:root{--primary:#2f6f73;--primary-dark:#22555a;--primary-light:#e6f1f1;--sidebar:#1c2b33;--sidebar-hover:#263a44;--accent:#e9a23b;--bg:#f3f5f4;--card:#fff;--text:#24323a;--muted:#6d7c84;--border:#e2e7e9;--success:#2f8f57;--success-bg:#e3f4ea;--danger:#c94a44;--danger-bg:#fbe7e6;--warning:#b9771c;--warning-bg:#fdf1dc;--info:#3870c4;--info-bg:#e5eefb;--radius:10px;--shadow:0 1px 3px #1428320f, 0 4px 14px #1428320a}*{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg);color:var(--text);font-family:Nunito Sans,Segoe UI,Arial,sans-serif;font-size:15px;line-height:1.5}button,input,select,textarea{font-family:inherit;font-size:14px}h1,h2,h3,h4{line-height:1.25}.muted{color:var(--muted)}.small{font-size:13px}.empty{text-align:center;color:var(--muted);padding:24px}.btn{cursor:pointer;white-space:nowrap;border:1px solid #0000;border-radius:8px;padding:9px 16px;font-weight:700;transition:background .15s,border-color .15s}.btn-sm{padding:5px 11px;font-size:13px}.btn-block{width:100%}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-dark)}.btn-outline{color:var(--primary);border-color:var(--primary);background:0 0}.btn-outline:hover{background:var(--primary-light)}.btn-light{color:var(--text);border-color:var(--border);background:#fff}.btn-light:hover{background:#f1f4f5}.btn-danger-light{background:var(--danger-bg);color:var(--danger)}.btn-danger-light:hover{background:#f6d3d1}.link-btn{color:var(--primary);cursor:pointer;background:0 0;border:none;font-weight:700}.link-btn:hover{text-decoration:underline}.link-btn.danger{color:var(--danger)}label{color:#44545c;flex-direction:column;gap:5px;font-size:13px;font-weight:700;display:flex}input,select,textarea{border:1px solid var(--border);width:100%;color:var(--text);background:#fbfcfc;border-radius:8px;padding:9px 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1fr;width:100%;max-width:860px;display:grid;overflow:hidden;box-shadow:0 10px 40px #1428321f}.login-side{background:var(--sidebar);color:#fff;flex-direction:column;justify-content:center;padding:44px 36px;display:flex}.login-side h1{margin:18px 0 10px;font-size:28px}.login-campus{aspect-ratio:1000/446;object-fit:cover;background:#2a3a40;border-radius:12px;width:100%;height:auto;margin-bottom:20px}.login-side p{color:#b9c7cd;margin-bottom:22px}.login-side ul{flex-direction:column;gap:10px;list-style:none;display:flex}.login-side li{color:#dce5e8;padding-left:24px;position:relative}.login-side li:before{content:"✓";color:var(--accent);font-weight:800;position:absolute;left:0}.login-form{flex-direction:column;gap:16px;padding:44px 36px;display:flex}.login-form h2{font-size:24px}.login-form .muted{margin-top:-12px}.demo-box{background:var(--primary-light);color:var(--primary-dark);border-radius:8px;flex-direction:column;padding:10px 14px;font-size:13px;display:flex}.app{min-height:100vh;display:flex}.sidebar{background:var(--sidebar);color:#fff;z-index:20;flex-direction:column;width:240px;padding:22px 14px;transition:transform .25s;display:flex;position:fixed;top:0;bottom:0;left:0}.brand{border-bottom:1px solid #2c3f49;align-items:center;gap:12px;margin-bottom:18px;padding:0 8px 22px;display:flex}.brand h2{font-size:18px}.brand span{color:#93a6ae;font-size:12px}.brand-logo{object-fit:contain;background:#fff;border-radius:50%;flex-shrink:0;width:40px;height:40px;padding:2px}.brand-logo.big{width:64px;height:64px}.nav{flex-direction:column;flex:1;gap:4px;display:flex}.nav-link{color:#c3d0d5;text-align:left;cursor:pointer;background:0 0;border:none;border-radius:8px;align-items:center;gap:12px;width:100%;padding:10px 12px;font-weight:600;display:flex}.nav-link:hover{background:var(--sidebar-hover);color:#fff}.nav-link.active{background:var(--primary);color:#fff}.nav-icon{text-align:center;width:22px}.logout{color:#f0a8a3;margin-top:10px}.main{flex:1;min-width:0;margin-left:240px}.topbar{border-bottom:1px solid var(--border);z-index:10;background:#fff;align-items:center;gap:14px;padding:14px 