:root{
  --bg:#0f1020; --bg2:#15172e; --panel:#1b1e3a; --panel2:#23264a;
  --ink:#eef0ff; --mut:#a7abd6; --line:#2c2f57;
  --acc:#7c5cff; --acc2:#22d3ee; --ok:#34d399; --warn:#ffd500;
  --radius:18px; --shadow:0 14px 40px rgba(0,0,0,.35);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:Outfit,system-ui,sans-serif;color:var(--ink);
  background:var(--bg);line-height:1.5;-webkit-font-smoothing:antialiased;
  min-height:100vh;
}
.app-bg{
  position:fixed;inset:0;z-index:-1;
  background:
    radial-gradient(900px 600px at 80% -10%, rgba(124,92,255,.22), transparent 60%),
    radial-gradient(800px 500px at 0% 10%, rgba(34,211,238,.14), transparent 55%),
    linear-gradient(180deg,var(--bg),var(--bg2));
}

/* ---------- Topbar ---------- */
.topbar{
  position:sticky;top:0;z-index:30;display:flex;align-items:center;gap:18px;
  padding:14px clamp(16px,4vw,40px);
  background:rgba(15,16,32,.72);backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.brand{display:flex;align-items:center;gap:10px;background:none;border:0;color:var(--ink);cursor:pointer;font-size:20px}
.brand-logo{font-size:26px}
.brand-name{font-weight:800;letter-spacing:.3px}
.brand-name b{color:var(--acc2)}
.topnav{display:flex;gap:6px;margin-left:auto;flex-wrap:wrap}
.navlink{
  border:1px solid transparent;background:transparent;color:var(--mut);
  font:inherit;font-weight:600;padding:8px 14px;border-radius:999px;cursor:pointer;transition:.15s;
}
.navlink:hover{color:var(--ink);background:var(--panel)}
.navlink.active{color:#fff;background:linear-gradient(135deg,var(--acc),#5b8cff);border-color:transparent;box-shadow:0 6px 18px rgba(124,92,255,.4)}

/* ---------- Layout ---------- */
.layout{
  display:grid;grid-template-columns:minmax(340px,420px) 1fr;gap:28px;
  max-width:1280px;margin:0 auto;padding:28px clamp(16px,4vw,40px) 60px;
  align-items:start;
}
@media(max-width:960px){ .layout{grid-template-columns:1fr;gap:18px} }

/* ---------- Panneau cube ---------- */
.cube-panel{position:sticky;top:80px}
@media(max-width:960px){ .cube-panel{position:relative;top:0} }
.cube-widget{
  background:linear-gradient(180deg,var(--panel),var(--panel2));
  border:1px solid var(--line);border-radius:var(--radius);
  padding:18px;box-shadow:var(--shadow);
}

/* scène 3D */
.cv-stage{
  height:300px;display:flex;align-items:center;justify-content:center;
  perspective:1100px;cursor:grab;touch-action:none;user-select:none;
  margin-bottom:8px;
}
.cv-stage:active{cursor:grabbing}
.cv-scene{transform-style:preserve-3d}
.cv-cube{position:relative;width:0;height:0;transform-style:preserve-3d;transition:transform .12s ease-out}
.cubie{position:absolute;width:60px;height:60px;
  left:-30px;top:-30px;transform-style:preserve-3d}
.face{
  position:absolute;width:60px;height:60px;border-radius:9px;
  background:#0a0a17;border:3px solid #0a0a17;backface-visibility:hidden;
  box-shadow:inset 0 0 0 1px rgba(0,0,0,.25);
}
.face--inner{background:#0a0a17 !important;border-color:#0a0a17}

/* patron 2D */
.cv-net{display:flex;flex-direction:column;gap:3px;align-items:center;margin:6px 0 12px}
.net-row{display:flex;gap:3px}
.net-face{display:grid;grid-template-columns:repeat(3,1fr);gap:2px;padding:2px;background:#0a0a17;border-radius:5px}
.net-face--empty{background:transparent}
.net-face i{width:13px;height:13px;border-radius:3px}

/* contrôles */
.cv-controls{display:flex;align-items:center;gap:8px;flex-wrap:wrap;justify-content:center;
  padding-top:12px;border-top:1px solid var(--line)}
.cv-btn{
  width:42px;height:42px;border-radius:12px;border:1px solid var(--line);
  background:var(--panel2);color:var(--ink);font-size:16px;cursor:pointer;transition:.15s;
  display:flex;align-items:center;justify-content:center;
}
.cv-btn:hover:not(:disabled){background:var(--acc);border-color:var(--acc);transform:translateY(-1px)}
.cv-btn:disabled{opacity:.35;cursor:default}
.cv-btn.play{background:linear-gradient(135deg,var(--acc),#5b8cff)}
.cv-speed{display:flex;align-items:center;gap:6px;font-size:12px;color:var(--mut);width:100%;justify-content:center;margin-top:6px}
.cv-speed input{accent-color:var(--acc)}

