:root {
            --primary-color: #0077b6;
            --primary-hover: #023e8a;
            --secondary-color: #00b4d8;
            --bg-color: #f8f9fa;
            --card-bg: #ffffff;
            --text-color: #2b2d42;
            --text-muted: #6c757d;
            --border-color: #e9ecef;
            --radius: 12px;
            --shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
        }

        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            -webkit-tap-highlight-color: transparent;
        }

        body {
            background-color: var(--bg-color);
            color: var(--text-color);
            display: flex;
            align-items: center;
            justify-content: center;
            min-height: 100vh;
            padding: 20px;
        }

        .auth-container {
            background-color: var(--card-bg);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            border: 1px solid var(--border-color);
            width: 100%;
            max-width: 440px;
            overflow: hidden;
            animation: fadeIn 0.4s ease;
        }

        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(12px); }
            to { opacity: 1; transform: translateY(0); }
        }

        .auth-header {
            padding: 30px 24px 20px;
            text-align: center;
            background: linear-gradient(180deg, rgba(0, 119, 182, 0.05) 0%, rgba(255,255,255,0) 100%);
        }

        .auth-brand {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            margin-bottom: 8px;
        }

        .auth-brand i {
            font-size: 32px;
            color: var(--primary-color);
        }

        .auth-brand h1 {
            font-size: 16px;
            color: var(--primary-color);
            font-weight: 700;
        }

        .auth-header p {
            font-size: 13px;
            color: var(--text-muted);
        }

        /* Tabs Switcher */
        .auth-tabs {
            display: flex;
            border-bottom: 1px solid var(--border-color);
            background-color: #fafafa;
        }

        .auth-tab {
            flex: 1;
            padding: 14px;
            text-align: center;
            font-size: 14px;
            font-weight: 600;
            color: var(--text-muted);
            cursor: pointer;
            transition: all 0.3s ease;
            border-bottom: 2px solid transparent;
        }

        .auth-tab.active {
            color: var(--primary-color);
            border-bottom-color: var(--primary-color);
            background-color: var(--card-bg);
        }

        /* Form Controls */
        .auth-body {
            padding: 24px;
        }

        .auth-form {
            display: none;
        }

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

        .form-group {
            margin-bottom: 18px;
        }

        .form-group label {
            display: block;
            margin-bottom: 6px;
            font-weight: 600;
            font-size: 13px;
        }

        .input-group {
            position: relative;
        }

        .input-group i {
            position: absolute;
            left: 14px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-muted);
            font-size: 14px;
        }

        .form-control {
            width: 100%;
            padding: 12px 14px 12px 40px;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            font-size: 14px;
            transition: border-color 0.3s;
            background-color: #fafafa;
        }

        .form-control:focus {
            outline: none;
            border-color: var(--primary-color);
            background-color: #fff;
        }

        .form-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 12px;
        }

        .form-actions {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 20px;
            font-size: 12px;
        }

        .remember-me {
            display: flex;
            align-items: center;
            gap: 6px;
            cursor: pointer;
            color: var(--text-muted);
        }

        .forgot-pass {
            color: var(--primary-color);
            text-decoration: none;
            font-weight: 600;
        }

        .forgot-pass:hover {
            text-decoration: underline;
        }

        .btn {
            width: 100%;
            padding: 12px;
            border: none;
            border-radius: 8px;
            font-size: 14px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }

        .btn-primary {
            background-color: var(--primary-color);
            color: white;
        }

        .btn-primary:hover {
            background-color: var(--primary-hover);
        }

        .auth-footer {
            padding: 16px 24px;
            background-color: #fafafa;
            border-top: 1px solid var(--border-color);
            text-align: center;
            font-size: 12px;
            color: var(--text-muted);
        }

        /* Responsive Mobile Adjustment */
        @media (max-width: 480px) {
            .auth-container {
                box-shadow: none;
                border: none;
                background-color: transparent;
            }
            .auth-body {
                padding: 16px 0;
            }
            .auth-header {
                padding: 20px 0 15px;
                background: none;
            }
            .auth-footer {
                background: none;
                border-top: none;
            }
            .form-row {
                grid-template-columns: 1fr;
            }
        }