/* ===== Lojik360 — Design System ===== */
:root {
  --navy: #0a1a2f;
  --navy-2: #102a4c;
  --teal: #2ec4b6;
  --teal-dark: #21998e;
  --amber: #f4a261;
  --red: #e63946;
  --ink: #eaf2fb;
  --ink-dim: #9fb3c8;
  --card: #12233d;
  --border: #1e3a5f;
  --radius: 14px;
  --font-head: "Space Grotesk", sans-serif;
  --font-body: "Inter", sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--navy);
  color: var(--ink);
  line-height: 1.65;
}

h1, h2, h3, h4 { font-family: var(--font-head); line-height: 1.2; }

a { color: var(--teal); text-decoration: none; }
a:hover { color: var(--amber); }

.container { max-width: 1100px; margin: 0 auto; padding: 0 1.25rem; }

/* ===== Header ===== */
header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(10, 26, 47, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.nav {
  display: flex; align-items: center; justify-content: space-between;
  padding: 0.9rem 1.25rem; max-width: 1100px; margin: 0 auto;
}
.logo {
  font-family: var(--font-head); font-weight: 700; font-size: 1.35rem; color: var(--ink);
  display: flex; align-items: center;
}
.logo-img { width: 42px; height: 42px; flex-shrink: 0; margin-right: 0.6rem; }
.logo small { margin-left: 0.6rem; }
.logo span { color: var(--teal); }
.logo small { display: block; font-size: 0.62rem; letter-spacing: 0.18em; color: var(--ink-dim); text-transform: uppercase; }
.nav-links { display: flex; gap: 1.4rem; align-items: center; list-style: none; }
.nav-links a { color: var(--ink-dim); font-size: 0.95rem; font-weight: 500; }
.nav-links a:hover, .nav-links a.active { color: var(--ink); }
.btn {
  display: inline-block; padding: 0.65rem 1.3rem; border-radius: 999px;
  font-weight: 600; font-size: 0.95rem; transition: transform .15s ease, box-shadow .15s ease;
}
.btn-primary { background: var(--teal); color: var(--navy); }
.btn-primary:hover { background: var(--amber); color: var(--navy); transform: translateY(-2px); }
.btn-outline { border: 1.5px solid var(--teal); color: var(--teal); }
.btn-outline:hover { background: var(--teal); color: var(--navy); }
.nav-toggle { display: none; background: none; border: none; color: var(--ink); font-size: 1.6rem; cursor: pointer; }

/* Sélecteur de langue FR / HT / EN */
.lang-switch {
  display: inline-flex; gap: 0.15rem; background: var(--card);
  border: 1px solid var(--border); border-radius: 999px; padding: 0.18rem;
}
.lang-switch button {
  background: none; border: none; color: var(--ink-dim); font-family: var(--font-body);
  font-size: 0.78rem; font-weight: 700; padding: 0.3rem 0.6rem; border-radius: 999px;
  cursor: pointer; letter-spacing: 0.04em;
}
.lang-switch button:hover { color: var(--ink); }
.lang-switch button.active { background: var(--teal); color: var(--navy); }

/* ===== Hero ===== */
.hero {
  padding: 5rem 0 4rem;
  background:
    radial-gradient(ellipse at 20% 0%, rgba(46,196,182,0.14), transparent 50%),
    radial-gradient(ellipse at 90% 100%, rgba(244,162,97,0.10), transparent 50%);
  text-align: center;
}
.hero h1 { font-size: clamp(2rem, 5vw, 3.4rem); margin-bottom: 1rem; }
.hero h1 em { font-style: normal; color: var(--teal); }
.hero .kreyol { color: var(--amber); font-size: 1.15rem; font-style: italic; margin-bottom: 0.6rem; }
.hero p.lead { max-width: 640px; margin: 0 auto 2rem; color: var(--ink-dim); font-size: 1.12rem; }
.hero .cta-row { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

/* ===== Sections ===== */
section { padding: 3.5rem 0; }
.section-head { text-align: center; margin-bottom: 2.5rem; }
.section-head h2 { font-size: 2rem; margin-bottom: 0.5rem; }
.section-head .kreyol { color: var(--amber); font-style: italic; font-size: 0.98rem; }
.section-head p { color: var(--ink-dim); max-width: 600px; margin: 0.5rem auto 0; }

.grid { display: grid; gap: 1.4rem; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

