding-top: 40px;
}

section:first-of-type {
  padding-top: 0;
}

/* Code block */
.code {
  background: var(--code);
  border-radius: 12px;
  overflow: hidden;
  margin: 14px 0 18px;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.ch {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 12px 8px 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  font: 0.74rem ui-monospace, Menlo, monospace;
  color: #8b8e96;
}

.ch button {
  height: 24px;
  padding: 0 10px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: transparent;
  color: #d4d4d8;
  font: 500 0.72rem Inter;
  cursor: pointer;
}

.ch button:hover {
  border-color: var(--o);
  color: #fff;
}

pre {
  margin: 0;
  padding: 14px 16px;
  overflow-x: auto;
  color: #e8e8ea;
  font-size: 0.81rem;
  line-height: 1.65;
  -webkit-overflow-scrolling: touch;
}

.code .c { color: #7d8088; }
.code .o { color: var(--o); }

/* Callout Note */
.note {
  border: 1px solid var(--line);
  border-left: 3px solid var(--o);
  border-radius: 10px;
  padding: 12px 16px;
  background: var(--soft);
  margin: 14px 0 18px;
  font-size: 0.88rem;
  color: var(--mut);
  line-height: 1.55;
}

.note strong {
  color: var(--ink);
}

/* Comparison */
.cmp {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin: 18px 0 0;
  max-width: none;
}

.cmp > div {
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 18px;
}

.cmp h3 {
  margin: 0 0 10px;
  font-size: 0.98rem;
}

.cmp ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.cmp li {
  position: relative;
  padding-left: 22px;
  font-size: 0.88rem;
  margin: 0.5em 0;
}

.cmp li::before {
  position: absolute;
  left: 0;
  top: 0;
}

.cmp .a li::before {
  content: '✕';
  color: #dc2626;
  font-weight: 700;
}

.cmp .b {
  border-color: rgba(255, 107, 53, 0.45);
  background: #fffaf7;
}

.cmp .b li::before {
  content: '✓';
  color: var(--o);
  font-weight: 700;
}

/* Three column cards */
.three {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 18px 0;
  max-width: none;
}

.three > div {
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 16px;
}

.three h3 {
  font-size: 0.95rem;
  margin: 8px 0 6px;
}

.three p {
  font-size: 0.85rem;
  margin: 0;
  line-height: 1.5;
}

.chip {
  display: inline-block;
  font: 600 0.72rem Inter;
  padding: 2px 8px;
  border-radius: 999px;
}

.r { background: #fde7e7; color: #b91c1c; }
.bl { background: #e5eefe; color: #1d4ed8; }
.am { background: #fdf1de; color: #b45309; }

/* Journey steps */
.jr {
  list-style: none;
  padding: 0;
  margin: 16px 0;
  display: grid;
  gap: 8px;
}

.jr li {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px 14px;
  font-size: 0.86rem;
}

.jr li > i {
  font: 600 0.7rem ui-monospace, Menlo, monospace;
  font-style: normal;
  width: 56px;
  text-align: center;
  padding: 3px 0;
  border-radius: 6px;
  flex: none;
}

.jr .P { background: #e6f7ec; color: #15803d; }
.jr .G { background: #e5eefe; color: #1d4ed8; }
.jr .T { background: #fdf1de; color: #b45309; }
.jr .D { background: #fde7e7; color: #b91c1c; }
.jr span {
  margin-left: auto;
  color: var(--mut);
  text-align: right;
  font-size: 0.84rem;
}

/* Score bar & legend */
.score {
  display: flex;
  height: 12px;
  border-radius: 999px;
  overflow: hidden;
  gap: 2px;
  margin: 16px 0 8px;
}

.score i {
  display: block;
}

.lg {
  display: grid;
  grid-template-columns: 50fr 35fr 15fr;
  gap: 8px;
  font-size: 0.8rem;
  color: var(--mut);
  margin-bottom: 8px;
}

.lg b {
  display: block;
  color: var(--ink);
  font: 600 0.88rem 'Space Grotesk';
}

