:root{
  --blue:#4F8EF7;
  --blue-dark:#3d75d6;
  --blue-light:#6BAEFF;
  --orange:#FFA733;
  --orange-dark:#f39413;
  --green:#2ECC91;
  --ink:#1F2A44;
  --muted:#5B7396;
  --border:#E3E8F0;
  --bg:#F4F7FC;
  --card-bg:#FFFFFF;
  --day-mon:#DEDCFB;
  --day-tue:#CFF5E7;
  --day-wed:#FCEEC7;
  --day-thu:#FBDCDC;
  --day-fri:#DCEAFB;
  --radius:18px;
}

*{box-sizing:border-box;}
html,body{margin:0;padding:0;}
body{
  background:var(--bg);
  font-family:'Inter',system-ui,sans-serif;
  color:var(--muted);
  min-height:100vh;
}
h1,h2,h3{
  font-family:'Poppins',system-ui,sans-serif;
  color:var(--ink);
  margin:0 0 12px 0;
}
p{line-height:1.55;margin:0 0 14px 0;}
strong{color:var(--ink);}
a{color:var(--blue);}

#app{max-width:600px;margin:0 auto;min-height:100vh;background:var(--card-bg);
  box-shadow:0 0 40px rgba(31,42,68,0.06);display:flex;flex-direction:column;}

.screen{padding:28px 24px 40px;flex:1;}

.topbar{display:flex;align-items:center;justify-content:space-between;
  padding:18px 24px;border-bottom:1px solid var(--border);}
.logo{display:flex;align-items:center;gap:8px;font-family:'Poppins',sans-serif;
  font-weight:700;font-size:24px;color:var(--ink);letter-spacing:-0.5px;}
.logo-mark{width:26px;height:26px;border-radius:7px;
  background:linear-gradient(135deg,#3EC6E0 0%,#4F8EF7 100%);position:relative;flex:none;}
.logo-mark::after{content:"";position:absolute;inset:6px 3px;
  background:linear-gradient(135deg,#2b2b2b,#000);border-radius:3px;opacity:0.85;}
.icon-btn{background:#EEF3FB;border:none;border-radius:10px;width:38px;height:38px;
  display:flex;align-items:center;justify-content:center;cursor:pointer;color:var(--ink);
  font-size:16px;transition:background .15s;}
.icon-btn:hover{background:#E1EAF9;}

.footer{text-align:center;font-size:12px;color:#9AA9C2;padding:14px;
  border-top:1px solid var(--border);background:#FAFBFE;}
.footer a{color:#9AA9C2;text-decoration:underline;cursor:pointer;}

.btn{
  display:block;width:100%;text-align:center;border:none;border-radius:999px;
  padding:14px 18px;font-family:'Poppins',sans-serif;font-weight:600;font-size:15px;
  cursor:pointer;transition:filter .15s, transform .05s;text-decoration:none;
}
.btn:active{transform:scale(0.99);}
.btn-primary{background:linear-gradient(180deg,var(--blue-light),var(--blue));color:#fff;}
.btn-primary:hover{filter:brightness(1.05);}
.btn-primary:disabled{background:#C9D4E6;cursor:not-allowed;filter:none;}
.btn-secondary{background:linear-gradient(180deg,var(--blue-light),var(--blue));color:#fff;
  display:flex;align-items:center;justify-content:center;gap:8px;}
.btn-orange{background:linear-gradient(180deg,#FFC169,var(--orange));color:#fff;}
.btn-orange:hover{filter:brightness(1.05);}
.btn-ghost{background:#EEF3FB;color:var(--ink);}
.btn-danger-outline{background:#fff;color:#D9534F;border:1px solid #F1C1BF;}
.btn-row{display:flex;gap:10px;}
.btn-row .btn{flex:1;}
.btn+.btn{margin-top:12px;}

