:root {
  --bg: #111111;
  --bg-card: #191919;
  --bg-footer: #161616;
  --border: #2a2a2a;
  --border-bright: #3a3a3a;
  --text: #f5f5f5;
  --text-2: #b3b3b3;
  --text-3: #8f8f8f;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}

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

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family:
    Inter,
    ui-sans-serif,
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  line-height: 1.5;
}

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

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

:focus-visible {
  outline: 1px solid var(--text);
  outline-offset: 2px;
}

.container {
  width: calc(100% - 148px);
  margin-inline: auto;
}

img,
svg,
video,
iframe {
  max-width: 100%;
}

h1,
h2,
h3,
h4,
p,
li,
blockquote,
pre,
code {
  overflow-wrap: break-word;
}

.corner {
  position: fixed;
  width: 18px;
  height: 18px;
  z-index: 1001;
  pointer-events: none;
  border-color: #4f4f4f;
}

.corner-tl {
  top: 18px;
  left: 18px;
  border-top: 1px solid;
  border-left: 1px solid;
}

.corner-tr {
  top: 18px;
  right: 18px;
  border-top: 1px solid;
  border-right: 1px solid;
}

.corner-bl {
  bottom: 18px;
  left: 18px;
  border-bottom: 1px solid;
  border-left: 1px solid;
}

.corner-br {
  bottom: 18px;
  right: 18px;
  border-bottom: 1px solid;
  border-right: 1px solid;
}

.navbar {
  position: fixed;
  top: 35px;
  left: 0;
  width: 100%;
  z-index: 1000;
}

.navbar::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 320px;
  background: linear-gradient(to bottom, rgba(21, 21, 21, 1), rgba(21, 21, 21, 0));
  z-index: -1;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.navbar.scrolled::before {
  opacity: 1;
}

.nav {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 72px;
}

.nav-link {
  position: relative;
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--text);
  padding: 8px 14px;
  transition: transform 0.25s ease, letter-spacing 0.25s ease;
}

.nav-link::before,
.nav-link::after {
  display: inline-block;
  opacity: 0.55;
  transition: opacity 0.25s ease, transform 0.25s ease;
}

.nav-link::before {
  content: '[ ';
  margin-right: 1px;
}

.nav-link::after {
  content: ' ]';
  margin-left: 1px;
}

.nav-link:hover {
  transform: translateY(-1px);
  letter-spacing: 0.16em;
}

.nav-link:hover::before {
  opacity: 1;
  transform: translateX(-2px);
}

.nav-link:hover::after {
  opacity: 1;
  transform: translateX(2px);
}

.nav-links {
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  transform: translateY(-50%);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: block;
  line-height: 0;
}

.nav-logo svg {
  width: 240px;
  height: auto;
  display: block;
}

.hero {
  position: relative;
  min-height: 100vh;
  display: grid;
  align-content: end;
  padding-bottom: 56px;
}

.ascii-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
  opacity: 0.15;
}

.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.25fr 1fr;
  gap: 72px;
  align-items: end;
}

.hero-grid > * {
  min-width: 0;
}

.hero-left h1 {
  font-size: clamp(40px, 4.5vw, 60px);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--text);
  text-wrap: balance;
}

.hero-support {
  margin-top: 30px;
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--text-3);
}

.hero-right {
  width: 100%;
}

.hero-desc {
  font-size: 14px;
  line-height: 1.65;
  color: var(--text-2);
  margin-bottom: 28px;
}

.command-box {
  display: flex;
  align-items: center;
  gap: 12px;
  height: 52px;
  padding: 0 8px 0 18px;
  background: #161616;
  border: 1px solid var(--border);
  min-width: 0;
}

.prompt {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--text-2);
  flex-shrink: 0;
}

.command-box code {
  font-family: var(--mono);
  font-size: 12.5px;
  color: #cfcfcf;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  flex: 1;
  min-width: 0;
}

.copy-btn {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  display: grid;
  place-items: center;
  background: transparent;
  color: var(--text-2);
  cursor: pointer;
  transition: color 0.2s ease;
}

