:root {
            --ink: #102027;
            --muted: #667085;
            --line: #d9e2e7;
            --surface: #ffffff;
            --soft: #f4f8f9;
            --primary: #0f766e;
            --primary-dark: #115e59;
            --accent: #2563eb;
            --danger: #c2410c;
            --success: #047857;
            --shadow: 0 20px 60px rgba(16, 32, 39, 0.12);
        }
        * { box-sizing: border-box; }
        html { min-height: 100%; background: #eef5f5; }
        body {
            min-height: 100vh;
            margin: 0;
            font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
            color: var(--ink);
            background:
                linear-gradient(120deg, rgba(15, 118, 110, 0.12), rgba(37, 99, 235, 0.08)),
                #eef5f5;
            padding: max(18px, env(safe-area-inset-top)) max(18px, env(safe-area-inset-right)) max(18px, env(safe-area-inset-bottom)) max(18px, env(safe-area-inset-left));
        }
        .auth-shell {
            width: min(1120px, 100%);
            min-height: calc(100vh - 36px);
            margin: 0 auto;
            display: grid;
            grid-template-columns: minmax(0, 1fr) 460px;
            align-items: center;
            gap: 28px;
        }
        .product-panel {
            padding: clamp(24px, 5vw, 56px);
        }
        .brand-mark {
            width: 54px;
            height: 54px;
            border-radius: 8px;
            display: grid;
            place-items: center;
            background: #0f766e;
            color: white;
            font-weight: 750;
            font-size: 1.35rem;
            box-shadow: 0 14px 30px rgba(15, 118, 110, 0.24);
            margin-bottom: 26px;
        }
        h1 {
            max-width: 720px;
            margin: 0;
            font-size: clamp(2rem, 5vw, 4.5rem);
            line-height: 1;
            letter-spacing: 0;
        }
        .lead {
            max-width: 620px;
            margin: 20px 0 0;
            color: var(--muted);
            font-size: clamp(1rem, 1.8vw, 1.2rem);
        }
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, minmax(0, 1fr));
            gap: 12px;
            margin-top: 34px;
            max-width: 720px;
        }
        .feature {
            min-height: 104px;
            padding: 16px;
            border: 1px solid rgba(15, 118, 110, 0.18);
            border-radius: 8px;
            background: rgba(255, 255, 255, 0.64);
        }
        .feature strong {
            display: block;
            font-size: 0.95rem;
            margin-bottom: 7px;
        }
        .feature span {
            color: var(--muted);
            font-size: 0.86rem;
        }
        .auth-card {
            background: var(--surface);
            border: 1px solid rgba(16, 32, 39, 0.08);
            border-radius: 8px;
            padding: clamp(20px, 4vw, 34px);
            box-shadow: var(--shadow);
        }
        .auth-card h2 {
            font-size: 1.15rem;
            margin: 0 0 18px;
        }
        .form-group { margin-bottom: 14px; }
        label {
            display: block;
            margin-bottom: 7px;
            color: #344054;
            font-size: 0.9rem;
            font-weight: 650;
        }
        input, button {
            width: 100%;
            min-height: 46px;
            padding: 11px 13px;
            border-radius: 8px;
            font: inherit;
        }
        input {
            border: 1px solid var(--line);
            background: #fbfcfd;
            color: var(--ink);
            outline: none;
            transition: border-color .18s ease, box-shadow .18s ease, background .18s ease;
        }
        input:focus {
            border-color: var(--primary);
            background: white;
            box-shadow: 0 0 0 4px rgba(15, 118, 110, 0.13);
        }
        button {
            border: 0;
            background: var(--primary);
            color: white;
            font-weight: 750;
            cursor: pointer;
            transition: transform .18s ease, background .18s ease, box-shadow .18s ease;
        }
        button:hover {
            background: var(--primary-dark);
            box-shadow: 0 12px 24px rgba(15, 118, 110, 0.2);
            transform: translateY(-1px);
        }
        .error, .success {
            border-radius: 8px;
            padding: 12px 14px;
            margin-bottom: 18px;
            font-weight: 650;
        }
        .error {
            color: var(--danger);
            background: #fff7ed;
            border: 1px solid #fed7aa;
        }
        .success {
            color: var(--success);
            background: #ecfdf5;
            border: 1px solid #bbf7d0;
        }
        hr {
            border: 0;
            height: 1px;
            background: var(--line);
            margin: 24px 0;
        }
        .checkbox-group {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
        }
        .checkbox-group label { margin-bottom: 0; color: var(--muted); font-weight: 500; }
        .checkbox-group input { width: 20px; min-height: 20px; accent-color: var(--primary); }
        .register-note {
            margin: -6px 0 16px;
            color: var(--muted);
            font-size: 0.9rem;
        }
        @media (max-width: 900px) {
            body { padding: 0; }
            .auth-shell {
                min-height: 100vh;
                grid-template-columns: 1fr;
                gap: 0;
            }
            .product-panel {
                padding: 24px 18px 8px;
            }
            .brand-mark { width: 46px; height: 46px; margin-bottom: 18px; }
            .lead { margin-top: 14px; }
            .feature-grid {
                grid-template-columns: 1fr;
                gap: 8px;
                margin-top: 18px;
            }
            .feature { min-height: auto; padding: 12px; }
            .auth-card {
                border-radius: 8px 8px 0 0;
                border-left: 0;
                border-right: 0;
                border-bottom: 0;
                box-shadow: 0 -12px 40px rgba(16, 32, 39, 0.1);
            }
        }
        @media (max-width: 520px) {
            .feature-grid { display: none; }
            h1 { font-size: 2rem; }
            .auth-card { padding: 20px 16px max(22px, env(safe-area-inset-bottom)); }
        }