label.field-label{display:block;font-weight:600;color:var(--ink);margin-bottom:6px;font-size:14px;}
input[type=text],input[type=password],select{
  width:100%;padding:13px 14px;border:1px solid var(--border);border-radius:12px;
  font-family:'Inter',sans-serif;font-size:15px;color:var(--ink);background:#fff;
  outline:none;transition:border-color .15s;
}
input[type=text]:focus,input[type=password]:focus,select:focus{border-color:var(--blue);}
select{appearance:none;background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='14' height='9'><path d='M1 1l6 6 6-6' stroke='%235B7396' stroke-width='2' fill='none' stroke-linecap='round' stroke-linejoin='round'/></svg>");
  background-repeat:no-repeat;background-position:right 14px center;padding-right:36px;}
select:disabled,input:disabled{background:#F2F5FA;color:#9AA9C2;cursor:not-allowed;}
.field{margin-bottom:18px;}
.error-msg{color:#D9534F;font-size:13.5px;margin:-6px 0 14px 0;}
.hint-box{background:#EEF3FB;border-radius:14px;padding:14px 16px;font-size:13.5px;
  color:var(--muted);margin-top:22px;}
.hint-box code{background:#fff;border-radius:6px;padding:1px 6px;color:var(--ink);}

.login-wrap{display:flex;flex-direction:column;align-items:center;padding-top:14px;}
.login-logo{margin-bottom:26px;}
.login-card{width:100%;}

.info-box{background:#EAF2FF;border-radius:14px;padding:16px 18px;color:var(--blue-dark);
  font-size:14px;margin:18px 0;}
.info-box.locked{background:#F2F5FA;color:var(--muted);text-align:center;font-weight:600;
  padding:18px;}
.info-box.partial{background:#FFF6E9;color:#8a6a1f;border:1px solid #F7E3BE;line-height:1.6;}

.checkbox-card{display:flex;gap:12px;align-items:flex-start;border:1px solid var(--border);
  border-radius:16px;padding:16px;margin:20px 0;background:#fff;}
.checkbox-card input{width:20px;height:20px;flex:none;margin-top:2px;accent-color:var(--blue);}
.checkbox-card label{font-size:14.5px;line-height:1.5;color:var(--muted);cursor:pointer;}
.checkbox-card label strong{color:var(--ink);}

.rules-block{margin-bottom:18px;}
.rules-subtitle{font-weight:600;color:var(--ink);font-size:15px;margin:22px 0 4px;}
.rule{margin-bottom:16px;}
.rule-title{font-weight:600;color:var(--ink);margin-bottom:3px;font-size:15px;}
.hr{border:none;border-top:1px solid var(--border);margin:20px 0;}
.consent-note{background:#FFF6E9;border:1px solid #F7E3BE;border-radius:12px;
  padding:12px 14px;font-size:13px;color:#8a6a1f;margin-top:14px;}

.sig-block{margin-bottom:26px;}
.sig-label{font-weight:600;color:var(--ink);margin-bottom:8px;font-size:15px;}
.sig-pad-wrap{border:1.5px dashed #C7D3E8;border-radius:14px;background:#FBFCFE;position:relative;}
.sig-pad-wrap canvas{width:100%;height:150px;display:block;touch-action:none;cursor:crosshair;}
.sig-placeholder{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);
  color:#B7C3D9;font-size:13px;pointer-events:none;}
.sig-clear{background:none;border:none;color:var(--blue);font-size:13px;font-weight:600;
  cursor:pointer;margin-top:6px;padding:0;}
.sig-meta{font-size:12.5px;color:#9AA9C2;margin-top:6px;}