.copy-btn:hover {
  color: var(--text);
}

.copy-btn svg {
  width: 15px;
  height: 15px;
  display: block;
}

.copy-btn .icon-check {
  display: none;
}

.copy-btn.copied {
  color: var(--text);
}

.copy-btn.copied .icon-copy {
  display: none;
}

.copy-btn.copied .icon-check {
  display: block;
}

.github-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-top: 14px;
  padding-top: 11px;
  padding-bottom: 11px;
  background: var(--text);
  color: var(--bg);
  font-size: 14px;
  font-weight: 500;
  transition: background 0.2s ease, box-shadow 0.2s ease;
}

.github-btn:hover {
  background: #e4e4e4;
}

.github-icon {
  width: 17px;
  height: 17px;
  flex-shrink: 0;
}

/* Scroll indicator */
.scroll-indicator {
  position: absolute;
  right: 32px;
  bottom: 44px;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.scroll-indicator span:first-child {
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  font-size: 10px;
  letter-spacing: 0.3em;
  color: var(--text-3);
}

.scroll-line {
  width: 1px;
  height: 56px;
  background: linear-gradient(to bottom, var(--border-bright), transparent);
}

/* ============================================================
   How It Works
   ============================================================ */

.how {
  padding: 150px 0 140px;
  scroll-margin-top: 96px;
}

.how h2 {
  font-size: clamp(34px, 4vw, 48px);
  font-weight: 400;
  letter-spacing: -0.02em;
  color: var(--text);
}

.how-desc {
  margin-top: 24px;
  max-width: 560px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-2);
}

/* Feature cards */
.cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-top: 72px;
}

.card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 26px;
  min-height: 350px;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.card:hover {
  border-color: var(--border-bright);
  transform: translateY(-2px);
}

.card-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
}

.card h3 {
  font-size: 20px;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--text);
}

.card-icon {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border: 1px solid var(--border);
  color: #d5d5d5;
  flex-shrink: 0;
}

.card-icon svg {
  width: 18px;
  height: 18px;
}

.card p {
  font-size: 12px;
  line-height: 1.7;
  color: var(--text-2);
  max-width: 250px;
  margin-top: 48px;
}

/* Live demo link */
.demo-link-wrap {
  margin-top: 56px;
  text-align: center;
}

.demo-link {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--text-2);
  transition: color 0.2s ease, opacity 0.2s ease;
}

.demo-link:hover {
  color: var(--text);
}

.demo-dot {
  width: 10px;
  height: 10px;
  flex-shrink: 0;
}

/* ============================================================
   Footer
   ============================================================ */

.footer {
  background: var(--bg-footer);
  border-top: 1px solid var(--border);
  padding: 96px 0 72px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 64px;
}

.footer-left {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 240px;
}

.footer-logo {
  height: auto;
  width: 373px;
  max-width: 100%;
  display: block;
}

.footer-made {
  font-size: 11px;
  letter-spacing: 0.03em;
  color: var(--text-3);
}

.footer-right {
  display: flex;
  flex-direction: column;
  min-height: 240px;
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 56px;
}

.footer-col h4 {
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--text-3);
  margin-bottom: 22px;
}

.footer-col a {
  display: block;
  font-size: 13px;
  color: var(--text-2);
  margin-bottom: 12px;
  transition: color 0.2s ease;
}

.footer-col a:hover {
  color: var(--text);
}

.footer-social {
  margin-top: auto;
  align-self: flex-end;
  display: flex;
  gap: 28px;
}

.footer-social a {
  font-size: 12px;
  color: var(--text-3);
  transition: color 0.2s ease;
}

.footer-social a:hover {
  color: var(--text);
}

/* ============================================================
   Entrance animation — content hidden until .revealed
   ============================================================ */

.navbar,
.hero-grid,
.scroll-indicator {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.navbar.revealed {
  opacity: 1;
  transform: none;
  transition-delay: 0.3s;
}

.hero-grid.revealed {
  opacity: 1;
  transform: none;
  transition-delay: 0.5s;
}

