:root{
  --blue:#2438e8;
  --blue-2:#0f4bd8;
  --blue-3:#061a7a;
  --cyan:#36b7ff;
  --navy:#0b132f;
  --text:#11182f;
  --muted:#64718a;
  --line:#dbe5f5;
  --soft:#f5f8ff;
  --white:#ffffff;
  --danger:#c40f47;
  --success:#119653;
  --shadow:0 28px 70px rgba(13,34,95,.12);
  --radius:22px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:Inter,Segoe UI,Roboto,Arial,sans-serif;
  color:var(--text);
  background:
    radial-gradient(circle at top left,rgba(36,56,232,.10),transparent 32%),
    linear-gradient(180deg,#ffffff 0%,#f7faff 100%);
  min-height:100vh;
}
a{color:inherit;text-decoration:none}
button,input,select{font:inherit}
.container{width:min(1080px,calc(100% - 28px));margin:0 auto}
.page-center{min-height:100vh;display:flex;align-items:flex-start;justify-content:center;padding:62px 0}
.logo{display:block;width:74px;height:74px;object-fit:contain;margin:0 auto 14px;filter:drop-shadow(0 10px 18px rgba(36,56,232,.22))}
.logo-small{width:56px;height:56px;object-fit:contain;filter:drop-shadow(0 7px 14px rgba(36,56,232,.18))}
.hero-title{text-align:center;margin:0;font-size:42px;line-height:1;font-weight:900;letter-spacing:-1.8px;color:#0c1428}
.hero-sub{text-align:center;margin:14px auto 22px;max-width:520px;color:#5d6a80;font-size:15px;line-height:1.45}
.form-shell{width:min(560px,100%);margin:0 auto;background:rgba(255,255,255,.94);border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow);backdrop-filter:blur(14px)}
.progress{height:6px;background:#edf3fd;border-radius:999px;margin-bottom:18px;overflow:hidden}
.progress span{display:block;width:28%;height:100%;background:linear-gradient(90deg,var(--cyan),var(--blue));border-radius:999px}
.section-title{display:flex;align-items:center;gap:10px;font-size:16px;font-weight:900;margin:16px 0 12px;color:#0e1730}
.badge-number{width:25px;height:25px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--blue),var(--blue-3));color:#fff;font-size:13px;font-weight:900;box-shadow:0 8px 16px rgba(36,56,232,.22)}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.field{display:flex;flex-direction:column;gap:7px;margin-bottom:12px}
.field.full{grid-column:1/-1}
label{font-size:12px;font-weight:800;color:#101a34}
input,select{
  width:100%;height:42px;border:1px solid #d7e1f0;border-radius:10px;background:#fff;color:#17213b;padding:0 13px;outline:none;transition:.16s ease;
}
input:focus,select:focus{border-color:#3058e8;box-shadow:0 0 0 4px rgba(36,56,232,.10)}
input::placeholder{color:#9aa8bd}
.btn{height:45px;border:0;border-radius:11px;display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:0 18px;font-weight:900;cursor:pointer;transition:.18s ease;white-space:nowrap}
.btn-primary{width:100%;background:linear-gradient(135deg,var(--blue),var(--blue-3));color:#fff;box-shadow:0 16px 30px rgba(36,56,232,.25)}
.btn-primary:hover{transform:translateY(-1px);filter:saturate(1.08)}
.btn-outline{background:#fff;color:#123cae;border:1px solid var(--line)}
.btn-outline:hover{border-color:#b8c8ed;box-shadow:0 8px 18px rgba(15,42,99,.08)}
.btn-danger{background:#c40f47;color:#fff}
.btn-small{height:38px;border-radius:9px;font-size:13px;padding:0 14px}
.security{text-align:center;margin-top:12px;color:#6a778d;font-size:12px;display:flex;align-items:center;justify-content:center;gap:7px}
.security b{color:#07935b}
.topbar{padding:42px 0 22px}
.admin-head{display:flex;align-items:center;justify-content:space-between;gap:20px}
.admin-brand{display:flex;align-items:center;gap:16px}
.admin-brand h1{font-size:31px;line-height:1;margin:0;font-weight:950;letter-spacing:-1.4px}
.admin-brand p{margin:7px 0 0;color:#5f6e85;font-size:15px}
.master-tag{color:#123caa;font-weight:900}
.nav{display:flex;align-items:center;gap:10px;flex-wrap:wrap;justify-content:flex-end}
.nav a,.nav button{height:42px;border-radius:12px;border:1px solid var(--line);background:#fff;padding:0 18px;color:#113aa8;font-weight:900;display:inline-flex;align-items:center;cursor:pointer}
.nav a.active{background:linear-gradient(135deg,var(--blue),var(--blue-3));color:#fff;border-color:transparent;box-shadow:0 12px 24px rgba(36,56,232,.18)}
.nav .exit{color:#c40f47}
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:14px 0 22px}
.stat-card{background:#fff;border:1px solid var(--line);border-radius:20px;padding:23px;box-shadow:0 18px 50px rgba(13,34,95,.07)}
.stat-card span{display:block;color:#66758b;font-weight:800;font-size:13px;margin-bottom:8px}
