/* ===== Thème moderne – Réseaux et systèmes CIEL ===== */
:root {
  --c1: #4f46e5; --c2: #06b6d4; --c3: #10b981;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(15,23,42,.06), 0 8px 24px -8px rgba(15,23,42,.18);
  --md-text-font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --md-code-font: ui-monospace, "Cascadia Code", "SF Mono", Menlo, Consolas, monospace;
}
[data-md-color-scheme="default"] {
  --md-primary-fg-color: #4f46e5; --md-primary-fg-color--light: #6366f1; --md-primary-fg-color--dark: #3730a3;
  --md-accent-fg-color: #06b6d4;
  --md-default-bg-color: #fbfbfe;
  --md-typeset-a-color: #4338ca;
  --card-bg: #ffffff; --card-border: #e5e7f3;
}
[data-md-color-scheme="slate"] {
  --md-hue: 232;
  --md-primary-fg-color: #1e1b4b; --md-accent-fg-color: #22d3ee;
  --md-typeset-a-color: #818cf8;
  --card-bg: #1b1d2e; --card-border: #2c2f48;
}

/* En-tête dégradé */
.md-header, .md-tabs { background: linear-gradient(100deg, #3730a3 0%, #4f46e5 55%, #0891b2 100%); }
[data-md-color-scheme="slate"] .md-header, [data-md-color-scheme="slate"] .md-tabs { background: linear-gradient(100deg, #0f0e2a 0%, #1e1b4b 60%, #134e5e 100%); }
.md-header { box-shadow: 0 2px 14px rgba(30,27,75,.35); }
.md-tabs__link { opacity: .8; font-weight: 600; }
.md-tabs__link--active, .md-tabs__link:hover { opacity: 1; }

/* Lecture confortable */
.md-typeset { font-size: .82rem; line-height: 1.75; }
.md-content__inner { margin-bottom: 3rem; }
.md-typeset h1 { font-weight: 800; letter-spacing: -.02em; color: var(--md-default-fg-color); margin-bottom: .6em;
  background: linear-gradient(90deg, var(--c1), var(--c2)); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.md-typeset h2 { font-weight: 700; margin-top: 2.2em; padding: 0 0 .3em; border-bottom: 3px solid transparent;
  border-image: linear-gradient(90deg, var(--c1), var(--c2), transparent) 1; }
.md-typeset h3 { font-weight: 650; color: var(--md-primary-fg-color--light); }
[data-md-color-scheme="slate"] .md-typeset h3 { color: #a5b4fc; }
.md-typeset img { max-width: 100%; height: auto; }
.md-typeset p > img:only-child { display: block; margin: 1rem auto; border-radius: var(--radius); box-shadow: var(--shadow); background: #fff; padding: .4rem; }
.md-typeset kbd { white-space: nowrap; border-radius: 6px; }
.md-typeset code { border-radius: 6px; }
.md-typeset pre > code { border-radius: var(--radius); }
.md-typeset hr { border: 0; height: 2px; background: linear-gradient(90deg, var(--c1), var(--c2), transparent); opacity: .5; margin: 2rem 0; }

/* Encadrés (alertes GitHub) */
.md-typeset .admonition, .md-typeset details {
  font-size: .8rem; border: 0; border-left: 5px solid; border-radius: var(--radius);
  box-shadow: var(--shadow); background: var(--card-bg); overflow: hidden; }
.md-typeset .admonition-title, .md-typeset summary { font-weight: 700; border-radius: 0; }
.md-typeset details > summary { cursor: pointer; }
.md-typeset details:not([open]) { box-shadow: 0 1px 2px rgba(15,23,42,.06); }
/* Questions de compréhension : réponses repliées bien visibles */
.md-typeset details:not(.note):not(.tip):not(.warning):not(.important) { border-left-color: var(--c3); }
.md-typeset details:not(.note):not(.tip):not(.warning):not(.important) > summary { background: color-mix(in srgb, var(--c3) 12%, transparent); }

/* Tableaux */
.md-typeset__table { display: block; }
.md-typeset table:not([class]) { font-size: .76rem; border: 1px solid var(--card-border); border-radius: var(--radius); box-shadow: var(--shadow);
  border-collapse: separate; border-spacing: 0; overflow: hidden; background: var(--card-bg); }
.md-typeset table:not([class]) th { background: linear-gradient(180deg, color-mix(in srgb, var(--c1) 14%, transparent), color-mix(in srgb, var(--c1) 6%, transparent));
  font-weight: 700; color: var(--md-default-fg-color); border-bottom: 2px solid var(--card-border); }
.md-typeset table:not([class]) td { border-top: 1px solid var(--card-border); }
.md-typeset table:not([class]) tbody tr:hover { background: color-mix(in srgb, var(--c2) 8%, transparent); }

