/* Salon Academy — light professional theme */
:root{
  --bg:#f6f4ee; --surface:#ffffff; --surface2:#fbf9f4;
  --line:#e6dfd1; --line2:#efe9da;
  --ink:#23272f; --mut:#6f6a5e; --faint:#a39c8b;
  --teal:#0f766e; --teal-d:#0b5954; --rose:#e11d48; --gold:#b45309;
  --ok:#15803d; --ok-bg:#eaf7ee; --warn:#b45309; --warn-bg:#fdf3e3;
  --demo:#7c3aed; --demo-bg:#f1eafe;
  --shadow:0 1px 2px rgba(60,50,30,.06),0 8px 24px -12px rgba(60,50,30,.18);
  --r:16px;
}
*{box-sizing:border-box}
body{margin:0;font-family:"Segoe UI",system-ui,-apple-system,Roboto,Arial,sans-serif;color:var(--ink);
  background:radial-gradient(1000px 420px at 85% -80px,#e7f2ef,transparent),
             radial-gradient(900px 420px at -10% 0%,#fbeef1,transparent),var(--bg);
  min-height:100vh}
h1,h2{font-family:Georgia,"Times New Roman",serif;letter-spacing:.2px}
h1{font-size:clamp(24px,3.4vw,34px);margin:.4em 0}
a{color:var(--teal)}
.wrap{max-width:1120px;margin:0 auto;padding:18px}
/* top bar */
.topbar{display:flex;justify-content:space-between;align-items:center;gap:10px;padding:12px 20px;
  position:sticky;top:0;z-index:10;background:rgba(255,255,255,.9);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);flex-wrap:wrap}
.brand{font-family:Georgia,serif;font-weight:700;font-size:21px;color:var(--ink);text-decoration:none;
  display:flex;align-items:center;gap:9px}
.brand::before{content:"✂";background:linear-gradient(135deg,var(--teal),#14b8a6);color:#fff;width:34px;height:34px;
  border-radius:10px;display:inline-flex;align-items:center;justify-content:center;font-size:17px}
nav{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.hello{color:var(--mut);font-size:14px}
/* buttons */
.btn{display:inline-block;background:linear-gradient(135deg,var(--teal),#14a396);color:#fff;border:0;
  border-radius:12px;padding:10px 18px;text-decoration:none;font-weight:700;cursor:pointer;
  box-shadow:0 4px 12px -4px rgba(15,118,110,.5);font-size:15px}
.btn:hover{filter:brightness(1.06)}
.btn.small{padding:7px 13px;font-size:13.5px}.btn.big{font-size:16.5px;padding:13px 22px}
.btn.ghost{background:var(--surface);color:var(--ink);border:1px solid var(--line);box-shadow:none}
/* hero */
.hero{display:grid;grid-template-columns:1.25fr .75fr;gap:24px;align-items:center;padding:30px 0 10px}
.pill{display:inline-block;background:#fff;border:1px solid var(--line);border-radius:99px;padding:6px 13px;
  font-size:12.5px;color:var(--mut);font-weight:600}
.grad{background:linear-gradient(90deg,var(--teal),var(--rose));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero h1{font-size:clamp(30px,4.6vw,50px);line-height:1.08;margin:.35em 0}
.hero p{color:#3d434e;line-height:1.65}
.cta-row{display:flex;gap:10px;flex-wrap:wrap;margin:16px 0}
.mini-stats{display:flex;gap:12px;flex-wrap:wrap}
.mini-stats div{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:10px 18px;
  text-align:center;min-width:104px;box-shadow:var(--shadow)}
.mini-stats b{display:block;font-size:23px;color:var(--teal)}.mini-stats span{color:var(--mut);font-size:12px}
.hero-art{position:relative;min-height:250px;background:var(--surface);border:1px solid var(--line);
  border-radius:22px;box-shadow:var(--shadow);overflow:hidden;
  background-image:radial-gradient(220px 160px at 20% 20%,#fdf0e4,transparent),radial-gradient(260px 180px at 85% 80%,#e2f3f0,transparent)}
.orb{position:absolute;font-size:54px;filter:drop-shadow(0 10px 14px rgba(0,0,0,.18));animation:float 4s ease-in-out infinite}
.o1{left:12%;top:8%}.o2{left:58%;top:2%;animation-delay:1s}.o3{left:36%;top:44%;animation-delay:2s}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-12px)}}
.hero-card{position:absolute;bottom:14px;left:14px;right:14px;background:rgba(255,255,255,.92);
  border:1px solid var(--line);border-radius:14px;padding:12px 14px;font-weight:600}
/* course cards */
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:18px 0}
.course-card{background:var(--surface);border:1px solid var(--line);border-top:6px solid var(--c);
