/* ==========================================================================
   Site éditorial — aligné sur la charte du livre (book.css)
   EB Garamond + Montserrat · Navy #0a1c3e · Gold #c5a069
   ========================================================================== */

:root {
  --ink: #141a1f;
  --ink-mid: #2e3f4d;
  --ink-light: #4a5d6b;
  --navy: #0a1c3e;
  --navy-deep: #0a3344;
  --navy-mid: #145068;
  --gold: #c5a069;
  --gold-dark: #b8892a;
  --gold-light: #f0e4c8;
  --cream: #f9f7f2;
  --bg: #f4f6f8;
  --bg-soft: #eef2f5;
  --surface: #ffffff;
  --border: #c5ced6;
  --border-light: #dde4ea;
  --success: #1b6b45;
  --success-bg: #ecfdf5;
  --error: #9c2f23;
  --error-bg: #fef2f2;
  --shadow-sm: 0 4px 20px rgba(10, 28, 62, 0.06);
  --shadow-md: 0 16px 40px rgba(10, 28, 62, 0.1);
  --shadow-lg: 0 24px 56px rgba(10, 28, 62, 0.12);
  --radius: 4px;
  --radius-lg: 8px;
  --header-h: 4.75rem;
  --font-serif: "EB Garamond", Garamond, "Times New Roman", serif;
  --font-sans: "Montserrat", "Segoe UI", Helvetica, Arial, sans-serif;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 1.25rem);
}

body {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 1.0625rem;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.icon {
  flex-shrink: 0;
  display: block;
}

.container {
  width: min(1140px, calc(100% - 2.5rem));
  margin-inline: auto;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 9999;
  padding: 0.75rem 1rem;
  background: var(--navy);
  color: #fff;
  font-family: var(--font-sans);
  border-radius: var(--radius);
}

.skip-link:focus { left: 1rem; top: 1rem; }

/* ---- Background ---- */
.page-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(ellipse 60% 45% at 0% 0%, rgba(197, 160, 105, 0.1), transparent 55%),
    radial-gradient(ellipse 50% 40% at 100% 0%, rgba(10, 28, 62, 0.06), transparent 50%),
    var(--bg);
}

/* ---- Gold rules (book cover motif) ---- */
.gold-rule {
  width: 100%;
  max-width: 120px;
  height: 2px;
  background: var(--gold);
  margin: 0.65rem 0 1rem;
}

.gold-rule.short { max-width: 48px; margin-bottom: 0.85rem; }
.gold-rule.centered { margin-inline: auto; }

.eyebrow {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.28em;
  text-transform: uppercase;
}

.eyebrow-gold { color: var(--gold-dark); }
.eyebrow-navy { color: var(--navy); margin-bottom: 1rem; }

.section-eyebrow {
  margin: 0 0 0.75rem;
  font-family: var(--font-sans);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gold-dark);
}

/* ---- Header ---- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(249, 247, 242, 0.92);
  border-bottom: 1px solid var(--border-light);
  backdrop-filter: blur(12px);
}

.header-shell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: 1.5rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  text-decoration: none;
  color: inherit;
  min-width: 0;
}

.brand-mark {
  flex-shrink: 0;
  display: grid;
  place-items: center;
  width: 2.6rem;
  height: 2.6rem;
  border-radius: var(--radius);
  background: var(--navy);
  color: var(--gold);
  box-shadow: var(--shadow-sm);
}

.brand-mark .icon { stroke: var(--gold); }

.brand-text {
  display: block;
  font-family: var(--font-sans);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--navy);
  line-height: 1.25;
}

.brand-sub {
  display: block;
  font-family: var(--font-sans);
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold-dark);
  margin-top: 0.15rem;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 0.15rem;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 0.7rem;
  font-family: var(--font-sans);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--ink-mid);
  text-decoration: none;
  border-radius: var(--radius);
  transition: color 0.15s, background 0.15s;
}

.nav-link .icon { opacity: 0.65; }

.nav-link:hover,
.nav-link.is-active {
  color: var(--navy);
  background: rgba(255, 255, 255, 0.8);
}

