/* POO en Python — marca aurora-ui (violeta + teal, Space Grotesk / DM Sans / JetBrains Mono). */
:root {
  --font-display: 'Space Grotesk', system-ui, sans-serif;
  --font-body: 'DM Sans', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, 'SF Mono', monospace;
  --ds-primary: oklch(0.49 0.29 293);
  --ds-secondary: oklch(0.51 0.23 282);
  --ds-accent: oklch(0.82 0.16 181);
  --ds-highlight: oklch(0.82 0.12 298);
  --background: oklch(0.985 0.004 286);
  --foreground: oklch(0.22 0.035 269);
  --card: oklch(1 0 0);
  --muted: oklch(0.965 0.008 286);
  --muted-foreground: oklch(0.52 0.025 270);
  --border: oklch(0.91 0.01 286);
  --panel: oklch(0.21 0.05 285);
  --panel-foreground: oklch(0.96 0.01 286);
  --code-kw: oklch(0.82 0.16 181);
  --code-str: oklch(0.82 0.12 150);
  --code-com: oklch(0.6 0.03 286);
  --code-fn: oklch(0.82 0.12 298);
  --shadow-card: 0 2px 14px color-mix(in oklab, var(--foreground) 7%, transparent);
  --shadow-glow: 0 14px 44px color-mix(in oklab, var(--ds-primary) 26%, transparent);
  --radius: 1rem;
  --maxw: 70rem;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme='light']) {
    --background: oklch(0.17 0.02 277);
    --foreground: oklch(0.96 0.005 286);
    --card: oklch(0.21 0.025 277);
    --muted: oklch(0.24 0.025 277);
    --muted-foreground: oklch(0.72 0.02 286);
    --border: oklch(0.31 0.03 277);
  }
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; font-family: var(--font-body); background: var(--background); color: var(--foreground);
  line-height: 1.7; -webkit-font-smoothing: antialiased;
}
.container { width: 100%; max-width: var(--maxw); margin-inline: auto; padding-inline: 1.25rem; }
a { color: var(--ds-primary); }
h1, h2, h3 { font-family: var(--font-display); letter-spacing: -0.02em; line-height: 1.15; }
code, pre { font-family: var(--font-mono); }
.eyebrow { font-family: var(--font-display); font-weight: 600; text-transform: uppercase; letter-spacing: 0.08em; font-size: 0.8rem; color: var(--ds-primary); }
.pill { display: inline-block; padding: 0.3rem 0.8rem; border-radius: 999px; background: color-mix(in oklab, var(--ds-accent) 22%, transparent); color: color-mix(in oklab, var(--foreground) 85%, var(--ds-primary)); font-size: 0.8rem; font-weight: 600; }

/* Header */
.hdr { position: sticky; top: 0; z-index: 20; backdrop-filter: blur(10px); background: color-mix(in oklab, var(--background) 82%, transparent); border-bottom: 1px solid var(--border); }
.hdr__in { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding-block: 0.8rem; }
.brand { font-family: var(--font-display); font-weight: 700; font-size: 1.25rem; text-decoration: none; background: linear-gradient(120deg, var(--ds-primary), var(--ds-accent)); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.nav { display: flex; gap: 1.2rem; align-items: center; }
.nav a { text-decoration: none; color: var(--muted-foreground); font-weight: 500; font-size: 0.95rem; }
.nav a:hover { color: var(--foreground); }
@media (max-width: 44rem) { .nav a:not(.btn) { display: none; } }

/* Hero */
.hero { padding-block: clamp(3rem, 8vw, 6rem); position: relative; overflow: hidden; }
.hero::after { content: ''; position: absolute; inset: -40% 40% auto -20%; height: 60vh; background: radial-gradient(closest-side, color-mix(in oklab, var(--ds-primary) 26%, transparent), transparent); filter: blur(10px); z-index: -1; }
.hero h1 { font-size: clamp(2.3rem, 6vw, 4rem); margin: 0.6rem 0 1rem; }
.hero .grad { background: linear-gradient(120deg, var(--ds-primary), var(--ds-accent)); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.hero p.lead { font-size: 1.2rem; color: var(--muted-foreground); max-width: 40rem; }
.cta-row { display: flex; gap: 0.8rem; flex-wrap: wrap; margin-top: 1.8rem; }
.btn { display: inline-flex; align-items: center; gap: 0.5rem; padding: 0.7rem 1.3rem; border-radius: 0.8rem; font-weight: 600; text-decoration: none; font-family: var(--font-display); border: 1px solid transparent; cursor: pointer; }
.btn--primary { background: linear-gradient(120deg, var(--ds-primary), var(--ds-secondary)); color: #fff; box-shadow: var(--shadow-glow); }
.btn--ghost { border-color: var(--border); color: var(--foreground); background: var(--card); }

/* Sections */
section { padding-block: clamp(2.5rem, 6vw, 4.5rem); }
.section-head { max-width: 42rem; margin-bottom: 2rem; }
.section-head h2 { font-size: clamp(1.7rem, 4vw, 2.4rem); margin: 0.4rem 0 0.6rem; }
.section-head p { color: var(--muted-foreground); margin: 0; }
.grid { display: grid; gap: 1.2rem; }
.grid--2 { grid-template-columns: repeat(auto-fit, minmax(20rem, 1fr)); }
.card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.5rem; box-shadow: var(--shadow-card); }
.card h3 { margin: 0 0 0.3rem; font-size: 1.25rem; }
.card .num { font-family: var(--font-mono); color: var(--ds-accent); font-weight: 700; font-size: 0.9rem; }
.card p { color: var(--muted-foreground); margin: 0.3rem 0 0.9rem; }

/* Code */
pre { background: var(--panel); color: var(--panel-foreground); border-radius: 0.9rem; padding: 1.1rem 1.2rem; overflow-x: auto; font-size: 0.9rem; line-height: 1.6; margin: 0; border: 1px solid color-mix(in oklab, var(--ds-primary) 30%, transparent); }
pre code { color: inherit; }
.k { color: var(--code-kw); } .s { color: var(--code-str); } .c { color: var(--code-com); font-style: italic; } .f { color: var(--code-fn); } .n { color: var(--ds-highlight); }
p code, li code { background: var(--muted); border: 1px solid var(--border); border-radius: 0.4rem; padding: 0.08rem 0.35rem; font-size: 0.88em; }

/* Cheat table */
.cheat { width: 100%; border-collapse: collapse; font-size: 0.95rem; }
.cheat th, .cheat td { text-align: left; padding: 0.6rem 0.8rem; border-bottom: 1px solid var(--border); vertical-align: top; }
.cheat th { font-family: var(--font-display); color: var(--muted-foreground); }
.cheat td code { white-space: nowrap; }

/* Footer */
.ftr { border-top: 1px solid var(--border); background: var(--muted); padding-block: 2.5rem; margin-top: 2rem; }
.ftr p { margin: 0.2rem 0; color: var(--muted-foreground); font-size: 0.9rem; }
.skip { position: absolute; left: -999px; }
.skip:focus { left: 1rem; top: 1rem; background: var(--card); padding: 0.5rem 1rem; border-radius: 0.5rem; z-index: 50; }