/* ---------- Reset & base ---------- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg: #0e1113;
  --bg-panel: #15191b;
  --border: #2a3033;
  --border-soft: #202629;

  --text: #edece6;
  --text-soft: #b7bdbd;
  --text-muted: #939a9c;
  --text-dim: #5f6769;

  --teal: #2ec4b6;
  --teal-dim: rgba(46, 196, 182, 0.1);
  --orange: #c65d2c;
  --orange-text: #d06b38;

  --font-mono: 'SF Mono', 'Fira Code', 'JetBrains Mono', 'Cascadia Code', monospace;
  --font-sans: 'Inter', 'SF Pro Display', -apple-system, 'Segoe UI', sans-serif;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  line-height: 1.6;
  overflow-x: hidden;
}

::selection {
  background: rgba(46, 196, 182, 0.25);
}

body::before {
  content: '01\A 02\A 03\A 04\A 05\A 06\A 07\A 08\A 09\A 10\A 11\A 12\A 13\A 14';
  white-space: pre;
  position: absolute;
  top: 96px;
  left: 24px;
  padding-right: 14px;
  border-right: 1px solid var(--border-soft);
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 2.6;
  color: var(--text-dim);
  opacity: 0.55;
  pointer-events: none;
  z-index: 0;
}

.PageIndex {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ---------- Header ---------- */
.Header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(14, 17, 19, 0.86);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-soft);
}

.Header .Content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.Header .block {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.Header .title {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text);
  text-decoration: none;
}

.Header .title::before {
  content: '';
  width: 26px;
  height: 26px;
  border-radius: 7px;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 32 32'%3E%3Crect width='32' height='32' rx='8' fill='%232ec4b6'/%3E%3Cpath d='M18,5L9,18L15,18L13,27L23,14L17,14Z' fill='%23ffffff'/%3E%3C/svg%3E")
    no-repeat center / contain;
}

.Header .Btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 500;
  text-decoration: none;
  transition:
    color 0.2s,
    border-color 0.2s;
}

.Header .Btn:hover {
  color: var(--text);
  border-color: var(--teal);
  background: var(--teal-dim);
}

/* ---------- Body ---------- */
.Body {
  flex: 1;
  display: flex;
  align-items: center;
  padding: 120px 24px 60px;
}

.Body .Content {
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
}

.Body .block1 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.Body .block:first-child {
  animation: fadeInUp 0.6s ease-out both;
}

.Body .title {
  font-family: var(--font-sans);
  font-size: 64px;
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -2px;
  margin-bottom: 24px;
  color: var(--text);
}

.Body .title .hl {
  color: var(--orange);
}

.Body .version {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--teal);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 5px 12px;
  width: fit-content;
  background: var(--bg-panel);
  margin-bottom: 16px;
}

.Body .subtitle {
  font-size: 20px;
  font-weight: 600;
  color: var(--text-soft);
  margin-bottom: 14px;
  letter-spacing: -0.3px;
}

.Body .text {
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-muted);
  margin-bottom: 32px;
  max-width: 480px;
}

.Body .BtnBlack {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 28px;
  background: var(--teal);
  border: none;
  border-radius: 10px;
  color: #0b100f;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
}

.Body .BtnBlack:hover {
  background: #3ad0c0;
}

.Body .BtnBlack::after {
  content: '\2192';
  font-size: 16px;
  transition: transform 0.2s;
}

.Body .BtnBlack:hover::after {
  transform: translateX(4px);
}

/* ---------- Terminal preview ---------- */
.Body .block:last-child {
  position: relative;
  animation: fadeInUp 0.6s ease-out 0.15s both;
}

.Body .block:last-child::before {
  content: '🦀 Rust core';
  position: absolute;
  top: -14px;
  right: 32px;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 5px 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  z-index: 2;
}

.preview {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px 32px;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.9;
  color: var(--text-muted);
  position: relative;
  overflow: hidden;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35);
}

.preview::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, rgba(46, 196, 182, 0.45), transparent 70%);
}

.preview .comment {
  color: #6d7578;
}

.preview .command {
  color: #d6d9d8;
}

.preview .app {
  color: var(--teal);
}

.preview .path {
  color: var(--orange-text);
}

.preview .tool {
  color: var(--teal);
}

/* ---------- Footer ---------- */
.Footer {
  border-top: 1px solid var(--border-soft);
  background: transparent;
}

.Footer .Content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.Footer .block {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  gap: 16px;
}

.Footer .title {
  font-size: 13px;
  color: var(--text-dim);
}

.Footer .block::after {
  content: 'Rust core \00B7  Compose Multiplatform UI';
  font-size: 12px;
  color: var(--text-dim);
}