.nav-link.is-active .icon { color: var(--gold-dark); opacity: 1; }

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  margin-left: 0.35rem;
  padding: 0.55rem 1rem;
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: #fff;
  text-decoration: none;
  background: var(--navy);
  border-radius: var(--radius);
  transition: background 0.15s, transform 0.15s;
}

.nav-cta:hover {
  color: #fff;
  background: var(--navy-deep);
  transform: translateY(-1px);
}

.nav-cta .icon { stroke: var(--gold); }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 2.5rem;
  height: 2.5rem;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  height: 2px;
  margin: 0 7px;
  background: var(--navy);
  transition: transform 0.2s, opacity 0.2s;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---- Sections ---- */
.section { padding: 5rem 0; }

.section-cream {
  background: var(--cream);
  border-block: 1px solid rgba(197, 160, 105, 0.2);
}

.section-head { max-width: 680px; margin-bottom: 3rem; }
.section-head-center { text-align: center; margin-inline: auto; }

.section-head h2,
.hero h1 {
  margin: 0 0 1rem;
  font-family: var(--font-serif);
  font-weight: 700;
  color: var(--navy);
  line-height: 1.18;
}

.section-head h2 { font-size: clamp(1.85rem, 3.2vw, 2.45rem); }

.section-lead {
  margin: 0;
  font-size: 1.125rem;
  color: var(--ink-mid);
  line-height: 1.65;
}

/* ---- Hero ---- */
.hero {
  padding: 3.5rem 0 2.5rem;
  background: linear-gradient(180deg, var(--cream) 0%, var(--bg) 100%);
  border-bottom: 1px solid var(--border-light);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 3rem;
  align-items: center;
}

.hero h1 {
  font-size: clamp(2rem, 3.8vw, 2.85rem);
  font-weight: 700;
  margin-bottom: 1rem;
}

.hero-authors {
  margin: 0 0 1.25rem;
  font-family: var(--font-sans);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-light);
}

.hero-authors a {
  color: var(--navy);
  text-decoration: none;
  border-bottom: 1px solid var(--gold);
}

.hero-authors a:hover { color: var(--gold-dark); }

.hero-authors .sep { margin: 0 0.25rem; color: var(--gold); }

.hero-lead {
  margin: 0 0 2rem;
  font-size: 1.15rem;
  color: var(--ink-mid);
  max-width: 54ch;
}

.hero-lead em {
  font-style: italic;
  color: var(--navy);
  font-weight: 600;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
}

.btn-primary,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  padding: 0.85rem 1.35rem;
  font-family: var(--font-sans);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  border-radius: var(--radius);
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: transform 0.15s, box-shadow 0.15s, background 0.15s;
}

.btn-primary {
  color: #fff;
  background: var(--navy);
  box-shadow: var(--shadow-sm);
}

.btn-primary .icon { stroke: var(--gold); }

.btn-primary:hover:not(:disabled) {
  color: #fff;
  background: var(--navy-deep);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  color: var(--navy);
  background: var(--surface);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  color: var(--navy);
  border-color: var(--gold);
  transform: translateY(-1px);
}

.btn-full { width: 100%; }

/* ---- Book mockup (matches cover) ---- */
.hero-book { display: flex; justify-content: center; }

.book-mockup {
  display: flex;
  width: 100%;
  max-width: 380px;
  box-shadow: var(--shadow-lg);
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
  overflow: hidden;
}

.book-sidebar {
  position: relative;
  width: 28px;
  flex-shrink: 0;
  background: var(--navy);
}

.book-sidebar-accent {
  position: absolute;
  top: 24px;
  left: 6px;
  width: 14px;
  height: 14px;
  background: var(--gold);
}

.book-face {
  flex: 1;
  padding: 2rem 1.75rem 1.5rem;
  background: var(--cream);
  color: var(--navy);
  min-height: 420px;
  display: flex;
  flex-direction: column;
}

