/* =========================================================
   Degenio — feuille de style
   Palette : encre / papier / signal (terracotta livre) / terminal (vert code)
   Typo : Space Grotesk (display) + Literata (corps) + JetBrains Mono (code/eyebrows)
   ========================================================= */

:root {
  --ink: #14213d;
  --ink-soft: #2c3a5e;
  --paper: #fbf8f2;
  --paper-alt: #f1ece1;
  --paper-deep: #e8e0cf;
  --signal: #e8622c;
  --signal-dark: #c94f20;
  --terminal: #2f6f5e;
  --terminal-bright: #4fae8f;
  --line: #dad3c3;
  --text: #1f2430;
  --text-muted: #5b5f6b;
  --white: #ffffff;

  --font-display: "Space Grotesk", system-ui, sans-serif;
  --font-body: "Literata", Georgia, serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;

  --radius: 10px;
  --shadow-soft: 0 1px 2px rgba(20, 33, 61, 0.06), 0 8px 24px -8px rgba(20, 33, 61, 0.12);
  --shadow-lift: 0 4px 8px rgba(20, 33, 61, 0.08), 0 20px 40px -12px rgba(20, 33, 61, 0.2);
  --max: 1120px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-body);
  background: var(--paper);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  color: var(--ink);
  line-height: 1.15;
  margin: 0 0 0.5em;
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(2.1rem, 4.2vw, 3.4rem); font-weight: 700; }
h2 { font-size: clamp(1.6rem, 3vw, 2.3rem); font-weight: 700; }
h3 { font-size: 1.25rem; font-weight: 600; }

p { margin: 0 0 1em; }
a { color: var(--signal-dark); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; display: block; }

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--terminal);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
}
.eyebrow::before {
  content: "";
  width: 8px; height: 8px;
  background: var(--signal);
  border-radius: 2px;
  display: inline-block;
}

/* ---------- Skip link / a11y ---------- */
.skip-link {
  position: absolute; left: -999px; top: 0;
  background: var(--ink); color: var(--white);
  padding: 10px 16px; z-index: 200; border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }

:focus-visible {
  outline: 3px solid var(--signal);
  outline-offset: 2px;
}

/* ---------- Header / nav ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(251, 248, 242, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.nav {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 24px;
  max-width: var(--max); margin: 0 auto;
}
.brand {
  font-family: var(--font-display);
  font-weight: 700; font-size: 1.3rem;
  color: var(--ink); display: flex; align-items: baseline; gap: 4px;
}
.brand span { color: var(--signal); font-family: var(--font-mono); font-weight: 500; font-size: 1rem; }
.brand:hover { text-decoration: none; }

.nav-links {
  display: flex; align-items: center; gap: 28px;
  font-family: var(--font-mono); font-size: 0.86rem;
}
.nav-links a { color: var(--ink-soft); }
.nav-links a.current { color: var(--signal-dark); font-weight: 700; }
.nav-links a:hover { color: var(--signal-dark); text-decoration: none; }

.nav-toggle { display: none; }

@media (max-width: 820px) {
  .nav-toggle {
    display: block; background: none; border: 1px solid var(--line);
    border-radius: 6px; padding: 8px 10px; font-family: var(--font-mono);
    cursor: pointer; color: var(--ink);
  }
  .nav-links {
    position: absolute; top: 100%; left: 0; right: 0;
    background: var(--paper); border-bottom: 1px solid var(--line);
    flex-direction: column; align-items: flex-start; gap: 0;
    padding: 8px 24px 16px; display: none;
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 10px 0; width: 100%; border-bottom: 1px dashed var(--line); }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-display); font-weight: 600; font-size: 0.98rem;
  padding: 13px 24px; border-radius: 999px; cursor: pointer;
  border: 1px solid transparent; transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary { background: var(--signal); color: var(--white); box-shadow: var(--shadow-soft); }
.btn-primary:hover { background: var(--signal-dark); box-shadow: var(--shadow-lift); }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.btn-ghost:hover { border-color: var(--ink); }
.btn-sm { padding: 9px 16px; font-size: 0.85rem; }
.btn-block { width: 100%; justify-content: center; }

/* ---------- Terminal signature block ---------- */
.terminal {
  background: var(--ink); color: var(--terminal-bright);
  border-radius: var(--radius); box-shadow: var(--shadow-lift);
  font-family: var(--font-mono); font-size: 0.92rem;
  overflow: hidden; max-width: 480px;
}
.terminal-bar {
  display: flex; gap: 6px; padding: 10px 14px;
  background: rgba(255,255,255,0.04); border-bottom: 1px solid rgba(255,255,255,0.08);
}
.terminal-bar span { width: 10px; height: 10px; border-radius: 50%; background: rgba(255,255,255,0.18); }
.terminal-body { padding: 18px 18px 22px; }
.terminal-body .prompt { color: var(--paper-deep); }
.terminal-body .out { color: var(--terminal-bright); }
.terminal-cursor {
  display: inline-block; width: 8px; height: 1.05em; background: var(--terminal-bright);
  margin-left: 2px; vertical-align: -2px;
  animation: blink 1s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

/* ---------- Sections ---------- */
section { padding: 72px 0; }
.section-alt { background: var(--paper-alt); }
.section-ink { background: var(--ink); color: var(--paper); }
.section-ink h2, .section-ink h3 { color: var(--paper); }
.section-ink .text-muted { color: #b9c0d4; }
.text-muted { color: var(--text-muted); }
.section-intro { max-width: 640px; margin: 0 0 40px; font-size: 1.08rem; color: var(--text-muted); }
.center { text-align: center; margin-left: auto; margin-right: auto; }

