:root {
        --card: #ffffff;
        --primary: #4f46e5;
        --accent: #10b981;
    }
    
    body {
        font-family: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Arial;
        background: linear-gradient(180deg, #f8fafc, #ffffff);
    }
    
    .card {
        background: var(--card);
        border-radius: 14px;
        box-shadow: 0 10px 30px rgba(2, 6, 23, 0.06);
    }
    
    .input {
        padding: 10px;
        border-radius: 10px;
        border: 1px solid #e6edf3
    }
    
    .btn {
        padding: 8px 12px;
        border-radius: 10px;
        font-weight: 600;
        cursor: pointer
    }
    
    .btn-primary {
        background: var(--primary);
        color: white
    }
    
    .btn-accent {
        background: var(--accent);
        color: white
    }
    
    .small-muted {
        color: #64748b;
        font-size: 13px
    }
    
    .avatar {
        width: 64px;
        height: 64px;
        border-radius: 12px;
        display: flex;
        align-items: center;
        justify-content: center;
        background: linear-gradient(135deg, var(--accent), var(--primary));
        color: white;
        font-weight: 700
    }
    
    .cal-cell {
        min-height: 64px;
        border-radius: 8px;
        padding: 8px;
        background: white;
        transition: transform .12s ease
    }
    
    .cal-cell:hover {
        transform: translateY(-4px)
    }
    /* Steps */
    
    .step {
        display: none
    }
    
    .step.active {
        display: block;
        animation: fadeIn .24s ease
    }
    
    @keyframes fadeIn {
        from {
            opacity: 0;
            transform: translateY(6px)
        }
        to {
            opacity: 1;
            transform: translateY(0)
        }
    }
    /* Login centering improvements */
    
    .login-wrap {
        display: flex;
        justify-content: center
    }
    
    .login-card {
        max-width: 740px;
        width: 100%
    }
    
    .error {
        color: #b91c1c
    }
    
    .ok {
        color: #065f46
    }
    
    .linkish {
        color: #1d4ed8;
        text-decoration: underline;
        cursor: pointer
    }
    
    @media (max-width:860px) {
        .lg-hide {
            display: none
        }
    }
    /* Toggle switch */
    
    .toggle-container {
        display: flex;
        align-items: center;
        gap: 8px;
        margin-bottom: 12px;
    }
    
    .toggle-label {
        font-size: 14px;
        font-weight: 500;
    }
    
    .toggle-switch {
        position: relative;
        display: inline-block;
        width: 50px;
        height: 24px;
    }
    
    .toggle-switch input {
        opacity: 0;
        width: 0;
        height: 0;
    }
    
    .toggle-slider {
        position: absolute;
        cursor: pointer;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background-color: #ccc;
        transition: .4s;
        border-radius: 24px;
    }
    
    .toggle-slider:before {
        position: absolute;
        content: "";
        height: 16px;
        width: 16px;
        left: 4px;
        bottom: 4px;
        background-color: white;
        transition: .4s;
        border-radius: 50%;
    }
    
    input:checked+.toggle-slider {
        background-color: var(--primary);
    }
    
    input:checked+.toggle-slider:before {
        transform: translateX(26px);
    }
    /* View containers */
    
    .view-container {
        display: none;
    }
    
    .view-container.active {
        display: block;
    }
    
         :root {
            --primary: #4361ee;
            --secondary: #3a0ca3;
            --accent: #f72585;
            --light: #f8f9fa;
            --dark: #212529;
            --success: #4cc9f0;
            --warning: #ffba08;
            --danger: #f94144;
            --gray: #adb5bd;
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
            background-color: #f9fafb;
            color: #1f2937;
            line-height: 1.6;
        }
        /* Geometric background elements */
        
        .geometric-bg {
            position: relative;
            overflow: hidden;
        }
        
        .geometric-bg::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(120deg, rgba(99, 102, 241, 0.1) 0%, transparent 70%), radial-gradient(circle at 90% 5%, rgba(236, 72, 153, 0.1) 0%, transparent 50%), repeating-linear-gradient(45deg, rgba(79, 70, 229, 0.05) 0px, rgba(79, 70, 229, 0.05) 1px, transparent 1px, transparent 11px);
            z-index: 0;
        }
        
        .shape-1 {
            position: absolute;
            top: -50px;
            right: -50px;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(67, 97, 238, 0.15) 0%, rgba(67, 97, 238, 0) 70%);
            z-index: 0;
        }
        
        .shape-2 {
            position: absolute;
            bottom: -80px;
            left: -80px;
            width: 300px;
            height: 300px;
            background: linear-gradient(135deg, rgba(247, 37, 133, 0.1) 0%, rgba(247, 37, 133, 0) 70%);
            border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
            z-index: 0;
        }
        
