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

:root {
  --bg:       #08070f;
  --surface:  #0f0d1a;
  --card:     #161227;
  --elevated: #1e1733;
  --border:   #2d1b69;
  --border2:  #3d2a8a;
  --primary:  #7c3aed;
  --primary-h:#9d63f0;
  --accent:   #a855f7;
  --accent-l: #c084fc;
  --text:     #f0ecff;
  --muted:    #b0a8c8;
  --dim:      #6b6090;
  --green:    #34d399;
  --red:      #f87171;
  --yellow:   #fbbf24;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

/* NAV */
nav {
  background: rgba(15,13,26,0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 1px 0 rgba(61,42,138,.4), 0 8px 32px rgba(0,0,0,.35);
}

.nav-container {
  max-width: 1600px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  padding: 0 2rem;
  height: 64px;
  gap: 0.25rem;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  margin-right: 1.5rem;
  flex-shrink: 0;
}

.nav-brand-text {
  font-size: 1.2rem;
  font-weight: 800;
  background: linear-gradient(135deg, #c084fc, #7c3aed);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: 0.3px;
}

.nav-links {
  display: flex;
  list-style: none;
  align-items: center;
  gap: 0.15rem;
  height: 64px;
}

.nav-links > li {
  position: relative;
  height: 100%;
  display: flex;
  align-items: center;
}

.nav-links > li > a {
  color: var(--muted);
  text-decoration: none;
  padding: 0.45rem 0.9rem;
  display: flex;
  align-items: center;
  font-weight: 500;
  font-size: 0.9rem;
  border-radius: 8px;
  transition: color .15s, background .15s;
  gap: 0.3rem;
}

.nav-links > li > a:hover {
  color: var(--text);
  background: rgba(124,58,237,.14);
}

.nav-links > li:hover > a {
  color: var(--text);
  background: rgba(124,58,237,.14);
}

.nav-links > li > a .arrow {
  font-size: 0.6rem;
  transition: transform .2s;
  opacity: .5;
  margin-top: 1px;
}

.nav-links > li:hover > a .arrow { transform: rotate(180deg); }

/* Pont invisible entre le lien et le dropdown pour ne pas perdre le hover */
.nav-links > li::after {
  content: '';
  position: absolute;
  top: 100%;
  left: -16px;
  right: -16px;
  height: 14px;
  display: none;
}
.nav-links > li:hover::after { display: block; }

/* DROPDOWN */
.dropdown {
  position: absolute;
  top: calc(100% + 10px);
  left: 50%;
  transform: translateX(-50%) translateY(-6px);
  background: var(--card);
  border: 1px solid var(--border2);
  border-radius: 12px;
  min-width: 240px;
  box-shadow: 0 16px 48px rgba(0,0,0,.55), 0 0 0 1px rgba(124,58,237,.1);
  flex-direction: column;
  padding: 0.4rem;
  gap: 0;
  opacity: 0;
  pointer-events: none;
  display: flex;
  transition: opacity .15s ease, transform .15s ease;
}

.nav-links > li:hover .dropdown {
  opacity: 1;
  pointer-events: all;
  transform: translateX(-50%) translateY(0);
}

.dropdown a {
  color: var(--muted);
  text-decoration: none;
  padding: 0.6rem 0.75rem;
  border-radius: 8px;
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  transition: color .12s, background .12s;
}

.dropdown a:hover {
  color: var(--text);
  background: rgba(124,58,237,.12);
}

.dropdown-icon {
  font-size: 1.3rem;
  line-height: 1;
  flex-shrink: 0;
  margin-top: 1px;
}

.dropdown-text { display: flex; flex-direction: column; gap: 0.15rem; }
.dropdown-title { font-size: 0.88rem; font-weight: 600; color: var(--text); line-height: 1.2; }
.dropdown-desc  { font-size: 0.75rem; color: var(--dim); line-height: 1.3; }

/* HERO */
/* ══ HOME PAGE ═══════════════════════════════════════════════════════ */

/* Hero */
.home-hero {
  position: relative;
  overflow: hidden;
  padding: 7rem 2rem 5rem;
  text-align: center;
}

.home-hero-glow {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 50% -10%, rgba(124,58,237,.22) 0%, transparent 65%),
    radial-gradient(ellipse 40% 40% at 80% 60%, rgba(168,85,247,.08) 0%, transparent 60%);
  pointer-events: none;
}

.home-hero-inner {
  position: relative;
  max-width: 740px;
  margin: 0 auto;
}

.home-hero-badge {
  display: inline-block;
  background: rgba(124,58,237,.15);
  border: 1px solid rgba(124,58,237,.35);
  color: var(--accent-l);
  border-radius: 99px;
  padding: 0.35rem 1rem;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: .5px;
  margin-bottom: 1.75rem;
}

.home-hero-title {
  font-size: clamp(2.4rem, 6vw, 4rem);
  font-weight: 900;
  line-height: 1.1;
  color: var(--text);
  letter-spacing: -1.5px;
  margin-bottom: 1.25rem;
}

.home-hero-accent {
  background: linear-gradient(135deg, #c084fc 0%, #7c3aed 60%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.home-hero-sub {
  font-size: 1.1rem;
  color: var(--muted);
  line-height: 1.7;
  max-width: 580px;
  margin: 0 auto 2.5rem;
}

.home-hero-cta {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.home-cta-primary {
  background: linear-gradient(135deg, #7c3aed, #a855f7);
  color: white;
  text-decoration: none;
  border-radius: 10px;
  padding: 0.8rem 1.8rem;
  font-weight: 700;
  font-size: 0.95rem;
  transition: opacity .15s, transform .15s;
  box-shadow: 0 4px 20px rgba(124,58,237,.4);
}
.home-cta-primary:hover { opacity: .88; transform: translateY(-1px); }

.home-cta-secondary {
  color: var(--accent-l);
  text-decoration: none;
  border-radius: 10px;
  padding: 0.8rem 1.8rem;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid var(--border2);
  background: rgba(124,58,237,.08);
  transition: background .15s, border-color .15s;
}
.home-cta-secondary:hover { background: rgba(124,58,237,.16); border-color: var(--accent); }

/* Stats */
.home-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 1.5rem 2rem;
  flex-wrap: wrap;
}

.home-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0 2.5rem;
}

.home-stat-n {
  font-size: 1.8rem;
  font-weight: 800;
  background: linear-gradient(135deg, #c084fc, #7c3aed);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 0.2rem;
}

.home-stat-l {
  font-size: 0.75rem;
  color: var(--dim);
  font-weight: 500;
  letter-spacing: .5px;
  text-transform: uppercase;
}

.home-stat-sep {
  width: 1px;
  height: 32px;
  background: var(--border);
  flex-shrink: 0;
}

