/* Europa Books — Landing
 * Design tokens espelham o app (bookshelf.app/lib/brand/europa/europa_brand.dart):
 *   primary   #2270B5  onPrimary #FFFFFF
 *   accent    #F4B740  accentStrong #7A5A00
 *   bg        #F3F5F8  surface #FFFFFF
 *   text      #16232E / #52657A
 *   raios     card 28 / pill 40
 *   tipografia Roboto (AppTypographyScale.fontFamily)
 */

:root {
  --primary: #2270B5;
  --primary-strong: #1A5A93;
  --primary-soft: #DCEAF7;
  --primary-soft-2: #EEF4FA;
  --on-primary: #FFFFFF;

  --accent: #F4B740;
  --accent-strong: #7A5A00;   /* variante AA para texto/ícone em superfície clara */
  --accent-soft: #FDF3DC;

  --fg: #16232E;              /* textPrimary */
  --fg-muted: #52657A;        /* textSecondary */
  --fg-subtle: #7C8CA0;
  --bg: #F3F5F8;              /* background */
  --surface: #FFFFFF;         /* surface */
  --surface-alt: #E9EEF4;
  --border: #DCE3EC;
  --border-strong: #C3CEDB;

  --radius-sm: 12px;
  --radius: 20px;
  --radius-lg: 28px;          /* radiusCard */
  --radius-pill: 40px;        /* radiusPill */
  --shadow-sm: 0 1px 2px rgba(22, 35, 46, 0.04), 0 1px 3px rgba(22, 35, 46, 0.06);
  --shadow: 0 8px 24px rgba(22, 35, 46, 0.08);
  --shadow-lg: 0 24px 60px -20px rgba(34, 112, 181, 0.35);

  --container: 1120px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --primary: #6FB2E8;
    --primary-strong: #A5CFF2;
    --primary-soft: #143B5C;
    --primary-soft-2: #10293F;
    --on-primary: #08192B;

    --accent: #F4B740;
    --accent-strong: #F4B740;  /* em fundo escuro o accent já passa em contraste */
    --accent-soft: #3A2C08;

    --fg: #EDF2F7;
    --fg-muted: #B4C2D0;
    --fg-subtle: #8496A8;
    --bg: #0D1720;
    --surface: #16232E;
    --surface-alt: #1B2B39;
    --border: #293947;
    --border-strong: #3A4C5D;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
    --shadow: 0 8px 24px rgba(0, 0, 0, 0.45);
    --shadow-lg: 0 24px 60px -20px rgba(34, 112, 181, 0.5);
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: 'Roboto', system-ui, -apple-system, 'Segoe UI', Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--fg);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, svg { max-width: 100%; }
img { height: auto; display: block; }

a {
  color: var(--primary);
  text-decoration: none;
  transition: color .15s ease;
}
a:hover { color: var(--primary-strong); }

/* Layout */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.section { padding: 80px 0; }
.section-tight { padding: 56px 0; }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: saturate(140%) blur(12px);
  -webkit-backdrop-filter: saturate(140%) blur(12px);
  border-bottom: 1px solid var(--border);
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  color: var(--fg);
  font-size: 16px;
  letter-spacing: -0.01em;
}
.brand img { width: 32px; height: 42px; border-radius: 6px; }
.brand small {
  display: block;
  font-weight: 600;
  font-size: 11px;
  color: var(--fg-subtle);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.nav {
  display: flex;
  align-items: center;
  gap: 28px;
}
.nav a {
  color: var(--fg-muted);
  font-weight: 600;
  font-size: 14px;
}
.nav a:hover { color: var(--fg); }

@media (max-width: 860px) {
  .nav { display: none; }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  font-weight: 700;
  font-size: 14px;
  font-family: inherit;
  cursor: pointer;
  transition: transform .12s ease, box-shadow .15s ease, background .15s ease, color .15s ease, border-color .15s ease;
  white-space: nowrap;
}
.btn-primary {
  background: var(--primary);
  color: var(--on-primary);
  box-shadow: var(--shadow);
}
.btn-primary:hover {
  background: var(--primary-strong);
  color: var(--on-primary);
  transform: translateY(-1px);
}
.btn-ghost {
  background: transparent;
  color: var(--fg);
  border-color: var(--border-strong);
}
.btn-ghost:hover { background: var(--surface-alt); color: var(--fg); }
.btn-lg { padding: 16px 28px; font-size: 15px; }
.btn[aria-disabled="true"] { opacity: .65; cursor: default; pointer-events: none; }

