:root {
            --bg-primary: #0a0e17;
            --bg-card: rgba(20, 27, 45, 0.85);
            --border: rgba(255, 255, 255, 0.08);
            --text: #e2e8f0;
            --text-muted: #64748b;
            --accent: #3b82f6;
            --accent-hover: #2563eb;
            --success: #22c55e;
            --error: #ef4444;
            --google-blue: #4285f4;
            --google-blue-hover: #3367d6;
        }

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

        body {
            font-family: 'Inter', system-ui, sans-serif;
            background: var(--bg-primary);
            color: var(--text);
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            overflow: hidden;
        }

        /* Animated background gradient */
        body::before {
            content: '';
            position: fixed;
            top: -50%; left: -50%;
            width: 200%; height: 200%;
            background: radial-gradient(ellipse at 30% 20%, rgba(59, 130, 246, 0.08) 0%, transparent 50%),
                        radial-gradient(ellipse at 70% 80%, rgba(139, 92, 246, 0.06) 0%, transparent 50%);
            animation: bgShift 20s ease-in-out infinite;
            z-index: 0;
        }

        @keyframes bgShift {
            0%, 100% { transform: translate(0, 0) rotate(0deg); }
            33% { transform: translate(-2%, 1%) rotate(1deg); }
            66% { transform: translate(1%, -1%) rotate(-0.5deg); }
        }

        .login-container {
            position: relative;
            z-index: 1;
            width: 100%;
            max-width: 420px;
            padding: 0 20px;
        }

        .login-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: 16px;
            padding: 40px 32px;
            backdrop-filter: blur(20px);
            box-shadow: 0 25px 50px rgba(0, 0, 0, 0.4);
        }

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

        .login-header h1 {
            font-size: 24px;
            font-weight: 700;
            letter-spacing: -0.02em;
            margin-bottom: 8px;
        }

        .login-header p {
            color: var(--text-muted);
            font-size: 14px;
        }

        /* Error message */
        .error-msg {
            background: rgba(239, 68, 68, 0.1);
            border: 1px solid rgba(239, 68, 68, 0.3);
            color: var(--error);
            padding: 12px 16px;
            border-radius: 8px;
            font-size: 13px;
            margin-bottom: 20px;
            text-align: center;
        }

        /* Google Button */
        .btn-google {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 12px;
            width: 100%;
            padding: 14px 20px;
            background: var(--google-blue);
            color: #fff;
            border: none;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 600;
            font-family: inherit;
            cursor: pointer;
            transition: all 0.2s ease;
            text-decoration: none;
        }

        .btn-google:hover {
            background: var(--google-blue-hover);
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba(66, 133, 244, 0.4);
        }

        .btn-google svg {
            width: 20px;
            height: 20px;
        }

        /* Divider */
        .divider {
            display: flex;
            align-items: center;
            margin: 24px 0;
            gap: 12px;
        }

        .divider::before,
        .divider::after {
            content: '';
            flex: 1;
            height: 1px;
            background: var(--border);
        }

        .divider span {
            color: var(--text-muted);
            font-size: 12px;
            text-transform: uppercase;
            letter-spacing: 0.05em;
        }

        /* Basic Auth Form */
        .auth-form { display: none; }
        .auth-form.visible { display: block; }

        .toggle-form {
            display: block;
            width: 100%;
            padding: 10px;
            background: transparent;
            border: 1px solid var(--border);
            border-radius: 8px;
            color: var(--text-muted);
            font-size: 13px;
            font-family: inherit;
            cursor: pointer;
            transition: all 0.2s ease;
            text-align: center;
        }

        .toggle-form:hover {
            border-color: var(--accent);
            color: var(--text);
        }

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

        .form-group label {
            display: block;
            font-size: 13px;
            font-weight: 500;
            color: var(--text-muted);
            margin-bottom: 6px;
        }

        .form-group input {
            width: 100%;
            padding: 12px 14px;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border);
            border-radius: 8px;
            color: var(--text);
            font-size: 14px;
            font-family: inherit;
            outline: none;
            transition: border-color 0.2s ease;
        }

        .form-group input:focus {
            border-color: var(--accent);
        }

        .btn-submit {
            width: 100%;
            padding: 12px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid var(--border);
            border-radius: 8px;
            color: var(--text);
            font-size: 14px;
            font-weight: 600;
            font-family: inherit;
            cursor: pointer;
            transition: all 0.2s ease;
            margin-top: 4px;
        }

        .btn-submit:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: var(--accent);
        }

        .form-error {
            color: var(--error);
            font-size: 13px;
            margin-top: 8px;
            text-align: center;
            display: none;
        }