.book-kicker-gold {
  margin: 0 0 0.5rem;
  font-family: var(--font-sans);
  font-size: 0.58rem;
  font-weight: 600;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--gold-dark);
}

.book-kicker-navy {
  margin: 0 0 1rem;
  font-family: var(--font-sans);
  font-size: 0.58rem;
  font-weight: 600;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--navy);
}

.book-headline {
  margin: 0 0 1rem;
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 700;
  line-height: 1.22;
}

.book-sub {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 0.78rem;
  font-weight: 500;
  line-height: 1.5;
  color: var(--ink-mid);
}

.book-footer {
  margin-top: auto;
  padding-top: 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 1rem;
}

.book-authors-block {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
}

.book-authors-block .icon { color: var(--gold-dark); stroke: var(--gold-dark); }

.book-author-line {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 0.58rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  line-height: 1.6;
}

.book-edition {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding-left: 0.85rem;
  border-left: 2px solid var(--gold);
}

.book-edition-label {
  font-family: var(--font-sans);
  font-size: 0.55rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--navy);
}

.book-edition-year {
  font-family: var(--font-sans);
  font-size: 1.65rem;
  font-weight: 800;
  color: var(--gold-dark);
  line-height: 1;
}

/* ---- Stats ---- */
.stats-bar { padding: 0 0 3.5rem; }

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 1.75rem 1.25rem;
  background: var(--surface);
  border: 1px solid var(--border-light);
  border-top: 3px solid var(--gold);
  box-shadow: var(--shadow-sm);
}

.stat-icon {
  display: grid;
  place-items: center;
  width: 2.75rem;
  height: 2.75rem;
  margin-bottom: 0.75rem;
  border-radius: 50%;
  background: var(--gold-light);
  color: var(--navy);
}

.stat-value {
  font-family: var(--font-serif);
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--navy);
  line-height: 1;
  margin-bottom: 0.35rem;
}

.stat-label {
  font-family: var(--font-sans);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-light);
}

/* ---- Pillars ---- */
.pillars-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.pillar-card {
  padding: 1.75rem;
  background: var(--surface);
  border: 1px solid var(--border-light);
  border-left: 4px solid var(--gold);
  box-shadow: var(--shadow-sm);
}

.pillar-icon {
  display: grid;
  place-items: center;
  width: 2.75rem;
  height: 2.75rem;
  margin-bottom: 1rem;
  background: var(--navy);
  color: var(--gold);
  border-radius: var(--radius);
}

.pillar-icon .icon { stroke: var(--gold); }

.pillar-card h3 {
  margin: 0 0 0.6rem;
  font-family: var(--font-sans);
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--navy);
}

.pillar-card p {
  margin: 0;
  font-size: 1rem;
  color: var(--ink-mid);
  line-height: 1.6;
}

/* ---- Chapters ---- */
.chapters-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

.chapter-card {
  padding: 1.75rem;
  background: var(--surface);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
}

.chapter-num {
  display: inline-block;
  margin-bottom: 0.65rem;
  padding: 0.2rem 0.55rem;
  font-family: var(--font-sans);
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gold-dark);
  background: var(--gold-light);
}

.chapter-card h3 {
  margin: 0 0 1rem;
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--navy);
}

.chapter-card ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.chapter-card li {
  display: flex;
  align-items: flex-start;
  gap: 0.45rem;
  padding: 0.35rem 0;
  font-size: 0.98rem;
  color: var(--ink-mid);
  border-bottom: 1px solid var(--border-light);
}

.chapter-card li:last-child { border-bottom: none; }

.chapter-card li .icon {
  margin-top: 0.2rem;
  color: var(--gold-dark);
  flex-shrink: 0;
}

/* ---- Audience ---- */
.audience-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.audience-card {
  padding: 2rem 1.75rem;
  background: var(--surface);
  border: 1px solid var(--border-light);
  text-align: center;
}

.audience-icon {
  display: grid;
  place-items: center;
  width: 3.25rem;
  height: 3.25rem;
  margin: 0 auto 1.15rem;
  border-radius: 50%;
  background: var(--navy);
  color: var(--gold);
}

