/* ==========================================================================
   MathsMDE — Automatismes / Questions Flash
   Palette dérivée du logo MathsMDE : navy profond + bleu signal + ambre timer
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@500;600;700;800&family=Manrope:wght@400;500;600;700&family=JetBrains+Mono:wght@500;700&display=swap');

:root{
  --navy-950:#050c1a;
  --navy-900:#081428;
  --navy-800:#0d1e3a;
  --navy-700:#132a4e;
  --navy-600:#1c3a66;
  --blue-500:#1e8bb4;
  --blue-400:#37b4dd;
  --blue-300:#7fd4f0;
  --ink-050:#f4f8fc;
  --ink-100:#dbe6f2;
  --ink-300:#9db3cc;
  --amber-400:#ffb020;
  --amber-500:#ff8f1f;
  --green-400:#3ddc97;
  --red-400:#ff6b6b;
  --card-bg:#f8fafd;
  --card-ink:#0d1e3a;
  --radius-lg:22px;
  --radius-md:14px;
  --radius-sm:9px;
  --font-display:'Outfit', 'Manrope', sans-serif;
  --font-body:'Manrope', sans-serif;
  --font-mono:'JetBrains Mono', monospace;
  --shadow-deep: 0 24px 60px -20px rgba(2,8,20,.65);
}

*{box-sizing:border-box;}
html,body{margin:0;padding:0;}
body{
  font-family:var(--font-body);
  color:var(--ink-100);
  background:
    radial-gradient(1100px 620px at 12% -10%, #12315c 0%, transparent 60%),
    radial-gradient(900px 700px at 110% 10%, #0f2745 0%, transparent 55%),
    linear-gradient(180deg, var(--navy-950), var(--navy-900) 40%, #060f20 100%);
  min-height:100vh;
  -webkit-font-smoothing:antialiased;
}

a{color:inherit;}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;}

/* ---------- Topbar ---------- */
.topbar{
  display:flex;
  align-items:center;
  gap:16px;
  padding:14px 22px;
  background:linear-gradient(180deg, rgba(8,20,40,.92), rgba(8,20,40,.75));
  border-bottom:1px solid rgba(127,212,240,.14);
  position:sticky;
  top:0;
  z-index:40;
  backdrop-filter:blur(10px);
}
.brand{
  display:flex;
  align-items:center;
  gap:12px;
  text-decoration:none;
  flex:0 0 auto;
}
.brand img{width:40px;height:40px;display:block;filter:drop-shadow(0 4px 10px rgba(30,139,180,.45));}
.brand-text{display:flex;flex-direction:column;line-height:1.1;}
.brand-text b{font-family:var(--font-display);font-weight:700;font-size:1.02rem;color:var(--ink-050);letter-spacing:.2px;}
.brand-text span{font-size:.72rem;color:var(--blue-300);letter-spacing:.14em;text-transform:uppercase;}

.level-name{
  font-family:var(--font-display);
  font-weight:600;
  font-size:.98rem;
  color:var(--ink-100);
  padding:6px 14px;
  border:1px solid rgba(127,212,240,.22);
  border-radius:999px;
  white-space:nowrap;
}

.topbar-spacer{flex:1;}

.topbar-controls{display:flex;align-items:center;gap:10px;flex-wrap:wrap;}

.select-wrap{position:relative;}
select.ui-select{
  appearance:none;
  background:var(--navy-700);
  color:var(--ink-050);
  border:1px solid rgba(127,212,240,.25);
  border-radius:999px;
  padding:9px 34px 9px 16px;
  font-family:var(--font-body);
  font-weight:600;
  font-size:.86rem;
  cursor:pointer;
  outline:none;
}
select.ui-select:focus-visible{box-shadow:0 0 0 3px rgba(55,180,221,.4);}
.select-wrap::after{
  content:"";
  position:absolute;
  right:14px;top:50%;
  width:7px;height:7px;
  border-right:2px solid var(--blue-300);
  border-bottom:2px solid var(--blue-300);
  transform:translateY(-65%) rotate(45deg);
  pointer-events:none;
}

