:root {
  --paper: #fbfcfe;
  --paper-strong: #ffffff;
  --ink: #111820;
  --ink-soft: #344152;
  --muted: #637083;
  --line: #dce5ee;
  --line-strong: #b8c7d8;
  --blue: #006adc;
  --blue-dark: #084f9d;
  --teal: #00a0a7;
  --green: #75a846;
  --solar: #e4a03c;
  --rose: #c95d70;
  --dark: #111820;
  --dark-2: #1b2530;
  --shadow: 0 22px 60px rgba(17, 24, 32, 0.14);
  --font-sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "SFMono-Regular", "SF Mono", Consolas, "Liberation Mono", Menlo, monospace;
  color-scheme: light;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    linear-gradient(180deg, rgba(0, 106, 220, 0.08), rgba(0, 160, 167, 0) 520px),
    var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  letter-spacing: 0;
  text-rendering: optimizeLegibility;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(17, 24, 32, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(17, 24, 32, 0.04) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.34), transparent 58%);
}

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

img {
  display: block;
  max-width: 100%;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  width: 100%;
  min-height: 76px;
  padding: 18px clamp(18px, 4vw, 56px);
  background: rgba(251, 252, 254, 0.82);
  border-bottom: 1px solid rgba(184, 199, 216, 0.48);
  backdrop-filter: blur(18px);
}

.brand,
.nav-cta,
.nav-links a,
.button,
.theme-controls button,
.icon-button {
  transition:
    color 180ms ease,
    background 180ms ease,
    border-color 180ms ease,
    transform 180ms ease,
    box-shadow 180ms ease;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-size: 18px;
  font-weight: 780;
}

.brand-mark {
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
  background: transparent;
  border: 0;
  border-radius: 8px;
}

.brand-mark img {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  object-fit: cover;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(14px, 3vw, 34px);
  color: var(--ink-soft);
  font-size: 14px;
  font-weight: 680;
}

.nav-links a:hover {
  color: var(--blue);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0 18px;
  color: var(--paper-strong);
  background: var(--ink);
  border: 1px solid var(--ink);
  border-radius: 8px;
  font-size: 14px;
  font-weight: 760;
  box-shadow: 0 10px 24px rgba(17, 24, 32, 0.16);
}

.nav-cta:hover,
.button.primary:hover {
  background: var(--blue-dark);
  border-color: var(--blue-dark);
  transform: translateY(-1px);
}

main {
  overflow: hidden;
  scroll-margin-top: 76px;
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(520px, 0.86fr) minmax(560px, 1.14fr);
  align-items: center;
  gap: 0;
  min-height: calc(100svh - 76px);
  padding: clamp(40px, 7vw, 92px) clamp(18px, 4vw, 56px) clamp(34px, 5vw, 70px);
  isolation: isolate;
}

.hero-copy {
  position: relative;
  z-index: 2;
  max-width: min(660px, 50vw);
  margin-right: clamp(-120px, -5vw, -64px);
  padding: clamp(26px, 2.8vw, 40px);
  background: linear-gradient(90deg, rgba(251, 252, 254, 0.34), rgba(251, 252, 254, 0.14));
  border: 1px solid rgba(184, 199, 216, 0.32);
  border-radius: 8px;
  box-shadow: 0 24px 70px rgba(17, 24, 32, 0.08);
  backdrop-filter: blur(8px) saturate(1.08);
}

.hero h1 {
  margin: 0;
  max-width: 790px;
  color: var(--ink);
  font-size: clamp(58px, 5.8vw, 104px);
  font-weight: 840;
  line-height: 0.9;
}

.hero-subtitle {
  max-width: 700px;
  margin: 14px 0 0;
  color: #7f8a9a;
  font-size: clamp(32px, 3.5vw, 58px);
  font-weight: 720;
  line-height: 1.02;
}

.hero-copy > p:not(.hero-subtitle) {
  max-width: 620px;
  margin: 28px 0 0;
  color: var(--ink-soft);
  font-size: clamp(18px, 2vw, 24px);
  font-weight: 520;
  line-height: 1.48;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 48px;
  padding: 0 20px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 780;
}

