* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', sans-serif;
            background: #f5f7fa;
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 16px;
        }

        .auth-container {
            background: white;
            border-radius: 8px;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
            border: 1px solid #e2e8f0;
            max-width: 450px;
            width: 100%;
            padding: 32px 24px;
        }

        .auth-header {
            text-align: center;
            margin-bottom: 32px;
        }

        .auth-logo {
            max-width: 300px;
            height: auto;
            margin: 0 auto 16px;
            display: block;
        }

        .auth-header p {
            font-size: 14px;
            color: #718096;
            line-height: 1.4;
        }

        .auth-tabs {
            display: flex;
            gap: 8px;
            margin-bottom: 24px;
            background: #f7fafc;
            padding: 4px;
            border-radius: 8px;
        }

        .auth-tab {
            flex: 1;
            padding: 10px;
            background: transparent;
            border: none;
            border-radius: 6px;
            font-size: 14px;
            font-weight: 600;
            color: #718096;
            cursor: pointer;
            transition: all 0.2s ease;
        }

        .auth-tab.active {
            background: white;
            color: #2563eb;
            box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
        }

        .auth-form {
            display: none;
        }

        .auth-form.active {
            display: block;
        }

        .form-group {
            margin-bottom: 16px;
        }

        .form-label {
            display: block;
            font-size: 13px;
            font-weight: 600;
            color: #2d3748;
            margin-bottom: 6px;
        }

        .form-input {
            width: 100%;
            padding: 12px 16px;
            font-size: 14px;
            border: 2px solid #e2e8f0;
            border-radius: 8px;
            transition: all 0.2s ease;
            font-family: inherit;
            background: white;
            color: #2d3748;
        }

        .form-input:focus {
            outline: none;
            border-color: #2563eb;
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
        }

        .form-input::placeholder {
            color: #a0aec0;
        }

        .btn {
            width: 100%;
            padding: 14px;
            font-size: 15px;
            font-weight: 600;
            color: white;
            background: #2563eb;
            border: none;
            border-radius: 6px;
            cursor: pointer;
            transition: all 0.2s ease;
            margin-top: 8px;
        }

        .btn:hover:not(:disabled) {
            background: #1d4ed8;
            box-shadow: 0 2px 6px rgba(37, 99, 235, 0.2);
        }

        .btn:disabled {
            background: #cbd5e0;
            cursor: not-allowed;
        }

        .error-message {
            background: #fed7d7;
            color: #c53030;
            padding: 12px 16px;
            border-radius: 8px;
            font-size: 13px;
            margin-bottom: 16px;
            display: none;
        }

        .error-message.show {
            display: block;
        }

        .success-message {
            background: #c6f6d5;
            color: #22543d;
            padding: 12px 16px;
            border-radius: 8px;
            font-size: 13px;
            margin-bottom: 16px;
            display: none;
        }

        .success-message.show {
            display: block;
        }

        .divider {
            display: flex;
            align-items: center;
            margin: 24px 0;
            color: #a0aec0;
            font-size: 13px;
        }

        .divider::before,
        .divider::after {
            content: '';
            flex: 1;
            height: 1px;
            background: #e2e8f0;
        }

        .divider::before {
            margin-right: 12px;
        }

        .divider::after {
            margin-left: 12px;
        }

        .forgot-password {
            text-align: center;
            margin-top: 16px;
        }

        .forgot-password a {
            color: #2563eb;
            text-decoration: none;
            font-size: 13px;
            font-weight: 500;
        }

        .forgot-password a:hover {
            text-decoration: underline;
        }

        .loading {
            display: none;
            text-align: center;
            margin-top: 16px;
            color: #718096;
            font-size: 13px;
        }

        .loading.show {
            display: block;
        }

        .password-requirements {
            font-size: 12px;
            color: #718096;
            margin-top: 8px;
            line-height: 1.5;
        }

        @media (max-width: 480px) {
            .auth-container {
                padding: 24px 20px;
            }

            .auth-logo {
                max-width: 250px;
            }

            .auth-header p {
                font-size: 13px;
            }

            .form-input {
                padding: 14px;
                font-size: 16px; /* Prevents zoom on iOS */
            }

            .btn {
                padding: 16px;
                font-size: 16px;
            }

            .auth-tab {
                padding: 12px;
                font-size: 13px;
            }
        }