.mode-toggle{
  display:flex;
  background:var(--navy-700);
  border:1px solid rgba(127,212,240,.25);
  border-radius:999px;
  padding:3px;
  gap:2px;
}
.mode-toggle button{
  border:none;
  background:transparent;
  color:var(--ink-300);
  font-family:var(--font-body);
  font-weight:700;
  font-size:.82rem;
  padding:7px 15px;
  border-radius:999px;
  cursor:pointer;
  transition:background .2s, color .2s;
  display:flex;align-items:center;gap:6px;
}
.mode-toggle button.active{
  background:linear-gradient(135deg, var(--blue-500), #145b78);
  color:#fff;
  box-shadow:0 6px 16px -6px rgba(30,139,180,.7);
}

.icon-btn{
  width:38px;height:38px;
  display:flex;align-items:center;justify-content:center;
  background:var(--navy-700);
  border:1px solid rgba(127,212,240,.25);
  border-radius:12px;
  color:var(--ink-100);
  cursor:pointer;
  transition:transform .15s, background .15s, border-color .15s;
}
.icon-btn:hover{background:var(--navy-600);border-color:rgba(127,212,240,.5);}
.icon-btn:active{transform:scale(.93);}
.icon-btn svg{width:18px;height:18px;}

.home-link{
  width:38px;height:38px;
  display:flex;align-items:center;justify-content:center;
  border-radius:12px;
  color:var(--ink-100);
  text-decoration:none;
  border:1px solid rgba(127,212,240,.18);
}
.home-link:hover{background:var(--navy-700);}

/* ---------- Layout ---------- */
.layout{
  display:grid;
  grid-template-columns:1fr 220px;
  gap:22px;
  max-width:1320px;
  margin:0 auto;
  padding:24px 22px 60px;
}
@media (max-width:920px){
  .layout{grid-template-columns:1fr;}
}

.stage{
  min-height:60vh;
}

.stage-empty{
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  text-align:center;
  padding:80px 20px;
  color:var(--ink-300);
  gap:10px;
}
.stage-empty b{color:var(--ink-050);font-family:var(--font-display);font-size:1.2rem;}

/* série header */
.serie-head{
  display:flex;
  align-items:baseline;
  justify-content:space-between;
  margin-bottom:16px;
  flex-wrap:wrap;
  gap:8px;
}
.serie-head h1{
  font-family:var(--font-display);
  font-size:1.4rem;
  font-weight:700;
  color:var(--ink-050);
  margin:0;
  letter-spacing:.2px;
}
.serie-sub{color:var(--blue-300);font-size:.85rem;font-weight:600;}

/* ---------- Grid mode ---------- */
.grid-questions{
  display:grid;
  grid-template-columns:repeat(auto-fit, minmax(300px,1fr));
  gap:16px;
}

.qcard{
  background:linear-gradient(180deg, var(--card-bg), #eef3f9);
  color:var(--card-ink);
  border-radius:var(--radius-lg);
  padding:20px 20px 16px;
  box-shadow:var(--shadow-deep);
  position:relative;
  overflow:hidden;
  border:1px solid rgba(255,255,255,.5);
}
.qcard::before{
  content:"";
  position:absolute;
  left:0;top:0;bottom:0;
  width:5px;
  background:linear-gradient(180deg, var(--blue-500), var(--navy-600));
}
.qnum{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:30px;height:30px;
  border-radius:9px;
  background:var(--navy-800);
  color:#fff;
  font-family:var(--font-mono);
  font-weight:700;
  font-size:.85rem;
  margin-bottom:10px;
}
.qtext{
  font-size:1.02rem;
  line-height:1.55;
  margin:0;
}
.qtext p{margin:0 0 .5em;}

.corrige-toggle{
  margin-top:14px;
  display:inline-flex;
  align-items:center;
  gap:6px;
  background:transparent;
  border:1px solid rgba(13,30,58,.18);
  color:var(--blue-500);
  font-family:var(--font-body);
  font-weight:700;
  font-size:.8rem;
  padding:7px 13px;
  border-radius:999px;
  cursor:pointer;
  transition:background .15s;
}
.corrige-toggle:hover{background:rgba(30,139,180,.09);}
.corrige-toggle svg{width:13px;height:13px;transition:transform .2s;}
.corrige-toggle.open svg{transform:rotate(180deg);}