.button svg {
  width: 19px;
  height: 19px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2;
}

.button.primary {
  color: #fff;
  background: var(--blue);
  border: 1px solid var(--blue);
  box-shadow: 0 16px 34px rgba(0, 106, 220, 0.25);
}

.button.secondary {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid var(--line-strong);
}

.button.secondary:hover {
  border-color: var(--blue);
  color: var(--blue-dark);
  transform: translateY(-1px);
}

.hero-points {
  display: none;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  max-width: 720px;
  margin: 42px 0 0;
}

.hero-points div {
  padding: 18px;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(184, 199, 216, 0.72);
  border-radius: 8px;
}

.hero-points dt {
  margin: 0 0 8px;
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 780;
}

.hero-points dd {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  font-weight: 550;
  line-height: 1.45;
}

.hero-visual {
  position: relative;
  z-index: 1;
  top: auto;
  right: auto;
  bottom: auto;
  min-width: 0;
  width: min(72vw, 1120px);
  margin-left: clamp(-60px, -3.5vw, -32px);
}

.screen-shell {
  position: relative;
  overflow: hidden;
  height: auto;
  background: #111820;
  border: 1px solid rgba(17, 24, 32, 0.22);
  border-radius: 8px;
  box-shadow: 0 28px 90px rgba(17, 24, 32, 0.2);
}

.screen-shell::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  border: 1px solid rgba(255, 255, 255, 0.34);
  border-radius: inherit;
}

.screen-shell img {
  width: 100%;
  height: auto;
  object-fit: contain;
  object-position: left top;
}

.workflow-section,
.codex-section,
.format-section,
.themes-section,
.final-section {
  padding: clamp(70px, 8vw, 118px) clamp(18px, 4vw, 56px);
}

.workflow-section {
  background: var(--paper-strong);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(300px, 0.58fr);
  gap: clamp(20px, 5vw, 84px);
  align-items: end;
  max-width: 1240px;
  margin: 0 auto clamp(34px, 5vw, 62px);
}

.section-heading h2,
.codex-copy h2,
.format-copy h2,
.final-section h2 {
  margin: 0;
  color: var(--ink);
  font-size: clamp(36px, 5.6vw, 76px);
  font-weight: 830;
  line-height: 0.98;
}

.section-heading p,
.codex-copy p,
.format-copy p,
.final-section p {
  margin: 0;
  color: var(--ink-soft);
  font-size: clamp(17px, 1.7vw, 21px);
  font-weight: 520;
  line-height: 1.58;
}

.workflow-rail {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  max-width: 1240px;
  margin: 0 auto;
}

.workflow-rail article {
  position: relative;
  min-height: 255px;
  padding: 24px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.workflow-rail article::after {
  content: "";
  position: absolute;
  top: 44px;
  right: -18px;
  z-index: 2;
  width: 24px;
  height: 2px;
  background: var(--line-strong);
}

.workflow-rail article:last-child::after {
  display: none;
}

.step-icon {
  display: grid;
  width: 46px;
  height: 46px;
  place-items: center;
  margin-bottom: 52px;
  color: var(--blue);
  background: #eef6ff;
  border: 1px solid #c8def4;
  border-radius: 8px;
}

.step-icon svg,
.icon-button svg {
  width: 22px;
  height: 22px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2;
}

.workflow-rail h3 {
  margin: 0 0 12px;
  color: var(--ink);
  font-size: 22px;
  font-weight: 790;
  line-height: 1.1;
}

.workflow-rail p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  font-weight: 530;
  line-height: 1.55;
}

.codex-section {
  display: grid;
  grid-template-columns: minmax(280px, 0.76fr) minmax(420px, 1fr);
  gap: clamp(32px, 7vw, 92px);
  align-items: center;
  max-width: 1352px;
  margin: 0 auto;
}

.codex-copy p {
  max-width: 620px;
  margin-top: 24px;
}

.codex-copy code {
  padding: 0.1em 0.32em;
  color: var(--blue-dark);
  background: #eaf4ff;
  border: 1px solid #c8def4;
  border-radius: 6px;
  font-family: var(--font-mono);
  font-size: 0.86em;
  font-weight: 720;
}

