.nb-container{position:relative}.nb-btn{color:#374151;cursor:pointer;background:#f3f4f6;border:1px solid #e5e7eb;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:38px;height:38px;padding:0;transition:background .15s;display:flex;position:relative}.nb-icon{display:block}.nb-btn:hover{background:#e5e7eb}.nb-badge{color:#fff;background:#ef4444;border:2px solid #fff;border-radius:8px;justify-content:center;align-items:center;min-width:16px;height:16px;padding:0 3px;font-size:10px;font-weight:700;display:flex;position:absolute;top:-2px;right:-2px}.nb-panel{z-index:100;background:#fff;border-radius:12px;flex-direction:column;width:340px;max-height:420px;display:flex;position:absolute;top:46px;right:0;overflow:hidden;box-shadow:0 8px 30px #00000026}.nb-header{color:#1e293b;border-bottom:1px solid #f0f0f0;justify-content:space-between;align-items:center;padding:12px 16px;font-size:14px;font-weight:700;display:flex}.nb-mark-all{color:var(--accent,var(--accent));cursor:pointer;background:0 0;border:none;font-size:12px;font-weight:600}.nb-mark-all:hover{text-decoration:underline}.nb-list{max-height:360px;overflow-y:auto}.nb-empty{text-align:center;color:#9ca3af;padding:32px 16px;font-size:13px}.nb-item{cursor:default;border-bottom:1px solid #f9f9f9;align-items:flex-start;gap:10px;padding:12px 16px;display:flex;position:relative}.nb-item.unread{background:var(--accent-light,var(--accent-light));cursor:pointer}.nb-item:last-child{border-bottom:none}.nb-item-icon{flex-shrink:0;margin-top:1px;font-size:16px}.nb-item-body{flex:1;min-width:0}.nb-item-message{color:#374151;font-size:13px;line-height:1.4}.nb-item-time{color:#9ca3af;margin-top:3px;font-size:11px}.nb-dot{background:var(--accent,var(--accent));border-radius:50%;flex-shrink:0;width:8px;height:8px;margin-top:5px}.admin-container{background:var(--bg);min-height:100vh;display:flex}.sidebar{background:var(--header-bg);z-index:100;flex-direction:column;width:220px;min-height:100vh;display:flex;position:fixed;top:0;left:0}.sidebar-nav{flex-direction:column;gap:4px;padding:16px 12px;display:flex}.main-wrapper{flex-direction:column;flex:1;min-width:0;min-height:100vh;margin-left:220px;display:flex}.topbar{border-bottom:1px solid var(--border);z-index:99;background:#16233d;justify-content:space-between;align-items:center;height:64px;padding:0 24px;display:flex;position:sticky;top:0}.topbar-left .page-title{color:#fff;font-size:18px;font-weight:700}.btn-logout{border:1px solid var(--border);color:#fff;cursor:pointer;background:0 0;border-radius:8px;padding:8px 14px;font-size:13px;font-weight:600;transition:background .15s}.admin-profile{cursor:pointer;align-items:center;gap:10px;display:flex}.admin-name{color:#fff;font-size:13px;font-weight:600}.admin-role{color:#fff;font-size:11px}.main-content{flex:1;padding:24px}.bottom-nav{background:var(--surface);border-top:1px solid var(--border);padding:6px 4px calc(6px + env(safe-area-inset-bottom,0px));z-index:99;display:none;position:fixed;bottom:0;left:0;right:0}.bottom-nav-item{color:var(--text-secondary);border-radius:10px;flex-direction:column;flex:1;align-items:center;gap:3px;padding:6px 2px;font-size:10.5px;font-weight:600;text-decoration:none;display:flex}@media (width<=860px){.sidebar{display:none}.main-wrapper{margin-left:0}.topbar{display:none}.mobile-header,.bottom-nav{display:flex}.main-content{padding:16px 16px calc(84px + env(safe-area-inset-bottom,0px))}}*{box-sizing:border-box;margin:0;padding:0;font-family:Segoe UI,sans-serif}.student-container{background:var(--bg);min-height:100vh;display:flex}.student-sidebar{background:var(--header-bg);z-index:100;flex-direction:column;width:220px;min-height:100vh;display:flex;position:fixed;top:0;left:0}.sidebar-logo{color:#fff;border-bottom:1px solid #ffffff1a;align-items:center;gap:10px;padding:24px 20px;display:flex}.logo-icon{font-size:22px}.logo-text{color:#fff;font-size:18px;font-weight:700}.sidebar-nav{flex-direction:column;flex:1;gap:4px;padding:16px 