.corrige-panel{
  margin-top:12px;
  padding:14px 16px;
  border-radius:var(--radius-md);
  background:#eaf6fb;
  border:1px dashed rgba(30,139,180,.35);
  font-size:.94rem;
  line-height:1.6;
  display:none;
}
.corrige-panel.show{display:block;}
.corrige-panel .tag{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:.68rem;
  letter-spacing:.08em;
  text-transform:uppercase;
  color:var(--blue-500);
  font-weight:700;
  margin-bottom:6px;
}
.corrige-pending{
  color:#8a6d1a;
  background:#fff6e2;
  border-color:rgba(255,176,32,.5);
}

/* ---------- Diaporama mode ---------- */
.diapo{
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:22px;
}
.diapo-card{
  width:100%;
  max-width:820px;
  min-height:280px;
  background:linear-gradient(180deg, var(--card-bg), #eef3f9);
  color:var(--card-ink);
  border-radius:28px;
  padding:44px 46px;
  box-shadow:var(--shadow-deep);
  position:relative;
  display:flex;
  flex-direction:column;
  justify-content:center;
}
.diapo-card .qnum{position:absolute;top:26px;left:26px;}
.diapo-card .qtext{font-size:1.35rem;line-height:1.6;padding-top:20px;}
.diapo-card .corrige-toggle{align-self:flex-start;}

.diapo-nav{
  display:flex;
  align-items:center;
  gap:18px;
}
.diapo-nav button{
  width:46px;height:46px;
  border-radius:50%;
  border:1px solid rgba(127,212,240,.3);
  background:var(--navy-700);
  color:var(--ink-050);
  cursor:pointer;
  display:flex;align-items:center;justify-content:center;
  transition:background .15s, transform .15s;
}
.diapo-nav button:hover{background:var(--navy-600);}
.diapo-nav button:disabled{opacity:.35;cursor:default;}
.diapo-nav button:active:not(:disabled){transform:scale(.92);}
.diapo-nav svg{width:18px;height:18px;}

.dots{display:flex;gap:8px;}
.dot{
  width:9px;height:9px;border-radius:50%;
  background:rgba(157,179,204,.35);
  cursor:pointer;
  border:none;
  padding:0;
  transition:background .2s, transform .2s;
}
.dot.active{background:var(--blue-400);transform:scale(1.3);}

.autoplay-toggle{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:.8rem;
  color:var(--ink-300);
  font-weight:600;
}
.switch{
  width:38px;height:22px;
  border-radius:999px;
  background:var(--navy-700);
  border:1px solid rgba(127,212,240,.25);
  position:relative;
  cursor:pointer;
}
.switch::after{
  content:"";
  position:absolute;
  top:2px;left:2px;
  width:16px;height:16px;
  border-radius:50%;
  background:var(--ink-300);
  transition:transform .18s, background .18s;
}
.switch.on{background:linear-gradient(135deg, var(--blue-500), #145b78);}
.switch.on::after{transform:translateX(16px);background:#fff;}

/* ---------- Sidebar (timer + interro) ---------- */
.sidebar{
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:16px;
}
.timer-box{
  background:linear-gradient(180deg, var(--navy-800), var(--navy-900));
  border:1px solid rgba(127,212,240,.18);
  border-radius:var(--radius-lg);
  padding:20px 16px;
  width:100%;
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:12px;
  box-shadow:var(--shadow-deep);
}
.timer-ring-wrap{position:relative;width:150px;height:150px;}
.timer-ring-wrap svg{transform:rotate(-90deg);}
.timer-ring-bg{fill:none;stroke:rgba(127,212,240,.12);stroke-width:8;}
.timer-ring-fg{fill:none;stroke:var(--blue-400);stroke-width:8;stroke-linecap:round;transition:stroke-dashoffset .1s linear, stroke .3s;}
.timer-ring-fg.warn{stroke:var(--amber-400);}
.timer-label{
  position:absolute;inset:0;
  display:flex;align-items:center;justify-content:center;
  font-family:var(--font-mono);
  font-weight:700;
  font-size:1.5rem;
  color:var(--ink-050);
}
.timer-btn{
  width:100%;
  padding:10px;
  border-radius:12px;
  border:1px solid rgba(127,212,240,.25);
  background:var(--navy-700);
  color:var(--ink-050);
  font-family:var(--font-body);
  font-weight:700;
  cursor:pointer;
  transition:background .15s;
}
.timer-btn:hover{background:var(--navy-600);}