.card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.6rem;
  transition: transform .15s ease, border-color .15s ease;
}
.card:hover { transform: translateY(-4px); border-color: var(--teal); }
.card .icon { font-size: 1.9rem; margin-bottom: 0.8rem; display: block; }
.card h3 { font-size: 1.15rem; margin-bottom: 0.5rem; }
.card p { color: var(--ink-dim); font-size: 0.93rem; }
.card .tag {
  display: inline-block; font-size: 0.72rem; font-weight: 600; letter-spacing: 0.06em;
  text-transform: uppercase; color: var(--teal); background: rgba(46,196,182,0.12);
  padding: 0.2rem 0.65rem; border-radius: 999px; margin-bottom: 0.7rem;
}
.card .tag.amber { color: var(--amber); background: rgba(244,162,97,0.12); }
.card .tag.red { color: #ff8a94; background: rgba(230,57,70,0.14); }
.card .price { font-family: var(--font-head); font-size: 1.4rem; color: var(--amber); margin: 0.6rem 0; }
.card .price small { font-size: 0.8rem; color: var(--ink-dim); font-family: var(--font-body); }
.card .meta { font-size: 0.8rem; color: var(--ink-dim); margin-top: 0.8rem; }
.card .btn { margin-top: 1rem; font-size: 0.88rem; padding: 0.55rem 1.15rem; }

/* ===== Filters ===== */
.filters { display: flex; gap: 0.6rem; justify-content: center; flex-wrap: wrap; margin-bottom: 2rem; }
.filter-btn {
  background: var(--card); border: 1px solid var(--border); color: var(--ink-dim);
  padding: 0.5rem 1.1rem; border-radius: 999px; cursor: pointer; font-size: 0.9rem;
  font-family: var(--font-body); transition: all .15s ease;
}
.filter-btn:hover, .filter-btn.active { background: var(--teal); color: var(--navy); border-color: var(--teal); font-weight: 600; }

/* ===== Podcast episode rows ===== */
.episode {
  display: flex; gap: 1.3rem; align-items: flex-start;
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.4rem; margin-bottom: 1.1rem;
}
.episode .ep-num {
  font-family: var(--font-head); font-size: 1.6rem; font-weight: 700; color: var(--teal);
  min-width: 64px; text-align: center; background: rgba(46,196,182,0.1);
  border-radius: 10px; padding: 0.6rem 0.4rem;
}
.episode .ep-num small { display: block; font-size: 0.6rem; letter-spacing: 0.1em; color: var(--ink-dim); }
.episode h3 { font-size: 1.1rem; margin-bottom: 0.3rem; }
.episode p { color: var(--ink-dim); font-size: 0.92rem; }
.episode .ep-links { margin-top: 0.6rem; display: flex; gap: 0.9rem; font-size: 0.85rem; flex-wrap: wrap; }

.platforms { display: flex; gap: 0.8rem; justify-content: center; flex-wrap: wrap; margin-top: 1.5rem; }
.platforms a {
  border: 1px solid var(--border); border-radius: 999px; padding: 0.5rem 1.2rem;
  font-size: 0.88rem; color: var(--ink-dim); background: var(--card);
}
.platforms a:hover { border-color: var(--teal); color: var(--ink); }

/* ===== Banner / CTA strip ===== */
.banner {
  background: linear-gradient(120deg, var(--navy-2), #16365c);
  border: 1px solid var(--border); border-radius: var(--radius);
  padding: 2.2rem; text-align: center; margin: 2rem 0;
}
.banner h2 { margin-bottom: 0.6rem; }
.banner p { color: var(--ink-dim); max-width: 560px; margin: 0 auto 1.4rem; }

/* ===== Newsletter ===== */
.newsletter-form { display: flex; gap: 0.6rem; justify-content: center; flex-wrap: wrap; }
.newsletter-form input {
  background: var(--navy); border: 1px solid var(--border); border-radius: 999px;
  padding: 0.65rem 1.2rem; color: var(--ink); min-width: 280px; font-family: var(--font-body);
}
.newsletter-form input:focus { outline: none; border-color: var(--teal); }

/* ===== Footer ===== */
footer { border-top: 1px solid var(--border); padding: 2.5rem 0; margin-top: 2rem; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 2rem; }
footer h4 { font-size: 0.95rem; margin-bottom: 0.8rem; color: var(--ink); }
footer ul { list-style: none; }
footer li { margin-bottom: 0.45rem; }
footer a, footer p { color: var(--ink-dim); font-size: 0.88rem; }
.footer-bottom { text-align: center; color: var(--ink-dim); font-size: 0.8rem; margin-top: 2rem; padding-top: 1.5rem; border-top: 1px solid var(--border); }

