/* Learn Vector website: system fonts, no external resources. Light/dark via prefers-color-scheme. */
:root {
  --top: #1E6FD9;
  --mid: #11408F;
  --deep: #0A1F4D;
  --light-blue: #CFE4FF;
  --ccc: #9CCBFF;
  --orange: #E8622C;
  --brand-blue: #0A5BC4;
  --bg: #F2F2F7;
  --card: #FFFFFF;
  --ink: #0F1B2D;
  --ink-2: #4A5568;
  --line: #D9DEE7;
  --link: #0A5BC4;
  --focus: #E8622C;
  --orange-text: #B83A0E;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #000000;
    --card: #1C1C1E;
    --ink: #F2F4F8;
    --ink-2: #A9B3C1;
    --line: #2C2C2E;
    --link: #8CC0FF;
    --orange-text: #FF9A6B;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 1.0625rem;
  line-height: 1.55;
  color: var(--ink);
  background: var(--bg);
}
img, svg { max-width: 100%; height: auto; }
a { color: var(--link); text-underline-offset: 0.15em; }
a:focus-visible, button:focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; border-radius: 6px; }
h1, h2, h3 { line-height: 1.2; letter-spacing: -0.01em; }
h2 { font-size: clamp(1.5rem, 1.2rem + 1.2vw, 2rem); margin: 0 0 0.75rem; }
h3 { font-size: 1.125rem; margin: 0 0 0.35rem; }
p { margin: 0 0 1rem; }

.skip { position: absolute; left: -9999px; top: 0; }
.skip:focus { left: 1rem; top: 1rem; z-index: 10; background: var(--card); padding: 0.5rem 0.75rem; border-radius: 8px; }

.wrap { width: min(1080px, 100% - 2.5rem); margin-inline: auto; }

/* Header */
.site-header { background: var(--top); color: #fff; }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding-block: 0.9rem; }
.brand { display: inline-flex; align-items: center; gap: 0.6rem; color: #fff; text-decoration: none; font-weight: 800; font-size: 1.15rem; letter-spacing: -0.01em; }
.brand img { width: 32px; height: 32px; border-radius: 8px; }
.brand .learn { color: var(--light-blue); }
.brand .vector { color: #FFB089; }
.site-header nav a { color: #fff; text-decoration: none; margin-left: 1.1rem; font-weight: 600; font-size: 0.95rem; opacity: 0.92; }
.site-header nav a:hover { opacity: 1; text-decoration: underline; }

/* Hero */
.hero {
  color: #fff;
  background: linear-gradient(180deg, var(--top) 0%, var(--mid) 50%, var(--deep) 100%);
  padding-block: clamp(2.5rem, 6vw, 5rem);
  overflow: hidden;
}
.hero .wrap { display: grid; grid-template-columns: 1.05fr 1fr; gap: clamp(1.5rem, 4vw, 3.5rem); align-items: center; }
.hero h1 { font-size: clamp(2.1rem, 1.5rem + 3vw, 3.4rem); margin: 0.6rem 0 0.75rem; font-weight: 800; }
.hero .subline { font-size: 1.1rem; color: #fff; max-width: 34rem; }
.hero .legend { display: inline-flex; flex-wrap: wrap; gap: 0.4rem 1rem; font-size: 0.9rem; font-weight: 600; color: rgba(255, 255, 255, 0.9);
  background: rgba(10, 31, 77, 0.35); border: 1px solid rgba(255, 255, 255, 0.15); border-radius: 999px; padding: 0.35rem 0.9rem; margin: 0.25rem 0 1rem; }
.hero .legend .swatch { display: inline-block; width: 0.6rem; height: 0.6rem; border-radius: 50%; margin-right: 0.4rem; vertical-align: 0.05em; }
.swatch.ccc { background: var(--ccc); }
.swatch.csu { background: #FF8A4C; }
.hero .flows { color: rgba(255, 255, 255, 0.8); font-size: 0.95rem; }
.wordmark { font-weight: 800; font-size: 1.35rem; letter-spacing: -0.01em; display: inline-flex; align-items: center; gap: 0.6rem; }
.wordmark img { width: 48px; height: 48px; border-radius: 12px; box-shadow: 0 4px 14px rgba(0, 0, 0, 0.25); }
.wordmark .learn { color: var(--light-blue); }
.wordmark .vector { color: #FFB089; }
.cta { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 1.25rem; }
.button { display: inline-block; padding: 0.8rem 1.3rem; border-radius: 999px; font-weight: 700; text-decoration: none; }
.button.primary { background: #fff; color: var(--deep); }
.button.ghost { color: #fff; border: 1.5px solid rgba(255, 255, 255, 0.6); }
.map-wrap { position: relative; }
.map-wrap::before { content: ""; position: absolute; inset: 5% 0; background: radial-gradient(closest-side, rgba(90, 162, 255, 0.18), transparent); }
.ca-map { position: relative; display: block; width: 100%; max-width: 460px; margin-inline: auto; filter: drop-shadow(0 10px 18px rgba(0, 0, 0, 0.3)); }