.pick-student-btn{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:center;
  gap:9px;
  background:linear-gradient(135deg, var(--amber-500), #c96a0f);
  color:#1a0f02;
  border:none;
  border-radius:var(--radius-lg);
  padding:16px 12px;
  font-family:var(--font-display);
  font-weight:700;
  font-size:.95rem;
  cursor:pointer;
  box-shadow:0 14px 30px -12px rgba(255,143,31,.55);
  transition:transform .15s;
}
.pick-student-btn:hover{transform:translateY(-2px);}
.pick-student-btn svg{width:20px;height:20px;}

@media (max-width:920px){
  .sidebar{flex-direction:row;flex-wrap:wrap;}
  .timer-box{width:auto;flex:1;min-width:220px;}
  .pick-student-btn{flex:1;min-width:180px;}
}

/* ---------- Student picker modal ---------- */
.modal-backdrop{
  position:fixed;inset:0;
  background:rgba(3,8,18,.75);
  backdrop-filter:blur(4px);
  display:none;
  align-items:center;justify-content:center;
  z-index:100;
  padding:20px;
}
.modal-backdrop.show{display:flex;}
.modal-card{
  background:linear-gradient(160deg, var(--navy-800), var(--navy-900));
  border:1px solid rgba(127,212,240,.3);
  border-radius:26px;
  padding:40px 46px;
  text-align:center;
  max-width:420px;
  box-shadow:0 40px 90px -30px rgba(0,0,0,.8);
}
.modal-card .eyebrow{
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--blue-300);
}
.modal-card .student-name{
  font-family:var(--font-display);
  font-weight:800;
  font-size:2.4rem;
  color:#fff;
  margin:14px 0 20px;
  background:linear-gradient(135deg,var(--blue-300),var(--amber-400));
  -webkit-background-clip:text;
  background-clip:text;
  -webkit-text-fill-color:transparent;
}
.modal-card button{
  background:var(--navy-700);
  border:1px solid rgba(127,212,240,.25);
  color:#fff;
  padding:10px 22px;
  border-radius:999px;
  font-weight:700;
  cursor:pointer;
}

/* ---------- Landing (index) ---------- */
.hero{
  max-width:1100px;
  margin:0 auto;
  padding:60px 24px 20px;
  text-align:center;
}
.hero img{width:96px;height:96px;margin-bottom:18px;filter:drop-shadow(0 10px 24px rgba(30,139,180,.5));}
.hero h1{
  font-family:var(--font-display);
  font-size:clamp(1.8rem, 4vw, 2.6rem);
  font-weight:800;
  color:var(--ink-050);
  margin:0 0 10px;
}
.hero p{color:var(--ink-300);max-width:560px;margin:0 auto;font-size:1.02rem;}

.level-grid{
  max-width:1100px;
  margin:36px auto 60px;
  padding:0 24px;
  display:grid;
  grid-template-columns:repeat(auto-fit, minmax(240px,1fr));
  gap:18px;
}
.level-card{
  display:block;
  text-decoration:none;
  background:linear-gradient(160deg, var(--navy-800), var(--navy-900));
  border:1px solid rgba(127,212,240,.16);
  border-radius:var(--radius-lg);
  padding:24px;
  transition:transform .18s, border-color .18s, box-shadow .18s;
  position:relative;
  overflow:hidden;
}
.level-card::after{
  content:"";
  position:absolute;
  right:-30px;bottom:-30px;
  width:120px;height:120px;
  border-radius:50%;
  background:radial-gradient(circle, rgba(30,139,180,.35), transparent 70%);
}
.level-card:hover{transform:translateY(-4px);border-color:rgba(127,212,240,.5);box-shadow:0 20px 40px -20px rgba(30,139,180,.5);}
.level-card .lc-num{
  font-family:var(--font-mono);
  color:var(--blue-300);
  font-size:.78rem;
  letter-spacing:.1em;
}
.level-card h3{
  font-family:var(--font-display);
  color:#fff;
  font-size:1.15rem;
  margin:8px 0 4px;
}
.level-card span.lc-count{color:var(--ink-300);font-size:.86rem;}

footer.site-footer{
  text-align:center;
  color:var(--ink-300);
  font-size:.8rem;
  padding:20px;
  opacity:.7;
}

@media print{
  .topbar,.sidebar,.mode-toggle,.corrige-toggle{display:none;}
}