.login-page {
        font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
        max-width: 28rem;
        margin: 0 auto;
        padding: 1rem;
    }

    .login-card {
        background: #1e293b;
        border-radius: 1.5rem;
        padding: 2rem 1.5rem;
        box-shadow: 0 4px 20px rgba(0,0,0,0.3);
        border: 1px solid #334155;
        position: relative;
        overflow: hidden;
    }

    .login-card::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        height: 4px;
        background: linear-gradient(90deg, #14b8a6, #2dd4bf, #5eead4);
    }

    .login-header {
        text-align: center;
        margin-bottom: 2rem;
    }

    .login-icon {
        font-size: 4rem;
        display: block;
        margin-bottom: 1rem;
        animation: bounce 2s ease-in-out infinite;
    }

    @@keyframes bounce {
        0%, 100% { transform: translateY(0); }
        50% { transform: translateY(-10px); }
    }

    .login-title {
        font-size: 1.75rem;
        font-weight: 800;
        background: linear-gradient(135deg, #14b8a6, #2dd4bf);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
        margin-bottom: 0.5rem;
    }

    .login-subtitle {
        color: #94a3b8;
        font-size: 0.9375rem;
    }

    .error-message {
        background: linear-gradient(135deg, #7f1d1d, #991b1b);
        color: #fca5a5;
        padding: 1rem;
        border-radius: 1rem;
        margin-bottom: 1.5rem;
        font-size: 0.875rem;
        border: 1px solid #dc2626;
        text-align: center;
        animation: shake 0.5s ease-in-out;
    }

    @@keyframes shake {
        0%, 100% { transform: translateX(0); }
        25% { transform: translateX(-5px); }
        75% { transform: translateX(5px); }
    }

    .form-group {
        margin-bottom: 1.5rem;
    }

    .form-label {
        display: block;
        font-size: 0.6875rem;
        font-weight: 700;
        color: #14b8a6;
        text-transform: uppercase;
        letter-spacing: 0.1em;
        margin-bottom: 0.75rem;
        text-align: center;
    }

    .code-input {
        width: 100%;
        padding: 1.25rem;
        border: 3px solid #14b8a6;
        border-radius: 1rem;
        text-align: center;
        font-size: 2rem;
        font-weight: 800;
        font-family: ui-monospace, monospace;
        letter-spacing: 0.3rem;
        text-transform: uppercase;
        background: linear-gradient(135deg, #134e4a, #0f766e);
        color: #2dd4bf;
        transition: all 0.2s;
    }

    .code-input:focus {
        outline: none;
        border-color: #2dd4bf;
        box-shadow: 0 0 0 4px rgba(20, 184, 166, 0.2);
    }

    .code-input::placeholder {
        color: #0d9488;
        letter-spacing: 0.2rem;
    }

    .btn-login {
        width: 100%;
        padding: 1rem;
        background: linear-gradient(135deg, #0d9488, #14b8a6);
        color: white;
        font-weight: 700;
        font-size: 1.125rem;
        border: none;
        border-radius: 1rem;
        cursor: pointer;
        transition: all 0.2s;
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 0.5rem;
        box-shadow: 0 4px 14px rgba(13, 148, 136, 0.4);
        margin-top: 0.5rem;
    }

    .btn-login:hover {
        transform: translateY(-2px);
        box-shadow: 0 6px 20px rgba(13, 148, 136, 0.5);
    }

    .btn-login:active {
        transform: translateY(0);
    }

    .help-text {
        text-align: center;
        margin-top: 1.5rem;
        padding-top: 1.5rem;
        border-top: 2px dashed #334155;
        font-size: 0.875rem;
        color: #64748b;
    }

    .parent-link {
        text-align: center;
        margin-top: 1rem;
        font-size: 0.9375rem;
        color: #94a3b8;
    }

    .parent-link a {
        color: #14b8a6;
        font-weight: 600;
        text-decoration: none;
        transition: color 0.2s;
    }

    .parent-link a:hover {
        color: #2dd4bf;
    }

    .decorative-stars {
        position: absolute;
        top: 1rem;
        right: 1rem;
        font-size: 1.5rem;
        opacity: 0.6;
        animation: twinkle 2s ease-in-out infinite;
    }

    @@keyframes twinkle {
        0%, 100% { opacity: 0.3; transform: scale(1); }
        50% { opacity: 0.8; transform: scale(1.1); }
    }