/* Sections communes */
.home-section {
  padding: 5rem 2rem;
}

.home-section--alt {
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.home-section-inner {
  max-width: 1100px;
  margin: 0 auto;
}

.home-section-head {
  text-align: center;
  margin-bottom: 3rem;
}

.home-section-head h2 {
  font-size: 1.9rem;
  font-weight: 800;
  color: var(--text);
  margin-bottom: 0.6rem;
  letter-spacing: -.5px;
}

.home-section-head p {
  color: var(--muted);
  font-size: 1rem;
  max-width: 540px;
  margin: 0 auto;
  line-height: 1.65;
}

/* Catalog */
.cat-block { margin-bottom: 3rem; }
.cat-block:last-child { margin-bottom: 0; }

.cat-label {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 0.3rem 0.8rem;
  border-radius: 6px;
  display: inline-block;
  margin-bottom: 1.25rem;
}

.cat-label--dev    { background: rgba(124,58,237,.15); color: var(--accent-l); border: 1px solid rgba(124,58,237,.3); }
.cat-label--sys    { background: rgba(6,182,212,.12);  color: #67e8f9;          border: 1px solid rgba(6,182,212,.3); }
.cat-label--devops { background: rgba(245,158,11,.12); color: #fcd34d;          border: 1px solid rgba(245,158,11,.3); }

.catalog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
}

.course-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.5rem;
  cursor: pointer;
  transition: border-color .2s, transform .15s, box-shadow .2s;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.course-card:hover {
  border-color: var(--primary);
  transform: translateY(-3px);
  box-shadow: 0 12px 40px rgba(124,58,237,.18);
}

.course-card--labs { border-color: rgba(6,182,212,.25); }
.course-card--labs:hover { border-color: #06b6d4; box-shadow: 0 12px 40px rgba(6,182,212,.12); }

.course-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.course-card-icon { font-size: 1.8rem; line-height: 1; }

.course-card-chapters {
  font-size: 0.72rem;
  color: var(--dim);
  font-weight: 600;
  background: var(--elevated);
  border-radius: 99px;
  padding: 0.2rem 0.7rem;
}

.course-card-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.3;
}

.course-card-desc {
  font-size: 0.84rem;
  color: var(--muted);
  line-height: 1.6;
}

.course-card-topics {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  flex: 1;
}

.course-card-topics li {
  font-size: 0.8rem;
  color: var(--dim);
  padding-left: 0.9rem;
  position: relative;
}

.course-card-topics li::before {
  content: '›';
  position: absolute;
  left: 0;
  color: var(--primary);
  font-weight: 700;
}

.course-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 0.5rem;
  gap: 0.5rem;
}

.course-card-prereq {
  font-size: 0.72rem;
  color: var(--dim);
}

.course-card-lab-badge {
  font-size: 0.72rem;
  color: #67e8f9;
  background: rgba(6,182,212,.1);
  border: 1px solid rgba(6,182,212,.25);
  border-radius: 99px;
  padding: 0.2rem 0.6rem;
}

.course-card-btn {
  background: rgba(124,58,237,.18);
  border: 1px solid var(--border2);
  color: var(--accent-l);
  border-radius: 7px;
  padding: 0.4rem 0.9rem;
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  transition: background .15s;
  margin-left: auto;
  flex-shrink: 0;
}
.course-card-btn:hover { background: rgba(124,58,237,.35); }

/* Features */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: 1.25rem;
}

.feature-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.75rem 1.5rem;
}

.feature-icon {
  font-size: 2rem;
  margin-bottom: 0.75rem;
}

.feature-card h3 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.5rem;
}

.feature-card p {
  font-size: 0.84rem;
  color: var(--muted);
  line-height: 1.65;
}

/* Path */
.path-steps {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
  max-width: 560px;
  margin: 0 auto;
}

.path-step {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.1rem 1.25rem;
  cursor: pointer;
  width: 100%;
  transition: border-color .2s, background .2s;
}

.path-step:hover {
  border-color: var(--primary);
  background: rgba(124,58,237,.06);
}

.path-step-body {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.path-step-num {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: white;
  font-size: 0.78rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.path-step-icon { font-size: 1.5rem; flex-shrink: 0; }

.path-step-title {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.15rem;
}

.path-step-desc {
  font-size: 0.8rem;
  color: var(--muted);
}

.path-connector {
  color: var(--dim);
  font-size: 1.1rem;
  padding: 0.3rem 0;
  line-height: 1;
}

/* PAGE CONTENT */
/* page-content est géré dans le contexte de #course-main */
.page-content { display: none; }
.page-content.active { display: block; }

.page-header { margin-bottom: 2.5rem; padding-bottom: 1.5rem; border-bottom: 1px solid var(--border); }
.page-header .breadcrumb { font-size: 0.82rem; color: var(--dim); margin-bottom: 0.6rem; }
.page-header .breadcrumb a { color: var(--accent); text-decoration: none; }
.page-header h2 {
  font-size: 1.9rem;
  font-weight: 800;
  color: #ffffff;
}
.page-header p { color: var(--muted); margin-top: 0.5rem; line-height: 1.6; }
.page-header-sub { margin-top: 1rem !important; padding-top: 0.9rem; border-top: 1px solid var(--border); font-size: 0.9rem; }

/* SECTIONS */
.section {
  margin-bottom: 0;
  background: transparent;
  border: none;
  border-top: 1px solid rgba(45,27,105,.45);
  border-radius: 0;
}

/* Pas de séparateur avant la toute première section */
.page-header + .section {
  border-top: none;
  margin-top: 1.5rem;
}

.section-header {
  padding: 1.5rem 0 0.8rem;
  background: transparent;
  border-bottom: none;
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.section-header h3 { font-size: 1.05rem; font-weight: 700; color: #ffffff; }
.section-icon { font-size: 1.1rem; }
.section-body { padding: 0 0 1.75rem; }
.section-body p { color: #cdc8de; line-height: 1.75; margin-bottom: 1rem; }
.section-body p:last-child { margin-bottom: 0; }
.section-body strong { color: #f0ecff; }

/* CODE */
pre {
  background: #05040d;
  border: 1px solid rgba(61,42,138,.6);
  border-radius: 8px;
  padding: 1.25rem;
  overflow-x: auto;
  margin: 1rem 0;
}

code {
  font-family: 'Cascadia Code','Fira Code','Consolas',monospace;
  font-size: 0.875rem;
  line-height: 1.65;
  color: var(--text);
}

.inline-code {
  background: var(--elevated);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.1em 0.45em;
  font-family: 'Cascadia Code','Fira Code','Consolas',monospace;
  font-size: 0.84em;
  color: var(--accent-l);
}

