/* =========================================================
   Landing Page — Transações Tributárias Sustentáveis
   Estilo: institucional, sóbrio, ESG (verde profundo) +
   acabamento dourado/jurídico. Mobile-first.
   ========================================================= */

/* ---------- Design Tokens ---------- */
:root {
  --color-bg: #fdfcf8;            /* off-white papel */
  --color-surface: #ffffff;
  --color-muted: #f3f1ea;         /* bege muito claro */
  --color-text: #1a2a23;          /* verde-grafite */
  --color-text-soft: #4b5b53;
  --color-border: #e6e2d6;

  --color-primary: #15433a;       /* verde institucional profundo */
  --color-primary-700: #0f3128;
  --color-primary-100: #d9e6e0;

  --color-accent: #b89052;        /* dourado sóbrio */
  --color-accent-700: #95713d;

  --color-dark: #0f1f1a;          /* fundo escuro p/ seções */
  --color-dark-soft: #1a2f28;

  --color-error: #b3261e;
  --color-success: #1f6f4a;

  --font-serif: "Cormorant Garamond", Georgia, "Times New Roman", serif;
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;

  --shadow-sm: 0 1px 2px rgba(15, 31, 26, 0.06), 0 2px 8px rgba(15, 31, 26, 0.04);
  --shadow-md: 0 8px 24px rgba(15, 31, 26, 0.08);
  --shadow-lg: 0 24px 60px rgba(15, 31, 26, 0.18);

  --container: 1140px;
  --transition: 200ms ease;
}

/* ---------- Reset básico ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img { max-width: 100%; display: block; }
a { color: var(--color-primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-accent); }

h1, h2, h3 { font-family: var(--font-serif); font-weight: 600; letter-spacing: -0.01em; line-height: 1.15; margin: 0; }

/* ---------- Layout helpers ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 1.25rem;
}

.section {
  padding: 4rem 0;
}
@media (min-width: 768px) { .section { padding: 6rem 0; } }

.section-muted { background: var(--color-muted); }
.section-dark  { background: var(--color-dark); color: #e9efeb; }
.section-cta   { background: linear-gradient(135deg, var(--color-primary), var(--color-primary-700)); color: #fff; }

.section-head { max-width: 720px; margin: 0 auto 3rem; text-align: center; }
.section-title { font-size: clamp(1.75rem, 3.5vw, 2.5rem); margin-bottom: 1rem; }
.section-lead  { font-size: 1.05rem; color: var(--color-text-soft); }
.section-dark .section-lead, .section-cta .section-lead { color: rgba(255,255,255,0.78); }

.eyebrow {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 1rem;
}
.eyebrow-light { color: var(--color-accent); }

/* ---------- Botões ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 0.5rem;
  padding: 0.95rem 1.6rem;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: transform var(--transition), background var(--transition), color var(--transition), box-shadow var(--transition);
}
.btn-sm { padding: 0.6rem 1rem; font-size: 0.85rem; }
.btn-block { width: 100%; }
.btn-primary {
  background: var(--color-accent);
  color: #1a1408;
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover { background: var(--color-accent-700); color: #fff; transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-ghost {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-border);
}
.btn-ghost:hover { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }
.btn-link { background: transparent; color: inherit; padding: 0.95rem 0.5rem; }
.btn-link:hover { color: var(--color-accent); }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(253, 252, 248, 0.85);
  backdrop-filter: saturate(140%) blur(10px);
  -webkit-backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--color-border);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  padding: 0.9rem 1.25rem;
  gap: 1rem;
}
.brand { display: flex; align-items: center; gap: 0.75rem; color: var(--color-primary); }
.brand-mark {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--color-primary);
  letter-spacing: 0.05em;
}
.brand-mark-accent { color: var(--color-accent); }
.brand-text {
  display: none;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-text-soft);
}
@media (min-width: 768px) { .brand-text { display: inline; } }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  overflow: hidden;
  padding: 3.5rem 0 4rem;
}
.hero-bg {
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse at top right, rgba(184, 144, 82, 0.12), transparent 50%),
    radial-gradient(ellipse at bottom left, rgba(21, 67, 58, 0.08), transparent 60%),
    var(--color-bg);
  z-index: 0;
}
.hero-inner {
  position: relative; z-index: 1;
  display: grid;
  gap: 3rem;
  align-items: center;
}
@media (min-width: 960px) {
  .hero { padding: 5rem 0 6rem; }
  .hero-inner { grid-template-columns: 1.2fr 0.8fr; gap: 4rem; }
}
.hero-title {
  font-size: clamp(2.1rem, 5.5vw, 3.6rem);
  margin-bottom: 1.25rem;
}
.hero-title em {
  font-style: italic;
  color: var(--color-primary);
}
.hero-subtitle {
  font-size: 1.1rem;
  color: var(--color-text-soft);
  max-width: 560px;
  margin-bottom: 2rem;
}
.hero-ctas { display: flex; flex-wrap: wrap; gap: 0.75rem; align-items: center; margin-bottom: 2.5rem; }
.hero-meta {
  list-style: none; padding: 1.25rem 1.5rem; margin: 0;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  color: var(--color-text-soft);
  display: grid; gap: 0.5rem;
  box-shadow: var(--shadow-sm);
}
.hero-meta strong { color: var(--color-primary); font-weight: 600; }

