body {
            display: flex;
            align-items: center;
            justify-content: center;
            min-height: 100vh;
        }

        .auth-wrapper {
            width: 100%;
            max-width: 440px;
            padding: 0 20px;
            animation: fadeIn 0.5s ease;
        }

        .auth-card {
            background: linear-gradient(145deg, var(--background-light), var(--background-surface));
            border-radius: 20px;
            padding: 40px 36px;
            border: 1px solid var(--border-color);
            box-shadow:
                0 12px 40px rgba(0, 0, 0, 0.5),
                0 0 60px rgba(0, 226, 223, 0.06);
            position: relative;
            overflow: hidden;
        }

        .auth-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: var(--gradient);
            border-radius: 20px 20px 0 0;
        }

        .auth-logo {
            text-align: center;
            margin-bottom: 28px;
        }

        .auth-logo span {
            font-size: 26px;
            font-weight: 700;
            color: var(--primary-color);
            text-shadow: 0 0 12px rgba(0, 226, 223, 0.3);
        }

        .auth-title {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--text-color);
            text-align: center;
            margin-bottom: 6px;
        }

        .auth-subtitle {
            text-align: center;
            color: var(--text-color-dark);
            font-size: 0.9rem;
            margin-bottom: 28px;
        }

        .auth-subtitle a {
            color: var(--primary-color);
            text-decoration: none;
            font-weight: 600;
            transition: color 0.2s;
        }

        .auth-subtitle a:hover {
            color: #5ff5f2;
        }

        .auth-form {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .auth-form .input {
            padding: 14px 16px;
            font-size: 15px;
            border-radius: 10px;
            background: var(--background-dark);
        }

        .auth-form .btn-primary {
            padding: 14px;
            font-size: 16px;
            border-radius: 10px;
            margin-top: 4px;
            letter-spacing: 0.3px;
        }

        .auth-hint {
            display: flex;
            align-items: flex-start;
            gap: 8px;
            padding: 12px 14px;
            background: rgba(0, 226, 223, 0.06);
            border: 1px solid rgba(0, 226, 223, 0.12);
            border-radius: 10px;
            margin-bottom: 4px;
            font-size: 0.82rem;
            color: var(--text-color-dark);
            line-height: 1.5;
        }

        .auth-hint i {
            font-size: 18px;
            color: var(--primary-color);
            flex-shrink: 0;
            margin-top: 1px;
        }

        .auth-divider {
            display: flex;
            align-items: center;
            gap: 12px;
            margin: 20px 0 0;
            color: var(--text-color-dark);
            font-size: 0.85rem;
        }

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