.audience-icon .icon { stroke: var(--gold); }

.audience-card h3 {
  margin: 0 0 0.5rem;
  font-family: var(--font-sans);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--navy);
}

.audience-card p {
  margin: 0;
  font-size: 1rem;
  color: var(--ink-mid);
}

/* ---- Authors (professional showcase) ---- */
.section-authors {
  background: linear-gradient(180deg, var(--bg) 0%, var(--cream) 40%, var(--cream) 100%);
  border-top: 1px solid rgba(197, 160, 105, 0.25);
}

.section-authors .section-head h2 {
  font-size: clamp(1.65rem, 3vw, 2.2rem);
}

.author-quote {
  position: relative;
  max-width: 780px;
  margin: 0 auto 3.5rem;
  padding: 2rem 2.5rem 2rem 3.5rem;
  background: var(--surface);
  border: 1px solid var(--border-light);
  border-left: 4px solid var(--gold);
  box-shadow: var(--shadow-sm);
}

.quote-icon {
  position: absolute;
  top: 1.25rem;
  left: 1.25rem;
  color: var(--gold);
  opacity: 0.85;
}

.author-quote p {
  margin: 0;
  font-size: 1.2rem;
  font-style: italic;
  line-height: 1.65;
  color: var(--navy);
}

.authors-showcase {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}

.author-profile {
  background: var(--surface);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-md);
  scroll-margin-top: calc(var(--header-h) + 1.5rem);
  overflow: hidden;
}

.author-profile:target {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
}

.author-profile-header {
  display: flex;
  gap: 1.25rem;
  padding: 2rem 2rem 1.25rem;
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-deep) 100%);
  color: #fff;
}

.author-portrait {
  position: relative;
  flex-shrink: 0;
  width: 5rem;
  height: 5rem;
}

.author-portrait-ring {
  position: absolute;
  inset: -4px;
  border: 2px solid var(--gold);
  border-radius: 50%;
}

.author-portrait-initials {
  display: grid;
  place-items: center;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.12);
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  color: var(--gold);
}

.author-profile-role {
  margin: 0 0 0.25rem;
  font-family: var(--font-sans);
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold);
}

.author-profile-name {
  margin: 0 0 0.35rem;
  font-family: var(--font-serif);
  font-size: 1.45rem;
  font-weight: 700;
  line-height: 1.2;
}

.author-profile-name a {
  color: #fff;
  text-decoration: none;
}

.author-profile-name a:hover { color: var(--gold-light); }

.author-profile-title {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: rgba(255, 255, 255, 0.75);
}

.author-profile-header .gold-rule {
  margin-top: 0.85rem;
  background: var(--gold);
}

.author-profile-bio {
  margin: 0;
  padding: 1.75rem 2rem 0;
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--ink-mid);
}

.author-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 1.25rem 2rem 0;
}

.author-tag {
  padding: 0.35rem 0.75rem;
  font-family: var(--font-sans);
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--navy);
  background: var(--gold-light);
  border: 1px solid rgba(197, 160, 105, 0.45);
  border-radius: 999px;
}

.author-contributions {
  margin: 1.5rem 2rem 2rem;
  padding: 1.25rem 1.35rem;
  background: var(--bg-soft);
  border: 1px solid var(--border-light);
  border-left: 3px solid var(--gold);
}

.author-contributions h4 {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0 0 0.85rem;
  font-family: var(--font-sans);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--navy);
}

.author-contributions h4 .icon { color: var(--gold-dark); }

.author-contributions ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.author-contributions li {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  padding: 0.35rem 0;
  font-size: 0.95rem;
  color: var(--ink-mid);
}

.author-contributions li .icon {
  margin-top: 0.15rem;
  color: var(--gold-dark);
  flex-shrink: 0;
}

/* ---- Download ---- */
.section-download {
  background: var(--bg-soft);
  border-top: 1px solid var(--border-light);
}

