@import url('https://fonts.googleapis.com/css2?family=Hind+Siliguri:wght@400;500;600;700&family=Inter:wght@400;500;600;700&display=swap');
:root{--ink:#18383a;--muted:#6b7d7e;--teal:#0b4f53;--teal2:#1f7778;--bg:#f4f7f6;--card:#fff;--line:#dfe8e7;--danger:#b43d45;--shadow:0 8px 30px rgba(16,53,55,.07)}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:'Hind Siliguri','Noto Sans Bengali',sans-serif}button,input,select,textarea{font:inherit}button{cursor:pointer}.login-page{min-height:100vh;display:grid;place-items:center;padding:20px}.login-card{width:min(440px,100%);background:#fff;border:1px solid var(--line);border-radius:20px;padding:30px;box-shadow:var(--shadow)}.login-card.wide{width:min(720px,100%)}.brand,.sidebrand{display:flex;gap:12px;align-items:center}.brand-mark,.sidebrand b{width:48px;height:48px;border-radius:14px;background:var(--teal);color:white;display:grid;place-items:center;font-family:Inter;font-weight:700}.brand h1{font-size:25px;margin:0}.brand p{margin:0;color:var(--muted)}label{display:block;font-weight:600;margin:12px 0}input,select,textarea{width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:10px;background:#fff;color:var(--ink);margin-top:6px}textarea{min-height:90px}.btn{border:0;border-radius:10px;padding:10px 16px;font-weight:600}.primary{background:var(--teal);color:#fff}.danger{background:#fff0f0;color:var(--danger)}.hint,.msg{color:var(--muted);font-size:14px}.error{padding:10px;background:#fff0f0;color:#a42f37;border-radius:10px}.success{padding:14px;background:#eef8f4;border-radius:10px}.shell{display:flex;min-height:100vh}.sidebar{width:240px;background:#0c4548;color:#fff;padding:18px;display:flex;flex-direction:column}.sidebrand{margin-bottom:20px}.sidebrand span{font-family:Inter;font-size:15px}.sidebar nav{display:grid;gap:6px}.sidebar nav button,.logout{border:0;background:transparent;color:#e6f2f1;text-align:left;padding:11px 12px;border-radius:9px;text-decoration:none}.sidebar nav button:hover,.sidebar nav button.active{background:rgba(255,255,255,.12)}.logout{margin-top:auto}.main{flex:1;min-width:0}.top{height:64px;background:#fff;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:10px;padding:0 24px;position:sticky;top:0;z-index:5}.top small{color:var(--muted)}.iconbtn{display:none;border:0;background:transparent;font-size:22px}.badge{margin-left:auto;border-radius:20px;padding:4px 10px;font:12px Inter;background:#eef8f4;color:#23705b}.content{padding:24px}.page-head{display:flex;justify-content:space-between;gap:12px;align-items:center;margin-bottom:18px}.page-head h2{margin:0;font-size:25px}.cards{display:grid;grid-template-columns:repeat(4,1fr);gap:15px}.stat{background:#fff;border:1px solid var(--line);border-radius:15px;padding:18px;box-shadow:var(--shadow)}.stat small{color:var(--muted)}.stat strong{display:block;font:700 30px Inter;margin-top:8px}.grid2{display:grid;grid-template-columns:1fr 1fr;gap:4px 16px}.panel{background:#fff;border:1px solid var(--line);border-radius:15px;padding:18px;margin-bottom:16px;box-shadow:var(--shadow)}.table-wrap{overflow:auto}.table{width:100%;border-collapse:collapse}.table th,.table td{padding:10px;border-bottom:1px solid var(--line);text-align:left;white-space:nowrap}.table th{font-size:13px;color:var(--muted)}.toolbar{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:14px}.toolbar>*{width:auto;margin:0}.teacher-card{display:flex;gap:12px;align-items:center}.avatar{width:44px;height:44px;border-radius:50%;background:#d9ecea;display:grid;place-items:center;font-weight:700}.print-area{background:#fff;padding:30px;max-width:900px;margin:auto}.certificate{border:2px solid #234f51;padding:50px;text-align:center;min-height:600px}.certificate h1{font-size:30px}.certificate p{font-size:18px;line-height:1.8}.idcard{width:86mm;height:54mm;border:1px solid #244f52;border-radius:5mm;padding:5mm;display:flex;gap:4mm;align-items:center;background:#fff}.idcard .avatar{width:24mm;height:28mm;border-radius:2mm}.no-print{display:block}@media(max-width:900px){.sidebar{position:fixed;left:-250px;top:0;bottom:0;z-index:20;transition:.2s}.sidebar.open{left:0}.iconbtn{display:block}.cards{grid-template-columns:repeat(2,1fr)}.content{padding:16px}.grid2{grid-template-columns:1fr}}@media(max-width:520px){.cards{grid-template-columns:1fr}.login-card{padding:20px}.top{padding:0 12px}.page-head{align-items:flex-start;flex-direction:column}}@media print{body{background:#fff}.sidebar,.top,.no-print{display:none!important}.main{width:100%}.content{padding:0}.print-area{max-width:none;padding:0}.certificate{border:2px solid #000;min-height:90vh}}