:root{--navy:#10233f;--navy2:#18385f;--blue:#2d6cdf;--cyan:#15a5c7;--green:#1f9d70;--orange:#f08c46;--red:#d94b5b;--bg:#f4f7fb;--card:#fff;--text:#1d2b3f;--muted:#6c7a90;--border:#dfe6ef;--shadow:0 12px 30px rgba(25,43,70,.08)}
*{box-sizing:border-box}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:var(--bg);color:var(--text);font-size:14px}.app{min-height:100vh;display:flex}.sidebar{width:270px;background:linear-gradient(180deg,var(--navy),#0b182c);color:#fff;padding:24px 16px;position:fixed;inset:0 auto 0 0;overflow-y:auto;z-index:30}.brand{display:flex;align-items:center;gap:12px;padding:0 8px 24px;border-bottom:1px solid rgba(255,255,255,.12)}.brand-mark{width:44px;height:44px;border-radius:14px;background:linear-gradient(135deg,#58d8e6,#4175ef);display:grid;place-items:center;font-weight:900;font-size:18px;box-shadow:0 10px 24px rgba(46,126,255,.28)}.brand h1{font-size:17px;margin:0}.brand small{opacity:.7}.nav-label{font-size:10px;letter-spacing:.14em;text-transform:uppercase;opacity:.5;padding:22px 12px 8px}.nav a{display:flex;align-items:center;gap:11px;color:rgba(255,255,255,.82);text-decoration:none;padding:11px 12px;border-radius:10px;margin:3px 0}.nav a:hover,.nav a.active{color:#fff;background:rgba(255,255,255,.12)}.nav .ico{width:24px;text-align:center}.main{margin-left:270px;min-width:0;width:calc(100% - 270px)}.topbar{height:76px;background:rgba(255,255,255,.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;padding:0 28px;position:sticky;top:0;z-index:20}.topbar h2{font-size:19px;margin:0}.user-chip{display:flex;align-items:center;gap:10px}.avatar{width:38px;height:38px;border-radius:50%;background:#e8effc;color:var(--blue);display:grid;place-items:center;font-weight:800}.content{padding:28px}.page-head{display:flex;justify-content:space-between;align-items:flex-start;gap:20px;margin-bottom:22px}.page-head h3{font-size:25px;margin:0 0 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15px;font-weight:700;cursor:pointer;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;gap:7px;font-size:14px}.btn-primary{background:linear-gradient(135deg,var(--blue),#4b84ec);color:#fff}.btn-secondary{background:#eef2f7;color:#31445e}.btn-success{background:var(--green);color:#fff}.btn-danger{background:var(--red);color:#fff}.btn-outline{background:#fff;color:var(--navy2);border:1px solid var(--border)}.btn-sm{padding:7px 10px;font-size:12px}.actions{display:flex;gap:8px;flex-wrap:wrap}.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.form-group{display:flex;flex-direction:column;gap:7px}.form-group.full{grid-column:1/-1}.form-label{font-weight:700}.form-control,.form-select,textarea{width:100%;border:1px solid #ccd6e3;border-radius:10px;padding:10px 12px;background:#fff;color:var(--text);font:inherit;outline:none}.form-control:focus,.form-select:focus,textarea:focus{border-color:#6d99ea;box-shadow:0 0 0 3px rgba(45,108,223,.12)}textarea{min-height:100px;resize:vertical}.periods{display:flex;gap:8px;flex-wrap:wrap}.period-check input{display:none}.period-check span{width:38px;height:38px;border:1px solid var(--border);border-radius:9px;display:grid;place-items:center;background:#fff;font-weight:800;cursor:pointer}.period-check input:checked+span{background:var(--blue);border-color:var(--blue);color:#fff}.table-wrap{overflow:auto;border:1px solid var(--border);border-radius:13px}.table{width:100%;border-collapse:collapse;min-width:760px;background:#fff}.table th,.table td{padding:12px 