:root{
    --bg:#080b12;
    --panel:#101522;
    --panel-2:#151b2c;
    --text:#ecf2ff;
    --muted:#9aa8c7;
    --line:rgba(255,255,255,.10);
    --brand:#7c3aed;
    --brand-2:#06b6d4;
    --danger:#ef4444;
    --success:#22c55e;
    --warning:#f59e0b;
    --shadow:0 24px 70px rgba(0,0,0,.35);
}
*{box-sizing:border-box}
body{margin:0;font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:radial-gradient(circle at top left,rgba(124,58,237,.26),transparent 28%),radial-gradient(circle at top right,rgba(6,182,212,.18),transparent 28%),var(--bg);color:var(--text)}
a{text-decoration:none;color:inherit}
.login-page{min-height:100vh;display:grid;place-items:center;padding:24px;overflow:hidden;position:relative}
.login-page:before,.login-page:after{content:"";position:absolute;width:360px;height:360px;border-radius:999px;filter:blur(35px);opacity:.35;animation:float 8s ease-in-out infinite alternate}.login-page:before{background:#7c3aed;left:-120px;top:10%}.login-page:after{background:#06b6d4;right:-140px;bottom:5%;animation-delay:1.2s}@keyframes float{to{transform:translate3d(40px,-30px,0) scale(1.1)}}
.login-card{width:min(100%,440px);position:relative;z-index:2;background:rgba(16,21,34,.78);border:1px solid var(--line);border-radius:28px;padding:34px;box-shadow:var(--shadow);backdrop-filter:blur(18px)}
.logo-mark{width:64px;height:64px;border-radius:22px;background:linear-gradient(135deg,var(--brand),var(--brand-2));display:grid;place-items:center;font-size:28px;font-weight:900;margin-bottom:18px;box-shadow:0 18px 35px rgba(124,58,237,.28)}
.login-card h1{margin:0 0 8px;font-size:30px}.login-card p{color:var(--muted);line-height:1.55;margin:0 0 24px}.login-help{font-size:13px;color:var(--muted);border-top:1px solid var(--line);padding-top:16px;margin-top:20px}.login-help code{color:#fff;background:rgba(255,255,255,.08);border-radius:8px;padding:2px 6px}
.app-shell{display:grid;grid-template-columns:280px 1fr;min-height:100vh}.sidebar{position:sticky;top:0;height:100vh;background:rgba(10,14,25,.88);border-right:1px solid var(--line);padding:24px;display:flex;flex-direction:column;gap:24px;backdrop-filter:blur(20px)}.brand{display:flex;align-items:center;gap:12px}.brand-icon{width:48px;height:48px;border-radius:17px;background:linear-gradient(135deg,var(--brand),var(--brand-2));display:grid;place-items:center;font-weight:900}.brand strong{display:block}.brand span{display:block;color:var(--muted);font-size:13px;margin-top:3px}.menu{display:grid;gap:8px}.menu a{padding:13px 14px;border-radius:14px;color:var(--muted);transition:.2s}.menu a:hover,.menu a.active{background:rgba(255,255,255,.08);color:#fff}.side-footer{margin-top:auto;border-top:1px solid var(--line);padding-top:18px;display:grid;gap:10px}.side-footer span{color:var(--muted);font-size:13px}.side-footer a{color:#fff;background:rgba(239,68,68,.12);border:1px solid rgba(239,68,68,.2);padding:10px 12px;border-radius:12px;text-align:center}.content{padding:28px;max-width:1440px;width:100%;margin:0 auto}.topbar{display:flex;align-items:center;justify-content:space-between;margin-bottom:22px}.topbar h1{margin:0;font-size:30px}.topbar p{margin:6px 0 0;color:var(--muted)}
.grid{display:grid;gap:18px}.grid.cards{grid-template-columns:repeat(4,minmax(0,1fr))}.grid.two{grid-template-columns:repeat(2,minmax(0,1fr))}.card{background:rgba(16,21,34,.78);border:1px solid var(--line);border-radius:24px;padding:22px;box-shadow:0 18px 45px rgba(0,0,0,.20);backdrop-filter:blur(14px)}.metric span{color:var(--muted);font-size:13px}.metric strong{display:block;font-size:30px;margin-top:10px}.card h2,.card h3{margin:0 0 16px}.toolbar{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:16px;flex-wrap:wrap}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;border-radius:13px;padding:11px 