/* Syntax colors */
.kw   { color: #f472b6; }
.str  { color: #a5f3fc; }
.num  { color: #93c5fd; }
.cmt  { color: #6b7280; font-style: italic; }
.fn   { color: #c084fc; }
.cls  { color: #fb923c; }
.var  { color: var(--text); }
.op   { color: #f472b6; }
.bool { color: #93c5fd; }
.prop { color: #93c5fd; }
.cmd  { color: #86efac; }
.flag { color: #fbbf24; }
.param{ color: #a5f3fc; }
.comment-bash { color: #6b7280; font-style: italic; }

/* TABLES */
table { width: 100%; border-collapse: collapse; margin: 1rem 0; font-size: 0.88rem; }
th {
  background: var(--elevated);
  color: var(--accent-l);
  padding: 0.7rem 1rem;
  text-align: left;
  font-weight: 600;
  border-bottom: 2px solid var(--border2);
}
td { padding: 0.6rem 1rem; border-bottom: 1px solid rgba(45,27,105,.4); color: var(--muted); }
tr:last-child td { border-bottom: none; }
tr:hover td { background: rgba(124,58,237,.06); }

/* TIPS */
.tip {
  background: rgba(124,58,237,.1);
  border-left: 3px solid var(--primary);
  border-radius: 0 8px 8px 0;
  padding: 0.9rem 1.2rem;
  margin: 1rem 0;
  font-size: 0.88rem;
  color: var(--muted);
  line-height: 1.6;
}
.tip strong { color: var(--accent-l); }

.warning {
  background: rgba(248,113,113,.08);
  border-left: 3px solid var(--red);
  border-radius: 0 8px 8px 0;
  padding: 0.9rem 1.2rem;
  margin: 1rem 0;
  font-size: 0.88rem;
  color: var(--muted);
}
.warning strong { color: var(--red); }

.savais-tu {
  background: rgba(20,184,166,.08);
  border-left: 3px solid #14b8a6;
  border-radius: 0 8px 8px 0;
  padding: 0.9rem 1.2rem;
  margin: 1rem 0;
  font-size: 0.88rem;
  color: var(--muted);
  line-height: 1.6;
}
.savais-tu::before {
  content: "💡 Le savais-tu ?";
  display: block;
  font-weight: 700;
  color: #2dd4bf;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.45rem;
}
.savais-tu strong { color: #2dd4bf; }

.exemple {
  background: rgba(251,191,36,.06);
  border-left: 3px solid var(--yellow);
  border-radius: 0 8px 8px 0;
  padding: 0.9rem 1.2rem;
  margin: 1rem 0;
  font-size: 0.88rem;
  color: var(--muted);
  line-height: 1.6;
}
.exemple::before {
  content: "📌 Exemple";
  display: block;
  font-weight: 700;
  color: var(--yellow);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.45rem;
}
.exemple strong { color: var(--yellow); }

/* TERMINAL LAB */
.lab-box {
  margin-top: 2rem;
  border: 1px solid var(--border2);
  border-radius: 12px;
  overflow: hidden;
  background: #04030a;
}

.lab-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.7rem 1.2rem;
  background: var(--elevated);
  border-bottom: 1px solid var(--border2);
}

.lab-title { font-size: 0.88rem; font-weight: 700; color: var(--accent-l); }

.lab-reset {
  background: rgba(124,58,237,.2);
  border: 1px solid var(--border2);
  color: var(--accent-l);
  border-radius: 6px;
  padding: 0.25rem 0.75rem;
  font-size: 0.78rem;
  cursor: pointer;
  transition: background .15s;
}
.lab-reset:hover { background: rgba(124,58,237,.35); }

.term-wrapper { display: flex; flex-direction: column; height: 360px; }

.term-titlebar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55rem 1rem;
  background: #0d0b18;
  border-bottom: 1px solid rgba(61,42,138,.3);
}

.term-dot {
  width: 12px; height: 12px;
  border-radius: 50%;
  display: inline-block;
}

.term-label {
  font-size: 0.78rem;
  color: var(--dim);
  margin-left: 0.5rem;
  font-family: 'Cascadia Code','Fira Code','Consolas',monospace;
}

.term-output {
  flex: 1;
  overflow-y: auto;
  padding: 0.75rem 1rem;
  font-family: 'Cascadia Code','Fira Code','Consolas',monospace;
  font-size: 0.82rem;
  line-height: 1.55;
  background: #04030a;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}

.term-output > div { min-height: 1.3em; white-space: pre-wrap; word-break: break-word; }

.term-input-row {
  display: flex;
  align-items: center;
  padding: 0.5rem 1rem;
  background: #04030a;
  border-top: 1px solid rgba(61,42,138,.3);
  gap: 0;
}

.term-ps1 {
  font-family: 'Cascadia Code','Fira Code','Consolas',monospace;
  font-size: 0.82rem;
  white-space: nowrap;
  flex-shrink: 0;
}

.term-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text);
  font-family: 'Cascadia Code','Fira Code','Consolas',monospace;
  font-size: 0.82rem;
  caret-color: var(--accent-l);
}

/* Terminal text classes */
.t-user  { color: #86efac; }
.t-path  { color: #93c5fd; }
.t-cmd   { color: var(--text); }
.t-txt   { color: #d4cfed; }
.t-info  { color: #a78bfa; }
.t-err   { color: #f87171; }
.t-ok    { color: #34d399; }
.t-dir   { color: #93c5fd; font-weight: 600; }
.t-match { background: rgba(251,191,36,.25); color: #fbbf24; border-radius: 2px; }
.t-line-num { color: var(--dim); }
.t-cmd-hl { color: #86efac; display: inline-block; }
.t-challenge { color: var(--muted); }
.t-done { color: var(--green); }
.t-win  { color: #fbbf24; font-weight: 700; font-size: 1.05em; }

/* FOOTER */
footer {
  border-top: 1px solid rgba(45,27,105,.5);
  margin-top: 3rem;
  background: var(--surface);
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 2.5rem;
  display: flex;
  align-items: center;
  gap: 2rem;
  flex-wrap: wrap;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-right: auto;
}

.footer-logo {
  font-size: 0.9rem;
  font-weight: 800;
  color: var(--primary);
  font-family: 'Cascadia Code', 'Fira Code', monospace;
}

.footer-name {
  font-weight: 700;
  font-size: 0.88rem;
  color: var(--muted);
}

.footer-links {
  display: flex;
  gap: 1.5rem;
}

.footer-links a {
  color: var(--dim);
  text-decoration: none;
  font-size: 0.82rem;
  transition: color .15s;
}

.footer-links a:hover { color: var(--accent-l); }

.footer-copy {
  color: var(--dim);
  font-size: 0.78rem;
  white-space: nowrap;
}