14px;text-align:left;border-bottom:1px solid var(--border);vertical-align:top}.table th{font-size:11px;text-transform:uppercase;letter-spacing:.06em;background:#f8fafc;color:#64748b}.table tr:last-child td{border-bottom:0}.badge{display:inline-flex;align-items:center;padding:5px 9px;border-radius:999px;font-size:11px;font-weight:800;background:#eaf0ff;color:var(--blue)}.badge.green{background:#e8f8f2;color:#167b58}.badge.orange{background:#fff2e8;color:#b8662d}.badge.red{background:#ffecef;color:#b63545}.badge.gray{background:#edf1f5;color:#667085}.alert{padding:13px 15px;border-radius:11px;margin-bottom:14px;border:1px solid}.alert-success{background:#ecf9f3;border-color:#bfe9d7;color:#176b4d}.alert-danger{background:#fff0f2;border-color:#f6c7cf;color:#9f2e3d}.alert-warning{background:#fff8e8;border-color:#f3dfa8;color:#80611a}.alert-info{background:#edf5ff;border-color:#c7dcfa;color:#285b9a}.empty{padding:36px;text-align:center;color:var(--muted)}.filter-bar{display:flex;gap:10px;align-items:end;flex-wrap:wrap;margin-bottom:16px}.filter-bar .form-group{min-width:150px;flex:1}.search-list{border:1px solid var(--border);border-radius:12px;max-height:320px;overflow:auto}.student-row{display:grid;grid-template-columns:34px 1fr 110px;gap:10px;align-items:center;padding:10px 12px;border-bottom:1px solid var(--border)}.student-row:last-child{border-bottom:0}.student-row:hover{background:#f8fbff}.student-row select{padding:7px;border:1px solid var(--border);border-radius:8px}.login-page{min-height:100vh;display:grid;grid-template-columns:1.15fr .85fr;background:#edf3fa}.login-visual{background:linear-gradient(145deg,#0f2544,#1d5b8e 58%,#23a9b4);color:#fff;padding:70px;display:flex;flex-direction:column;justify-content:space-between;position:relative;overflow:hidden}.login-visual:after{content:"";position:absolute;width:460px;height:460px;border-radius:50%;border:90px solid rgba(255,255,255,.06);right:-170px;bottom:-160px}.login-visual h1{font-size:46px;line-height:1.1;margin:18px 0}.login-card-wrap{display:grid;place-items:center;padding:35px}.login-card{width:min(440px,100%);background:#fff;border-radius:22px;padding:34px;box-shadow:0 28px 70px rgba(30,50,80,.15)}.login-card h2{font-size:27px;margin:0 0 8px}.login-card .form-group{margin:18px 0}.week-warning{background:linear-gradient(135deg,#fff7e6,#fff);border:1px solid #f2d9a4}.timeline{display:flex;flex-direction:column;gap:12px}.timeline-item{display:flex;gap:12px}.timeline-dot{width:10px;height:10px;background:var(--blue);border-radius:50%;margin-top:5px;box-shadow:0 0 0 5px #eaf0ff}.mobile-toggle{display:none}.print-only{display:none}
@media(max-width:1100px){.grid-4{grid-template-columns:repeat(2,1fr)}.grid-3{grid-template-columns:repeat(2,1fr)}}
@media(max-width:780px){.sidebar{transform:translateX(-100%);transition:.25s}.sidebar.open{transform:translateX(0)}.main{margin-left:0;width:100%}.mobile-toggle{display:inline-flex}.content{padding:18px}.topbar{padding:0 16px}.grid-4,.grid-3,.grid-2,.form-grid{grid-template-columns:1fr}.page-head{flex-direction:column}.login-page{grid-template-columns:1fr}.login-visual{display:none}.student-row{grid-template-columns:30px 1fr}.student-row select{grid-column:2}.topbar .user-chip .muted{display:none}}
@media print{.sidebar,.topbar,.no-print,.btn,.filter-bar{display:none!important}.main{margin:0;width:100%}.content{padding:0}.card{box-shadow:none;border:0}.print-only{display:block}.table{min-width:0;font-size:11px}body{background:#fff}}