.login-container {
            max-width: 500px;
            margin: 0 auto;
            padding: 2rem;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .login-header {
            text-align: center;
            margin-bottom: 3rem;
        }

        .login-header h1 {
            font-size: 2.5rem;
            font-weight: 700;
            color: #000000;
            margin-bottom: 1rem;
        }

        .login-header p {
            font-size: 1.125rem;
            color: #6b7280;
            margin-bottom: 1rem;
        }

        .form-container {
            background: var(--bg-primary, #ffffff);
            border-radius: 1rem;
            padding: 3rem;
            box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
        }

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

        .form-label {
            display: block;
            font-weight: 500;
            color: #1f2937;
            margin-bottom: 0.5rem;
            font-size: 0.875rem;
        }

        .form-input {
            width: 100%;
            padding: 0.75rem 1rem;
            border: 2px solid #e5e7eb;
            border-radius: 0.5rem;
            font-size: 1rem;
            transition: all 0.2s ease;
            background: #ffffff;
        }

        .form-input:focus {
            outline: none;
            border-color: #3b82f6;
            box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
        }

        .form-input.error {
            border-color: #ef4444;
        }

        .btn {
            padding: 0.875rem 1.5rem;
            border: none;
            border-radius: 0.5rem;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: all 0.2s ease;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            text-decoration: none;
        }

        .btn-primary {
            background: #3b82f6;
            color: white;
            width: 100%;
        }

        .btn-primary:hover {
            background: #2563eb;
            transform: translateY(-1px);
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
        }

        .btn-primary:disabled {
            background: #9ca3af;
            cursor: not-allowed;
            transform: none;
        }

        .btn-secondary {
            background: #f3f4f6;
            color: #1f2937;
            border: 1px solid #e5e7eb;
            width: 100%;
        }

        .btn-secondary:hover {
            background: #f9fafb;
        }

        .message {
            padding: 0.875rem 1rem;
            border-radius: 0.5rem;
            margin-bottom: 1.5rem;
            font-size: 0.875rem;
            font-weight: 500;
        }

        .message.error {
            background: rgba(239, 68, 68, 0.1);
            color: #ef4444;
            border: 1px solid rgba(239, 68, 68, 0.2);
        }

        .message.success {
            background: rgba(16, 185, 129, 0.1);
            color: #10b981;
            border: 1px solid rgba(16, 185, 129, 0.2);
        }

        .message.warning {
            background: rgba(249, 115, 22, 0.1);
            color: #f97316;
            border: 1px solid rgba(249, 115, 22, 0.2);
        }

        .field-error {
            color: #ef4444;
            font-size: 0.75rem;
            margin-top: 0.25rem;
            display: none;
        }

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

        .loading-spinner {
            display: inline-block;
            width: 16px;
            height: 16px;
            border: 2px solid transparent;
            border-radius: 50%;
            border-top-color: currentColor;
            animation: spin 0.8s ease-in-out infinite;
        }

        @keyframes spin {
            to { transform: rotate(360deg); }
        }

        .nav-link {
            position: fixed;
            top: 20px;
            right: 20px;
            display: inline-flex;
            align-items: center;
            color: #3b82f6;
            text-decoration: none;
            font-weight: 500;
            padding: 0.75rem 1.5rem;
            transition: all 0.2s ease;
            background: rgba(255, 255, 255, 0.9);
            border-radius: 8px;
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
            z-index: 1000;
        }

        .nav-link:hover {
            color: #2563eb;
            box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
            transform: translateY(-2px);
        }

        .trial-notice {
            background: rgba(59, 130, 246, 0.1);
            border: 1px solid rgba(59, 130, 246, 0.2);
            padding: 1rem;
            border-radius: 0.5rem;
            margin-top: 1rem;
            text-align: center;
            font-size: 0.875rem;
            color: #1f2937;
        }

        .trial-notice a {
            color: #3b82f6;
            font-weight: 600;
            text-decoration: none;
        }

        .trial-notice a:hover {
            text-decoration: underline;
        }