/* =========================================================
   CSS Development Lab 17
   Container Queries
   ========================================================= */

:root {
  --page-max: 1200px;
  --text: #171717;
  --muted: #686868;
  --line: #e5e5df;
  --surface: #ffffff;
  --soft: #f5f5f1;
  --dark: #171717;
  --radius: 20px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background: var(--surface);
  font-family: Inter, "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  line-height: 1.65;
}

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

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

.page-wrap {
  width: min(calc(100% - 40px), var(--page-max));
  margin-inline: auto;
}

.eyebrow {
  margin: 0 0 14px;
  color: #858585;
  font-size: .78rem;
  font-weight: 800;
  letter-spacing: .15em;
}

.intro {
  padding: clamp(72px, 10vw, 130px) 0 clamp(58px, 8vw, 90px);
  background:
    radial-gradient(circle at 86% 14%, rgba(0,0,0,.05), transparent 27%),
    linear-gradient(180deg, #fafaf8 0%, #f3f3ef 100%);
}

.intro-inner {
  max-width: 1000px;
}

.intro h1,
.section-head h2,
.compare-copy h2,
.code-grid h2,
.use-head h2 {
  margin: 0;
  line-height: 1.04;
  letter-spacing: -.045em;
}

.intro h1 {
  font-size: clamp(2.8rem, 7vw, 6rem);
}

.intro-desc {
  max-width: 840px;
  margin: 24px 0 0;
  color: var(--muted);
  font-size: clamp(1rem, 1.7vw, 1.18rem);
}

/* ---------- Demo ---------- */

.lab {
  padding: clamp(80px, 10vw, 130px) 0;
}

.section-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, .78fr);
  align-items: end;
  gap: clamp(28px, 6vw, 80px);
}

.section-head h2,
.compare-copy h2,
.code-grid h2,
.use-head h2 {
  font-size: clamp(2rem, 4.5vw, 4.5rem);
}

.section-head > p,
.compare-copy > p {
  margin: 0;
  color: var(--muted);
}

.container-demo {
  margin-top: 20px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: #fafaf8;
}

.wide-demo {
  margin-top: 44px;
}

.container-label {
  margin: 0 0 14px;
  color: #888;
  font-size: .76rem;
  font-weight: 800;
  letter-spacing: .08em;
}

.middle-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.7fr) minmax(260px, .75fr);
  gap: 20px;
}

.card-container {
  container-type: inline-size;
}

/* ---------- Base card: narrow-first ---------- */

.product-card {
  min-width: 0;
  overflow: hidden;
  display: grid;
  grid-template-columns: 1fr;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}

.product-media {
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: #ddd;
}

.product-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.product-body {
  min-width: 0;
  padding: 22px;
}

.product-meta {
  margin: 0 0 9px;
  color: #888;
  font-size: .72rem;
  font-weight: 800;
  letter-spacing: .11em;
}

.product-body h3 {
  margin: 0;
  font-size: 1.35rem;
  line-height: 1.18;
  letter-spacing: -.025em;
}

.product-desc {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: .92rem;
}

.product-actions {
  margin-top: 20px;
  display: grid;
  gap: 8px;
}

.product-actions a {
  min-height: 42px;
  padding: 0 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: .86rem;
  font-weight: 740;
}

.product-actions .primary {
  border-color: var(--dark);
  color: #fff;
  background: var(--dark);
}

/* ---------- Medium container ---------- */

@container (min-width: 430px) {
  .product-body {
    padding: 24px;
  }

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

/* ---------- Wide container ---------- */

@container (min-width: 620px) {
  .product-card {
    grid-template-columns: minmax(220px, 38%) minmax(0, 1fr);
    align-items: stretch;
  }

  .product-media {
    height: 100%;
    aspect-ratio: auto;
  }

  .product-body {
    padding: clamp(26px, 4cqi, 42px);
    display: flex;
    flex-direction: column;
  }

  .product-body h3 {
    font-size: clamp(1.7rem, 4cqi, 2.8rem);
  }

  .product-actions {
    margin-top: auto;
    padding-top: 28px;
    display: flex;
    flex-wrap: wrap;
  }

  .product-actions a {
    min-width: 120px;
  }
}

/* ---------- Very wide container ---------- */

@container (min-width: 820px) {
  .product-card {
    grid-template-columns: minmax(300px, 42%) minmax(0, 1fr);
  }

  .product-body {
    padding: clamp(34px, 4cqi, 54px);
  }

  .product-desc {
    max-width: 58ch;
    font-size: 1rem;
  }
}

/* ---------- Compare ---------- */

.compare {
  padding: 0 0 clamp(90px, 11vw, 140px);
}

.compare-grid {
  padding: clamp(30px, 6vw, 64px);
  display: grid;
  grid-template-columns: minmax(0, .85fr) minmax(320px, 1.15fr);
  align-items: center;
  gap: clamp(36px, 7vw, 90px);
  border-radius: 28px;
  background: var(--soft);
}

.compare-copy > p {
  margin-top: 22px;
}

.decision-list {
  display: grid;
  gap: 12px;
}

.decision-list > div {
  padding: 18px 20px;
  display: grid;
  gap: 4px;
  border-radius: 14px;
  background: #fff;
}

.decision-list strong {
  font-size: .94rem;
}

.decision-list span {
  color: var(--muted);
  font-size: .88rem;
}

/* ---------- Code ---------- */

.code-section {
  padding: 0 0 clamp(90px, 11vw, 140px);
}

.code-grid {
  display: grid;
  grid-template-columns: minmax(0, .8fr) minmax(360px, 1.2fr);
  align-items: center;
  gap: clamp(36px, 7vw, 90px);
}

.code-card {
  min-width: 0;
  overflow-x: auto;
  border-radius: 18px;
  background: #181818;
}

.code-card pre {
  margin: 0;
  padding: clamp(22px, 4vw, 34px);
}

.code-card code {
  color: #f2f2f2;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: clamp(.82rem, 1.5vw, .96rem);
  line-height: 1.75;
}

/* ---------- Use cases ---------- */

.use-cases {
  padding: 0 0 clamp(90px, 12vw, 150px);
}

.use-head {
  max-width: 780px;
}

.use-grid {
  margin-top: 38px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.use-grid article {
  min-height: 220px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: 18px;
}

.use-grid span {
  color: #999;
  font-size: .78rem;
  font-weight: 800;
}

.use-grid h3 {
  margin: auto 0 8px;
  font-size: 1.15rem;
}

.use-grid p {
  margin: 0;
  color: var(--muted);
  font-size: .9rem;
}

/* ---------- Page responsive ---------- */

@media (max-width: 900px) {
  .section-head,
  .compare-grid,
  .code-grid {
    grid-template-columns: 1fr;
  }

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

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

@media (max-width: 680px) {
  .page-wrap {
    width: calc(100% - 28px);
  }

  .container-demo {
    padding: 12px;
  }

  .compare-grid {
    padding: 24px;
  }

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

  .use-grid article {
    min-height: 180px;
  }
}

:focus-visible {
  outline: 2px solid #171717;
  outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
  }
}