/* Hero */
.hero {
  position: relative;
  padding: 96px 0 80px;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(60% 60% at 82% 0%, color-mix(in srgb, var(--primary) 18%, transparent), transparent 62%),
    radial-gradient(42% 42% at 0% 18%, color-mix(in srgb, var(--accent) 22%, transparent), transparent 62%);
  pointer-events: none;
}
.hero__grid {
  position: relative;
  display: grid;
  grid-template-columns: 1.05fr .85fr;
  gap: 56px;
  align-items: center;
}
@media (max-width: 920px) {
  .hero { padding: 64px 0 56px; }
  .hero__grid { grid-template-columns: 1fr; gap: 40px; }
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: var(--primary-soft);
  color: var(--primary-strong);
  border-radius: var(--radius-pill);
  font-weight: 700;
  font-size: 12px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
@media (prefers-color-scheme: dark) {
  .eyebrow { color: var(--primary-strong); }
}
.eyebrow .dot {
  width: 6px; height: 6px; border-radius: 999px;
  background: var(--accent);
}

.hero h1 {
  margin: 20px 0 16px;
  font-size: clamp(36px, 5.2vw, 56px);
  line-height: 1.06;
  font-weight: 800;
  letter-spacing: -0.025em;
  color: var(--fg);
}
.hero h1 .grad {
  background: linear-gradient(120deg, var(--primary), var(--accent-strong));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
@media (prefers-color-scheme: dark) {
  .hero h1 .grad { background: linear-gradient(120deg, var(--primary), var(--accent)); -webkit-background-clip: text; background-clip: text; }
}
.hero p.lead {
  font-size: 18px;
  color: var(--fg-muted);
  max-width: 540px;
  margin: 0 0 32px;
}
.hero__ctas { display: flex; gap: 12px; flex-wrap: wrap; }
.hero__note { margin: 18px 0 0; font-size: 13px; color: var(--fg-subtle); max-width: 480px; }

.hero__media {
  position: relative;
  display: grid;
  place-items: center;
  border-radius: var(--radius-lg);
  padding: 40px;
  background:
    radial-gradient(90% 90% at 50% 0%, color-mix(in srgb, var(--primary) 12%, transparent), transparent 70%),
    var(--surface);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
}
.hero__media img { width: min(260px, 70%); border-radius: 24px; }

.hero__badges {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 24px;
}
.badge {
  background: color-mix(in srgb, var(--surface) 90%, transparent);
  color: var(--fg);
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  font-size: 12px;
  font-weight: 700;
  border: 1px solid var(--border);
}

/* Section heads */
.section-head { text-align: center; max-width: 680px; margin: 0 auto 48px; }
.section-head h2 {
  font-size: clamp(28px, 3.6vw, 36px);
  line-height: 1.15;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 12px 0 12px;
}
.section-head p {
  color: var(--fg-muted);
  font-size: 17px;
  margin: 0;
}

/* Feature cards */
.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
@media (max-width: 920px) { .cards { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .cards { grid-template-columns: 1fr; } }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 26px;
  box-shadow: var(--shadow-sm);
  transition: transform .15s ease, box-shadow .15s ease, border-color .15s ease;
}
.card:hover { transform: translateY(-2px); box-shadow: var(--shadow); border-color: var(--border-strong); }
.card__icon {
  width: 46px; height: 46px;
  border-radius: 14px;
  background: var(--primary-soft);
  color: var(--primary-strong);
  display: inline-flex; align-items: center; justify-content: center;
  margin-bottom: 16px;
}
.card__icon--accent { background: var(--accent-soft); color: var(--accent-strong); }
.card h3 { margin: 0 0 8px; font-size: 18px; font-weight: 700; letter-spacing: -0.01em; }
.card p { margin: 0; color: var(--fg-muted); font-size: 15px; }

/* Verticais */
.verticals {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}
.vertical {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 22px;
  border-radius: var(--radius-pill);
  background: var(--surface);
  border: 1px solid var(--border);
  font-weight: 700;
  font-size: 15px;
  color: var(--fg);
  box-shadow: var(--shadow-sm);
}
.vertical span[aria-hidden] { color: var(--accent-strong); display: inline-flex; }