/* Capa do livro estilizada */
.hero-book { display: flex; justify-content: center; perspective: 1200px; }
.book {
  width: min(280px, 80vw);
  aspect-ratio: 2 / 3;
  transform: rotateY(-8deg) rotateX(2deg);
  transition: transform 600ms ease;
  filter: drop-shadow(0 30px 40px rgba(15, 31, 26, 0.35));
}
.book:hover { transform: rotateY(-2deg) rotateX(0); }
.book-cover {
  width: 100%; height: 100%;
  background: linear-gradient(160deg, var(--color-primary) 0%, var(--color-primary-700) 100%);
  border-radius: 4px 10px 10px 4px;
  padding: 2rem 1.5rem;
  color: #f5efe0;
  display: flex; flex-direction: column;
  position: relative;
  border-left: 6px solid var(--color-accent);
}
.book-cover::before {
  content: ""; position: absolute; inset: 12px;
  border: 1px solid rgba(184, 144, 82, 0.4);
  border-radius: 2px;
  pointer-events: none;
}
.book-eyebrow {
  font-size: 0.7rem; letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--color-accent); font-weight: 600;
}
.book-title {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  margin: 1rem 0 0.5rem;
  line-height: 1.1;
}
.book-sub {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 0.95rem;
  color: rgba(245, 239, 224, 0.8);
  margin: 0;
}
.book-divider {
  width: 40px; height: 2px; background: var(--color-accent);
  margin: auto 0 1rem;
}
.book-authors {
  font-family: var(--font-serif);
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin: 0;
}

/* ---------- Cards (Problema) ---------- */
.cards-grid {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: 1fr;
}
@media (min-width: 768px) { .cards-grid { grid-template-columns: repeat(3, 1fr); } }
.card {
  padding: 2rem 1.75rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: transform var(--transition), box-shadow var(--transition);
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.card h3 { font-size: 1.25rem; margin-bottom: 0.5rem; color: var(--color-primary); }
.card p { margin: 0; color: var(--color-text-soft); }
.card-icon { font-size: 1.75rem; margin-bottom: 0.75rem; }
.card-dark {
  background: var(--color-dark-soft);
  border-color: rgba(255,255,255,0.08);
}
.card-dark h3 { color: var(--color-accent); }
.card-dark p { color: rgba(255,255,255,0.72); }

/* ---------- Quotes (Autoridade) ---------- */
.quotes-grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: 1fr;
}
@media (min-width: 768px) { .quotes-grid { grid-template-columns: repeat(3, 1fr); } }
.quote {
  margin: 0;
  padding: 2rem;
  background: var(--color-surface);
  border-radius: var(--radius-md);
  border-top: 3px solid var(--color-accent);
  box-shadow: var(--shadow-sm);
  position: relative;
}
.quote::before {
  content: "“";
  font-family: var(--font-serif);
  font-size: 4rem;
  line-height: 1;
  color: var(--color-accent);
  opacity: 0.4;
  position: absolute; top: 0.5rem; left: 1rem;
}
.quote p {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-style: italic;
  color: var(--color-text);
  margin: 0 0 1rem;
  position: relative;
}
.quote cite {
  font-style: normal;
  font-size: 0.85rem;
  color: var(--color-text-soft);
  font-weight: 500;
}

/* ---------- Benefits ---------- */
.benefits-grid {
  display: grid; gap: 1.5rem;
  grid-template-columns: 1fr;
}
@media (min-width: 768px) { .benefits-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px){ .benefits-grid { grid-template-columns: repeat(4, 1fr); } }
.benefit {
  padding: 2rem 1.5rem;
  background: var(--color-surface);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
}
.benefit-num {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-accent);
  display: block;
  margin-bottom: 0.5rem;
}
.benefit h3 { font-size: 1.15rem; color: var(--color-primary); margin-bottom: 0.5rem; }
.benefit p { margin: 0; color: var(--color-text-soft); font-size: 0.95rem; }

/* ---------- Two-column (Sobre o livro) ---------- */
.two-col {
  display: grid; gap: 3rem;
  grid-template-columns: 1fr;
  align-items: center;
}
@media (min-width: 900px) { .two-col { grid-template-columns: 1.1fr 0.9fr; gap: 4rem; } }
.two-col-text .section-title { text-align: left; }
.two-col-text > p { color: var(--color-text-soft); margin: 1rem 0 1.5rem; }