.day-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;}
.day-card{border-radius:20px;padding:20px;min-height:150px;}
.day-card.full{grid-column:1 / -1;}
.day-card h3{margin-bottom:10px;font-size:18px;}
.day-card ul{margin:0;padding-left:18px;color:var(--ink);opacity:0.75;font-size:14.5px;}
.day-card li{margin-bottom:4px;}
.day-slot-label{font-size:13px;color:var(--ink);opacity:0.65;margin:10px 0 6px;}
.day-slot-label:first-of-type{margin-top:2px;}
.pill-btn{display:flex;align-items:center;justify-content:center;gap:6px;
  width:100%;border:none;border-radius:12px;padding:10px 10px;font-family:'Poppins',sans-serif;
  font-weight:600;font-size:13.5px;cursor:pointer;color:#fff;}
.pill-btn.choose{background:linear-gradient(180deg,#6BC4FA,#3AA9F5);}
.pill-btn.draft{background:linear-gradient(180deg,#8AA6FB,#6C86F5);}
.pill-btn.confirmed{background:linear-gradient(180deg,#8AA6FB,#6C86F5);}

.course-list{display:flex;flex-direction:column;gap:12px;margin-top:18px;}
.course-row{display:flex;align-items:center;gap:16px;border:1px solid var(--border);
  border-radius:16px;padding:12px;cursor:pointer;background:#fff;transition:box-shadow .15s;}
.course-row:hover{box-shadow:0 4px 14px rgba(31,42,68,0.08);}
.course-thumb{width:64px;height:64px;border-radius:12px;flex:none;display:flex;
  align-items:center;justify-content:center;font-size:28px;overflow:hidden;background:#EEF3FB;}
.course-thumb img{width:100%;height:100%;object-fit:cover;display:block;}
.course-thumb-fallback{background:linear-gradient(135deg,#DCEAFC,#CFF5E7);}
.course-row .course-name{font-family:'Poppins',sans-serif;font-weight:600;color:var(--ink);
  font-size:16px;}
.course-counters{margin-left:auto;display:flex;gap:5px;flex:none;}
.cnt{min-width:24px;height:24px;border-radius:7px;display:flex;align-items:center;
  justify-content:center;font-size:12px;font-weight:700;padding:0 5px;}
.cnt-fraction{background:#fff;border:1.5px solid var(--green);color:var(--green);}
.cnt-fraction.cnt-full{border-color:var(--ink);color:var(--ink);}

.course-hero{border-radius:20px;height:220px;display:flex;align-items:center;justify-content:center;
  font-size:80px;margin-top:18px;overflow:hidden;background:#EEF3FB;}
.course-hero img{width:100%;height:100%;object-fit:cover;display:block;}
.course-hero-fallback{background:linear-gradient(135deg,#DCEAFC,#CFF5E7);}
.course-detail-card{margin-top:-40px;background:#fff;border-radius:20px;padding:22px;
  box-shadow:0 8px 30px rgba(31,42,68,0.1);position:relative;}
.course-detail-counters{display:flex;gap:6px;margin-bottom:12px;}

.reg-row{margin-bottom:18px;}
.reg-row .field-label{margin-bottom:8px;}
.reg-locked{display:flex;align-items:center;justify-content:space-between;gap:10px;
  width:100%;padding:13px 14px;border:1px solid var(--border);border-radius:12px;
  background:#F7FAFF;color:var(--ink);font-size:15px;}
.status-pill{display:inline-flex;align-items:center;flex:none;background:#E1F8EF;color:#1E9E6B;
  font-size:12px;font-weight:700;padding:4px 10px;border-radius:999px;}

.empty-note{color:#9AA9C2;font-size:13.5px;text-align:center;margin-top:30px;}

.modal-overlay{position:fixed;inset:0;background:rgba(31,42,68,0.45);
  display:flex;align-items:center;justify-content:center;padding:24px;z-index:50;}
.modal-card{background:#fff;border-radius:20px;padding:26px;max-width:380px;width:100%;
  max-height:90vh;overflow-y:auto;box-shadow:0 20px 60px rgba(31,42,68,0.25);}
.modal-card h3{margin-bottom:10px;}
.modal-card p{margin-bottom:18px;}

@media (max-width:480px){
  .day-grid{grid-template-columns:1fr;}
  .screen{padding:22px 18px 34px;}
}