/* Bright Learning Studio: one page, no outside fonts or files. */

:root {
  --bg: #fff8ec;
  --surface: #ffffff;
  --text: #1f2a3a;
  --muted: #55627a;
  --brand: #1f3a5f;
  --sun: #ffc83d;
  --coral: #ff7a59;
  --teal: #2bb3a3;
  --border: #f0e2c8;
  --button-bg: #1f3a5f;
  --button-text: #ffffff;
  --link: #1f5fa8;
  --shadow: 0 6px 24px rgba(31, 42, 58, 0.08);
  --dot-sun: rgba(255, 200, 61, 0.28);
  --dot-teal: rgba(43, 179, 163, 0.18);
  --dot-coral: rgba(255, 122, 89, 0.16);
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14243a;
    --surface: #1d3150;
    --text: #f6efe2;
    --muted: #bac6d8;
    --brand: #f6efe2;
    --border: #2c4467;
    --button-bg: #ffc83d;
    --button-text: #14243a;
    --link: #ffd76b;
    --shadow: 0 6px 24px rgba(0, 0, 0, 0.3);
    --dot-sun: rgba(255, 200, 61, 0.10);
    --dot-teal: rgba(43, 179, 163, 0.10);
    --dot-coral: rgba(255, 122, 89, 0.08);
    color-scheme: dark;
  }
}

/* Language: show only the chosen one. (Without JavaScript, both show.) */
[data-lang="en"] [lang="es"],
[data-lang="es"] [lang="en"] { display: none !important; }
html:not([data-lang]) .lang-switch { display: none; }
html:not([data-lang]) [lang="es"] { font-style: italic; }

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

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 1.0625rem;
  line-height: 1.6;
  color: var(--text);
  background-color: var(--bg);
  background-image:
    radial-gradient(circle at 8% 80px, var(--dot-sun) 0 120px, transparent 121px),
    radial-gradient(circle at 100% 260px, var(--dot-teal) 0 90px, transparent 91px),
    radial-gradient(circle at 0% 100%, var(--dot-coral) 0 140px, transparent 141px);
  background-repeat: no-repeat;
  overflow-wrap: break-word;
}

a { color: var(--link); }

.site-header,
main,
.site-footer {
  width: 100%;
  max-width: 920px;
  margin: 0 auto;
  padding-left: 16px;
  padding-right: 16px;
}

/* Header */
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 20px;
  padding-bottom: 8px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.15rem;
  color: var(--brand);
  letter-spacing: -0.01em;
}

.lang-switch {
  display: inline-flex;
  padding: 3px;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--border);
}

.lang-switch button {
  font: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  border: 0;
  border-radius: 999px;
  padding: 6px 14px;
  min-height: 36px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
}

.lang-switch button[aria-pressed="true"] {
  background: var(--button-bg);
  color: var(--button-text);
}

/* Hero */
main { flex: 1; }

.hero {
  padding: 40px 0 24px;
  text-align: center;
}

.badge {
  display: inline-block;
  margin: 0 0 18px;
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--sun);
  color: #3a2a00;
  font-weight: 700;
  font-size: 0.9rem;
}

h1 {
  margin: 0 auto 16px;
  max-width: 16em;
  font-size: clamp(2rem, 7vw, 3.25rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
  text-wrap: balance;
  color: var(--brand);
}

h1 span { display: block; }

.lead {
  margin: 0 auto;
  max-width: 36em;
  font-size: 1.15rem;
  color: var(--muted);
}

/* Three small cards */
.features {
  list-style: none;
  margin: 24px 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

.features li {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 20px;
  box-shadow: var(--shadow);
}

.features li:nth-child(1) { border-top: 6px solid var(--sun); }
.features li:nth-child(2) { border-top: 6px solid var(--coral); }
.features li:nth-child(3) { border-top: 6px solid var(--teal); }

.icon { font-size: 1.75rem; line-height: 1; }

.features h2 {
  margin: 10px 0 4px;
  font-size: 1.15rem;
}

.features p { margin: 0; color: var(--muted); }

/* Beta testing */
.beta {
  margin: 32px 0 40px;
  padding: 28px 20px;
  text-align: center;
  background: var(--surface);
  border: 2px dashed var(--teal);
  border-radius: 24px;
  box-shadow: var(--shadow);
}

.beta h2 {
  margin: 0 0 8px;
  font-size: 1.6rem;
  line-height: 1.2;
  color: var(--brand);
}

.beta p { margin: 0 auto 12px; max-width: 34em; }

.actions { margin-top: 20px !important; }

.button {
  display: inline-block;
  padding: 14px 28px;
  border-radius: 999px;
  background: var(--button-bg);
  color: var(--button-text);
  font-weight: 700;
  font-size: 1.1rem;
  text-decoration: none;
  box-shadow: var(--shadow);
}

.button:hover { filter: brightness(1.1); }

html:not([data-lang]) .button { margin: 4px; }

.small { font-size: 0.95rem; color: var(--muted); }

/* Footer */
.site-footer {
  padding-top: 16px;
  padding-bottom: 28px;
  text-align: center;
  font-size: 0.9rem;
  color: var(--muted);
  border-top: 1px solid var(--border);
}

.site-footer p { margin: 4px 0; }

:focus-visible {
  outline: 3px solid var(--coral);
  outline-offset: 3px;
}

@media (max-width: 480px) {
  .site-header { justify-content: center; }
  .hero { padding-top: 28px; }
}