:root{--primary: #0c233e;--bg: #f5f7fb;--card: #f5f7fb;--text: #222;--secondary: #ff7b00;--hover: #11315c}*{box-sizing:border-box}body{margin:0;font-family:Inter,sans-serif;background:var(--bg);color:var(--text)}.app-layout{display:flex;min-height:100vh}.sidebar{width:250px;background:var(--primary);padding:16px;position:fixed;top:0;bottom:0;left:0;transition:transform .25s ease;z-index:40}.sidebar.open{transform:translate(0)}.sidebar .close{display:none}.sidebar h2{font-size:1.4rem;margin-bottom:30px;text-align:center;color:var(--secondary)}.sidebar nav{display:flex;flex-direction:column;gap:10px}.sidebar a{color:#fff;text-decoration:none;padding:8px 12px;border-radius:6px;transition:background .3s}.sidebar a.active,.sidebar a:hover{background:var(--hover)}.main{margin-left:250px;flex:1;display:flex;flex-direction:column;min-height:100vh;transition:margin-left .25s}@media(max-width:900px){.main{margin-left:0;width:100%}}.header{display:flex;align-items:center;justify-content:space-between;padding:12px 20px;background:var(--primary);border-bottom:1px solid #eee}.user-menu{position:relative}.user-button{background:none;border:none;color:#fff;display:flex;align-items:center;gap:.5rem;cursor:pointer;font-size:1rem}.user-icon{font-size:1.5rem}.dropdown-admin{position:absolute;top:100%;right:0;background:#fff;color:#333;border-radius:6px;box-shadow:0 4px 8px #00000026;margin-top:.5rem;min-width:160px;overflow:hidden;animation:fadeInLogOut .2s ease-in-out}.logout-button{width:100%;text-align:left;padding:.75rem 1rem;background:none;border:none;cursor:pointer;color:#333;font-size:.95rem;display:flex;align-items:center;gap:.5rem}.header-title{font-size:1.4rem;font-weight:600;color:#fff;margin:7px}.logout-button:hover{background:#f0f0f0;color:#e63946}@keyframes fadeInLogOut{0%{opacity:0;transform:translateY(-5px)}to{opacity:1;transform:translateY(0)}}.content{padding:20px;flex:1}.footer{padding:10px 20px;background:var(--primary);border-top:1px solid #eee;text-align:center;color:#fff}.card{background:var(--card);padding:16px;border-radius:8px;box-shadow:0 1px 3px #0000000a}.page-center{min-height:100vh;display:flex;align-items:center;justify-content:center;background:var(--bg);padding:20px}form.card{width:100%;max-width:420px}input,select{width:100%;padding:8px 10px;margin:6px 0 12px;border-radius:6px;border:1px solid #ddd}.btn{background:var(--primary);color:#fff;border:0;padding:8px 12px;border-radius:6px;cursor:pointer}.btn.secondary{background:#eee;color:#333}.btn.danger{background:#e53e3e}.icon-btn{padding:6px;border-radius:6px}.header .icon-btn{display:none}.table{width:100%;border-collapse:collapse;margin-top:12px}.table th,.table td{padding:10px;border-bottom:1px solid #f0f0f0;text-align:left}.actions{display:flex;gap:8px}.card-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}.alert{background:#ffecec;padding:8px;border-radius:6px;color:#900;margin-bottom:10px}.modal{background:var(--card);padding:16px;max-width:520px;margin:40px auto;border-radius:8px;outline:none}.overlay{background:#0006;position:fixed;inset:0;display:flex;align-items:flex-start;justify-content:center;padding:20px}.center{display:flex;align-items:center;justify-content:center;min-height:100vh}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px 16px;align-items:center}.admin-attendance{display:grid;grid-template-columns:1fr 1fr 1fr;width:100%;gap:10px}.card{width:100%;overflow-x:auto;overflow-y:hidden;-webkit-overflow-scrolling:touch;background-color:#fff;border-radius:8px;box-shadow:0 2px 8px #0000000d}.table{width:100%;min-width:900px;border-collapse:collapse;table-layout:auto}.table th{background-color:#f5f6f8;text-align:left;padding:10px 12px;font-weight:600;border-bottom:2px solid #e2e2e2;white-space:nowrap}.table td{padding:10px 12px;border-bottom:1px solid #eaeaea;white-space:nowrap}.table tr:hover{background-color:#fafafa}.table a{color:#007bff;text-decoration:none}.table a:hover{text-decoration:underline}@media(max-width:900px){.sidebar{width:80%;transform:translate(-110%)}.sidebar .close{display:block;margin-left:auto}.header .icon-btn{display:block}.admin-attendance{display:grid;grid-template-columns:48% 48%;width:100%;gap:10px}.card{border-radius:0;box-shadow:none}.table{min-width:700px}.table th,.table td{padding:8px;font-size:14px}.header-title{display:none}}