.stat-card strong{font-size:31px;line-height:1;color:#153fb9;font-weight:950}.stat-card strong.green{color:var(--success)}
.panel{background:#fff;border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow);overflow:hidden;margin-bottom:38px}
.panel-head{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:22px 22px 18px;border-bottom:1px solid var(--line)}
.panel-head h2{margin:0;font-size:22px;letter-spacing:-.7px}.panel-head p{margin:5px 0 0;color:#65748a;font-size:13px}.panel-head .search{width:min(360px,100%)}
.table-wrap{overflow-x:auto}.table{width:100%;border-collapse:collapse;min-width:850px}.table th{background:#f6f9fe;color:#53647d;text-align:left;font-size:12px;letter-spacing:.08em;text-transform:uppercase;padding:16px 18px}.table td{padding:18px;border-top:1px solid #e8eef8;vertical-align:middle;font-size:14px}.table td strong{font-size:15px;color:#0d1730}.table small{display:block;color:#6f7c90;margin-top:4px}.pill{display:inline-flex;align-items:center;border-radius:999px;background:#edf4ff;color:#0d3db2;padding:6px 10px;font-size:12px;font-weight:900;max-width:280px;white-space:normal}.pill-master{background:#fff2e7;color:#9b4704}.actions{display:flex;gap:8px;flex-direction:column;align-items:flex-start}.inline-form{display:inline}.empty{padding:34px;text-align:center;color:#6a778d}.login-card{width:min(430px,calc(100% - 28px));margin:80px auto;background:#fff;border:1px solid var(--line);border-radius:22px;padding:28px;box-shadow:var(--shadow)}.login-card h1{text-align:center;font-size:30px;margin:0 0 8px;font-weight:950}.login-card p{text-align:center;color:#66758b;margin:0 0 20px}.alert{border-radius:14px;padding:13px 15px;margin:0 0 14px;font-weight:800;font-size:13px}.alert-error{background:#fff0f3;color:#b0063b;border:1px solid #ffd0dd}.alert-ok{background:#ecfff5;color:#087347;border:1px solid #bdeed8}.detail-wrap{width:min(820px,calc(100% - 28px));margin:0 auto 50px}.detail-head{display:flex;align-items:center;justify-content:space-between;gap:16px;margin:42px 0 22px}.detail-brand{display:flex;align-items:center;gap:16px}.detail-brand h1{font-size:28px;margin:0;letter-spacing:-1px}.detail-brand p{margin:5px 0 0;color:#66758b}.student-card{background:#fff;border:1px solid var(--line);border-radius:22px;overflow:hidden;box-shadow:var(--shadow)}.student-hero{background:linear-gradient(135deg,var(--blue),var(--blue-3));color:#fff;padding:28px}.student-hero .date-badge{display:inline-flex;padding:8px 12px;border-radius:999px;background:rgba(255,255,255,.16);font-size:12px;font-weight:900;margin-bottom:14px}.student-hero h2{font-size:31px;line-height:1.1;margin:0 0 8px;text-transform:uppercase}.student-hero p{margin:0;color:rgba(255,255,255,.85)}.student-body{padding:24px;display:grid;grid-template-columns:1fr 1fr;gap:14px}.info-box{border:1px solid #e2e9f4;border-radius:15px;padding:16px;background:#fff}.info-box.full{grid-column:1/-1}.info-box span{display:block;font-size:11px;text-transform:uppercase;letter-spacing:.08em;color:#62718a;font-weight:900;margin-bottom:8px}.info-box strong{font-size:16px;line-height:1.3}.student-actions{padding:0 24px 24px;display:flex;gap:10px;flex-wrap:wrap}.user-form{display:grid;grid-template-columns:1.1fr 1.1fr .9fr 1.1fr auto;gap:10px;align-items:end;padding:18px;border:1px solid #e4ebf6;border-radius:18px;margin:20px 20px 8px;background:#fbfdff}.user-form .field{margin:0}.user-row-actions{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.user-row-actions input,.user-row-actions select{height:38px;min-width:150px}.success-card{width:min(560px,calc(100% - 28px));text-align:center;margin:80px auto;background:#fff;border:1px solid var(--line);border-radius:24px;padding:34px;box-shadow:var(--shadow)}.success-card h1{font-size:32px;margin:0 0 12px}.success-card p{color:#65748a;line-height:1.5}.success-icon{width:66px;height:66px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--blue),var(--blue-3));color:#fff;font-size:32px;font-weight:950;margin:0 auto 14px}
@media(max-width:850px){.page-center{padding:32px 0}.hero-title{font-size:33px}.form-shell{padding:18px}.form-grid,.stats,.student-body{grid-template-columns:1fr}.admin-head,.panel-head,.detail-head{align-items:flex-start;flex-direction:column}.nav{justify-content:flex-start}.user-form{grid-template-columns:1fr}.table{min-width:760px}.student-hero h2{font-size:24px}.topbar{padding:28px 0 14px}}