/* ---------- Hero ---------- */
.hero {
  padding: 64px 0 80px;
  background:
    radial-gradient(1200px 500px at 85% -10%, rgba(232,98,44,0.08), transparent 60%),
    var(--paper);
}
.hero-grid {
  display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 56px; align-items: center;
}
@media (max-width: 900px) { .hero-grid { grid-template-columns: 1fr; } }
.hero h1 { margin-bottom: 18px; }
.hero .lede { font-size: 1.18rem; color: var(--text-muted); max-width: 52ch; margin-bottom: 30px; }
.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 18px; }
.hero-note { font-family: var(--font-mono); font-size: 0.82rem; color: var(--text-muted); }

/* ---------- Book cover ---------- */
.cover-frame {
  position: relative; max-width: 320px; margin: 0 auto;
}
.cover-frame img {
  border-radius: 6px; box-shadow: var(--shadow-lift);
  border: 1px solid rgba(20,33,61,0.06);
}
.cover-badge {
  position: absolute; top: -12px; right: -12px;
  background: var(--terminal); color: var(--white);
  font-family: var(--font-mono); font-size: 0.72rem; font-weight: 600;
  padding: 8px 12px; border-radius: 8px; box-shadow: var(--shadow-soft);
  text-align: center; line-height: 1.3;
}

/* ---------- Bookshelf (home page grid) ---------- */
.shelf {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 26px;
}
@media (max-width: 980px) { .shelf { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .shelf { grid-template-columns: 1fr; } }

.book-card {
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; display: flex; flex-direction: column;
  box-shadow: var(--shadow-soft); transition: transform 0.18s ease, box-shadow 0.18s ease;
}
.book-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lift); }
.book-card .cover-wrap { background: var(--paper-alt); padding: 22px 22px 0; }
.book-card .cover-wrap img { margin: 0 auto; border-radius: 4px; box-shadow: 0 10px 20px -8px rgba(20,33,61,0.25); }
.book-card .body { padding: 18px 20px 22px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.book-tag { font-family: var(--font-mono); font-size: 0.72rem; color: var(--terminal); text-transform: uppercase; letter-spacing: 0.06em; }
.book-card h3 { font-size: 1.08rem; margin-bottom: 2px; }
.book-card .desc { font-size: 0.92rem; color: var(--text-muted); flex: 1; }
.book-card .actions { display: flex; gap: 8px; margin-top: 6px; flex-wrap: wrap; }

/* ---------- Feature grid ---------- */
.feature-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px;
}
@media (max-width: 860px) { .feature-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .feature-grid { grid-template-columns: 1fr; } }
.feature {
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px 20px;
}
.feature .num { font-family: var(--font-mono); color: var(--signal); font-size: 0.82rem; margin-bottom: 8px; display: block; }
.feature h4 { font-family: var(--font-display); font-size: 1.02rem; margin-bottom: 6px; color: var(--ink); font-weight: 700; }
.feature p { font-size: 0.94rem; color: var(--text-muted); margin: 0; }

/* ---------- Audience list ---------- */
.audience-list { display: grid; gap: 16px; max-width: 720px; margin: 0 auto; }
.audience-item { display: flex; gap: 14px; align-items: flex-start; }
.audience-item .ico {
  flex: 0 0 auto; width: 38px; height: 38px; border-radius: 8px;
  background: var(--paper-alt); border: 1px solid var(--line);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-mono); color: var(--terminal); font-weight: 700;
}
.audience-item h4 { margin: 0 0 2px; font-size: 1rem; }
.audience-item p { margin: 0; font-size: 0.92rem; color: var(--text-muted); }

/* ---------- Author ---------- */
.author-block { display: grid; grid-template-columns: 200px 1fr; gap: 36px; align-items: start; max-width: 760px; margin: 0 auto; }
@media (max-width: 640px) { .author-block { grid-template-columns: 1fr; text-align: center; } }
.author-pic {
  width: 160px; height: 160px; border-radius: 50%; object-fit: cover;
  border: 3px solid var(--paper-alt); margin: 0 auto;
}
.author-name { font-family: var(--font-mono); color: var(--terminal-bright); font-size: 0.85rem; margin-bottom: 6px; }

/* ---------- Placeholder cover box ---------- */
.cover-placeholder {
  aspect-ratio: 5/7; width: 100%; max-width: 260px; margin: 0 auto;
  border: 2px dashed var(--line); border-radius: 6px;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 8px; background: var(--paper-alt); color: var(--text-muted);
  font-family: var(--font-mono); font-size: 0.8rem; text-align: center; padding: 16px;
}

/* ---------- Callout / CTA band ---------- */
.cta-band {
  background: var(--ink); color: var(--paper);
  border-radius: 16px; padding: 48px 40px; text-align: center;
}
.cta-band h2 { color: var(--white); }
.cta-band p { color: #c7cede; max-width: 52ch; margin: 0 auto 26px; }

/* ---------- Footer ---------- */
.site-footer { background: var(--ink); color: #c7cede; padding: 56px 0 28px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
@media (max-width: 720px) { .footer-grid { grid-template-columns: 1fr; } }
.site-footer h5 { font-family: var(--font-mono); color: var(--paper); font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 14px; }
.site-footer a { color: #c7cede; }
.site-footer a:hover { color: var(--white); }
.footer-links { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; font-size: 0.92rem; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.12); padding-top: 22px; font-size: 0.82rem; color: #8b93ab; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; font-family: var(--font-mono); }

/* ---------- Breadcrumb ---------- */
.crumbs { font-family: var(--font-mono); font-size: 0.78rem; color: var(--text-muted); margin-bottom: 18px; }
.crumbs a { color: var(--text-muted); }
.crumbs a:hover { color: var(--signal-dark); }