/* Pastilles et boutons (ajoutés par extra.js) */
.pill { display: inline-block; padding: .1em .75em; border-radius: 999px; font-weight: 700; font-size: .72rem; white-space: nowrap; }
.pill-g { background: #d1fae5; color: #065f46; } .pill-y { background: #fef3c7; color: #92400e; } .pill-r { background: #fee2e2; color: #991b1b; }
[data-md-color-scheme="slate"] .pill-g { background: #064e3b; color: #a7f3d0; }
[data-md-color-scheme="slate"] .pill-y { background: #78350f; color: #fde68a; }
[data-md-color-scheme="slate"] .pill-r { background: #7f1d1d; color: #fecaca; }
.btn-open { display: inline-block; padding: .25em .9em; border-radius: 999px; font-weight: 700; color: #fff !important;
  background: linear-gradient(90deg, var(--c1), var(--c2)); box-shadow: 0 4px 12px -4px rgba(79,70,229,.6); transition: transform .15s, box-shadow .15s; }
.btn-open:hover { transform: translateY(-1px); box-shadow: 0 8px 18px -6px rgba(79,70,229,.7); }
.soon { opacity: .55; font-style: italic; }

/* Page d'accueil */
.hero { text-align: center; padding: 2.6rem 1.2rem 2.2rem; margin: 0 0 1.8rem; border-radius: 22px; color: #fff;
  background: radial-gradient(circle at 15% 20%, rgba(34,211,238,.45), transparent 45%), radial-gradient(circle at 85% 80%, rgba(16,185,129,.35), transparent 40%),
   linear-gradient(135deg, #312e81, #4f46e5 60%, #0e7490); box-shadow: 0 18px 40px -18px rgba(49,46,129,.7); }
.hero h1 { color: #fff !important; -webkit-text-fill-color: #fff; background: none; font-size: 2.1rem; margin: 0 0 .4rem; }
.hero p { margin: .3rem auto; max-width: 38rem; opacity: .95; font-size: .95rem; }
.hero .hero-btn { display: inline-block; margin: .9rem .3rem 0; padding: .55em 1.3em; border-radius: 999px; font-weight: 700; text-decoration: none;
  background: #fff; color: #3730a3 !important; box-shadow: 0 8px 20px -8px rgba(0,0,0,.5); transition: transform .15s; }
.hero .hero-btn.alt { background: rgba(255,255,255,.16); color: #fff !important; border: 1px solid rgba(255,255,255,.5); }
.hero .hero-btn:hover { transform: translateY(-2px); }

.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1rem; margin: 1.2rem 0; }
.card { position: relative; padding: 1.2rem 1.2rem 1rem; border-radius: var(--radius); background: var(--card-bg); border: 1px solid var(--card-border);
  box-shadow: var(--shadow); transition: transform .18s, box-shadow .18s; overflow: hidden; }
.card::before { content: ""; position: absolute; inset: 0 0 auto 0; height: 5px; background: linear-gradient(90deg, var(--c1), var(--c2)); }
.card:hover { transform: translateY(-4px); box-shadow: 0 16px 34px -14px rgba(79,70,229,.45); }
.card .big { font-size: 2rem; line-height: 1; }
.card h3 { margin: .4rem 0 .2rem; } .card p { margin: .2rem 0; } .card a.go { font-weight: 700; }
.card.green::before { background: linear-gradient(90deg, #10b981, #06b6d4); }
.card.amber::before { background: linear-gradient(90deg, #f59e0b, #10b981); }

.steps { counter-reset: s; display: grid; grid-template-columns: repeat(auto-fit, minmax(150px,1fr)); gap: .8rem; margin: 1rem 0; }
.steps div { counter-increment: s; padding: .8rem; border-radius: var(--radius); background: var(--card-bg); border: 1px solid var(--card-border); font-size: .76rem; }
.steps div::before { content: counter(s); display: inline-flex; width: 1.7rem; height: 1.7rem; margin-bottom: .3rem; align-items: center; justify-content: center;
  border-radius: 50%; color: #fff; font-weight: 800; background: linear-gradient(135deg, var(--c1), var(--c2)); }

@media print { .md-typeset details > * { display: block !important; } .md-header, .md-tabs { background: none; } }

.md-header__button.md-logo img,.md-header__button.md-logo svg{height:1.6rem;width:1.6rem}
.card.violet::before { background: linear-gradient(90deg, #8b5cf6, #ec4899); }

/* Mode projection (bouton dans l'en-tête) : texte ~1,4× plus grand, contenu pleine largeur, panneaux latéraux masqués */
html.projection { font-size: 175% !important; }
html.projection .md-sidebar { display: none; }
html.projection .md-grid { max-width: 72rem; }
html.projection .md-content { margin: 0 auto; }
html.projection .md-typeset { line-height: 1.6; }
#projection-btn[aria-pressed="true"] { background: rgba(255,255,255,.22); border-radius: 8px; }