@import "https://fonts.googleapis.com/css2?family=IBM+Plex+Sans+Arabic:wght@300;400;500;600;700&display=swap";:root{--primary:#2563eb;--primary-hover:#1d4ed8;--primary-light:#eff6ff;--secondary:#64748b;--success:#10b981;--danger:#ef4444;--warning:#f59e0b;--bg-main:#f8fafc;--bg-card:#fff;--bg-gradient:linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);--text-main:#1e293b;--text-muted:#64748b;--text-light:#94a3b8;--border:#e2e8f0;--radius-sm:6px;--radius-md:12px;--radius-lg:20px;--shadow-sm:0 1px 3px #0000001a;--shadow-md:0 4px 6px -1px #0000001a, 0 2px 4px -1px #0000000f;--shadow-lg:0 10px 25px -5px #0000001a, 0 8px 10px -6px #0000001a;--transition:all .3s cubic-bezier(.4, 0, .2, 1)}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-main);color:var(--text-main);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-family:IBM Plex Sans Arabic,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Open Sans,Helvetica Neue,sans-serif;line-height:1.6}[dir=rtl]{text-align:right}a{color:inherit;transition:var(--transition);text-decoration:none}button{cursor:pointer;font-family:inherit}input,textarea{font-family:inherit}.container{max-width:1200px;margin:0 auto;padding:0 20px}.app-layout{display:flex}.main-content{flex:1}@media (width<=768px){.app-layout{display:block}.main-content{padding-bottom:70px}.dashboard-content{margin-right:0!important;padding:20px!important}}.login-page{background:var(--bg-gradient);justify-content:center;align-items:center;min-height:100vh;padding:20px;display:flex}.login-card{background:var(--bg-card);border-radius:var(--radius-md);width:100%;max-width:420px;box-shadow:var(--shadow-lg);border:1px solid var(--border);padding:40px;animation:.6s ease-out slideUp}@keyframes slideUp{0%{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}.login-header{text-align:center;margin-bottom:32px}.login-logo{background:var(--primary);color:#fff;border-radius:16px;justify-content:center;align-items:center;width:64px;height:64px;margin:0 auto 16px;font-size:32px;display:flex;box-shadow:0 4px 12px #2563eb4d}.login-header h1{margin-bottom:8px;font-size:24px;font-weight:700}.login-header p{color:var(--text-muted);font-size:14px}.role-tabs{background:#f1f5f9;border-radius:10px;margin-bottom:24px;padding:4px;display:flex}.role-tab{text-align:center;cursor:pointer;transition:var(--transition);color:var(--text-muted);border-radius:8px;flex:1;padding:10px;font-size:14px;font-weight:600}.role-tab.active{color:var(--primary);box-shadow:var(--shadow-sm);background:#fff}.form-group{margin-bottom:20px}.form-group label{margin-bottom:8px;font-size:14px;font-weight:600;display:block}.form-group input{border:1.5px solid var(--border);border-radius:var(--radius-md);width:100%;transition:var(--transition);background:#fcfcfc;outline:none;padding:12px 16px;font-size:15px}.form-group input:focus{border-color:var(--primary);background:#fff;box-shadow:0 0 0 4px #2563eb1a}.login-options{justify-content:space-between;align-items:center;margin-bottom:24px;font-size:14px;display:flex}.remember-me{cursor:pointer;color:var(--text-muted);align-items:center;gap:8px;display:flex}.forgot-password{color:var(--primary);font-weight:600}.btn-login{background:var(--primary);color:#fff;border-radius:var(--radius-md);width:100%;transition:var(--transition);border:none;justify-content:center;align-items:center;gap:8px;padding:14px;font-size:16px;font-weight:700;display:flex}.btn-login:hover{background:var(--primary-hover);transform:translateY(-2px);box-shadow:0 6px 15px #2563eb33}.btn-login:active{transform:translateY(0)}.login-footer{text-align:center;color:var(--text-muted);margin-top:32px;font-size:14px}.login-footer a{color:var(--primary);font-weight:700}@media (width<=480px){.login-card{box-shadow:none;background:0 0;border:none;padding:24px}}.sidebar{border-left:1px solid var(--border);z-index:100;width:280px;height:100vh;transition:var(--transition);background:#fff;flex-direction:column;padding:24px;display:flex;position:fixed;top:0;right:0}.sidebar-header{margin-bottom:32px}.sidebar-logo{color:var(--primary);align-items:center;gap:12px;font-size:20px;font-weight:800;display:flex}.sidebar-user{background:var(--primary-light);border-radius:var(--radius-md);align-items:center;gap:12px;margin-bottom:32px;padding:16px;display:flex}.avatar{background:var(--primary);color:#fff;border-radius:50%;justify-content:center;align-items:center;width:40px;height:40px;font-weight:700;display:flex}.user-info{flex-direction:column;display:flex}.user-name{color:var(--text-main);font-size:14px;font-weight:700}.user-role{color:var(--primary);font-size:12px;font-weight:600}.sidebar-menu{flex:1}.menu-item{border-radius:var(--radius-sm);cursor:pointer;transition:var(--transition);color:var(--text-muted);align-items:center;gap:12px;margin-bottom:8px;padding:12px 16px;font-weight:500;display:flex}.menu-item:hover{color:var(--text-main);background:#f1f5f9}.menu-item.active{background:var(--primary);color:#fff}.menu-icon{font-size:18px}.sidebar-footer{border-top:1px solid var(--border);padding-top:24px}.logout-btn{width:100%;color:var(--danger);border-radius:var(--radius-sm);transition:var(--transition);background:0 0;border:none;align-items:center;gap:12px;padding:12px 16px;font-weight:600;display:flex}.logout-btn:hover{background:#fee2e2}@media (width<=768px){.sidebar{display:none}}.bottom-nav{border-top:1px solid var(--border);z-index:1000;background:#fff;justify-content:space-around;align-items:center;width:100%;padding:8px 0;display:none;position:fixed;bottom:0;left:0;box-shadow:0 -4px 10px #0000000d}.nav-item{color:var(--text-muted);cursor:pointer;transition:var(--transition);flex-direction:column;flex:1;align-items:center;gap:4px;display:flex}.nav-icon{font-size:20px}.nav-label{font-size:11px;font-weight:600}.nav-item.active{color:var(--primary)}@media (width<=768px){.bottom-nav{display:flex}}.dashboard-content{min-height:100vh;margin-right:280px;padding:40px}.dashboard-header{justify-content:space-between;align-items:center;margin-bottom:40px;display:flex}.welcome-text h2{margin-bottom:8px;font-size:28px}.welcome-text p{color:var(--text-muted)}.stats-row{gap:20px;display:flex}.stat-card{border-radius:var(--radius-md);box-shadow:var(--shadow-sm);background:#fff;flex-direction:column;align-items:center;min-width:140px;padding:20px 30px;display:flex}.stat-value{color:var(--primary);font-size:24px;font-weight:800}.stat-label{color:var(--text-muted);font-size:14px}.assignments-section h3{margin-bottom:24px}.assignment-list{grid-template-columns:repeat(auto-fill,minmax(350px,1fr));gap:20px;display:grid}.assignment-card{border-radius:var(--radius-md);box-shadow:var(--shadow-sm);border:1px solid var(--border);transition:var(--transition);background:#fff;justify-content:space-between;align-items:center;padding:24px;display:flex}.assignment-card:hover{box-shadow:var(--shadow-md);transform:translateY(-4px)}.card-info h4{margin-bottom:4px}.card-info p{color:var(--text-muted);margin-bottom:12px;font-size:14px}.due-date{color:var(--secondary);background:#f1f5f9;border-radius:4px;padding:4px 8px;font-size:13px}.badge{border-radius:20px;padding:4px 12px;font-size:12px;font-weight:700}.badge.warning{color:#92400e;background:#fef3c7}.badge.success{color:#065f46;background:#d1fae5}.grade-box{flex-direction:column;align-items:center;gap:4px;display:flex}.grade-value{color:var(--primary);font-size:18px;font-weight:800}.upload-modal{z-index:1000;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);background:#00000080;justify-content:center;align-items:center;width:100%;height:100%;display:flex;position:fixed;top:0;left:0}.modal-content{border-radius:var(--radius-lg);width:90%;max-width:500px;box-shadow:var(--shadow-lg);background:#fff;padding:32px}.modal-content h3{margin-bottom:24px}textarea{border:1.5px solid var(--border);border-radius:var(--radius-sm);resize:none;width:100%;height:100px;margin-bottom:16px;padding:12px}.file-dropzone{border:2px dashed var(--border);text-align:center;border-radius:var(--radius-md);cursor:pointer;color:var(--text-muted);margin-bottom:24px;padding:40px}.modal-actions{gap:12px;display:flex}.btn-primary{background:var(--primary);color:#fff;border-radius:var(--radius-sm);border:none;padding:10px 20px;font-weight:600}.btn-ghost{color:var(--text-muted);border:1px solid var(--border);border-radius:var(--radius-sm);background:0 0;padding:10px 20px;font-weight:600}@media (width<=768px){.dashboard-content{margin-right:80px;padding:20px}.dashboard-header{flex-direction:column;align-items:flex-start;gap:20px}}.submission-list{flex-direction:column;gap:16px;display:flex}.main-grid{grid-template-columns:2fr 1fr;gap:30px;display:grid}@media (width<=1024px){.main-grid{grid-template-columns:1fr}}.submission-card{border-radius:var(--radius-md);border:1px solid var(--border);transition:var(--transition);background:#fff;padding:20px}.submission-card:hover{border-color:var(--primary);box-shadow:var(--shadow-sm)}.sub-header{justify-content:space-between;margin-bottom:12px;display:flex}.student-info{flex-direction:column;display:flex}.student-info strong{font-size:16px}.student-info span{color:var(--primary);font-size:13px}.sub-date{color:var(--text-muted);font-size:12px}.sub-body p{color:var(--text-main);margin-bottom:16px;font-size:14px;line-height:1.6}.sub-footer{justify-content:flex-end;display:flex}.grade-result{align-items:center;gap:12px;display:flex}.grade-result strong{color:var(--primary);font-size:18px}.students-sidebar{border-radius:var(--radius-md);border:1px solid var(--border);background:#fff;height:fit-content;padding:24px}.student-compact-list{flex-direction:column;gap:12px;margin-top:16px;display:flex}.student-item{border-radius:var(--radius-sm);transition:var(--transition);cursor:pointer;align-items:center;gap:12px;padding:8px;display:flex}.student-item:hover{background:var(--primary-light)}.avatar-sm{background:var(--secondary);color:#fff;border-radius:50%;justify-content:center;align-items:center;width:32px;height:32px;font-size:12px;font-weight:700;display:flex}.file-attachment{color:var(--primary);background:var(--primary-light);border-radius:4px;margin-top:8px;padding:4px 12px;font-size:13px;font-weight:600;display:inline-block}.file-box{border-radius:var(--radius-sm);border:1px solid var(--border);background:#fff;justify-content:space-between;align-items:center;margin-bottom:24px;padding:12px;font-size:14px;font-weight:600;display:flex}.btn-small{background:var(--secondary);color:#fff;border:none;border-radius:4px;padding:4px 12px;font-size:12px;font-weight:600}