/* RESPONSIVE */

@media (min-width: 1400px) {
  #course-layout { grid-template-columns: 280px 1fr; }
  #course-main .page-content { max-width: 1500px; }
}

@media (max-width: 1100px) {
  #course-layout { grid-template-columns: 240px 1fr; }
  #course-main .page-content { max-width: 960px; }
  #course-main { padding: 0 1.25rem; }
}

@media (max-width: 900px) {
  #course-layout { grid-template-columns: 220px 1fr; }
  #course-main { padding: 0 1rem; }
}

@media (max-width: 768px) {
  .nav-container { padding: 0 1rem; }
  .nav-brand-text { font-size: 1rem; }
  .nav-links > li > a { padding: 0 0.6rem; font-size: 0.85rem; }
  .term-wrapper { height: 320px; }
  .home-hero { padding: 4rem 1.25rem 3rem; }
  .home-stat { padding: 0 1.25rem; }
  .home-section { padding: 3rem 1.25rem; }
  .catalog-grid { grid-template-columns: 1fr; }
  .features-grid { grid-template-columns: 1fr; }

  /* Sidebar passe au-dessus du contenu sur mobile */
  #course-layout {
    grid-template-columns: 1fr;
    grid-template-rows: auto 1fr;
  }
  #course-sidebar {
    position: static;
    height: auto;
    border-right: none;
    border-bottom: 1px solid var(--border);
  }
  #course-main {
    padding: 0;
  }
  #course-main .page-content {
    margin: 0;
    padding: 1.75rem 1.25rem;
    border-radius: 0;
    border-left: none;
    border-right: none;
    border-top: none;
  }
}

/* NAV USER SECTION */
.nav-auth {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.btn-nav-login {
  background: rgba(124,58,237,.2);
  border: 1px solid var(--border2);
  color: var(--accent-l);
  border-radius: 8px;
  padding: 0.4rem 1rem;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: background .15s;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}
.btn-nav-login:hover { background: rgba(124,58,237,.4); }

.nav-user-section {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.nav-avatar {
  width: 32px; height: 32px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 700;
  color: white;
  flex-shrink: 0;
}

.nav-username {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text);
}

.btn-logout {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
  border-radius: 6px;
  padding: 0.3rem 0.75rem;
  font-size: 0.78rem;
  cursor: pointer;
  transition: color .15s, border-color .15s;
}
.btn-logout:hover { color: var(--red); border-color: var(--red); }

/* AUTH MODAL */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(8,7,15,.88);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 3000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.modal-box {
  background: var(--card);
  border: 1px solid var(--border2);
  border-radius: 16px;
  width: 420px;
  max-width: 100%;
  box-shadow: 0 24px 64px rgba(0,0,0,.7);
  overflow: hidden;
  animation: modal-in .18s ease;
}

@keyframes modal-in {
  from { opacity: 0; transform: scale(.95) translateY(10px); }
  to   { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.4rem 1.6rem 0;
}

.modal-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 800;
  font-size: 1.1rem;
  background: linear-gradient(135deg, #c084fc, #7c3aed);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.modal-close {
  background: none;
  border: none;
  color: var(--muted);
  font-size: 1.3rem;
  cursor: pointer;
  line-height: 1;
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
  transition: color .15s, background .15s;
}
.modal-close:hover { color: var(--text); background: var(--elevated); }

.modal-tabs {
  display: flex;
  gap: 0;
  margin: 1.2rem 1.6rem 0;
  border-bottom: 1px solid var(--border);
}

.modal-tab {
  background: none;
  border: none;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0.6rem 1.2rem;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: color .15s, border-color .15s;
}
.modal-tab:hover { color: var(--text); }
.modal-tab.active { color: var(--accent-l); border-bottom-color: var(--accent); }

.modal-form {
  padding: 1.4rem 1.6rem 1.8rem;
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.form-group label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--muted);
  letter-spacing: .3px;
}

.form-input {
  background: var(--elevated);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.65rem 0.9rem;
  color: var(--text);
  font-size: 0.9rem;
  outline: none;
  transition: border-color .15s, box-shadow .15s;
  font-family: inherit;
}
.form-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(124,58,237,.15);
}
.form-input::placeholder { color: var(--dim); }

.auth-error {
  font-size: 0.82rem;
  color: var(--red);
  min-height: 1.2em;
  text-align: center;
}

.btn-primary {
  background: linear-gradient(135deg, #7c3aed, #a855f7);
  border: none;
  color: white;
  border-radius: 8px;
  padding: 0.7rem;
  font-size: 0.9rem;
  font-weight: 700;
  cursor: pointer;
  transition: opacity .15s, transform .1s;
  margin-top: 0.25rem;
}
.btn-primary:hover   { opacity: .9; }
.btn-primary:active  { transform: scale(.98); }
.btn-primary:disabled { opacity: .5; cursor: not-allowed; }

.modal-footer {
  font-size: 0.8rem;
  color: var(--muted);
  text-align: center;
  margin-top: 0.25rem;
}
.modal-footer a {
  color: var(--accent-l);
  cursor: pointer;
  text-decoration: none;
  font-weight: 600;
}
.modal-footer a:hover { text-decoration: underline; }

/* LAB CHALLENGES PANEL */
.lab-challenges {
  padding: 0.85rem 1.25rem;
  background: rgba(0,0,0,.25);
  border-bottom: 1px solid rgba(61,42,138,.35);
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.lab-challenges-title {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--dim);
  margin-bottom: 0.15rem;
}

.lab-ch-item {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  font-size: 0.82rem;
  color: var(--muted);
  line-height: 1.4;
  transition: color .2s;
}

.lab-ch-bullet {
  color: var(--dim);
  flex-shrink: 0;
  font-size: 0.85rem;
  margin-top: 0.05rem;
  transition: color .2s;
  font-family: 'Cascadia Code', monospace;
}

.lab-ch-item.done {
  color: var(--green);
}

.lab-ch-item.done .lab-ch-bullet {
  color: var(--green);
  font-weight: 700;
}

.lab-ch-item.masked {
  color: var(--dim);
  font-style: italic;
  opacity: 0.5;
}

.lab-ch-item.masked .lab-ch-bullet {
  color: var(--dim);
}

.lab-challenges-done {
  margin-top: 0.4rem;
  padding-top: 0.5rem;
  border-top: 1px solid rgba(52,211,153,.2);
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--green);
}

/* LAB AUTH GATE */
.lab-box { position: relative; }

.lab-auth-gate {
  position: absolute;
  inset: 0;
  background: rgba(8,7,15,.88);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 5;
}

.lab-gate-inner {
  text-align: center;
  padding: 2rem;
  max-width: 340px;
}

.lab-gate-icon {
  font-size: 2.5rem;
  display: block;
  margin-bottom: 0.75rem;
}

