/* PharmaPrep — teal/clinical theme */
:root{
  --bg:#eef4f3;
  --card:#ffffff;
  --ink:#16302c;
  --muted:#5f7a74;
  --teal:#0f8f7e;
  --teal-dark:#0a6e61;
  --mint:#d7ede8;
  --amber:#e0912f;
  --red:#c0453c;
  --line:#d5e4e0;
  --lock:#9fb4af;
}
*{box-sizing:border-box;margin:0;padding:0}
body{
  font-family:"Segoe UI",system-ui,-apple-system,sans-serif;
  background:var(--bg);color:var(--ink);line-height:1.55;
}
a{color:var(--teal-dark);text-decoration:none}
a:hover{text-decoration:underline}
.container{max-width:1040px;margin:0 auto;padding:0 16px}

/* nav */
.nav{background:var(--card);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
.nav .inner{display:flex;align-items:center;gap:18px;height:62px;max-width:1040px;margin:0 auto;padding:0 16px}
.brand{font-size:1.35rem;font-weight:800;color:var(--teal-dark);letter-spacing:-.02em;display:flex;align-items:center;gap:8px}
.brand .rx{background:var(--teal);color:#fff;width:30px;height:30px;border-radius:8px;display:grid;place-items:center;font-size:1rem}
.nav .links{margin-left:auto;display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.nav .links a,.nav .links form button{
  font-size:.9rem;padding:8px 14px;border-radius:8px;color:var(--ink);border:none;background:none;cursor:pointer
}
.nav .links a:hover{background:var(--mint);text-decoration:none}
.nav .links a.cta{background:var(--teal);color:#fff}
.nav .links a.cta:hover{background:var(--teal-dark)}

/* flash */
.flash{padding:12px 16px;border-radius:10px;margin:16px 0;font-size:.92rem}
.flash.ok{background:#e2f2ec;border:1px solid #b6ddcf;color:#1b6b52}
.flash.err{background:#fbe6e3;border:1px solid #f0c0ba;color:#a3352c}

/* hero */
.hero{text-align:center;padding:54px 16px 34px}
.hero h1{font-size:2.5rem;letter-spacing:-.02em;margin-bottom:10px}
.hero p{color:var(--muted);font-size:1.05rem;max-width:560px;margin:0 auto}
.hero .rx-badge{display:inline-block;background:var(--mint);color:var(--teal-dark);font-weight:600;
  padding:5px 14px;border-radius:99px;font-size:.8rem;letter-spacing:.08em;text-transform:uppercase;margin-bottom:16px}

/* section title */
.section-title{font-size:1.4rem;margin:28px 0 4px}
.section-sub{color:var(--muted);margin-bottom:20px;font-size:.95rem}

/* course grid */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px;margin-bottom:40px}
.course{
  background:var(--card);border:1px solid var(--line);border-radius:14px;overflow:hidden;
  display:flex;flex-direction:column;transition:transform .12s,box-shadow .18s
}
.course:hover{transform:translateY(-3px);box-shadow:0 10px 26px rgba(15,80,70,.10)}
.course .thumb{height:120px;background:linear-gradient(135deg,var(--teal),#14b39c);
  display:grid;place-items:center;color:#fff;font-size:2.6rem;position:relative}
.course .thumb.locked::after{content:"🔒";position:absolute;top:10px;right:12px;font-size:1.1rem;
  background:rgba(0,0,0,.25);width:34px;height:34px;border-radius:50%;display:grid;place-items:center}
.course .body{padding:16px 18px;display:flex;flex-direction:column;flex:1}
.course h3{font-size:1.14rem;margin-bottom:6px}
.course .desc{color:var(--muted);font-size:.9rem;flex:1;margin-bottom:14px}
.course .meta{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}
.course .price{font-weight:800;color:var(--teal-dark);font-size:1.2rem}
.course .qcount{font-size:.8rem;color:var(--muted)}
.badge-owned{background:#e2f2ec;color:#1b6b52;font-size:.72rem;font-weight:700;padding:3px 10px;border-radius:99px}
.badge-done{background:#fff3e0;color:#a9701c;font-size:.72rem;font-weight:700;padding:3px 10px;border-radius:99px}

/* buttons */
.btn{display:inline-block;text-align:center;border:none;border-radius:10px;cursor:pointer;
  font-size:.95rem;font-weight:600;padding:11px 18px;transition:background .15s,opacity .15s}
.btn-primary{background:var(--teal);color:#fff}
.btn-primary:hover{background:var(--teal-dark);text-decoration:none}
.btn-block{display:block;width:100%}
.btn-ghost{background:var(--mint);color:var(--teal-dark)}
.btn-ghost:hover{background:#c5e3db;text-decoration:none}
.btn-amber{background:var(--amber);color:#fff}
.btn-danger{background:var(--red);color:#fff}
.btn-sm{padding:7px 12px;font-size:.85rem}
.btn[disabled]{opacity:.5;cursor:not-allowed}

/* card / forms */
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:26px}
.auth-wrap{max-width:420px;margin:44px auto}
.auth-wrap h2{margin-bottom:4px}
.auth-wrap .sub{color:var(--muted);margin-bottom:20px;font-size:.92rem}
label{display:block;font-size:.85rem;font-weight:600;margin:12px 0 5px;color:var(--ink)}
input[type=text],input[type=email],input[type=password],input[type=number],textarea,select{
  width:100%;padding:11px 13px;border:1px solid var(--line);border-radius:9px;font-size:.95rem;
  font-family:inherit;background:#fbfdfc}
input:focus,textarea:focus,select:focus{outline:none;border-color:var(--teal);background:#fff}
textarea{resize:vertical;min-height:80px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.help{font-size:.78rem;color:var(--muted);margin-top:4px}
.center-link{text-align:center;margin-top:16px;font-size:.9rem;color:var(--muted)}