.feature-list {
  display: grid;
  gap: 14px;
  margin: 34px 0 0;
  padding: 0;
  list-style: none;
}

.feature-list li {
  position: relative;
  padding-left: 30px;
  color: var(--ink-soft);
  font-size: 16px;
  font-weight: 590;
  line-height: 1.5;
}

.feature-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.48em;
  width: 10px;
  height: 10px;
  background: var(--teal);
  border-radius: 999px;
  box-shadow: 0 0 0 5px rgba(0, 160, 167, 0.12);
}

.demo-panel {
  overflow: hidden;
  background: var(--dark);
  border: 1px solid rgba(17, 24, 32, 0.16);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.demo-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 62px;
  padding: 0 18px 0 22px;
  color: #dce5ee;
  background: #1b2530;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 720;
}

.icon-button {
  display: inline-grid;
  width: 40px;
  height: 40px;
  place-items: center;
  color: #06293b;
  background: #75ddf0;
  border: 0;
  border-radius: 999px;
  cursor: pointer;
}

.icon-button:hover {
  transform: translateY(-1px);
  background: #9ceafa;
}

.demo-panel pre,
.format-code pre,
.theme-slide pre {
  margin: 0;
  white-space: pre-wrap;
}

.demo-panel > pre {
  padding: 28px;
  color: #dbe8f3;
  background: #111820;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  font-family: var(--font-mono);
  font-size: clamp(13px, 1.3vw, 16px);
  line-height: 1.62;
}

.codex-card {
  margin: 0;
  padding: 22px;
  background: #202a36;
}

.card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  color: #f3f6fb;
}

.card-head strong {
  font-size: 20px;
  font-weight: 800;
}

.card-head span {
  color: #b7c4d4;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 820;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.prompt-box,
.output-box {
  margin-top: 18px;
  padding: 18px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 560;
  line-height: 1.56;
}

.prompt-box {
  color: #f7fbff;
  background: #2e3948;
}

.output-box {
  min-height: 118px;
  color: #dce5ee;
  background: #0c1118;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.output-box strong {
  color: #fff;
}

.format-section {
  display: grid;
  grid-template-columns: minmax(320px, 0.92fr) minmax(280px, 0.72fr);
  gap: clamp(32px, 7vw, 92px);
  align-items: center;
  background: #f0f5f9;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.format-code {
  overflow: hidden;
  max-width: 760px;
  justify-self: end;
  width: 100%;
  color: #edf6ff;
  background: #121b24;
  border: 1px solid rgba(17, 24, 32, 0.2);
  border-radius: 8px;
  box-shadow: 0 20px 44px rgba(17, 24, 32, 0.15);
}

.format-code pre {
  padding: clamp(24px, 4vw, 42px);
  font-family: var(--font-mono);
  font-size: clamp(13px, 1.4vw, 17px);
  line-height: 1.62;
}

.format-copy {
  max-width: 640px;
}

.format-copy p {
  margin-top: 24px;
}

.format-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 30px;
}

.format-facts span {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 12px;
  color: var(--ink-soft);
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: 13px;
  font-weight: 740;
}

.themes-section {
  background: var(--paper-strong);
}

.theme-playground {
  display: grid;
  grid-template-columns: 270px minmax(0, 1fr);
  gap: clamp(18px, 3vw, 38px);
  max-width: 1160px;
  margin: 0 auto;
}

.theme-controls {
  display: grid;
  align-content: start;
  gap: 10px;
}

.theme-controls button {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 48px;
  padding: 0 14px;
  color: var(--theme-button-ink, var(--ink-soft));
  background: var(--theme-button-bg, #fff);
  border: 1px solid var(--theme-button-line, var(--line));
  border-radius: 8px;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.42);
  cursor: pointer;
  font: inherit;
  font-size: 15px;
  font-weight: 760;
  text-align: left;
}