.download-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}

.download-checklist {
  margin: 1.5rem 0 0;
  padding: 0;
  list-style: none;
}

.download-checklist li {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.55rem 0;
  font-size: 1rem;
  color: var(--ink-mid);
}

.download-checklist .icon { color: var(--gold-dark); flex-shrink: 0; }

.form-card {
  background: var(--surface);
  border: 1px solid var(--border-light);
  border-top: 3px solid var(--gold);
  box-shadow: var(--shadow-lg);
  padding: 2rem;
}

.form-card-header {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  margin-bottom: 1.5rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--border-light);
}

.form-card-header .icon {
  color: var(--navy);
  margin-top: 0.15rem;
}

.form-title {
  margin: 0 0 0.25rem;
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--navy);
}

.form-subtitle {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 0.75rem;
  color: var(--ink-light);
}

.field { margin-bottom: 1rem; }

.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

label {
  display: block;
  margin-bottom: 0.4rem;
  font-family: var(--font-sans);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-mid);
}

label span { color: var(--gold-dark); }

input {
  width: 100%;
  padding: 0.75rem 0.95rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  color: var(--ink);
  background: #fff;
  transition: border-color 0.15s, box-shadow 0.15s;
}

input:focus {
  outline: none;
  border-color: var(--navy);
  box-shadow: 0 0 0 3px rgba(10, 28, 62, 0.1);
}

.consent {
  margin: 0 0 1.25rem;
  font-size: 0.82rem;
  line-height: 1.55;
  color: var(--ink-light);
}

.btn-spinner {
  width: 1rem;
  height: 1rem;
  border: 2px solid rgba(255, 255, 255, 0.35);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

.btn-primary:disabled { opacity: 0.7; cursor: not-allowed; transform: none; }

.form-message {
  margin-top: 1rem;
  padding: 0.85rem 1rem;
  border-radius: var(--radius);
  font-family: var(--font-sans);
  font-size: 0.88rem;
}

.form-message.success {
  background: var(--success-bg);
  color: var(--success);
  border: 1px solid #bbf7d0;
}

.form-message.error {
  background: var(--error-bg);
  color: var(--error);
  border: 1px solid #fecaca;
}

.form-countdown {
  margin: 0 0 1.5rem;
  padding: 1.25rem 1.1rem 1.35rem;
  background: linear-gradient(180deg, #0a1c3e 0%, #0a3344 100%);
  color: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
}

.countdown-kicker {
  margin: 0 0 1rem;
  font-family: var(--font-sans);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gold-light);
  text-align: center;
}

.countdown-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.55rem;
}

.countdown-unit {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0.7rem 0.3rem 0.65rem;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(197, 160, 105, 0.35);
  border-radius: var(--radius);
}

.countdown-value {
  font-family: var(--font-sans);
  font-size: 1.55rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  font-variant-numeric: tabular-nums;
  color: var(--gold);
  line-height: 1.1;
}

.countdown-label {
  margin-top: 0.3rem;
  font-family: var(--font-sans);
  font-size: 0.58rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.7);
}

.countdown-status {
  margin: 1rem 0 0;
  font-size: 0.92rem;
  line-height: 1.45;
  text-align: center;
  color: rgba(255, 255, 255, 0.82);
}

.form-card .whatsapp-invite { margin-top: 1.35rem; }

@media (max-width: 480px) {
  .countdown-grid { grid-template-columns: repeat(2, 1fr); }
  .countdown-value { font-size: 1.35rem; }
}

.whatsapp-invite {
  margin-top: 1.35rem;
  padding: 1.1rem 1.15rem 1.2rem;
  background: #f3faf6;
  border: 1px solid #cfe8d8;
  border-left: 3px solid #25d366;
  border-radius: var(--radius);
}

.whatsapp-invite-label {
  margin: 0 0 0.35rem;
  font-family: var(--font-sans);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #128c7e;
}

.whatsapp-invite-text {
  margin: 0 0 0.9rem;
  font-size: 0.88rem;
  line-height: 1.5;
  color: var(--ink-mid);
}