/* Map animation (JS sets each dot's delay; off for reduced motion) */
.js .ca-map .dot { opacity: 0; transform-box: fill-box; transform-origin: center; animation: dot-in 0.45s ease-out forwards; }
.js .ca-map .office { opacity: 0; animation: fade-in 0.4s ease-out 1.1s forwards; }
@keyframes dot-in { 0% { opacity: 0; transform: scale(0.4); } 60% { opacity: 1; transform: scale(1.5); } 100% { opacity: 1; transform: scale(1); } }
@keyframes fade-in { to { opacity: 1; } }
@media (prefers-reduced-motion: reduce) {
  .js .ca-map .dot, .js .ca-map .office { opacity: 1; animation: none; }
}

/* Sections */
main section { padding-block: clamp(2.5rem, 5vw, 4rem); }
main section:nth-of-type(even) { background: var(--card); }
.lead { font-size: 1.15rem; color: var(--ink-2); max-width: 46rem; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1rem; margin-top: 1.5rem; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 18px; padding: 1.15rem 1.2rem; }
main section:nth-of-type(even) .card { background: var(--bg); }
.card p { margin: 0; color: var(--ink-2); font-size: 0.98rem; }
.card .tag { display: inline-block; font-size: 0.75rem; font-weight: 700; letter-spacing: 0.04em; text-transform: uppercase; color: var(--orange-text); margin-bottom: 0.35rem; }
.principles { list-style: none; padding: 0; margin: 1.25rem 0 0; display: grid; gap: 0.75rem; }
.principles li { padding-left: 1.6rem; position: relative; }
.principles li::before { content: ""; position: absolute; left: 0; top: 0.55em; width: 0.65rem; height: 0.65rem; border-radius: 50%; background: var(--orange); }
.beta { text-align: center; }
.beta .button.primary { background: var(--brand-blue); color: #fff; }
.note { color: var(--ink-2); font-size: 0.95rem; margin-top: 0.75rem; }
.siri { font-style: italic; }

/* Text pages */
.page { padding-block: clamp(2rem, 5vw, 3.5rem); }
.page .wrap { max-width: 760px; }
.page h1 { font-size: clamp(1.9rem, 1.5rem + 2vw, 2.6rem); margin: 0 0 0.5rem; }
.page h2 { font-size: 1.35rem; margin-top: 2rem; }
.page .meta { color: var(--ink-2); }
.faq dt { font-weight: 700; margin-top: 1.25rem; }
.faq dd { margin: 0.35rem 0 0; color: var(--ink-2); }

/* Footer */
.site-footer { background: var(--deep); color: rgba(255, 255, 255, 0.85); padding-block: 2rem; font-size: 0.95rem; }
.site-footer .wrap { display: flex; flex-wrap: wrap; gap: 1rem 2rem; justify-content: space-between; align-items: center; }
.site-footer a { color: #fff; margin-right: 1.1rem; }
.site-footer p { margin: 0; }

@media (max-width: 820px) {
  .hero .wrap { grid-template-columns: 1fr; }
  .hero .copy { text-align: center; }
  .hero .subline { margin-inline: auto; }
  .cta { justify-content: center; }
  .site-header nav a { margin-left: 0.8rem; }
}
@media (max-width: 480px) {
  .site-header nav { display: none; }
}