  border-radius:18px;padding:20px;display:flex;flex-direction:column;gap:8px;box-shadow:var(--shadow)}
.cc-top{display:flex;justify-content:space-between;align-items:center}
.cc-icon{font-size:34px;background:var(--surface2);border:1px solid var(--line2);width:58px;height:58px;
  border-radius:16px;display:inline-flex;align-items:center;justify-content:center}
.cc-icon.big{font-size:46px;width:74px;height:74px}
.cc-dur{background:var(--surface2);border:1px solid var(--line);border-radius:99px;padding:5px 11px;font-size:12px;color:var(--mut)}
.ticks{list-style:none;padding:0;margin:8px 0}.ticks li{margin:7px 0}
.cc-foot{margin-top:auto;display:flex;justify-content:space-between;align-items:center;gap:8px;flex-wrap:wrap}
/* how it works */
.how{background:var(--surface);border:1px solid var(--line);border-radius:20px;padding:22px;margin:22px 0;box-shadow:var(--shadow)}
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.steps>div{background:var(--surface2);border:1px solid var(--line2);border-radius:14px;padding:14px}
.steps b{background:var(--teal);color:#fff;border-radius:50%;width:28px;height:28px;display:inline-flex;align-items:center;justify-content:center}
.steps h3{margin:.5em 0 .3em}.steps p{color:var(--mut);font-size:14px;margin:0}
/* generic cards / forms */
.card{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:20px;margin:14px 0;box-shadow:var(--shadow)}
.auth{max-width:560px;margin:22px auto}
.form{display:flex;flex-direction:column;gap:12px}
.form input,.form select,.form textarea{background:#fff;border:1px solid var(--line);color:var(--ink);
  border-radius:10px;padding:11px;width:100%;font-size:15px}
.form input:focus,.form select:focus,.form textarea:focus{outline:2px solid #99ddd6;border-color:var(--teal)}
.form label{display:flex;flex-direction:column;gap:6px;font-weight:600;font-size:14px}
.hl{background:var(--demo-bg);border:1.5px dashed var(--demo);border-radius:10px;padding:8px}
.alert{background:var(--warn-bg);border:1px solid #ecd3ac;border-left:5px solid var(--warn);border-radius:12px;padding:12px 14px;margin:12px 0}
.alert.green{background:var(--ok-bg);border-color:#bfe3c9;border-left-color:var(--ok)}
.muted{color:var(--mut)}.small{font-size:13px}
code{background:var(--surface2);border:1px solid var(--line);padding:2px 7px;border-radius:6px;font-size:.9em}
/* demo */
.demo-badge{background:var(--demo);color:#fff;font-size:11px;font-weight:800;border-radius:99px;padding:3px 9px;
  letter-spacing:.6px;font-family:system-ui,sans-serif}
.demo-banner{background:linear-gradient(90deg,var(--demo-bg),#fdf4ff);border:1px solid #d9c8f5;border-left:6px solid var(--demo);
  border-radius:14px;padding:12px 16px;margin:12px 0}
.demo-card{border:1.5px dashed var(--demo);background:linear-gradient(180deg,#fbfaff,#fff)}
/* progress */
.pbar{background:#ece7d9;border-radius:99px;height:12px;overflow:hidden;margin:8px 0}
.pbar div{height:100%;background:linear-gradient(90deg,var(--teal),#34d399)}
/* course / module headers */
.course-head,.mod-head{display:flex;justify-content:flex-start;gap:18px;align-items:center;background:var(--surface);
  border:1px solid var(--line);border-left:8px solid var(--c);border-radius:18px;padding:20px;margin:14px 0;
  box-shadow:var(--shadow);flex-wrap:wrap}
/* timeline */
.timeline{display:flex;flex-direction:column;gap:10px}
.tl-row{display:grid;grid-template-columns:120px 1fr;gap:12px;background:var(--surface);border:1px solid var(--line);
  border-radius:14px;padding:14px}
.tl-row.done{border-color:#9ed8b1;background:#fbfefb}
.tl-row.locked{opacity:.62;background:var(--surface2)}
.tl-week{color:var(--mut);font-size:13px;font-weight:600}
.tl-body h3{margin:.1em 0}.tl-body p{margin:.3em 0}
.row{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:10px}
/* tabs */
.tabs{display:flex;gap:8px;flex-wrap:wrap;margin:14px 0;position:sticky;top:63px;z-index:5;
  background:rgba(246,244,238,.92);padding:8px 0;backdrop-filter:blur(6px)}
.tab{background:#fff;border:1px solid var(--line);color:var(--ink);border-radius:99px;padding:10px 17px;cursor:pointer;font-weight:700}