.theme-controls button[aria-pressed="true"] {
  border-color: var(--theme-button-active, #2384ef);
  box-shadow:
    0 0 0 2px color-mix(in srgb, var(--theme-button-active, #2384ef) 28%, transparent),
    inset 0 1px 0 rgba(255, 255, 255, 0.42);
}

.theme-controls button[data-theme="studio"] {
  --theme-button-bg: linear-gradient(135deg, #ffffff 0 50%, #006adc 50%);
  --theme-button-ink: #084f9d;
  --theme-button-line: #9ec9f0;
  --theme-button-active: #0074ed;
}

.theme-controls button[data-theme="midnight"] {
  --theme-button-bg: linear-gradient(135deg, #111820 0 50%, #75ddf0 50%);
  --theme-button-ink: #f5f8fb;
  --theme-button-line: #2a3848;
  --theme-button-active: #75ddf0;
}

.theme-controls button[data-theme="chalk"] {
  --theme-button-bg: linear-gradient(135deg, #243126 0 50%, #d5e9cd 50%);
  --theme-button-ink: #f0f7e8;
  --theme-button-line: #7f9b79;
  --theme-button-active: #aad37c;
}

.theme-controls button[data-theme="solar"] {
  --theme-button-bg: linear-gradient(135deg, #fff4d7 0 50%, #e4a03c 50%);
  --theme-button-ink: #38230d;
  --theme-button-line: #e3b866;
  --theme-button-active: #e4a03c;
}

.theme-controls button[data-theme="atelier"] {
  --theme-button-bg: linear-gradient(135deg, #f7edf1 0 50%, #c95d70 50%);
  --theme-button-ink: #2d1820;
  --theme-button-line: #d99aaa;
  --theme-button-active: #c95d70;
}

.swatch {
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(255, 255, 255, 0.76);
  border-radius: 999px;
  box-shadow: 0 2px 8px rgba(17, 24, 32, 0.16);
}

.theme-slide {
  min-height: 420px;
  padding: clamp(28px, 5vw, 58px);
  background: var(--slide-bg, #ffffff);
  border: 1px solid var(--slide-line, var(--line));
  border-radius: 8px;
  box-shadow: 0 22px 48px rgba(17, 24, 32, 0.12);
  color: var(--slide-ink, var(--ink));
  transition:
    background 220ms ease,
    color 220ms ease,
    border-color 220ms ease;
}

.theme-slide .slide-label {
  display: inline-flex;
  color: var(--slide-accent, var(--blue));
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 840;
  text-transform: uppercase;
}

.theme-slide h3 {
  max-width: 760px;
  margin: 42px 0 22px;
  font-size: clamp(42px, 6vw, 82px);
  font-weight: 840;
  line-height: 0.96;
}

.theme-slide p {
  max-width: 760px;
  margin: 0;
  color: var(--slide-muted, var(--ink-soft));
  font-size: clamp(18px, 2vw, 24px);
  font-weight: 540;
  line-height: 1.48;
}

.theme-slide pre {
  max-width: 520px;
  margin-top: 34px;
  padding: 18px;
  color: var(--slide-code-ink, #ecf5ff);
  background: var(--slide-code-bg, #121b24);
  border-radius: 8px;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.55;
}

.theme-playground[data-theme-preview="midnight"] .theme-slide {
  --slide-bg: #101720;
  --slide-ink: #f5f8fb;
  --slide-muted: #b9c7d7;
  --slide-line: #2a3848;
  --slide-accent: #75ddf0;
  --slide-code-bg: #070b10;
  --slide-code-ink: #eaf7ff;
}

.theme-playground[data-theme-preview="chalk"] .theme-slide {
  --slide-bg: #243126;
  --slide-ink: #f0f7e8;
  --slide-muted: #cddfca;
  --slide-line: #4c634b;
  --slide-accent: #aad37c;
  --slide-code-bg: #172017;
  --slide-code-ink: #effae9;
}

.theme-playground[data-theme-preview="solar"] .theme-slide {
  --slide-bg: #fff4d7;
  --slide-ink: #38230d;
  --slide-muted: #74532a;
  --slide-line: #e7c98f;
  --slide-accent: #b96e12;
  --slide-code-bg: #3a2711;
  --slide-code-ink: #fff6df;
}

