:root {
        --primary-blue: #2563eb;
        --primary-orange: #f97316;
        --dark-blue: #1e40af;
        --light-orange: #fdba74;
        --gray-light: #f1f5f9;
        --gray-medium: #cbd5e1;
        --gray-dark: #64748b;
        --error-red: #dc2626;
        --success-green: #16a34a;
    }

    * {
        box-sizing: border-box;
    }

    body {
        font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
        line-height: 1.5;
        margin: 0;
        color: #1e293b;
    }

    .auth-container {
        display: flex;
        justify-content: center;
        align-items: flex-start;
        min-height: 100vh;
        padding: 1rem;
        background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    }

    .auth-card {
        background: white;
        border-radius: 16px;
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
        width: 100%;
        max-width: 900px;
        overflow: hidden;
        border-top: 4px solid var(--primary-orange);
    }

    .auth-header {
        padding: 1.5rem;
        text-align: center;
        background: linear-gradient(135deg, rgba(37, 99, 235, 0.05) 0%, rgba(249, 115, 22, 0.05) 100%);
    }

    .auth-logo {
        width: 60px;
        height: 60px;
        margin: 0 auto 1rem;
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .auth-logo svg {
        width: 32px;
        height: 32px;
    }

    .auth-title {
        font-size: 1.5rem;
        font-weight: 700;
        margin: 0 0 0.25rem;
        color: #1e293b;
        background: linear-gradient(90deg, var(--primary-blue) 0%, var(--primary-orange) 100%);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
    }

    .auth-subtitle {
        color: var(--gray-dark);
        font-size: 0.95rem;
        margin: 0;
    }

    .auth-form {
        padding: 1.5rem;
    }

    .form-grid {
        display: grid;
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .input-group {
        margin-bottom: 1.25rem;
        position: relative;
    }

    .input-group.full-width {
        grid-column: 1 / -1;
    }

    .input-group label {
        display: block;
        margin-bottom: 0.5rem;
        font-weight: 500;
        font-size: 0.875rem;
    }

    .input-group label:after {
        content: '*';
        color: var(--error-red);
        margin-left: 0.25rem;
        display: none;
    }

    .input-group label.required:after {
        display: inline;
    }

    .input-wrapper {
        position: relative;
    }

    .input-icon {
        position: absolute;
        left: 0.75rem;
        top: 50%;
        transform: translateY(-50%);
        color: var(--gray-dark);
    }

    .auth-form input:not([type="checkbox"]),
    .auth-form input:not([type="radio"]) {
        width: 100%;
        padding: 0.75rem 0.75rem 0.75rem 2.5rem;
        border: 1px solid var(--gray-medium);
        border-radius: 8px;
        font-size: 0.95rem;
        transition: all 0.2s ease;
    }

    .auth-form input:focus {
        border-color: var(--primary-blue);
        box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
        outline: none;
    }

    .error-message {
        color: var(--error-red);
        font-size: 0.75rem;
        margin-top: 0.25rem;
    }

    .auth-message {
        padding: 0.75rem 1rem;
        border-radius: 8px;
        margin-bottom: 1.5rem;
        font-size: 0.875rem;
    }

    .auth-message-error {
        background-color: #fee2e2;
        color: var(--error-red);
        border-left: 3px solid var(--error-red);
    }

    .auth-message-success {
        background-color: #dcfce7;
        color: var(--success-green);
        border-left: 3px solid var(--success-green);
    }

    .auth-message-info {
        background-color: #e0f2fe;
        color: var(--primary-blue);
        border-left: 3px solid var(--primary-blue);
    }

    .auth-button {
        width: 50%;
        padding: 0.875rem 1.5rem;
        background: var(--primary-blue);
        color: white;
        border: none;
        border-radius: 8px;
        font-size: 1rem;
        font-weight: 600;
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 0.5rem;
        cursor: pointer;
        transition: all 0.2s ease;
        margin-top: 1rem;
    }

    .auth-button:hover {
        background: var(--dark-blue);
        transform: translateY(-2px);
        box-shadow: 0 4px 12px rgba(37, 99, 235, 0.2);
    }

    .auth-button:active {
        transform: translateY(0);
    }

    .auth-button svg {
        transition: transform 0.2s ease;
    }

    .auth-button:hover svg {
        transform: translateX(3px);
    }

    .auth-footer {
        text-align: center;
        margin-top: 1.5rem;
        color: var(--gray-dark);
        font-size: 0.875rem;
    }

    .auth-link {
        color: var(--primary-blue);
        font-weight: 500;
        text-decoration: none;
    }

    .auth-link:hover {
        text-decoration: underline;
    }

    /* Responsive */
    @media (min-width: 640px) {
        .auth-container {
            padding: 2rem;
            align-items: center;
        }

        .form-grid {
            grid-template-columns: 1fr 1fr;
        }

        .auth-header {
            padding: 2rem;
        }

        .auth-form {
            padding: 2rem;
        }
    }

    @media (min-width: 768px) {
        .auth-title {
            font-size: 1.75rem;
        }

        .auth-subtitle {
            font-size: 1rem;
        }
    }

    /* Animations */
    @keyframes fadeIn {
        from { opacity: 0; transform: translateY(10px); }
        to { opacity: 1; transform: translateY(0); }
    }

    .auth-card {
        animation: fadeIn 0.3s ease-out forwards;
    }