/* ============================================================
   Lekha landing site - all styling.
   Brand: navy #171e30, purple #6e5ef0. System fonts, no deps.
   ============================================================ */

:root {
  --navy: #171e30;
  --navy-deep: #0f1422;
  --purple: #6e5ef0;
  --purple-hover: #5a4ad6;
  --rail-teal: #0d9488;
  --rail-amber: #d9730d;

  --bg: #ffffff;
  --bg-soft: #f7f6f2;
  --ink: #1f2330;
  --ink-soft: #4a4f5e;
  --muted: #6b7280;
  --border: rgba(20, 24, 40, 0.1);
  --card: #ffffff;
  --shadow: 0 18px 50px rgba(20, 24, 40, 0.14);

  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, 'SF Mono', Menlo, Consolas, monospace;
  --maxw: 980px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #11141b;
    --bg-soft: #161a23;
    --ink: #e9eaee;
    --ink-soft: #b9bdc9;
    --muted: #8b91a0;
    --border: rgba(255, 255, 255, 0.1);
    --card: #181c25;
    --shadow: 0 18px 50px rgba(0, 0, 0, 0.5);
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1,
h2,
h3 {
  line-height: 1.2;
  letter-spacing: -0.01em;
}

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

code {
  font-family: var(--mono);
  font-size: 0.92em;
}

/* ===================== Hero ===================== */
.hero {
  background: var(--navy);
  color: #fff;
  text-align: center;
  padding: 88px 24px 72px;
  background-image: radial-gradient(
    120% 90% at 50% -10%,
    rgba(110, 94, 240, 0.28),
    transparent 60%
  );
}
.hero__inner {
  max-width: 720px;
  margin: 0 auto;
}
.hero__icon {
  width: 104px;
  height: 104px;
  border-radius: 24px;
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.45);
}
.hero__wordmark {
  margin: 22px 0 0;
  font-size: 52px;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.hero__tagline {
  margin: 12px auto 0;
  max-width: 30ch;
  font-size: 19px;
  color: #c4c9da;
}
.hero__actions {
  margin-top: 30px;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
  align-items: center;
}
.hero__github {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin-top: 22px;
  color: #aab0c4;
  font-size: 15px;
}
.hero__github:hover {
  color: #fff;
  text-decoration: none;
}

/* ===================== Buttons / chips ===================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-size: 16px;
  font-weight: 600;
  padding: 13px 22px;
  border-radius: 12px;
  border: 1px solid transparent;
  cursor: pointer;
}
.btn--primary {
  background: var(--purple);
  color: #fff;
  box-shadow: 0 8px 24px rgba(110, 94, 240, 0.45);
}
.btn--primary:hover {
  background: var(--purple-hover);
  text-decoration: none;
}

.copy-chip {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.05);
  color: #e6e9f2;
  cursor: pointer;
  font-family: var(--mono);
  font-size: 14px;
  transition:
    border-color 0.15s,
    background 0.15s;
}
.copy-chip:hover {
  border-color: rgba(255, 255, 255, 0.35);
  background: rgba(255, 255, 255, 0.1);
}
.copy-chip code {
  color: inherit;
}
.copy-chip__icon {
  display: inline-flex;
  opacity: 0.7;
}
.copy-chip.is-copied {
  border-color: var(--rail-teal);
}

/* ===================== Window frame ===================== */
/* Each screenshot already includes the app's own title row (with macOS traffic
   lights baked in at capture time), so the frame is just a rounded, shadowed
   card around the image - no separate chrome bar. */
.window {
  margin: 0;
  border-radius: 12px;
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}
@media (prefers-color-scheme: dark) {
  .window {
    background: #0e0e10;
  }
}
.window img {
  display: block;
  width: 100%;
  height: auto;
}

/* ===================== Primary shot ===================== */
.primary-shot {
  max-width: 1080px;
  margin: -44px auto 0;
  padding: 0 24px;
  position: relative;
  z-index: 2;
}

/* ===================== Feature rows ===================== */
.features {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 96px 24px 24px;
  display: flex;
  flex-direction: column;
  gap: 96px;
}
.feature {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
}
.feature--reverse .feature__media {
  order: 2;
}
.feature__text h2 {
  font-size: 28px;
  margin: 0 0 12px;
}
.feature__text p {
  margin: 0;
  font-size: 17px;
  color: var(--ink-soft);
}
.feature__text code {
  background: var(--bg-soft);
  padding: 1px 6px;
  border-radius: 5px;
}

/* Stack the two windows full media-width and crop each to its top, where the
   color rail lives. The in-app rail is only a few px tall and vanishes at
   thumbnail size, so we extend it into a bold colored top edge on the frame -
   teal for one window, amber for the other - making the "tint each window"
   idea read at a glance. */
.window-color-pair {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
.window-color-pair .window {
  border-top-width: 6px;
  border-top-style: solid;
}
.window-color-pair .window img {
  height: 200px;
  object-fit: cover;
  object-position: top center;
}
.window-color-pair .window:nth-child(1) {
  border-top-color: var(--rail-teal);
}
.window-color-pair .window:nth-child(2) {
  border-top-color: var(--rail-amber);
}

/* ===================== Themes showcase ===================== */
.themes {
  padding: 88px 24px 96px;
}
.themes__head {
  max-width: 620px;
  margin: 0 auto 8px;
  text-align: center;
}
.themes__head h2 {
  font-size: 28px;
  margin: 0 0 10px;
}
.themes__head p {
  margin: 0;
  font-size: 17px;
  color: var(--ink-soft);
}