.scroll-indicator.revealed {
  opacity: 1;
  transform: none;
  transition-delay: 0.9s;
}

.how,
.footer {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.how.revealed,
.footer.revealed {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .navbar,
  .hero-grid,
  .scroll-indicator,
  .how,
  .footer {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
    transition-delay: 0s !important;
  }
}

@media (max-width: 1200px) {
  .container {
    width: calc(100% - 96px);
  }
}

@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 25px;
    align-items: start;
  }

  .hero-support {
    display: none;
  }

  .hero-left h1 {
    font-size: clamp(38px, 4.5vw, 52px);
  }

  .cards {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  .card {
    min-height: 280px;
    padding: 22px;
  }

  .how {
    padding: 120px 0 110px;
  }

  .footer-grid {
    gap: 48px;
  }
}

@media (max-width: 768px) {
  .container {
    width: calc(100% - 36px);
  }

  .nav {
    height: 64px;
    justify-content: space-between;
    padding-inline: 15px;
  }

  .nav-links {
    position: static;
    transform: none;
    flex-direction: column;
    align-items: flex-end;
    gap: 4px;
  }

  .nav-link {
    padding: 2px 0;
  }

  .nav-logo svg {
    width: 207px;
    height: auto;
  }

  .hero {
    padding-bottom: 40px;
  }

  .hero-left h1 {
    font-size: clamp(36px, 8vw, 46px);
  }

  .scroll-indicator {
    display: none;
  }

  .cards {
    gap: 14px;
  }

  .card {
    min-height: 260px;
  }

  .how {
    padding: 100px 0 90px;
  }

  .footer {
    padding: 80px 0 64px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 56px;
  }

  .footer-left,
  .footer-right {
    min-height: 0;
  }

  .footer-made {
    margin-top: 44px;
  }

  .footer-cols {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }

  .footer-social {
    margin-top: 48px;
    align-self: flex-start;
  }
}

@media (max-width: 480px) {
  .container {
    width: calc(100% - 24px);
  }

  .corner {
    width: 12px;
    height: 12px;
  }

  .corner-tl {
    top: 12px;
    left: 12px;
  }

  .corner-tr {
    top: 12px;
    right: 12px;
  }

  .corner-bl {
    bottom: 12px;
    left: 12px;
  }

  .corner-br {
    bottom: 12px;
    right: 12px;
  }

  .nav-link {
    font-size: 10px;
    letter-spacing: 0.1em;
    padding: 2px 0;
  }

  .nav-logo svg {
    width: min(184px, 50vw);
    height: auto;
  }

  .hero {
    padding-bottom: 40px;
  }

  .hero-left h1 {
    font-size: clamp(32px, 9vw, 40px);
  }

  .hero-desc {
    font-size: 13.5px;
  }

  .command-box {
    padding-left: 14px;
  }

  .cards {
    grid-template-columns: 1fr;
  }

  .card {
    min-height: 240px;
  }

  .how h2 {
    font-size: 32px;
  }

  .how-desc {
    font-size: 14px;
  }

  .footer-cols {
    grid-template-columns: 1fr;
    gap: 44px;
  }
}

/* ============================================================
   Error pages (404 / 500)
   ============================================================ */

.error-page {
  align-content: center;
  padding-bottom: 0;
}

.error-content {
  position: relative;
  z-index: 1;
  text-align: center;
}

.error-code {
  font-family: var(--mono);
  font-size: clamp(64px, 12vw, 140px);
  line-height: 1;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
}

.error-title {
  margin-top: 20px;
  font-size: clamp(20px, 3vw, 30px);
  font-weight: 400;
  letter-spacing: -0.01em;
  color: var(--text);
}

.error-desc {
  margin-top: 14px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-2);
}

.error-link {
  display: inline-block;
  margin-top: 36px;
  padding: 12px 28px;
  border: 1px solid var(--border);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-2);
  transition:
    border-color 0.2s ease,
    color 0.2s ease,
    transform 0.25s ease;
}

.error-link:hover {
  border-color: var(--text-3);
  color: var(--text);
  transform: translateY(-1px);
}