.lab-gate-inner h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.5rem;
}

.lab-gate-inner p {
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 1.25rem;
  line-height: 1.6;
}

.lab-gate-btns {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  flex-wrap: wrap;
}

.btn-gate-primary {
  background: linear-gradient(135deg, #7c3aed, #a855f7);
  border: none;
  color: white;
  border-radius: 8px;
  padding: 0.55rem 1.2rem;
  font-size: 0.85rem;
  font-weight: 700;
  cursor: pointer;
  transition: opacity .15s;
}
.btn-gate-primary:hover { opacity: .88; }

.btn-gate-secondary {
  background: rgba(124,58,237,.15);
  border: 1px solid var(--border2);
  color: var(--accent-l);
  border-radius: 8px;
  padding: 0.55rem 1.2rem;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: background .15s;
}
.btn-gate-secondary:hover { background: rgba(124,58,237,.3); }

/* COURSE LAYOUT */
#course-layout {
  display: none;
  grid-template-columns: 260px 1fr;
  min-height: calc(100vh - 62px);
  align-items: start;
}

/* SIDEBAR */
#course-sidebar {
  background: var(--bg);
  position: sticky;
  top: 62px;
  height: calc(100vh - 62px);
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
  /* Séparateur élégant : gradient vertical + ombre */
  box-shadow: inset -1px 0 0 rgba(61,42,138,.5), 4px 0 24px rgba(0,0,0,.25);
}

.sidebar-header {
  padding: 1.5rem 1.25rem 1.25rem;
  border-bottom: 1px solid rgba(45,27,105,.4);
  background: linear-gradient(180deg, rgba(124,58,237,.06) 0%, transparent 100%);
}

.sidebar-back {
  background: none;
  border: none;
  color: var(--dim);
  font-size: 0.75rem;
  cursor: pointer;
  padding: 0;
  margin-bottom: 1.1rem;
  display: flex;
  align-items: center;
  gap: 0.35rem;
  transition: color .15s;
  letter-spacing: .3px;
}
.sidebar-back:hover { color: var(--accent-l); }

.sidebar-course-badge {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  background: linear-gradient(135deg, rgba(124,58,237,.16), rgba(168,85,247,.07));
  border: 1px solid rgba(124,58,237,.3);
  border-radius: 10px;
  padding: 0.65rem 0.9rem;
  margin-bottom: 0.9rem;
}

.sidebar-course-icon { font-size: 1.3rem; flex-shrink: 0; }

.sidebar-course-title {
  font-size: 0.88rem;
  font-weight: 700;
  color: #ffffff;
  line-height: 1.4;
}

.sidebar-progress-wrap {
  margin-top: 0.85rem;
}

.sidebar-progress-label {
  font-size: 0.68rem;
  color: var(--dim);
  margin-bottom: 0.4rem;
  letter-spacing: .4px;
  text-transform: uppercase;
}

.sidebar-progress-bar-bg {
  height: 3px;
  background: rgba(45,27,105,.5);
  border-radius: 99px;
  overflow: hidden;
}

.sidebar-progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: 99px;
  transition: width .4s ease;
}

.sidebar-nav {
  padding: 0.75rem 0;
  display: flex;
  flex-direction: column;
}

.sidebar-item {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.65rem 1.25rem;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.83rem;
  transition: color .15s, background .15s;
  border-left: 2px solid transparent;
  position: relative;
}
.sidebar-item:hover {
  color: #ddd8ee;
  background: rgba(124,58,237,.07);
  border-left-color: rgba(124,58,237,.45);
}
.sidebar-item.active {
  color: #ffffff;
  background: rgba(124,58,237,.16);
  border-left-color: var(--primary);
  font-weight: 600;
}

.sidebar-num {
  background: rgba(45,27,105,.55);
  border: 1px solid rgba(61,42,138,.4);
  color: var(--dim);
  font-size: 0.65rem;
  font-weight: 700;
  width: 20px; height: 20px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background .15s, color .15s, border-color .15s;
}
.sidebar-item:hover .sidebar-num  { background: rgba(124,58,237,.2); color: var(--text); border-color: rgba(124,58,237,.4); }
.sidebar-item.active .sidebar-num { background: var(--primary); color: white; border-color: var(--primary); }
.sidebar-item-label { flex: 1; line-height: 1.35; }

/* COURSE MAIN */
#course-main {
  min-width: 0;
  padding: 0 2rem;
}

#course-main .page-content {
  max-width: 1320px;
  width: 100%;
  margin: 1rem auto 3rem;
  padding: 2.5rem clamp(2rem, 5vw, 5rem);
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
}

/* ATELIERS (quiz + fiddle) */
.atelier-box {
  margin-top: 2rem;
  border: 1px solid rgba(124,58,237,.3);
  border-radius: 12px;
  overflow: hidden;
  background: rgba(124,58,237,.04);
}

.atelier-header {
  display: flex;
  align-items: center;
  gap: .6rem;
  padding: .8rem 1.25rem;
  background: rgba(124,58,237,.12);
  border-bottom: 1px solid rgba(124,58,237,.2);
}

.atelier-header h3 {
  margin: 0;
  font-size: .95rem;
  font-weight: 700;
  color: var(--accent-l);
}

.atelier-gate {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

.atelier-gate-inner {
  text-align: center;
}

.atelier-gate-inner .gate-icon { font-size: 2rem; display: block; margin-bottom: .5rem; }
.atelier-gate-inner p { color: var(--dim); margin: .4rem 0 1rem; }
.atelier-gate-btns { display: flex; gap: .6rem; justify-content: center; flex-wrap: wrap; }
.atelier-gate-btns button {
  padding: .45rem 1rem;
  border-radius: 6px;
  border: none;
  cursor: pointer;
  font-size: .85rem;
  font-weight: 600;
}
.btn-gate-p { background: var(--primary); color: #fff; }
.btn-gate-s { background: transparent; border: 1px solid var(--border) !important; color: var(--text); }

.atelier-done-badge {
  margin-left: auto;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--green);
  background: rgba(52,211,153,.12);
  border: 1px solid rgba(52,211,153,.3);
  border-radius: 99px;
  padding: 0.2rem 0.65rem;
  white-space: nowrap;
  flex-shrink: 0;
}