.btn-whatsapp {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  padding: 0.8rem 1.2rem;
  font-family: var(--font-sans);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  text-decoration: none;
  color: #fff;
  background: #128c7e;
  border-radius: var(--radius);
  border: none;
  transition: background 0.15s, transform 0.15s, box-shadow 0.15s;
}

.btn-whatsapp .icon { stroke: #fff; }

@media (prefers-reduced-motion: reduce) {
  .btn-whatsapp:hover { transform: none; }
}

/* ---- Footer ---- */
.site-footer {
  background: var(--navy);
  color: rgba(255, 255, 255, 0.85);
}

.footer-accent-bar {
  height: 4px;
  background: linear-gradient(90deg, var(--gold-dark), var(--gold), var(--gold-dark));
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 2.5rem;
  padding: 3.5rem 0;
}

.brand-footer .brand-text { color: #fff; }
.brand-footer .brand-mark { background: rgba(255,255,255,0.1); }

.footer-tagline {
  margin: 1rem 0 0.5rem;
  font-size: 0.95rem;
  line-height: 1.55;
  color: rgba(255, 255, 255, 0.6);
  max-width: 30ch;
}

.footer-edition {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gold);
}

.footer-col h4 {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  margin: 0 0 1rem;
  font-family: var(--font-sans);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gold);
}

.footer-col h4 .icon { stroke: var(--gold); }

.footer-col ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-col li { margin-bottom: 0.55rem; }

.footer-col a {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: rgba(255, 255, 255, 0.82);
  text-decoration: none;
  font-family: var(--font-sans);
  font-size: 0.82rem;
}

.footer-col a:hover { color: var(--gold-light); }

.footer-contact a {
  font-family: var(--font-sans);
  font-size: 0.88rem;
  color: rgba(255, 255, 255, 0.9);
  text-decoration: none;
}

.footer-contact a:hover { color: var(--gold); }

.footer-muted {
  margin: 0 0 0.5rem;
  font-family: var(--font-sans);
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.5);
}

.footer-muted a {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  color: rgba(255, 255, 255, 0.65);
  text-decoration: none;
}

.footer-bottom {
  padding: 1.75rem 0 2.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom-inner {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
}

.footer-bottom-inner > .icon {
  flex-shrink: 0;
  margin-top: 0.15rem;
  color: var(--gold);
  stroke: var(--gold);
}

.footer-bottom p {
  margin: 0 0 0.4rem;
  font-family: var(--font-sans);
  font-size: 0.78rem;
  color: rgba(255, 255, 255, 0.45);
}

.footer-legal {
  max-width: 72ch;
  line-height: 1.55;
}

/* ---- Reveal ---- */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* ---- Responsive ---- */
@media (max-width: 1024px) {
  .hero-grid,
  .download-grid,
  .authors-showcase { grid-template-columns: 1fr; }

  .pillars-grid,
  .audience-grid { grid-template-columns: 1fr; }

  .chapters-grid { grid-template-columns: 1fr; }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }

  .book-mockup { max-width: 100%; }
}

@media (max-width: 768px) {
  .section { padding: 3.5rem 0; }

  .nav-toggle { display: flex; }

  .site-nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    padding: 1rem;
    background: rgba(249, 247, 242, 0.98);
    border-bottom: 1px solid var(--border);
    transform: translateY(-110%);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.25s, opacity 0.25s;
  }

  .site-nav.is-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav-link { padding: 0.75rem 1rem; font-size: 0.88rem; }
  .nav-cta { margin: 0.5rem 0 0; justify-content: center; }

  .stats-grid { grid-template-columns: 1fr; }
  .field-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }

  .hero-actions { flex-direction: column; }
  .btn-primary, .btn-secondary { width: 100%; }

  .author-profile-header { flex-direction: column; align-items: center; text-align: center; }
  .author-profile-header .gold-rule { margin-inline: auto; }
  .author-quote { padding: 1.75rem 1.5rem 1.75rem 1.5rem; }
  .quote-icon { position: static; display: block; margin-bottom: 0.75rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .btn-spinner { animation: none; }
}