.cv-btn.on{background:var(--acc2);border-color:var(--acc2);color:#06202a}

/* pavé de mouvements (mode libre) */
.cv-keypad{display:grid;grid-template-columns:repeat(4,1fr);gap:6px;margin-top:12px;
  padding-top:12px;border-top:1px solid var(--line)}
.kp-pair{display:flex;gap:4px}
.kp-btn{flex:1;font-family:ui-monospace,Menlo,monospace;font-weight:700;font-size:14px;
  padding:9px 0;border-radius:9px;border:1px solid var(--line);background:var(--bg2);
  color:var(--ink);cursor:pointer;transition:.12s}
.kp-btn:hover{background:var(--acc);border-color:var(--acc);transform:translateY(-1px)}
.kp-btn:active{transform:scale(.94)}

/* séquence */
.cv-seq{display:flex;flex-wrap:wrap;gap:6px;justify-content:center;margin-top:14px;min-height:30px}
.cv-seq-empty{color:var(--mut);font-size:13px}
.cv-seq-label,.mix-label{color:var(--mut);font-size:13px;width:100%;text-align:center;margin-bottom:2px}
.mv{
  font-family:ui-monospace,Menlo,monospace;font-weight:700;font-size:14px;
  padding:5px 9px;border-radius:8px;background:var(--bg2);border:1px solid var(--line);color:var(--mut);
}
.mv--done{color:var(--ink);background:var(--panel2)}
.mv--next{color:#fff;background:linear-gradient(135deg,var(--acc),#5b8cff);border-color:transparent;box-shadow:0 4px 12px rgba(124,92,255,.45)}

/* ---------- Contenu ---------- */
.page-head h1{font-size:clamp(24px,3.4vw,34px);font-weight:800;margin-bottom:8px;letter-spacing:-.5px}
.page-head p{color:var(--mut);max-width:62ch;margin-bottom:22px}
.page-head b{color:var(--ink)}

/* étapes */
.steps{display:flex;flex-direction:column;gap:16px}
.step{display:flex;gap:16px;background:var(--panel);border:1px solid var(--line);
  border-radius:var(--radius);padding:18px}
.step-num{flex:0 0 auto;width:38px;height:38px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;font-weight:800;color:#fff;
  background:linear-gradient(135deg,var(--acc),#5b8cff);box-shadow:0 6px 16px rgba(124,92,255,.4)}
.step-body h2{font-size:19px;margin-bottom:6px}
.step-body p{color:var(--mut);margin-bottom:10px;font-size:15px}
.step-body .goal{color:var(--ink);font-weight:600}
.tip{font-size:13.5px !important;color:var(--acc2) !important;background:rgba(34,211,238,.07);
  border-left:3px solid var(--acc2);padding:8px 12px;border-radius:8px;margin-top:4px}

/* bouton formule */
.algo{display:flex;align-items:center;gap:12px;width:100%;text-align:left;cursor:pointer;
  background:var(--bg2);border:1px solid var(--line);border-radius:12px;padding:10px 12px;
  color:var(--ink);margin-bottom:8px;transition:.15s}
.algo:hover{border-color:var(--acc);transform:translateX(2px)}
.algo.on{border-color:var(--acc2);box-shadow:0 0 0 2px rgba(34,211,238,.25)}
.algo-go{flex:0 0 auto;width:30px;height:30px;border-radius:50%;background:var(--acc);
  display:flex;align-items:center;justify-content:center;font-size:13px}
.algo-text{display:flex;flex-direction:column}
.algo-text b{font-size:14px}
.algo-text code{font-family:ui-monospace,Menlo,monospace;color:var(--acc2);font-size:13px;margin-top:2px}

