body {
            margin: 0;
            min-height: 100vh;
            display: flex;
            background: var(--color-warm-bg);
            font-family: var(--font-body-land);
        }
        .auth-split {
            display: grid;
            grid-template-columns: 1fr 1fr;
            min-height: 100vh;
            width: 100%;
        }
        .auth-brand {
            background: linear-gradient(160deg, #1c2026 0%, #2c3a47 60%, #1c2026 100%);
            color: #fff;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            padding: 3rem;
            position: relative;
            overflow: hidden;
        }
        .auth-brand::before {
            content: '';
            position: absolute;
            top: -100px; right: -100px;
            width: 400px; height: 400px;
            background: radial-gradient(circle, rgba(224,92,26,.25) 0%, transparent 65%);
            pointer-events: none;
        }
        .auth-brand__logo {
            font-size: 1.3rem;
            font-weight: 800;
            color: #fff;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: .5rem;
            position: relative;
            z-index: 1;
        }
        .auth-brand__logo-img {
            width: 2.2rem;
            height: 2.2rem;
            object-fit: contain;
            border-radius: .8rem;
            background: rgba(255,255,255,.08);
            padding: .08rem;
            flex-shrink: 0;
        }
        .auth-brand__logo strong { color: var(--color-accent); }
        .auth-brand__content { position: relative; z-index: 1; }
        .auth-brand__tagline {
            font-family: var(--font-display);
            font-size: clamp(1.5rem, 3vw, 2rem);
            font-weight: 900;
            line-height: 1.2;
            margin-bottom: 1.5rem;
            color: #fff;
        }
        .auth-brand__tagline span { color: var(--color-orange-lt); }
        .auth-brand__desc {
            color: rgba(255,255,255,.65);
            font-size: .9rem;
            line-height: 1.7;
            margin-bottom: 2rem;
        }

        /* Steps come funziona */
        .register-steps { list-style: none; }
        .register-steps li {
            display: flex;
            align-items: flex-start;
            gap: 1rem;
            padding: .85rem 0;
            border-bottom: 1px solid rgba(255,255,255,.07);
        }
        .register-steps li:last-child { border-bottom: none; }
        .register-step-num {
            width: 28px; height: 28px;
            background: var(--color-orange);
            color: #fff;
            border-radius: 50%;
            font-size: .8rem;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }
        .register-steps strong { display: block; color: #fff; font-size: .9rem; }
        .register-steps span   { color: rgba(255,255,255,.6); font-size: .8rem; }

        .auth-brand__proof {
            display: flex;
            align-items: center;
            gap: .75rem;
            background: rgba(255,255,255,.07);
            border-radius: var(--radius-md);
            padding: 1rem 1.25rem;
            position: relative;
            z-index: 1;
        }
        .auth-brand__proof cite { font-style: normal; font-size: .85rem; color: rgba(255,255,255,.75); }
        .auth-brand__proof strong { color: #fff; display: block; }
        .proof-avatar { font-size: 2rem; }

        .auth-form-panel {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            padding: 3rem 2rem;
            background: #fff;
            overflow-y: auto;
        }
        .auth-form-card { width: 100%; max-width: 440px; }
        .auth-form-card__title {
            font-family: var(--font-display);
            font-size: 1.8rem;
            font-weight: 900;
            color: var(--color-chalk);
            margin-bottom: .5rem;
        }
        .auth-form-card__subtitle { color: var(--color-text-muted); font-size: .95rem; margin-bottom: 2rem; }
        .auth-back {
            display: inline-flex;
            align-items: center;
            gap: .4rem;
            color: var(--color-text-muted);
            font-size: .85rem;
            text-decoration: none;
            margin-bottom: 2rem;
            transition: color .2s;
        }
        .auth-back:hover { color: var(--color-chalk); }

        /* Piano banner */
        .plan-selection-banner {
            display: none;
            background: linear-gradient(135deg, #fff5f0, #ffe8d8);
            border: 2px solid var(--color-orange);
            border-radius: var(--radius-md);
            padding: .85rem 1rem;
            margin-bottom: 1.5rem;
            font-size: .9rem;
            align-items: center;
            gap: .75rem;
        }
        .plan-selection-banner.show { display: flex; }
        .plan-selection-banner strong { color: var(--color-orange); }
        .register-plan-note {
            background: linear-gradient(180deg, #fffaf6 0%, #fff 100%);
            border: 1px solid rgba(224, 92, 26, 0.18);
            border-left: 4px solid var(--color-orange);
            border-radius: var(--radius-md);
            padding: .95rem 1rem;
            margin-bottom: 1.5rem;
            box-shadow: 0 18px 40px rgba(28, 32, 38, 0.05);
        }
        .register-plan-note strong {
            display: block;
            color: var(--color-chalk);
            font-size: .95rem;
            margin-bottom: .35rem;
        }
        .register-plan-note p {
            margin: 0;
            color: var(--color-text-muted);
            font-size: .88rem;
            line-height: 1.65;
        }

        /* Password strength */
        .password-strength-bar {
            display: flex;
            gap: 4px;
            margin-top: .5rem;
        }
        .psb-segment {
            flex: 1;
            height: 3px;
            background: var(--color-border);
            border-radius: 2px;
            transition: background .3s;
        }
        .psb-segment.active-weak   { background: var(--color-error); }
        .psb-segment.active-medium { background: var(--color-warning); }
        .psb-segment.active-strong { background: var(--color-success); }
        .password-strength-label {
            font-size: .75rem;
            margin-top: .25rem;
            color: var(--color-text-muted);
        }
        .register-terms {
            text-align: center;
            margin-top: 1rem;
            font-size: .8rem;
            color: var(--color-text-muted);
        }
        .register-acceptance {
            margin: 1rem 0 1.25rem;
        }
        .register-checkbox {
            display: flex;
            align-items: flex-start;
            gap: .75rem;
            font-size: .86rem;
            line-height: 1.6;
            color: var(--color-text-muted);
        }
        .register-checkbox input {
            margin-top: .2rem;
            width: 18px;
            height: 18px;
            accent-color: var(--color-orange);
            flex-shrink: 0;
        }
        .register-checkbox a {
            color: var(--color-orange);
            font-weight: 700;
            text-decoration: none;
        }
        .register-checkbox a:hover {
            text-decoration: underline;
        }
        .register-divider {
            margin: 1.5rem 0;
            border: none;
            border-top: 1px solid var(--color-border);
        }
        .register-login-copy {
            text-align: center;
            font-size: .9rem;
            color: var(--color-text-muted);
        }
        .register-login-link {
            font-weight: 700;
        }

        @media (max-width: 768px) {
            .auth-split { grid-template-columns: 1fr; }
            .auth-brand  { display: none; }
            .auth-form-panel { padding: 2rem 1.5rem; }
        }