15px;font-weight:800;color:#fff;background:linear-gradient(135deg,var(--brand),var(--brand-2));cursor:pointer;box-shadow:0 14px 28px rgba(124,58,237,.18)}.btn.secondary{background:rgba(255,255,255,.08);border:1px solid var(--line);box-shadow:none}.btn.danger{background:rgba(239,68,68,.14);border:1px solid rgba(239,68,68,.25);color:#fecaca;box-shadow:none}.btn.success{background:rgba(34,197,94,.14);border:1px solid rgba(34,197,94,.25);color:#bbf7d0;box-shadow:none}.btn.small{padding:8px 10px;font-size:12px;border-radius:10px}.alert{padding:14px 16px;border-radius:15px;margin:0 0 18px;border:1px solid var(--line)}.alert.success{background:rgba(34,197,94,.12);border-color:rgba(34,197,94,.24);color:#bbf7d0}.alert.error{background:rgba(239,68,68,.12);border-color:rgba(239,68,68,.24);color:#fecaca}
.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:15px}.form-grid .full{grid-column:1/-1}.field label{display:block;color:var(--muted);font-size:13px;margin:0 0 8px}.field input,.field select,.field textarea{width:100%;background:rgba(255,255,255,.06);border:1px solid var(--line);border-radius:14px;color:#fff;padding:13px 14px;outline:none;font:inherit}.field textarea{min-height:110px;resize:vertical}.field input:focus,.field select:focus,.field textarea:focus{border-color:rgba(6,182,212,.55);box-shadow:0 0 0 4px rgba(6,182,212,.10)}.field small{display:block;color:var(--muted);margin-top:6px}.table-wrap{overflow:auto;border-radius:18px;border:1px solid var(--line)}table{width:100%;border-collapse:collapse;min-width:850px;background:rgba(255,255,255,.03)}th,td{padding:14px 13px;text-align:left;border-bottom:1px solid var(--line);vertical-align:middle}th{font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.08em}td{color:#eaf0ff}.actions{display:flex;gap:7px;flex-wrap:wrap}.badge{display:inline-flex;border-radius:999px;padding:6px 10px;font-size:12px;font-weight:800;border:1px solid var(--line);background:rgba(255,255,255,.06)}.badge.open{color:#dbeafe;background:rgba(59,130,246,.13);border-color:rgba(59,130,246,.24)}.badge.paid,.badge.active{color:#bbf7d0;background:rgba(34,197,94,.13);border-color:rgba(34,197,94,.24)}.badge.overdue,.badge.inactive{color:#fecaca;background:rgba(239,68,68,.13);border-color:rgba(239,68,68,.24)}.badge.canceled{color:#fde68a;background:rgba(245,158,11,.13);border-color:rgba(245,158,11,.24)}.muted{color:var(--muted)}.avatar-img{width:66px;height:66px;border-radius:16px;object-fit:cover;border:1px solid var(--line);background:rgba(255,255,255,.06)}.exercise-card{display:grid;grid-template-columns:86px 1fr;gap:14px;align-items:center}.workout-list{display:grid;gap:12px}.workout-item{display:grid;grid-template-columns:50px 1fr auto;gap:12px;align-items:center;background:rgba(255,255,255,.05);border:1px solid var(--line);border-radius:18px;padding:14px}.number{width:38px;height:38px;border-radius:13px;background:rgba(124,58,237,.18);display:grid;place-items:center;font-weight:900}.student-hero{background:linear-gradient(135deg,rgba(124,58,237,.24),rgba(6,182,212,.15));border:1px solid var(--line);border-radius:28px;padding:28px;margin-bottom:20px}.student-hero h2{margin:0 0 8px;font-size:32px}.student-hero p{margin:0;color:var(--muted)}
@media(max-width:1050px){.app-shell{grid-template-columns:1fr}.sidebar{position:relative;height:auto}.content{padding:18px}.grid.cards{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:700px){.login-card{padding:24px;border-radius:22px}.grid.cards,.grid.two,.form-grid{grid-template-columns:1fr}.topbar{display:block}.toolbar{align-items:stretch}.toolbar .btn{width:100%}.table-wrap{border-radius:14px}.sidebar{padding:18px}.menu{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.menu a{text-align:center;font-size:13px}.workout-item{grid-template-columns:1fr}.number{display:none}}