/* ---------- Animation ---------- */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------- Responsive ---------- */
@media (max-width: 1440px) {
  body::before {
    display: none;
  }
}

@media (max-width: 1024px) {
  .Body .block1 {
    grid-template-columns: 1fr;
    gap: 60px;
  }
  .Body .title {
    font-size: 48px;
  }
  .Body .text {
    max-width: 100%;
  }
  .Body .block:last-child::before {
    display: none;
  }
}

@media (max-width: 640px) {
  .Body {
    padding: 100px 16px 45px;
  }
  .Body .block1 {
    gap: 45px;
  }
  .Body .title {
    font-size: 36px;
    letter-spacing: -1px;
  }
  .Body .subtitle {
    font-size: 16px;
  }
  .preview {
    padding: 40px 20px 20px;
    font-size: 11px;
  }
  .Footer .block::after {
    display: none;
  }
}

@media (max-width: 450px) {
  .Header .title {
    font-size: 12px;
    letter-spacing: 0.14em;
  }
  .Header .Btn {
    padding: 5px 10px;
  }
}

@media (max-width: 400px) {
  .Body .subtitle {
    font-size: 14px;
  }
  .Body .text {
    font-size: 14px;
  }
}

/* ---------- Stats ---------- */
.Stats {
  border-top: 1px solid var(--border-soft);
}

.Stats .Content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.Stats .block {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px 24px;
  padding: 18px 0;
}

.Stats .block div {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--text-muted);
}

.Stats .v {
  color: var(--teal);
  margin-right: 8px;
}

/* ---------- Sections ---------- */
.Section {
  padding: 80px 24px;
  border-top: 1px solid var(--border-soft);
}

.Section .Content {
  max-width: 1200px;
  margin: 0 auto;
}

.kicker {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 12px;
}

.h2 {
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.8px;
  color: var(--text);
  margin-bottom: 40px;
}

/* ---------- Steps ---------- */
.Steps {
  display: flex;
  align-items: stretch;
  gap: 14px;
}

.Step {
  flex: 1;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
}

.Step .num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-dim);
  margin-bottom: 12px;
}

.Step .name {
  font-weight: 600;
  font-size: 15px;
  margin-bottom: 6px;
}

.Step .desc {
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-muted);
}

.Step.teal {
  border-color: rgba(46, 196, 182, 0.5);
}

.Step.teal .num {
  color: var(--teal);
}

.Step.orange {
  border-color: rgba(198, 93, 44, 0.55);
}

.Step.orange .num {
  color: var(--orange-text);
}

.Arrow {
  align-self: center;
  color: var(--text-dim);
  font-family: var(--font-mono);
}

/* ---------- Cards ---------- */
.Grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.Card {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 22px;
  transition: border-color 0.2s;
}

.Card .num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-dim);
  margin-bottom: 12px;
}

.Card .name {
  font-weight: 600;
  font-size: 15px;
  margin-bottom: 8px;
}

.Card .desc {
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-muted);
}

/* ---------- Split ---------- */
.Split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 64px;
  align-items: center;
}

.Split .h2 {
  margin-bottom: 20px;
}

.How .row {
  display: flex;
  gap: 14px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border-soft);
  font-size: 14px;
  color: var(--text-muted);
}

.How .row:last-child {
  border-bottom: none;
}

.How .row span {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--teal);
  padding-top: 3px;
  flex-shrink: 0;
}

/* ---------- Docs ---------- */
.Docs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  align-items: start;
}

.Docs .Card {
  padding: 22px 22px 10px;
}

.Docs .Card a {
  display: block;
  padding: 9px 0;
  font-size: 14px;
  color: var(--text-muted);
  text-decoration: none;
  border-bottom: 1px solid var(--border-soft);
  transition: color 0.2s;
}

.Docs .Card a:hover {
  color: var(--teal);
}

.Docs .Card a:last-child {
  border-bottom: none;
}

/* ---------- Sections responsive ---------- */
@media (max-width: 1024px) {
  .Steps {
    flex-wrap: wrap;
  }
  .Step {
    flex: 1 1 calc(50% - 7px);
  }
  .Arrow {
    display: none;
  }
  .Grid {
    grid-template-columns: 1fr 1fr;
  }
  .Split {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .Docs {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .Section {
    padding: 56px 16px;
  }
  .h2 {
    font-size: 24px;
    margin-bottom: 28px;
  }
  .Step {
    flex: 1 1 100%;
  }
  .Grid {
    grid-template-columns: 1fr;
  }
  .Stats .block {
    justify-content: flex-start;
  }
}