/* ===== Hero search (format W3Schools, version Atmart) ===== */
.search-form {
  display: flex; gap: 0; max-width: 560px; margin: 0 auto 1.5rem;
  border: 2px solid var(--border); border-radius: 999px; overflow: hidden;
  background: var(--card); transition: border-color .15s ease;
}
.search-form:focus-within { border-color: var(--teal); }
.search-form input {
  flex: 1; background: transparent; border: none; padding: 0.9rem 1.4rem;
  color: var(--ink); font-size: 1rem; font-family: var(--font-body);
}
.search-form input:focus { outline: none; }
.search-form button {
  background: var(--teal); color: var(--navy); border: none; padding: 0 1.6rem;
  font-weight: 700; font-size: 1rem; cursor: pointer; font-family: var(--font-body);
}
.search-form button:hover { background: var(--amber); }

.stats-strip {
  display: flex; gap: 2.2rem; justify-content: center; flex-wrap: wrap;
  margin-top: 1.6rem; color: var(--ink-dim); font-size: 0.92rem;
}
.stats-strip strong { color: var(--ink); }

/* ===== Sections matières (une couleur par sujet) ===== */
.subject {
  border-radius: var(--radius); padding: 2.6rem;
  display: grid; grid-template-columns: 1.1fr 1fr; gap: 2.2rem; align-items: center;
  margin-bottom: 1.6rem; border: 1px solid var(--border);
}
.subject h2 { font-size: 1.9rem; margin-bottom: 0.4rem; }
.subject .tagline { font-size: 1.05rem; margin-bottom: 1rem; color: var(--ink-dim); }
.subject p { color: var(--ink-dim); font-size: 0.95rem; }
.subject .cta-row { display: flex; gap: 0.8rem; margin-top: 1.4rem; flex-wrap: wrap; }
.subject--critique { background: rgba(46,196,182,0.07); }
.subject--critique h2 { color: var(--teal); }
.subject--excel { background: rgba(47,213,115,0.07); }
.subject--excel h2 { color: #2fd573; }
.subject--powerbi { background: rgba(244,162,97,0.07); }
.subject--powerbi h2 { color: var(--amber); }
.subject--python { background: rgba(77,171,247,0.07); }
.subject--python h2 { color: #4dabf7; }
.subject--ia { background: rgba(177,151,252,0.07); }
.subject--ia h2 { color: #b197fc; }

/* Carte d'exemple « Eseye li » (équivalent Try it Yourself) */
.example-card {
  background: var(--navy); border: 1px solid var(--border); border-radius: 12px;
  overflow: hidden; box-shadow: 0 8px 28px rgba(0,0,0,0.35);
}
.example-card .ex-head {
  display: flex; align-items: center; gap: 0.5rem;
  background: var(--navy-2); padding: 0.6rem 1rem;
  font-size: 0.78rem; color: var(--ink-dim); letter-spacing: 0.05em;
}
.example-card .ex-head::before {
  content: "● ● ●"; font-size: 0.55rem; color: var(--border); letter-spacing: 0.2em;
}
.example-card .ex-body { padding: 1.1rem 1.2rem; font-size: 0.88rem; }
.example-card pre {
  font-family: Consolas, "Courier New", monospace; white-space: pre-wrap;
  color: var(--ink); font-size: 0.84rem; line-height: 1.6;
}
.example-card pre .kw { color: #4dabf7; }
.example-card pre .str { color: #2fd573; }
.example-card pre .com { color: var(--ink-dim); }
.example-card .ex-foot { padding: 0.8rem 1.2rem 1.1rem; }
.example-card table { width: 100%; border-collapse: collapse; font-size: 0.82rem; }
.example-card th, .example-card td {
  border: 1px solid var(--border); padding: 0.35rem 0.6rem; text-align: left; color: var(--ink-dim);
}
.example-card th { color: var(--ink); background: var(--navy-2); }

/* Mini graphique en barres (CSS pur) */
.mini-chart { display: grid; gap: 0.45rem; }
.mini-chart .bar-row { display: grid; grid-template-columns: 92px 1fr 52px; gap: 0.6rem; align-items: center; font-size: 0.8rem; color: var(--ink-dim); }
.mini-chart .bar { height: 14px; border-radius: 4px; background: var(--amber); }
.mini-chart .bar.teal { background: var(--teal); }
.mini-chart .bar.dim { background: var(--border); }