.checklist { list-style: none; padding: 0; margin: 0 0 2rem; }
.checklist li {
  position: relative;
  padding: 0.5rem 0 0.5rem 2rem;
  border-bottom: 1px dashed var(--color-border);
  font-size: 0.95rem;
}
.checklist li:last-child { border-bottom: 0; }
.checklist li::before {
  content: "✓";
  position: absolute; left: 0; top: 0.55rem;
  width: 1.4rem; height: 1.4rem;
  background: var(--color-primary-100);
  color: var(--color-primary);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.8rem; font-weight: 700;
}

.stats {
  display: grid; gap: 1rem;
  grid-template-columns: 1fr;
  background: var(--color-primary);
  padding: 2.5rem 2rem;
  border-radius: var(--radius-lg);
  color: #fff;
  position: relative;
  overflow: hidden;
}
.stats::before {
  content: ""; position: absolute; top: -40px; right: -40px;
  width: 160px; height: 160px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(184,144,82,0.25), transparent 70%);
}
.stat { padding: 1rem 0; border-bottom: 1px solid rgba(255,255,255,0.12); position: relative; }
.stat:last-child { border-bottom: 0; }
.stat-num {
  display: block;
  font-family: var(--font-serif);
  font-size: 2.75rem;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
}
.stat-label { font-size: 0.9rem; color: rgba(255,255,255,0.85); display: block; margin-top: 0.4rem; }
.stat-label small { color: rgba(255,255,255,0.55); font-size: 0.78rem; }

/* ---------- Form ---------- */
.form-wrap { max-width: 620px; }
.form-head { text-align: center; margin-bottom: 2.5rem; }
.form-head .section-title { color: #fff; }

.lead-form {
  background: var(--color-surface);
  color: var(--color-text);
  padding: 2rem 1.75rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}
@media (min-width: 640px) { .lead-form { padding: 2.5rem; } }

.form-row { margin-bottom: 1.25rem; }
.form-row label {
  display: block; font-size: 0.85rem; font-weight: 600;
  margin-bottom: 0.4rem; color: var(--color-primary);
}
.form-row input[type="text"],
.form-row input[type="email"],
.form-row select {
  width: 100%;
  padding: 0.85rem 1rem;
  font-family: inherit;
  font-size: 1rem;
  color: var(--color-text);
  background: var(--color-bg);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.form-row input:focus,
.form-row select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(21, 67, 58, 0.12);
}
.form-row input.invalid,
.form-row select.invalid { border-color: var(--color-error); }

.form-error {
  display: block;
  font-size: 0.8rem;
  color: var(--color-error);
  margin-top: 0.35rem;
  min-height: 1rem;
}

.form-check { margin-top: 1rem; }
.check {
  display: flex; gap: 0.6rem; align-items: flex-start;
  font-size: 0.85rem; color: var(--color-text-soft); cursor: pointer;
}
.check input { margin-top: 0.25rem; }
.check a { color: var(--color-primary); text-decoration: underline; }

.form-guarantee {
  text-align: center;
  font-size: 0.85rem;
  color: var(--color-text-soft);
  margin: 1rem 0 0;
}

.form-success {
  margin-top: 1.5rem;
  padding: 1.25rem;
  background: rgba(31, 111, 74, 0.08);
  border: 1px solid rgba(31, 111, 74, 0.25);
  border-radius: var(--radius-md);
  text-align: center;
}
.form-success h3 { color: var(--color-success); font-size: 1.25rem; margin-bottom: 0.5rem; }
.form-success p { margin: 0; color: var(--color-text-soft); font-size: 0.9rem; }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--color-dark);
  color: rgba(255,255,255,0.7);
  padding: 3rem 0 2rem;
}
.footer-inner {
  display: grid; gap: 1.5rem;
  text-align: center;
}
@media (min-width: 768px) {
  .footer-inner { grid-template-columns: 1fr auto 1fr; align-items: center; text-align: left; }
  .footer-copy { text-align: right; }
}
.footer-brand .brand-mark { color: #fff; }
.footer-brand p { font-size: 0.85rem; margin: 0.5rem 0 0; }
.footer-nav { display: flex; gap: 1.5rem; justify-content: center; flex-wrap: wrap; }
.footer-nav a { color: rgba(255,255,255,0.75); font-size: 0.9rem; }
.footer-nav a:hover { color: var(--color-accent); }
.footer-copy { font-size: 0.8rem; color: rgba(255,255,255,0.5); margin: 0; }

/* ---------- Animações sutis ---------- */
@media (prefers-reduced-motion: no-preference) {
  .reveal { opacity: 0; transform: translateY(16px); transition: opacity 700ms ease, transform 700ms ease; }
  .reveal.is-visible { opacity: 1; transform: none; }
}