/* table */
.table{width:100%;border-collapse:collapse;background:var(--card);border-radius:12px;overflow:hidden;
  border:1px solid var(--line)}
.table th,.table td{padding:11px 14px;text-align:left;border-bottom:1px solid var(--line);font-size:.9rem}
.table th{background:var(--mint);color:var(--teal-dark);font-weight:700;font-size:.78rem;
  text-transform:uppercase;letter-spacing:.05em}
.table tr:last-child td{border-bottom:none}
.table .actions{display:flex;gap:6px}

/* admin layout */
.admin-shell{display:flex;min-height:calc(100vh - 62px)}
.side{width:210px;background:var(--card);border-right:1px solid var(--line);padding:18px 0;flex-shrink:0}
.side a{display:block;padding:11px 22px;color:var(--ink);font-size:.92rem;border-left:3px solid transparent}
.side a:hover{background:var(--mint);text-decoration:none}
.side a.active{background:var(--mint);border-left-color:var(--teal);font-weight:600;color:var(--teal-dark)}
.admin-main{flex:1;padding:26px 28px;overflow-x:auto}
.admin-main h1{font-size:1.5rem;margin-bottom:18px}
.toolbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:18px;gap:12px;flex-wrap:wrap}
.stat-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:16px;margin-bottom:26px}
.stat{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:18px}
.stat .n{font-size:1.8rem;font-weight:800;color:var(--teal-dark)}
.stat .l{font-size:.82rem;color:var(--muted);margin-top:2px}

/* quiz */
.quiz-head{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px 20px;
  margin:20px 0;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:10px}
.timer{font-weight:800;font-size:1.1rem;color:var(--teal-dark);background:var(--mint);
  padding:6px 16px;border-radius:99px}
.timer.low{color:var(--red);background:#fbe6e3;animation:pulse 1s infinite}
@keyframes pulse{50%{opacity:.55}}
.q{background:var(--card);border:1px solid var(--line);border-left:5px solid var(--teal);
  border-radius:10px;padding:18px 20px;margin-bottom:16px}
.q .num{font-size:.72rem;letter-spacing:.12em;text-transform:uppercase;color:var(--amber);font-weight:700}
.q h4{font-size:1.05rem;font-weight:600;margin:5px 0 14px}
.opt{display:block;border:1px solid var(--line);border-radius:8px;padding:11px 15px;margin-bottom:9px;
  cursor:pointer;transition:background .13s,border-color .13s}
.opt:hover{background:var(--mint)}
.opt input{margin-right:10px;accent-color:var(--teal)}
.opt.correct{background:#e2f2ec;border-color:var(--teal)}
.opt.wrong{background:#fbe6e3;border-color:var(--red)}
.opt.locked{pointer-events:none}

/* result */
.result-card{text-align:center;background:var(--card);border:2px solid var(--teal);border-radius:14px;
  padding:34px 24px;margin:20px 0}
.result-card .score{font-size:3rem;font-weight:800;color:var(--teal-dark)}
.result-card .verdict{font-size:1.15rem;margin-top:6px;font-weight:600}
.result-card .verdict.pass{color:var(--teal-dark)}
.result-card .verdict.fail{color:var(--red)}

/* QR / payment */
.pay-wrap{max-width:420px;margin:36px auto;text-align:center}
.qr-box{background:#fff;border:1px solid var(--line);border-radius:14px;padding:26px;margin:18px 0}
#qrcode{display:flex;justify-content:center;margin:10px 0}
#qrcode img,#qrcode canvas{border-radius:8px}
.pay-amt{font-size:2rem;font-weight:800;color:var(--teal-dark)}
.pay-status{margin-top:14px;font-weight:600;padding:10px;border-radius:9px;background:var(--mint);color:var(--teal-dark)}
.pay-status.ok{background:#e2f2ec;color:#1b6b52}
.pay-status.err{background:#fbe6e3;color:#a3352c}
.spinner{width:18px;height:18px;border:3px solid var(--mint);border-top-color:var(--teal);
  border-radius:50%;display:inline-block;vertical-align:middle;margin-right:8px;animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* footer */
footer.site{background:var(--card);border-top:1px solid var(--line);margin-top:50px;padding:26px 16px;text-align:center}
footer.site .dev{font-weight:700;color:var(--teal-dark)}
footer.site .dev span{color:var(--amber)}
footer.site small{display:block;color:var(--muted);margin-top:4px;font-size:.8rem}

.empty{text-align:center;color:var(--muted);padding:44px 16px}
.empty .ic{font-size:2.6rem;margin-bottom:10px}

@media(max-width:640px){
  .hero h1{font-size:1.9rem}
  .form-row{grid-template-columns:1fr}
  .admin-shell{flex-direction:column}
  .side{width:100%;display:flex;overflow-x:auto;border-right:none;border-bottom:1px solid var(--line)}
  .side a{border-left:none;border-bottom:3px solid transparent;white-space:nowrap}
  .side a.active{border-left:none;border-bottom-color:var(--teal)}
}