/* Steps */
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
@media (max-width: 920px) { .steps { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .steps { grid-template-columns: 1fr; } }
.step {
  padding: 24px;
  border-radius: var(--radius-lg);
  background: var(--surface);
  border: 1px solid var(--border);
}
.step__num {
  width: 36px; height: 36px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 999px;
  background: var(--primary);
  color: var(--on-primary);
  font-weight: 800;
  font-size: 14px;
  margin-bottom: 16px;
}
.step h3 { margin: 0 0 8px; font-size: 17px; font-weight: 700; }
.step p { margin: 0; color: var(--fg-muted); font-size: 15px; }

/* CTA band */
.cta-band {
  border-radius: var(--radius-lg);
  padding: 56px;
  background:
    radial-gradient(80% 120% at 100% 0%, color-mix(in srgb, var(--accent) 34%, transparent), transparent 60%),
    linear-gradient(120deg, #2270B5, #1A5A93);
  color: #FFFFFF;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-band h2 {
  margin: 0 0 12px;
  font-size: clamp(26px, 3vw, 34px);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: #FFFFFF;
}
.cta-band p { margin: 0 auto 28px; max-width: 560px; opacity: .92; font-size: 17px; }
.cta-band .btn-primary { background: #FFFFFF; color: #1A5A93; }
.cta-band .btn-primary:hover { background: #FFFFFF; color: #2270B5; }
.cta-band .btn-ghost {
  background: transparent;
  color: #FFFFFF;
  border-color: rgba(255, 255, 255, .45);
}
.cta-band .btn-ghost:hover { background: rgba(255, 255, 255, .14); color: #FFFFFF; }
@media (max-width: 640px) { .cta-band { padding: 40px 24px; } }

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 40px 0;
  margin-top: 40px;
  color: var(--fg-subtle);
  font-size: 14px;
}
.site-footer__inner {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 32px;
  align-items: center;
  justify-content: space-between;
}
.site-footer nav { display: flex; gap: 20px; flex-wrap: wrap; }
.site-footer nav a { color: var(--fg-muted); font-weight: 600; }
.site-footer nav a:hover { color: var(--fg); }

/* ----- Páginas legais ----- */
.doc-hero {
  padding: 72px 0 24px;
  background:
    radial-gradient(60% 60% at 100% 0%, color-mix(in srgb, var(--primary) 14%, transparent), transparent 60%);
}
.doc-hero h1 {
  font-size: clamp(30px, 4vw, 42px);
  line-height: 1.15;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 16px 0 8px;
}
.doc-hero p { color: var(--fg-muted); margin: 0; }

.doc {
  max-width: 760px;
  margin: 0 auto;
  padding: 32px 0 80px;
}
.doc h2 {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 40px 0 12px;
}
.doc h3 {
  font-size: 17px;
  font-weight: 700;
  margin: 24px 0 8px;
}
.doc p, .doc li { color: var(--fg-muted); font-size: 16px; }
.doc ul, .doc ol { padding-left: 22px; }
.doc li { margin: 6px 0; }
.doc strong { color: var(--fg); font-weight: 700; }
.doc hr { border: none; border-top: 1px solid var(--border); margin: 32px 0; }

.doc table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  font-size: 15px;
}
.doc th, .doc td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  color: var(--fg-muted);
  vertical-align: top;
}
.doc th { color: var(--fg); font-weight: 700; }
.table-wrap { overflow-x: auto; }

.callout {
  margin: 24px 0;
  padding: 20px 24px;
  background: var(--primary-soft-2);
  border: 1px solid color-mix(in srgb, var(--primary) 30%, transparent);
  border-left: 4px solid var(--primary);
  border-radius: var(--radius);
}
.callout--warn {
  background: var(--accent-soft);
  border-color: color-mix(in srgb, var(--accent) 45%, transparent);
  border-left-color: var(--accent);
}
@media (prefers-color-scheme: dark) {
  .callout { background: color-mix(in srgb, var(--primary-soft) 60%, transparent); }
  .callout--warn { background: color-mix(in srgb, var(--accent-soft) 70%, transparent); }
}
.callout p:last-child { margin-bottom: 0; }
.callout strong { color: var(--fg); }

.toc {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin: 16px 0 32px;
}
.toc strong { display: block; margin-bottom: 8px; font-size: 14px; letter-spacing: 0.04em; text-transform: uppercase; color: var(--fg-subtle); }
.toc ol { margin: 0; padding-left: 20px; }
.toc li { margin: 4px 0; font-size: 15px; }
.toc a { color: var(--fg); }
.toc a:hover { color: var(--primary); }

.muted { color: var(--fg-subtle); font-size: 13px; }

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
  html { scroll-behavior: auto; }
}