:root {
            --bg: #1f1d2b;
            --panel: #262334;
            --input: #2f2c42;
            --primary: #7b5cff;
            --text: #ffffff;
            --muted: #a3a1b2;
        }

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

        body {
            min-height: 100vh;
            display: flex;
            justify-content: center;
            align-items: center;
            background: radial-gradient(circle at top, #2b2750, #14121d);
            font-family: 'Inter', sans-serif;
            color: var(--text);
        }

        /* Main Card */
        .auth-card {
            width: 900px;
            max-width: 95%;
            display: grid;
            grid-template-columns: 1fr 1.1fr;
            background: var(--panel);
            border-radius: 20px;
            overflow: hidden;
            box-shadow: 0 40px 100px rgba(0,0,0,.6);
        }

        /* Left */
        .left {
            background: linear-gradient(160deg, #6b5cff, #3b2d7a);
            padding: 35px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .logo {
            font-size: 20px;
            font-weight: 700;
        }

        .quote {
            font-size: 22px;
            line-height: 1.3;
        }

        /* Right */
        .right {
            padding: 45px 50px;
        }

        /* Headings */
        h1 {
            font-size: 28px;
            margin-bottom: 6px;
        }

        .sub {
            font-size: 14px;
            color: var(--muted);
            margin-bottom: 30px;
        }

        .sub span {
            color: var(--primary);
            cursor: pointer;
            font-weight: 600;
        }

        /* Forms */
        .form {
            display: none;
        }

        .form.active {
            display: block;
        }

        /* Inputs */
        .grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 15px;
        }

        .input {
            width: 100%;
            padding: 14px;
            background: var(--input);
            border: none;
            border-radius: 10px;
            color: white;
            font-size: 14px;
            outline: none;
        }

        .input::placeholder {
            color: #8f8ca8;
        }

        .full {
            grid-column: span 2;
        }

        /* Button */
        .btn {
            margin-top: 20px;
            width: 100%;
            padding: 15px;
            border: none;
            border-radius: 12px;
            background: linear-gradient(135deg, #7b5cff, #a08bff);
            color: white;
            font-weight: 600;
            font-size: 15px;
            cursor: pointer;
            transition: .3s;
        }

        .btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 15px 40px rgba(123,92,255,.5);
        }

        /* Divider */
        .divider {
            margin: 25px 0;
            text-align: center;
            font-size: 13px;
            color: var(--muted);
        }

        /* Social Buttons */
        .social {
            display: flex;
            gap: 15px;
        }

        .social-btn {
            flex: 1;
            padding: 12px;
            background: var(--input);
            border: 1px solid #3a3652;
            border-radius: 10px;
            color: white;
            font-size: 14px;
            font-weight: 500;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            transition: .3s;
        }

        .social-btn img {
            width: 18px;
            height: 18px;
        }

        .social-btn:hover {
            background: #38345a;
            transform: translateY(-2px);
        }

        /* Error */
        .error {
            margin-top: 10px;
            font-size: 14px;
            color: #ff6b6b;
        }

        /* Responsive */
        @media(max-width: 850px) {
            .auth-card {
                grid-template-columns: 1fr;
            }
            .left {
                display: none;
            }
        }