.atelier-body { display: none; padding: 1.5rem; }

/* Quiz */
.quiz-q { margin-bottom: 1.4rem; }
.quiz-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px; height: 22px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  font-size: .75rem;
  font-weight: 700;
  margin-right: .4rem;
  flex-shrink: 0;
}
.quiz-q-text { font-weight: 600; margin-bottom: .6rem; display: flex; align-items: baseline; gap: .3rem; }
.quiz-opts { display: flex; flex-direction: column; gap: .4rem; }
.quiz-opt {
  display: flex;
  align-items: center;
  gap: .5rem;
  padding: .5rem .8rem;
  border-radius: 7px;
  border: 1px solid var(--border);
  cursor: pointer;
  transition: background .15s, border-color .15s;
  font-size: .9rem;
}
.quiz-opt:hover { background: rgba(124,58,237,.08); border-color: var(--primary); }
.quiz-opt input { accent-color: var(--primary); flex-shrink: 0; }
.quiz-opt.quiz-correct { background: rgba(52,211,153,.12); border-color: var(--green); color: var(--green); }
.quiz-opt.quiz-wrong   { background: rgba(239,68,68,.1);  border-color: #ef4444;     color: #ef4444; }
.quiz-actions { display: flex; align-items: center; gap: 1rem; flex-wrap: wrap; margin-top: .5rem; }
.btn-quiz {
  padding: .5rem 1.25rem;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 7px;
  font-weight: 600;
  cursor: pointer;
  font-size: .9rem;
  transition: opacity .15s;
}
.btn-quiz:hover { opacity: .85; }
.quiz-score { font-size: .95rem; font-weight: 600; color: var(--green); }
.quiz-warn  { font-size: .85rem; color: #f59e0b; }

.fiddle-validate-row { display: flex; align-items: center; gap: 1rem; padding: 1rem 0 0; flex-wrap: wrap; }
.fiddle-errors { display: flex; flex-direction: column; gap: .35rem; }
.fiddle-err { font-size: .85rem; color: var(--red, #ef4444); }

/* Fiddle */
.fiddle-consigne {
  background: rgba(124,58,237,.06);
  border-left: 3px solid var(--primary);
  padding: .6rem .9rem;
  border-radius: 0 7px 7px 0;
  font-size: .9rem;
  margin-bottom: 1rem;
}
.fiddle-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  min-height: 220px;
}
@media (max-width: 700px) { .fiddle-split { grid-template-columns: 1fr; } }
.fiddle-pane { display: flex; flex-direction: column; border-radius: 8px; overflow: hidden; border: 1px solid var(--border); }
.fiddle-pane-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: .35rem .7rem;
  background: rgba(0,0,0,.25);
  font-size: .78rem;
  font-weight: 700;
  color: var(--dim);
  letter-spacing: .5px;
  text-transform: uppercase;
}
.btn-run {
  padding: .25rem .7rem;
  background: var(--green);
  color: #08070f;
  border: none;
  border-radius: 4px;
  font-weight: 700;
  font-size: .78rem;
  cursor: pointer;
}
.fiddle-textarea {
  flex: 1;
  background: #0d0c18;
  color: #e2e0f0;
  font-family: 'Cascadia Code', 'Fira Code', monospace;
  font-size: .85rem;
  padding: .75rem;
  border: none;
  resize: none;
  min-height: 180px;
  outline: none;
  tab-size: 2;
}
.fiddle-iframe {
  flex: 1;
  background: #fff;
  border: none;
  min-height: 180px;
}

/* STANDALONE PAGES */
#profile-page {
  display: none;
  max-width: 920px;
  margin: 0 auto;
  padding: 3rem 2rem;
}

/* NAV PROFILE LINK */
.btn-nav-profile {
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 500;
  text-decoration: none;
  padding: 0.3rem 0.6rem;
  border-radius: 6px;
  transition: color .15s, background .15s;
}
.btn-nav-profile:hover { color: var(--text); background: rgba(124,58,237,.12); }

/* PROFILE PAGE */
.profile-user-card {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.profile-avatar-big {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  font-weight: 800;
  color: white;
  flex-shrink: 0;
}

.profile-username-big {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.2rem;
}

.profile-email-big {
  font-size: 0.88rem;
  color: var(--muted);
  margin-bottom: 0.4rem;
}

.profile-stats {
  font-size: 0.82rem;
  color: var(--accent-l);
  font-weight: 600;
}

/* PROGRESS GRID */
.prog-theme { margin-bottom: 1.8rem; }

.prog-theme-label {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--muted);
  margin-bottom: 0.75rem;
}

.prog-theme-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 0.85rem;
}

.prog-card--soon {
  opacity: 0.55;
  cursor: pointer;
}

.prog-soon {
  font-size: 0.75rem;
  color: var(--dim);
  font-style: italic;
  margin-top: 0.3rem;
}

.prog-card {
  background: var(--elevated);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.1rem 1.2rem;
  cursor: pointer;
  transition: border-color .2s, transform .15s, box-shadow .2s;
}

.prog-card:hover {
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(124,58,237,.18);
}

.prog-card--done {
  border-color: rgba(52,211,153,.4);
}

.prog-card-top {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.75rem;
}

.prog-icon { font-size: 1.3rem; flex-shrink: 0; }

.prog-title {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
  flex: 1;
}

.prog-badge {
  background: rgba(52,211,153,.15);
  color: var(--green);
  border: 1px solid rgba(52,211,153,.35);
  border-radius: 20px;
  padding: 0.15rem 0.6rem;
  font-size: 0.72rem;
  font-weight: 700;
  white-space: nowrap;
}

.prog-bar-wrap {
  background: rgba(255,255,255,.07);
  border-radius: 99px;
  height: 6px;
  margin-bottom: 0.5rem;
  overflow: hidden;
}

.prog-bar {
  height: 100%;
  border-radius: 99px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  transition: width .4s ease;
  min-width: 0;
}

.prog-card--done .prog-bar { background: linear-gradient(90deg, #059669, var(--green)); }

.prog-count {
  font-size: 0.78rem;
  color: var(--muted);
}

/* Variable memory diagram */
.mem-diagram { margin: 1.4rem 0; display: flex; flex-direction: column; gap: .55rem; }
.mem-diagram-row { display: flex; align-items: center; }
.mem-col-label { font-size: .72rem; font-weight: 700; text-transform: uppercase; letter-spacing: .05em; color: var(--dim); }
.mem-name {
  width: 150px; flex-shrink: 0;
  padding: .45rem .9rem;
  background: rgba(124,58,237,.1);
  border: 1px solid var(--primary);
  border-radius: 6px;
  font-family: monospace; font-size: .88rem;
  color: var(--text); text-align: center;
}
.mem-arrow { width: 56px; text-align: center; color: var(--dim); font-size: 1.1rem; flex-shrink: 0; }
.mem-slot {
  min-width: 100px;
  padding: .45rem .9rem;
  background: var(--elevated);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-family: monospace; font-size: .88rem; text-align: center;
}
.mem-slot--str  { color: #a5f3fc; }
.mem-slot--num  { color: #93c5fd; }
.mem-slot--bool { color: #86efac; }