.tab.active{background:var(--ink);color:#fff;border-color:var(--ink)}
.tabpage{display:none}.tabpage.active{display:block;animation:fade .25s ease}
@keyframes fade{from{opacity:0;transform:translateY(4px)}to{opacity:1}}
.prose p{line-height:1.75}.vsteps{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:10px}
.vstep{background:var(--surface2);border:1px solid var(--line2);border-radius:14px;padding:12px}
.vstep span{font-size:28px}
/* 3D lab keeps its dark equipment look */
.three-wrap{background:#101220;border:1px solid #2a2d45;border-radius:16px;padding:10px;color:#cfd2e6}
#threeBox{width:100%;height:520px;border-radius:12px;overflow:hidden;touch-action:none;background:#0a0a14}
/* activities */
.check{display:block;background:var(--surface2);border:1px solid var(--line);border-radius:10px;padding:10px 12px;margin:6px 0;cursor:pointer}
.flipgrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:10px}
.flip{background:var(--surface2);border:1.5px solid var(--line);border-radius:14px;padding:18px;text-align:center;
  cursor:pointer;min-height:112px;display:flex;align-items:center;justify-content:center;transition:transform .15s}
.flip:hover{transform:translateY(-2px)}
.mixrow{display:flex;justify-content:space-between;align-items:center;background:var(--surface2);
  border:1px solid var(--line);border-radius:10px;padding:8px 10px;margin:6px 0;gap:8px}
.scen{background:var(--surface2);border:1px solid var(--line);border-radius:10px;padding:10px 12px;margin:8px 0}
.q{background:var(--surface2);border:1px solid var(--line);border-radius:12px;padding:12px 14px;margin:10px 0}
.opt{display:block;padding:7px 8px;cursor:pointer;border-radius:8px}.opt:hover{background:#fff}
.explain{background:var(--ok-bg);border:1px solid #bfe3c9;border-radius:8px;padding:8px;margin-top:8px}
.hidden{display:none}
.chip{background:#eef2f1;border:1px solid var(--line);border-radius:99px;padding:4px 11px;font-size:12px;font-weight:600}
.chip.green{background:var(--ok-bg);border-color:#bfe3c9;color:var(--ok)}
textarea{width:100%;background:#fff;border:1px solid var(--line);color:var(--ink);border-radius:10px;padding:10px;font-size:15px}
.practical{border-left:6px solid var(--gold)}
/* tables */
.tablewrap{overflow-x:auto;margin:10px 0;background:#fff;border:1px solid var(--line);border-radius:12px}
table{width:100%;border-collapse:collapse;font-size:14px}
th,td{border-bottom:1px solid var(--line2);padding:9px 10px;text-align:left}
th{background:var(--surface2);font-size:12.5px;text-transform:uppercase;letter-spacing:.4px;color:var(--mut)}
tr:last-child td{border-bottom:0}
/* admin */
.admin-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.rowform{display:flex;gap:8px;flex-wrap:wrap;align-items:end;margin:8px 0}
.footer{border-top:1px solid var(--line);padding:20px;text-align:center;color:var(--mut);margin-top:34px;background:#fff}
/* depth pilot: deep dive + case + rubric */
.deep{border-left:6px solid var(--teal)}
.case{border-left:6px solid var(--gold);background:linear-gradient(180deg,#fffdf6,#fff)}
.case ol{line-height:1.7}
.debrief{background:var(--ok-bg);border:1px solid #bfe3c9;border-radius:10px;padding:10px 12px}
/* guided 3D procedure steps */
.scene-panel{background:var(--surface2);border:1px solid var(--line2);border-radius:14px;padding:14px 16px;margin-top:10px}
.scene-panel h3{margin:.5em 0 .3em}
.step-dots{display:inline-flex;gap:6px;margin-left:6px}
.sdot{width:12px;height:12px;border-radius:50%;border:1px solid var(--line);background:#fff;cursor:pointer;padding:0}
.sdot.on{background:var(--teal);border-color:var(--teal)}
/* responsive — device agnostic */
@media(max-width:860px){.hero{grid-template-columns:1fr}.grid3{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr 1fr}.admin-grid{grid-template-columns:1fr}.tl-row{grid-template-columns:1fr}.row2{grid-template-columns:1fr}}
@media(max-width:520px){.steps{grid-template-columns:1fr}.wrap{padding:12px}.tabs{top:112px}.hero-art{min-height:220px}#threeBox{height:380px}}