/* Badge nouveau (format Exponent) */
.badge-new {
  display: inline-block; background: var(--red); color: #fff; font-size: 0.66rem;
  font-weight: 700; letter-spacing: 0.08em; padding: 0.18rem 0.55rem;
  border-radius: 999px; vertical-align: middle; margin-left: 0.5rem;
}

@media (max-width: 860px) {
  .subject { grid-template-columns: 1fr; padding: 1.8rem; }
}

/* Cartes « bientôt disponible » (pas de lien mort) */
.card.soon { opacity: 0.72; }
.card.soon h3 { color: var(--ink-dim); }
.soon-btn { opacity: 0.55; cursor: not-allowed; pointer-events: none; }

/* ===== Article de tutoriel ===== */
.article { max-width: 780px; margin: 0 auto; padding: 2.5rem 1.25rem 4rem; }
.article .breadcrumb { font-size: 0.85rem; color: var(--ink-dim); margin-bottom: 1.2rem; }
.article h1 { font-size: 2.1rem; margin-bottom: 0.6rem; }
.article .article-meta { color: var(--ink-dim); font-size: 0.9rem; margin-bottom: 2rem; display: flex; gap: 1.4rem; flex-wrap: wrap; }
.article h2 { font-size: 1.45rem; margin: 2.6rem 0 0.9rem; padding-top: 1.2rem; border-top: 1px solid var(--border); }
.article h2 .step-num {
  display: inline-flex; align-items: center; justify-content: center;
  width: 34px; height: 34px; border-radius: 50%; background: var(--teal);
  color: var(--navy); font-size: 1rem; margin-right: 0.7rem; vertical-align: middle;
}
.article h3 { font-size: 1.1rem; margin: 1.6rem 0 0.6rem; }
.article p, .article li { color: var(--ink-dim); font-size: 0.97rem; margin-bottom: 0.9rem; }
.article ul, .article ol { padding-left: 1.4rem; margin-bottom: 1rem; }
.article li { margin-bottom: 0.45rem; }
.article strong, .article b { color: var(--ink); }
.article code {
  font-family: Consolas, "Courier New", monospace; font-size: 0.88em;
  background: var(--card); border: 1px solid var(--border);
  padding: 0.1em 0.45em; border-radius: 6px; color: var(--amber);
}
.article table { width: 100%; border-collapse: collapse; font-size: 0.88rem; margin: 1rem 0 1.4rem; }
.article th, .article td { border: 1px solid var(--border); padding: 0.45rem 0.7rem; text-align: left; color: var(--ink-dim); }
.article th { color: var(--ink); background: var(--card); }

.screenshot {
  border: 2px dashed var(--border); border-radius: 12px; background: var(--card);
  padding: 2.2rem 1.4rem; text-align: center; color: var(--ink-dim);
  font-size: 0.88rem; margin: 1.2rem 0 1.6rem;
}
.screenshot::before { content: "📸"; display: block; font-size: 1.6rem; margin-bottom: 0.5rem; }

.callout {
  border-left: 4px solid var(--teal); background: rgba(46,196,182,0.07);
  border-radius: 0 10px 10px 0; padding: 1rem 1.2rem; margin: 1.2rem 0;
  font-size: 0.93rem; color: var(--ink-dim);
}
.callout.warn { border-left-color: var(--amber); background: rgba(244,162,97,0.07); }
.callout.kreyol-note { border-left-color: var(--red); background: rgba(230,57,70,0.06); }
.callout strong { color: var(--ink); }

details.solution {
  background: var(--card); border: 1px solid var(--border); border-radius: 10px;
  padding: 0.9rem 1.2rem; margin: 0.8rem 0 1.4rem;
}
details.solution summary { cursor: pointer; color: var(--teal); font-weight: 600; font-size: 0.93rem; }
details.solution[open] summary { margin-bottom: 0.7rem; }
details.solution p, details.solution li { font-size: 0.92rem; }

.article .next-prev { display: flex; justify-content: space-between; gap: 1rem; margin-top: 3rem; flex-wrap: wrap; }