/* ══ BLOG & ADMIN ══════════════════════════════════════════════════════════ */

.btn-nav-admin { padding:.3rem .75rem; border-radius:6px; background:var(--primary); color:#fff; font-size:.8rem; font-weight:600; text-decoration:none; }
.btn-nav-admin:hover { opacity:.85; }

.blog-hero { position:relative; padding:2.25rem 1.5rem 2rem; text-align:center; overflow:hidden; }
.blog-hero-inner { position:relative; z-index:1; max-width:700px; margin:0 auto; }
.blog-hero-title { font-size:clamp(1.8rem,5vw,3rem); font-weight:800; margin-bottom:.5rem; }
.blog-hero-sub { color:var(--muted); font-size:1rem; line-height:1.6; margin-bottom:1.25rem; }

.btn-hero-courses {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  text-decoration: none;
  padding: .6rem 1.4rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: .9rem;
  letter-spacing: .01em;
  transition: opacity .15s, transform .15s, box-shadow .15s;
  box-shadow: 0 4px 16px rgba(124,58,237,.3);
}
.btn-hero-courses:hover { opacity: .9; transform: translateY(-2px); box-shadow: 0 6px 20px rgba(124,58,237,.45); }

.blog-container { max-width:860px; margin:0 auto; padding:2rem 1.5rem 4rem; }
#blog-home .blog-container { max-width:1140px; }
.blog-loading { text-align:center; color:var(--dim); padding:3rem; }

/* Blog list — shared micro-elements */
.blog-card-meta { display:flex; gap:1rem; font-size:.78rem; color:var(--dim); margin-bottom:.5rem; flex-wrap:wrap; }
.blog-card-footer { display:flex; gap:1.25rem; margin-top:auto; padding-top:.75rem; font-size:.8rem; color:var(--dim); border-top:1px solid var(--border); }
.blog-empty { text-align:center; color:var(--dim); padding:3rem; font-size:1.05rem; }

/* Featured (à la une) */
.blog-featured {
  display:grid; grid-template-columns:55fr 45fr;
  background:var(--card); border:1px solid var(--border2);
  border-radius:16px; overflow:hidden; cursor:pointer; margin-bottom:2rem;
  min-height:360px; transition:border-color .2s, box-shadow .2s;
}
.blog-featured:hover { border-color:var(--accent); box-shadow:0 8px 40px #0006; }
.blog-featured-img {
  position:relative; overflow:hidden;
  background:linear-gradient(135deg, var(--elevated) 0%, var(--border) 100%);
}
.blog-featured-img img { width:100%; height:100%; object-fit:cover; display:block; transition:transform .4s; }
.blog-featured:hover .blog-featured-img img { transform:scale(1.04); }
.blog-featured-img-placeholder {
  width:100%; height:100%; min-height:360px;
  display:flex; align-items:center; justify-content:center; font-size:5rem; opacity:.3;
}
.blog-featured-body {
  padding:2.5rem 2.25rem; display:flex; flex-direction:column; gap:.7rem;
}
.blog-featured-label {
  font-size:.68rem; font-weight:700; letter-spacing:.12em;
  text-transform:uppercase; color:var(--accent);
}
.blog-featured-title { font-size:clamp(1.3rem,2.5vw,1.85rem); font-weight:800; line-height:1.3; }
.blog-featured-excerpt { color:var(--muted); font-size:.97rem; line-height:1.7; flex:1; }
.blog-featured-meta { display:flex; gap:1rem; font-size:.8rem; color:var(--dim); flex-wrap:wrap; }
.blog-featured-footer {
  display:flex; gap:1.25rem; font-size:.82rem; color:var(--dim);
  padding-top:.75rem; border-top:1px solid var(--border);
}

/* Grid of smaller articles */
.blog-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:1.25rem; }
.blog-grid-card {
  background:var(--card); border:1px solid var(--border);
  border-radius:12px; overflow:hidden; cursor:pointer;
  display:flex; flex-direction:column; transition:border-color .15s, transform .12s;
}
.blog-grid-card:hover { border-color:var(--accent); transform:translateY(-3px); }
.blog-grid-img {
  aspect-ratio:16/9; overflow:hidden; flex-shrink:0;
  background:linear-gradient(135deg, var(--elevated) 0%, var(--border) 100%);
}
.blog-grid-img img { width:100%; height:100%; object-fit:cover; display:block; transition:transform .3s; }
.blog-grid-card:hover .blog-grid-img img { transform:scale(1.05); }
.blog-grid-img-placeholder {
  width:100%; height:100%; min-height:130px;
  display:flex; align-items:center; justify-content:center; font-size:2.5rem; opacity:.3;
}
.blog-grid-body { padding:1.1rem 1.25rem 1.25rem; flex:1; display:flex; flex-direction:column; gap:.45rem; }
.blog-grid-title { font-size:1rem; font-weight:700; line-height:1.4; }
.blog-grid-excerpt { color:var(--muted); font-size:.875rem; line-height:1.6; flex:1; }

@media(max-width:960px) {
  .blog-featured { grid-template-columns:1fr; }
  .blog-featured-img { aspect-ratio:16/7; min-height:0; }
  .blog-featured-img-placeholder { min-height:200px; }
  .blog-grid { grid-template-columns:repeat(2,1fr); }
}
@media(max-width:600px) {
  .blog-grid { grid-template-columns:1fr; }
  .blog-featured-body { padding:1.5rem 1.25rem; }
}

.blog-article-container { padding-top:1.5rem; }
.blog-back { display:inline-block; color:var(--primary); font-size:.9rem; margin-bottom:1.5rem; text-decoration:none; }
.blog-back:hover { text-decoration:underline; }
.blog-article-title { font-size:clamp(1.5rem,4vw,2.2rem); font-weight:800; line-height:1.25; margin-bottom:.75rem; }
.blog-article-meta { display:flex; gap:1.25rem; font-size:.85rem; color:var(--dim); flex-wrap:wrap; margin-bottom:2rem; }