12px;display:flex}.nav-item{color:#ffffffa6;border-radius:10px;align-items:center;gap:12px;padding:12px 16px;font-size:14px;font-weight:500;text-decoration:none;transition:all .2s;display:flex}.nav-item:hover{color:#fff;background:#ffffff14}.nav-item.active{background:var(--accent);color:#fff}.nav-icon{flex-shrink:0}.sidebar-bottom{border-top:1px solid #ffffff1a;padding:12px}.logout{color:#ff6464cc!important}.logout:hover{color:#ff6b6b!important;background:#ff64641a!important}.student-main-wrapper{flex-direction:column;flex:1;min-width:0;min-height:100vh;margin-left:220px;display:flex}.student-topbar{z-index:99;background:#16233d;border-bottom:1px solid #e5e7eb;justify-content:space-between;align-items:center;height:64px;padding:0 24px;display:flex;position:sticky;top:0}.topbar-title{color:#fff;font-size:18px;font-weight:700}.topbar-right{align-items:center;gap:16px;display:flex}.notif-btn{cursor:pointer;background:0 0;border:none;font-size:20px}.btn-logout{color:#fff;cursor:pointer;background:0 0;border:1px solid #e5e7eb;border-radius:8px;padding:8px 14px;font-size:13px;font-weight:600;transition:background .15s}.btn-logout:hover{background:#f3f4f6}.student-profile{cursor:pointer;align-items:center;gap:10px;display:flex}.student-name{color:#f9fafc;font-size:13px;font-weight:600}.student-role{color:#fff;font-size:11px}.student-main-content{flex:1;padding:24px}.mobile-header{background:var(--header-bg);color:#fff;z-index:99;justify-content:space-between;align-items:center;padding:14px 18px;display:none;position:sticky;top:0}.mobile-header-brand{align-items:center;gap:8px;font-size:17px;font-weight:700;display:flex}.mobile-header .nb-btn{color:#fff;background:#ffffff24;border-color:#fff3}.mobile-header .nb-btn:hover{background:#ffffff38}.bottom-nav{padding:6px 4px calc(6px + env(safe-area-inset-bottom,0px));z-index:99;background:#fff;border-top:1px solid #e5e7eb;display:none;position:fixed;bottom:0;left:0;right:0}.bottom-nav-item{color:#888;text-align:center;border-radius:10px;flex-direction:column;flex:1;align-items:center;gap:3px;padding:6px 2px;font-size:10.5px;font-weight:600;text-decoration:none;display:flex}.bottom-nav-item.active{color:var(--accent-dark)}@media (width<=860px){.student-sidebar{display:none}.student-main-wrapper{margin-left:0}.student-topbar{display:none}.mobile-header,.bottom-nav{display:flex}.student-main-content{padding:16px 16px calc(84px + env(safe-area-inset-bottom,0px))}}:root{--bg:#eaf0f7;--surface:#fff;--surface-alt:#f4f8fc;--header-bg:#16233d;--header-bg-alt:#1f3358;--accent:#3d6fa3;--accent-dark:#2c5580;--accent-light:#dbe7f3;--text-primary:#1c2a3a;--text-secondary:#6b7a8d;--text-on-accent:#fff;--border:#dde5ee;--success:#0f9d64;--success-bg:#d9f3e6;--warning:#b5790a;--warning-bg:#faedd2;--danger:#c23b3b;--danger-bg:#fbe3e3;--radius:14px;--shadow:0 2px 10px #1c2a3a0f}input,select,textarea{transition:border-color .18s,box-shadow .18s}input:focus-visible,select:focus-visible,textarea:focus-visible,input:focus,select:focus,textarea:focus{border-color:var(--accent);outline:none;box-shadow:0 0 0 3px #3d6fa324}button{transition:transform .12s,box-shadow .12s,opacity .12s}button:active:not(:disabled){transform:scale(.97)}.page-bg{background:linear-gradient(#eaf0f780, #eaf0f780), var(--page-bg-image) center top / cover no-repeat;background-attachment:local,fixed;border-radius:18px;padding:24px}@media (width<=768px){.page-bg{background-attachment:local,scroll;padding:14px}}.page-title,.dash-title,.sd-title,.av-title,.page-sub,.dash-sub{text-shadow:0 1px 2px #ffffffd9,0 1px 12px #fff9}.dash-card,.table-card,.ranking-card,.settings-card,.fb-card,.ge-card,.av-card,.av-empty,.gl-card,.sd-card{-webkit-backdrop-filter:blur(10px);background:#ffffffb8!important;border:2px solid #000!important;box-shadow:0 4px 2px 3px #1614144d!important}@media (prefers-reduced-motion:reduce){button:active:not(:disabled){transform:none}}