/* Diagonal fan of the nine theme tiles (each a cropped top-left corner of the
   app). Each tile is offset down and to the right, so the title row + sidebar of
   the ones behind - where the palette reads - peek out, and the front tile shows
   in full. Offsets are percentages of the stack width, so the fan scales
   fluidly, and the whole set is far shorter than a straight vertical stack. */
.theme-stack {
  position: relative;
  max-width: 880px;
  margin: 48px auto 0;
}
.theme-card {
  width: 58%;
  margin-top: -14.2%;
  margin-left: calc(var(--i) * 4.6%);
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: 0 16px 36px rgba(20, 24, 40, 0.24);
}
.theme-card:first-child {
  margin-top: 0;
}
.theme-card img {
  display: block;
  width: 100%;
  height: auto;
}
@media (prefers-color-scheme: dark) {
  .theme-card {
    box-shadow: 0 16px 36px rgba(0, 0, 0, 0.6);
  }
}
/* Narrower screens: wider tiles, gentler horizontal drift so the fan still fits
   and stays legible. */
@media (max-width: 700px) {
  .theme-card {
    width: 76%;
    margin-top: -18%;
    margin-left: calc(var(--i) * 3%);
  }
}

/* ===================== More features ===================== */
.more {
  background: var(--bg-soft);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  margin-top: 64px;
  padding: 72px 24px;
}
.more__title {
  text-align: center;
  font-size: 26px;
  margin: 0 0 40px;
}
.more__grid {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px 36px;
}
.more__grid li {
  margin: 0;
}
.more__icon {
  display: inline-flex;
  width: 38px;
  height: 38px;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  background: rgba(110, 94, 240, 0.12);
  color: var(--purple);
  margin-bottom: 12px;
}
.more__icon svg {
  width: 20px;
  height: 20px;
}
.more__grid h3 {
  font-size: 17px;
  margin: 0 0 5px;
}
.more__grid p {
  margin: 0;
  font-size: 15px;
  color: var(--muted);
}
.more__grid code {
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 1px 5px;
  border-radius: 5px;
}

/* ===================== Install ===================== */
.install {
  max-width: 680px;
  margin: 0 auto;
  padding: 80px 24px;
  text-align: center;
}
.install h2 {
  font-size: 28px;
  margin: 0 0 8px;
}
.install__lead {
  color: var(--muted);
  margin: 0 0 18px;
}
.codeblock {
  position: relative;
  text-align: left;
  background: var(--navy);
  color: #e6e9f2;
  border-radius: 12px;
  padding: 18px 52px 18px 20px;
  box-shadow: var(--shadow);
}
.codeblock pre {
  margin: 0;
  overflow-x: auto;
}
.codeblock code {
  font-family: var(--mono);
  font-size: 14.5px;
  line-height: 1.7;
  color: #e6e9f2;
}
.codeblock__copy {
  position: absolute;
  top: 12px;
  right: 12px;
  display: inline-flex;
  padding: 7px;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(255, 255, 255, 0.06);
  color: #cfd3e0;
  cursor: pointer;
}
.codeblock__copy:hover {
  background: rgba(255, 255, 255, 0.14);
}
.codeblock.is-copied .codeblock__copy {
  border-color: var(--rail-teal);
  color: #fff;
}
.install__or {
  margin: 22px 0 0;
  font-size: 16px;
}
.install__note {
  margin: 14px auto 0;
  max-width: 52ch;
  font-size: 14px;
  color: var(--muted);
}
.callout {
  margin: 26px auto 0;
  max-width: 560px;
  text-align: left;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px 22px;
}
.callout__title {
  margin: 0 0 8px;
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
}
.callout__body {
  margin: 0 0 14px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink-soft);
}
.callout__body strong {
  color: var(--ink);
}
.callout__body--tight {
  margin-bottom: 8px;
}
.codeblock--sm {
  padding: 12px 46px 12px 16px;
  box-shadow: none;
}
.codeblock--sm code {
  font-size: 13px;
  line-height: 1.5;
}
.install__shots {
  width: min(880px, 94vw);
  margin: 30px auto 0;
  margin-left: 50%;
  transform: translateX(-50%);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  align-items: start;
}
.shot {
  margin: 0;
}
.shot img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 12px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}
.shot figcaption {
  margin-top: 11px;
  font-size: 13.5px;
  color: var(--ink-soft);
}
@media (max-width: 620px) {
  .install__shots {
    width: 100%;
    margin-left: 0;
    transform: none;
    grid-template-columns: 1fr;
    gap: 24px;
  }
}

/* ===================== Footer ===================== */
.footer {
  background: var(--navy-deep);
  color: #aab0c4;
  padding: 44px 24px;
}
.footer__inner {
  max-width: var(--maxw);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 24px;
}
.footer__brand {
  font-weight: 700;
  color: #fff;
  margin: 0;
}
.footer__links {
  display: flex;
  gap: 20px;
}
.footer__links a {
  color: #c4c9da;
}
.footer__links a:hover {
  color: #fff;
}
.footer__license {
  margin: 0;
  margin-left: auto;
  font-size: 14px;
}

/* ===================== Responsive ===================== */
@media (max-width: 760px) {
  .hero {
    padding: 64px 20px 56px;
  }
  .hero__wordmark {
    font-size: 42px;
  }
  .hero__tagline {
    font-size: 17px;
  }
  .primary-shot {
    margin-top: -28px;
  }
  .features {
    padding-top: 64px;
    gap: 64px;
  }
  .feature {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .feature--reverse .feature__media {
    order: 0;
  }
  .feature__text {
    text-align: center;
  }
  .more__grid {
    grid-template-columns: 1fr;
    gap: 24px;
    max-width: 340px;
  }
  .footer__inner {
    flex-direction: column;
    text-align: center;
  }
  .footer__license {
    margin-left: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}