/* Tables */
.tw {
  overflow-x: auto;
  margin: 12px 0 18px;
  border: 1px solid var(--line);
  border-radius: 10px;
  max-width: none;
  -webkit-overflow-scrolling: touch;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.84rem;
}

th {
  text-align: left;
  font: 600 0.75rem Inter;
  color: var(--mut);
  background: var(--soft);
  padding: 8px 12px;
}

td {
  padding: 8px 12px;
  border-top: 1px solid var(--line);
  color: var(--mut);
  vertical-align: top;
}

td:first-child {
  color: var(--ink);
  white-space: nowrap;
}

td code {
  background: #fff;
}

/* Verdict card */
.verdict {
  margin: 22px 0 0;
  background: var(--ink);
  color: #fff;
  border-radius: 16px;
  padding: 20px 22px;
}

.verdict b {
  font: 600 0.78rem Inter;
  color: var(--o);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.verdict p {
  color: #e4e4e7;
  font: 500 1.05rem/1.5 'Space Grotesk';
  margin: 6px 0 0;
  letter-spacing: -0.01em;
}

/* Tabs */
.tabs {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin: 14px 0;
}

.tabs button {
  height: 32px;
  padding: 0 13px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: #fff;
  font: 500 0.78rem ui-monospace, Menlo, monospace;
  color: var(--mut);
  cursor: pointer;
  transition: background 0.12s, color 0.12s;
}

.tabs button[aria-selected="true"] {
  background: var(--ink);
  border-color: var(--ink);
  color: #fff;
}

/* Stats */
.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 18px 0;
  max-width: none;
}

.stats div {
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 14px 16px;
}

.stats b {
  display: block;
  font: 600 1.45rem 'Space Grotesk';
  color: var(--o);
  letter-spacing: -0.02em;
}

.stats span {
  font-size: 0.82rem;
  color: var(--mut);
}

footer {
  max-width: 740px;
  margin-top: 60px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  font-size: 0.82rem;
  color: var(--mut);
  display: flex;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
}

/* Mobile & Tablet Responsiveness */
@media (max-width: 860px) {
  html {
    scroll-padding-top: 66px;
  }

  .layout {
    display: block;
  }

  .top {
    height: 58px;
    padding: 0 14px;
    gap: 10px;
  }

  .mb {
    display: inline-flex;
  }

  .logo img {
    height: 17px;
  }

  .tag, .hl, .top .pill {
    display: none;
  }

  .search {
    width: auto;
    flex: 1;
    margin: 0;
  }

  .search input {
    height: 35px;
    font-size: 0.84rem;
    padding: 0 14px;
  }

  .search kbd {
    display: none;
  }

  /* Backdrop */
  body.nav::after {
    content: '';
    position: fixed;
    inset: 58px 0 0 0;
    background: rgba(19, 20, 22, 0.4);
    z-index: 40;
    backdrop-filter: blur(2px);
    -webkit-backdrop-filter: blur(2px);
  }

  /* Slide-in navigation drawer */
  .side {
    position: fixed;
    top: 58px;
    left: 0;
    width: 280px;
    max-width: 82vw;
    height: calc(100vh - 58px);
    height: calc(100dvh - 58px);
    z-index: 50;
    background: #fff;
    box-shadow: 4px 0 24px rgba(0, 0, 0, 0.12);
    border-right: 1px solid var(--line);
    transform: translateX(-100%);
    transition: transform 0.22s cubic-bezier(0.16, 1, 0.3, 1);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    padding: 16px 14px 48px;
  }

  body.nav .side {
    transform: translateX(0);
  }

  main {
    padding: 24px 14px 48px;
    max-width: 100%;
    overflow-x: hidden;
  }

  .cmp, .three, .stats {
    grid-template-columns: 1fr;
  }

  .lg {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .jr li {
    flex-wrap: wrap;
    align-items: flex-start;
  }

  .jr span {
    margin-left: 0;
    text-align: left;
    width: 100%;
    font-size: 0.8rem;
  }

  table {
    min-width: 500px;
  }
}

@media (max-width: 480px) {
  h1 {
    font-size: 1.5rem;
  }

  h2 {
    font-size: 1.2rem;
  }

  h3 {
    font-size: 0.98rem;
  }

  body, p, ul, li {
    font-size: 0.88rem;
  }

  pre {
    font-size: 0.76rem;
    padding: 10px 12px;
  }
}