28px;display:flex;position:sticky;top:0}.page-title{flex:1;font-size:20px}.menu-btn{border:1px solid var(--border);cursor:pointer;background:0 0;border-radius:8px;width:38px;height:38px;font-size:20px;display:none}.topbar-right{align-items:center;gap:14px;display:flex}.user-chip{align-items:center;gap:10px;display:flex}.user-info{flex-direction:column;line-height:1.2;display:flex}.user-info strong{font-size:14px}.user-info span{color:var(--muted);font-size:12px}.avatar{background:var(--primary-light);width:38px;height:38px;color:var(--primary-dark);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;font-weight:800;display:flex}.avatar.small{width:32px;height:32px;font-size:14px}.content{padding:26px 28px 40px}.overlay{z-index:15;background:#0a141973;position:fixed;inset:0}.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);margin-bottom:20px;padding:20px}.card-header{justify-content:space-between;align-items:center;gap:10px;margin-bottom:16px;display:flex}.card-header h3{font-size:16px}.form-card{border-top:3px solid var(--primary)}.grid-2{grid-template-columns:1fr 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p{color:#4a5a62;font-size:14px}.notice-bottom{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:10px;margin-top:14px;display:flex}@media (width<=1100px){.stats-grid,.timing-grid{grid-template-columns:repeat(2,1fr)}.announce-layout{grid-template-columns:1fr}.announce-form{position:static}}@media (width<=900px){.sidebar{transform:translate(-100%)}.sidebar.open{transform:translate(0)}.main{margin-left:0}.menu-btn{display:block}.grid-2{grid-template-columns:1fr;gap:0}.grid-2>.card{margin-bottom:20px}.user-info{display:none}}@media (width<=640px){.topbar{padding:12px 16px}.page-title{font-size:17px}.content{padding:18px 16px 30px}.card{padding:16px}.login-card{grid-template-columns:1fr}.login-side{display:none}.login-form{padding:32px 24px}.stats-grid{gap:12px}.stat-card{flex-direction:column;align-items:flex-start;gap:8px;padding:14px}.stat-value{font-size:20px}.search{max-width:none}.toolbar>.btn{width:100%}.complaint-bottom{flex-wrap:wrap;gap:10px}}@media (width<=420px){.timing-grid{grid-template-columns:1fr}.room-summary strong{font-size:20px}.topbar-right .btn{display:none}}.login-switch{background:#eef1f2;border-radius:8px;grid-template-columns:1fr 1fr;padding:4px;display:grid}.login-switch button{color:var(--muted);cursor:pointer;background:0 0;border:none;border-radius:6px;padding:8px;font-weight:700}.login-switch button.active{color:var(--primary);box-shadow:var(--shadow);background:#fff}.alert-info{background:var(--info-bg);color:var(--info)}.pagination{flex-wrap:wrap;justify-content:center;align-items:center;gap:6px;margin-top:22px;display:flex}.pagination .btn:disabled{opacity:.5;cursor:not-allowed}.page-btn{border:1px solid var(--border);cursor:pointer;background:#fff;border-radius:8px;width:34px;height:34px;font-weight:700}.page-btn.active{background:var(--primary);border-color:var(--primary);color:#fff}.summary-note{text-align:center;margin-top:14px}.student-page{min-height:100vh}.student-header{background:var(--sidebar);color:#fff;justify-content:space-between;align-items:center;gap:12px;padding:14px 28px;display:flex}.student-header .brand{border:none;margin:0;padding:0}.student-header-right{align-items:center;gap:14px;display:flex}.student-content{max-width:760px;margin:0 auto;padding:26px 16px 40px}@media (width<=640px){.student-header{padding:12px 16px}.student-header-right span{display:none}}.login-form .student-note{margin-top:0}.demo-fill{align-self:flex-start;margin-top:8px}.address-cell{min-width:180px}.room-select{width:90px;padding:5px 8px}.btn:disabled{opacity:.5;cursor:not-allowed}@keyframes fade-in-up{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}.app,.student-page{animation:.5s ease-out fade-in-up}@media (prefers-reduced-motion:reduce){.app,.student-page{animation:none}}