.theme-playground[data-theme-preview="atelier"] .theme-slide {
  --slide-bg: #f7edf1;
  --slide-ink: #2d1820;
  --slide-muted: #704958;
  --slide-line: #ddb8c5;
  --slide-accent: #c95d70;
  --slide-code-bg: #2d1820;
  --slide-code-ink: #ffeef3;
}

.final-section {
  text-align: center;
  background:
    linear-gradient(135deg, rgba(0, 106, 220, 0.12), rgba(0, 160, 167, 0.1)),
    #eef5fa;
  border-top: 1px solid var(--line);
}

.final-section h2,
.final-section p {
  max-width: 880px;
  margin-inline: auto;
}

.final-section p {
  margin-top: 22px;
}

.final-section .button {
  margin-top: 34px;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 76px;
  padding: 20px clamp(18px, 4vw, 56px);
  color: var(--muted);
  background: var(--paper-strong);
  border-top: 1px solid var(--line);
  font-size: 14px;
  font-weight: 650;
}

.site-footer .copyright {
  margin: 0;
  text-align: center;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}

@media (max-width: 1080px) {
  .codex-section,
  .format-section {
    grid-template-columns: 1fr;
  }

  .hero {
    display: grid;
    grid-template-columns: 1fr;
    gap: 32px;
    min-height: auto;
    padding-top: 52px;
  }

  .hero-copy,
  .codex-copy,
  .format-copy {
    max-width: 820px;
  }

  .hero-copy {
    margin-right: 0;
  }

  .hero-visual {
    position: relative;
    top: auto;
    right: auto;
    bottom: auto;
    width: 100%;
    max-width: 980px;
    margin: 0;
  }

  .screen-shell {
    height: auto;
  }

  .screen-shell img {
    height: auto;
    object-fit: contain;
  }

  .section-heading {
    grid-template-columns: 1fr;
    align-items: start;
  }

  .workflow-rail {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .workflow-rail article::after {
    display: none;
  }

  .format-code {
    justify-self: start;
  }
}

@media (max-width: 820px) {
  .site-header {
    min-height: 68px;
    padding-top: 14px;
    padding-bottom: 14px;
  }

  .nav-links {
    display: none;
  }

  .hero {
    padding-top: 28px;
    padding-bottom: 22px;
    gap: 18px;
  }

  .hero h1 {
    font-size: clamp(46px, 12vw, 64px);
    line-height: 0.9;
  }

  .hero-subtitle {
    margin-top: 10px;
    font-size: clamp(28px, 7.5vw, 40px);
    line-height: 1.06;
  }

  .hero-copy > p:not(.hero-subtitle) {
    margin-top: 16px;
    font-size: 17px;
    line-height: 1.42;
  }

  .hero-actions {
    margin-top: 22px;
  }

  .hero-points,
  .workflow-rail,
  .theme-playground {
    grid-template-columns: 1fr;
  }

  .hero-points {
    display: none;
  }

  .workflow-section,
  .codex-section,
  .format-section,
  .themes-section,
  .final-section {
    padding-block: 64px;
  }

  .workflow-rail article {
    min-height: 0;
  }

  .step-icon {
    margin-bottom: 34px;
  }

  .theme-slide {
    min-height: 360px;
  }
}

@media (max-width: 560px) {
  .site-header {
    gap: 14px;
    padding-inline: 16px;
  }

  .brand {
    font-size: 17px;
  }

  .nav-cta {
    min-height: 38px;
    padding-inline: 14px;
  }

  .hero {
    padding-inline: 16px;
  }

  .hero-copy > p:not(.hero-subtitle) {
    margin-top: 22px;
  }

  .hero-actions,
  .hero-actions .button,
  .final-section .button {
    width: 100%;
  }

  .hero-points div,
  .workflow-rail article,
  .codex-card,
  .prompt-box,
  .output-box,
  .theme-slide pre {
    padding: 16px;
  }

  .demo-panel > pre {
    padding: 20px;
  }

  .site-footer {
    align-items: center;
  }

  .site-footer .copyright {
    text-align: center;
  }
}