        .shape-3 {
            position: absolute;
            top: 50%;
            left: 70%;
            width: 150px;
            height: 150px;
            background: linear-gradient(45deg, rgba(76, 201, 240, 0.1) 0%, rgba(76, 201, 240, 0) 70%);
            clip-path: polygon(50% 0%, 100% 50%, 50% 100%, 0% 50%);
            z-index: 0;
        }
        /* Card styling */
        
        .card {
            background: white;
            border-radius: 16px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
            overflow: hidden;
            position: relative;
            z-index: 1;
        }
        /* Button styling */
        
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0.6rem 1.2rem;
            border-radius: 10px;
            font-weight: 600;
            font-size: 0.9rem;
            cursor: pointer;
            transition: all 0.2s ease;
            border: none;
            background: #e5e7eb;
            color: #4b5563;
        }
        
        .btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        }
        
        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: white;
        }
        
        .btn-accent {
            background: var(--accent);
            color: white;
        }
        /* Input styling */
        
        .input {
            padding: 0.6rem 1rem;
            border-radius: 10px;
            border: 1px solid #e5e7eb;
            font-size: 0.9rem;
            transition: all 0.2s ease;
        }
        
        .input:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.2);
        }
        /* Text styles */
        
        .small-muted {
            font-size: 0.875rem;
            color: #6b7280;
        }
        /* Step management */
        
        .step {
            display: none;
        }
        
        .step.active {
            display: block;
        }
        /* Avatar */
        
        .avatar {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-weight: bold;
            font-size: 1.2rem;
        }
        /* Login form */
        
        .login-wrap {
            max-width: 500px;
            margin: 0 auto;
        }
        
        .login-card {
            background: white;
            border-radius: 16px;
            box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
        }
        
        .role-tab {
            padding: 0.5rem 1rem;
            border-radius: 8px;
            font-size: 0.9rem;
            background: #f3f4f6;
        }
        
        .role-tab.active {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: white;
        }
        /* Link style */
        
        .linkish {
            color: var(--primary);
            text-decoration: underline;
            cursor: pointer;
        }
        /* Toggle switch */
        
        .toggle-container {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        
        .toggle-label {
            font-size: 0.875rem;
            color: #6b7280;
        }
        
        .toggle-switch {
            position: relative;
            display: inline-block;
            width: 50px;
            height: 24px;
        }
        
        .toggle-switch input {
            opacity: 0;
            width: 0;
            height: 0;
        }
        
        .toggle-slider {
            position: absolute;
            cursor: pointer;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-color: #ccc;
            transition: .4s;
            border-radius: 24px;
        }
        
        .toggle-slider:before {
            position: absolute;
            content: "";
            height: 16px;
            width: 16px;
            left: 4px;
            bottom: 4px;
            background-color: white;
            transition: .4s;
            border-radius: 50%;
        }
        
        input:checked+.toggle-slider {
            background-color: var(--primary);
        }
        
        input:checked+.toggle-slider:before {
            transform: translateX(26px);
        }
        /* View containers */
        
        .view-container {
            display: none;
        }
        
        .view-container.active {
            display: block;
        }
        /* Calendar */
        
        .cal-head {
            font-size: 0.75rem;
            text-align: center;
            color: #6b7280;
        }
        /* Landing page specific styles */
        
        .landing-hero {
            position: relative;
            z-index: 2;
        }
        
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 1.5rem;
            margin-top: 2rem;
        }
        
        .feature-item {
            background: rgba(255, 255, 255, 0.8);
            backdrop-filter: blur(10px);
            padding: 1.5rem;
            border-radius: 12px;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
            transition: transform 0.3s ease;
        }
        
        .feature-item:hover {
            transform: translateY(-5px);
        }
        
        .demo-accounts {
            background: rgba(255, 255, 255, 0.9);
            border-radius: 12px;
            padding: 1.5rem;
            margin-top: 2rem;
        }
        /* Pulse animation for CTA */
        
        @keyframes pulse {
            0% {
                transform: scale(1);
            }
            50% {
                transform: scale(1.05);
            }
            100% {
                transform: scale(1);
            }
        }
        
        .pulse {
            animation: pulse 2s infinite;
        }
        
        .sort-container {
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 12px;
        }
        
        .sort-select {
            padding: 6px 10px;
            border-radius: 6px;
            border: 1px solid #e5e7eb;
            font-size: 0.875rem;
        }
        
        .class-tabs {
            display: flex;
            gap: 8px;
            margin-bottom: 12px;
            flex-wrap: wrap;
        }
        
        .class-tab {
            padding: 6px 12px;
            border-radius: 6px;
            background: #f3f4f6;
            cursor: pointer;
            font-size: 0.875rem;
        }
        
        .class-tab.active {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: white;
        }
        
        .parent-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 1rem;
        }