.markdown-body { line-height:1.75; color:var(--text); }
.markdown-body h1,.markdown-body h2,.markdown-body h3,.markdown-body h4 { font-weight:700; margin:1.75rem 0 .6rem; }
.markdown-body h1 { font-size:1.8rem; }
.markdown-body h2 { font-size:1.4rem; border-bottom:1px solid var(--border); padding-bottom:.3rem; }
.markdown-body h3 { font-size:1.15rem; }
.markdown-body p { margin:.9rem 0; }
.markdown-body ul,.markdown-body ol { margin:.9rem 0 .9rem 1.4rem; }
.markdown-body li { margin:.3rem 0; }
.markdown-body code { background:#1e1e2e; color:#a5f3fc; padding:.15em .4em; border-radius:4px; font-size:.875em; }
.markdown-body pre { background:#1e1e2e; border-radius:8px; padding:1rem 1.25rem; overflow-x:auto; margin:1.2rem 0; }
.markdown-body pre code { background:none; padding:0; color:#e2e8f0; font-size:.875rem; }
.markdown-body blockquote { border-left:3px solid var(--primary); margin:1rem 0; padding:.5rem 1rem; color:var(--dim); background:var(--surface); border-radius:0 6px 6px 0; }
.markdown-body table { width:100%; border-collapse:collapse; margin:1rem 0; }
.markdown-body th,.markdown-body td { border:1px solid var(--border); padding:.5rem .75rem; }
.markdown-body th { background:var(--surface); font-weight:600; }
.markdown-body a { color:var(--primary); }
.markdown-body img { max-width:100%; border-radius:8px; }
.markdown-body hr { border:none; border-top:1px solid var(--border); margin:2rem 0; }

.blog-likes-section { display:flex; align-items:center; gap:1rem; padding:1.5rem 0; border-top:1px solid var(--border); border-bottom:1px solid var(--border); margin:2rem 0; }
.btn-like { display:flex; align-items:center; gap:.5rem; padding:.5rem 1.1rem; border-radius:8px; border:1px solid var(--border); background:var(--surface); color:var(--text); cursor:pointer; font-size:.9rem; font-weight:600; transition:border-color .15s,background .15s; }
.btn-like:hover,.btn-like.liked { border-color:var(--primary); background:var(--primary); color:#fff; }
.likes-count { color:var(--dim); font-size:.9rem; }

.blog-comments-title { font-size:1.1rem; font-weight:700; margin-bottom:1.25rem; }
.comment-item { display:flex; gap:1rem; margin-bottom:1.25rem; }
.comment-avatar { width:36px; height:36px; border-radius:50%; background:var(--primary); color:#fff; display:flex; align-items:center; justify-content:center; font-weight:700; font-size:.85rem; flex-shrink:0; }
.comment-body { flex:1; }
.comment-meta { display:flex; gap:.75rem; font-size:.8rem; color:var(--dim); margin-bottom:.3rem; align-items:center; }
.comment-author { font-weight:600; color:var(--text); }
.comment-content { font-size:.93rem; line-height:1.6; }
.btn-comment-delete { background:none; border:none; color:var(--dim); cursor:pointer; font-size:.75rem; padding:0; }
.btn-comment-delete:hover { color:#ef4444; }
.comment-form { margin-top:1.5rem; }
.comment-form textarea { width:100%; min-height:90px; background:var(--surface); border:1px solid var(--border); border-radius:8px; color:var(--text); padding:.75rem 1rem; font-size:.9rem; resize:vertical; box-sizing:border-box; }
.comment-form textarea:focus { outline:none; border-color:var(--primary); }
.btn-comment-submit { margin-top:.6rem; padding:.5rem 1.25rem; background:var(--primary); color:#fff; border:none; border-radius:7px; font-weight:600; cursor:pointer; font-size:.9rem; }
.comment-gate { color:var(--dim); font-size:.9rem; padding:.75rem 0; }
.comment-gate a { color:var(--primary); cursor:pointer; }

.admin-header { display:flex; justify-content:space-between; align-items:center; margin-bottom:1.75rem; }
.admin-header h2 { font-size:1.4rem; font-weight:700; }
.btn-admin-new { padding:.5rem 1.1rem; background:var(--primary); color:#fff; border:none; border-radius:7px; font-weight:600; cursor:pointer; font-size:.9rem; }
.admin-article-row { display:flex; align-items:center; gap:.75rem; padding:1rem; background:var(--surface); border:1px solid var(--border); border-radius:8px; margin-bottom:.6rem; }
.admin-article-info { flex:1; }
.admin-article-title-text { font-weight:600; font-size:.95rem; }
.admin-article-meta { font-size:.8rem; color:var(--dim); margin-top:.2rem; }
.admin-badge { font-size:.7rem; padding:.15rem .45rem; border-radius:4px; font-weight:600; }
.admin-badge--pub { background:#22c55e22; color:#22c55e; }
.admin-badge--draft { background:#f59e0b22; color:#f59e0b; }
.btn-admin-edit,.btn-admin-del { padding:.35rem .8rem; border-radius:6px; font-size:.82rem; font-weight:600; cursor:pointer; border:none; }
.btn-admin-edit { background:var(--surface); border:1px solid var(--border); color:var(--text); }
.btn-admin-edit:hover { border-color:var(--primary); color:var(--primary); }
.btn-admin-del { background:#ef444422; color:#ef4444; }
.btn-admin-del:hover { background:#ef4444; color:#fff; }
.admin-form { margin-top:1.5rem; }
.admin-field { margin-bottom:1.25rem; }
.admin-field label { display:block; font-size:.85rem; font-weight:600; margin-bottom:.4rem; color:var(--dim); }
.admin-hint { font-weight:400; font-size:.75rem; color:var(--primary); margin-left:.4rem; }
.admin-input { width:100%; background:var(--surface); border:1px solid var(--border); border-radius:7px; color:var(--text); padding:.6rem .9rem; font-size:.93rem; box-sizing:border-box; }
.admin-input:focus { outline:none; border-color:var(--primary); }
.admin-editor-split { display:grid; grid-template-columns:1fr 1fr; gap:1rem; min-height:400px; }
.admin-textarea { width:100%; height:100%; min-height:400px; background:var(--surface); border:1px solid var(--border); border-radius:7px; color:var(--text); padding:.75rem 1rem; font-size:.88rem; font-family:monospace; resize:vertical; box-sizing:border-box; }
.admin-textarea:focus { outline:none; border-color:var(--primary); }
.admin-preview { background:var(--surface); border:1px solid var(--border); border-radius:7px; padding:1rem; overflow-y:auto; }
.admin-field--row { display:flex; align-items:center; justify-content:space-between; flex-wrap:wrap; gap:.75rem; }
.admin-checkbox-label { display:flex; align-items:center; gap:.5rem; font-size:.9rem; cursor:pointer; }
.admin-actions { display:flex; gap:.6rem; }
.btn-admin-cancel { padding:.45rem 1rem; border:1px solid var(--border); border-radius:7px; background:transparent; color:var(--dim); cursor:pointer; font-size:.9rem; }
.btn-admin-save { padding:.45rem 1.1rem; background:var(--primary); color:#fff; border:none; border-radius:7px; font-weight:600; cursor:pointer; font-size:.9rem; }
@media(max-width:700px){ .admin-editor-split { grid-template-columns:1fr; } .admin-preview { display:none; } }