/* ===== Lecteur de tutoriel (format bibliothèque : sidebar + contenu) ===== */
.tuto-shell {
  max-width: 1180px; margin: 0 auto; padding: 1.5rem 1.25rem 4rem;
  display: grid; grid-template-columns: 290px 1fr; gap: 2.2rem; align-items: start;
}
.tuto-sidebar {
  position: sticky; top: 1.5rem; max-height: calc(100vh - 3rem); overflow-y: auto;
  border: 1px solid var(--border); border-radius: 14px; background: var(--card);
}
.tuto-sidebar-head {
  background: var(--navy-2); border-radius: 13px 13px 0 0; padding: 1.4rem 1.3rem;
  border-bottom: 1px solid var(--border); text-align: center;
}
.tuto-sidebar-head .ico { font-size: 2.4rem; display: block; line-height: 1; }
.tuto-sidebar-head h2 { font-size: 1.15rem; margin: 0.5rem 0 0.25rem; color: var(--ink); }
.tuto-sidebar-head .lvl { font-size: 0.76rem; color: var(--ink-dim); letter-spacing: 0.04em; }
.tuto-toc { list-style: none; padding: 0.5rem 0 0.8rem; margin: 0; }
.tuto-toc .toc-group {
  font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--ink-dim); padding: 0.9rem 1.3rem 0.35rem; opacity: 0.65;
}
.tuto-toc li a {
  display: block; padding: 0.46rem 1.3rem; font-size: 0.87rem; color: var(--ink-dim);
  border-left: 3px solid transparent; transition: color .12s ease, background .12s ease;
}
.tuto-toc li a::before { content: "●"; font-size: 0.45rem; margin-right: 0.6rem; vertical-align: middle; opacity: 0.45; }
.tuto-toc li a:hover { color: var(--ink); background: rgba(255,255,255,0.03); }
.tuto-toc li a.active {
  color: var(--teal); border-left-color: var(--teal);
  background: rgba(46,196,182,0.08); font-weight: 600;
}
.tuto-toc li a.active::before { opacity: 1; }

.tuto-main { min-width: 0; }
.tuto-main .breadcrumb { font-size: 0.85rem; color: var(--ink-dim); margin-bottom: 1rem; }
.tuto-main > h1 { font-size: 2.05rem; margin-bottom: 0.5rem; }
.tuto-main .article-meta { color: var(--ink-dim); font-size: 0.88rem; margin-bottom: 1.5rem; display: flex; gap: 1.3rem; flex-wrap: wrap; }
.tuto-main section { scroll-margin-top: 1.5rem; padding: 1.6rem 0; border-top: 1px solid var(--border); }
.tuto-main section:first-of-type { border-top: none; padding-top: 0.5rem; }
.tuto-main section h2 { font-size: 1.5rem; margin-bottom: 0.9rem; color: var(--ink); }
.tuto-main section h3 { font-size: 1.12rem; margin: 1.5rem 0 0.6rem; color: var(--ink); }
.tuto-main p, .tuto-main li { color: var(--ink-dim); font-size: 0.98rem; line-height: 1.75; margin-bottom: 0.9rem; }
.tuto-main ul, .tuto-main ol { padding-left: 1.4rem; margin-bottom: 1rem; }
.tuto-main li { margin-bottom: 0.4rem; }
.tuto-main strong { color: var(--ink); }
.tuto-main table { width: 100%; border-collapse: collapse; font-size: 0.9rem; margin: 1rem 0 1.4rem; }
.tuto-main th, .tuto-main td { border: 1px solid var(--border); padding: 0.5rem 0.7rem; text-align: left; color: var(--ink-dim); }
.tuto-main th { color: var(--ink); background: var(--card); }
.tuto-pager { display: flex; justify-content: space-between; gap: 1rem; margin-top: 2.5rem; padding-top: 1.5rem; border-top: 1px solid var(--border); flex-wrap: wrap; }

.tuto-toc-toggle { display: none; }

/* ===== Responsive ===== */
@media (max-width: 860px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .nav-links {
    display: none; position: absolute; top: 100%; left: 0; right: 0;
    background: var(--navy-2); flex-direction: column; padding: 1.2rem; gap: 1rem;
    border-bottom: 1px solid var(--border); z-index: 20;
  }
  .nav-links.open { display: flex; }
  .nav-toggle { display: block; }

  /* Lecteur : la sidebar devient un panneau dépliable */
  .tuto-shell { grid-template-columns: 1fr; gap: 1rem; }
  .tuto-sidebar { position: static; max-height: none; }
  .tuto-toc-toggle {
    display: block; width: 100%; background: var(--navy-2); color: var(--ink);
    border: none; border-top: 1px solid var(--border); padding: 0.8rem;
    font-family: var(--font-body); font-weight: 600; cursor: pointer; font-size: 0.9rem;
  }
  .tuto-toc { display: none; }
  .tuto-toc.open { display: block; }
}
@media (max-width: 560px) {
  .grid-3, .grid-4, .grid-2 { grid-template-columns: 1fr; }
  .episode { flex-direction: column; }
  .footer-grid { grid-template-columns: 1fr; }
}