/* formules - cartes */
.cat{font-size:15px;text-transform:uppercase;letter-spacing:1.5px;color:var(--mut);
  margin:26px 0 12px}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:12px}
.card{text-align:left;cursor:pointer;background:var(--panel);border:1px solid var(--line);
  border-radius:14px;padding:14px;color:var(--ink);transition:.15s}
.card:hover{border-color:var(--acc);transform:translateY(-2px);box-shadow:var(--shadow)}
.card.on{border-color:var(--acc2);box-shadow:0 0 0 2px rgba(34,211,238,.25)}
.card-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px}
.card-name{font-weight:700}
.card-go{width:26px;height:26px;border-radius:50%;background:var(--acc);display:flex;
  align-items:center;justify-content:center;font-size:12px}
.card-alg{display:block;font-family:ui-monospace,Menlo,monospace;color:var(--acc2);
  font-size:12.5px;background:var(--bg2);padding:6px 8px;border-radius:8px;margin-bottom:8px;word-break:break-word}
.card-desc{color:var(--mut);font-size:13.5px}

/* notation */
.moves-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:12px}
.movecard{text-align:left;cursor:pointer;background:var(--panel);border:1px solid var(--line);
  border-radius:14px;padding:14px;color:var(--ink);display:flex;flex-direction:column;gap:4px;transition:.15s}
.movecard:hover{border-color:var(--acc);transform:translateY(-2px)}
.movecard-t{font-family:ui-monospace,Menlo,monospace;font-size:24px;font-weight:800;color:var(--acc2)}
.movecard-n{font-weight:600;font-size:13px;color:var(--mut)}
.movecard-d{font-size:13.5px;color:var(--mut)}

/* mélangeur */
.mix-actions{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:14px}
.big-btn{font:inherit;font-weight:700;font-size:16px;padding:14px 22px;border-radius:14px;
  border:0;cursor:pointer;color:#fff;background:linear-gradient(135deg,var(--acc),#5b8cff);
  box-shadow:0 8px 22px rgba(124,92,255,.4);transition:.15s}
.big-btn:hover{transform:translateY(-2px)}
.big-btn.ghost{background:var(--panel);border:1px solid var(--line);color:var(--ink);box-shadow:none}
.mix-note{color:var(--mut);font-size:14px;margin-bottom:14px}
.mix-current{display:flex;flex-wrap:wrap;gap:8px}
.mix-current code{font-family:ui-monospace,Menlo,monospace;font-weight:700;
  background:var(--bg2);border:1px solid var(--line);padding:6px 10px;border-radius:8px;color:var(--acc2)}

/* notation : aide clavier */
.kb-hint{background:rgba(124,92,255,.1);border:1px solid var(--line);border-radius:12px;
  padding:12px 14px;color:var(--mut) !important;max-width:none !important}
.kb-hint b{color:var(--ink)}
kbd{font-family:ui-monospace,Menlo,monospace;font-size:12px;background:var(--panel2);
  border:1px solid var(--line);border-bottom-width:2px;border-radius:6px;padding:2px 7px;color:var(--ink)}

/* chrono */
.chrono{display:flex;flex-direction:column;gap:16px;max-width:560px}
.scramble{font-family:ui-monospace,Menlo,monospace;font-size:clamp(15px,2.2vw,20px);
  font-weight:700;letter-spacing:1px;color:var(--acc2);background:var(--panel);
  border:1px solid var(--line);border-radius:12px;padding:16px;text-align:center;line-height:1.7}
.timer-box{background:var(--panel);border:2px solid var(--line);border-radius:18px;
  padding:28px 16px;text-align:center;cursor:pointer;transition:.15s;user-select:none}
.timer-box.armed{border-color:var(--ok);box-shadow:0 0 0 3px rgba(52,211,153,.25)}
.timer-box.running{border-color:var(--warn)}
.time{font-family:ui-monospace,Menlo,monospace;font-weight:800;font-size:clamp(48px,11vw,84px);
  line-height:1;color:var(--ink)}
.timer-box.armed .time{color:var(--ok)}
.timer-box.running .time{color:var(--warn)}
.timer-hint{margin-top:10px;color:var(--mut);font-size:13px}
.times-empty{color:var(--mut);font-size:14px}
.times-stats{display:flex;gap:20px;margin-bottom:10px;color:var(--mut);font-size:14px}
.times-stats b{color:var(--ink);font-size:16px}
.times-list{display:flex;flex-wrap:wrap;gap:8px}
.t-chip{font-family:ui-monospace,Menlo,monospace;font-weight:700;background:var(--bg2);
  border:1px solid var(--line);padding:6px 12px;border-radius:9px;color:var(--mut)}
.t-chip.best{color:#06202a;background:var(--ok);border-color:var(--ok)}

/* footer */
.foot{text-align:center;color:var(--mut);font-size:13px;padding:24px 16px 40px}

@media(max-width:520px){
  .cv-stage{height:250px;perspective:900px;transform:scale(.85)}
  .step{padding:14px}
}