:root{--color-bg:#f5f5f5;--color-text:#1a1a2e;--color-text-light:#4a4a6a;--color-primary:#2563eb;--color-primary-dark:#1d4ed8;--color-primary-light:#dbeafe;--color-success:#16a34a;--color-success-light:#dcfce7;--color-warning:#d97706;--color-warning-light:#fef3c7;--color-danger:#dc2626;--color-danger-light:#fee2e2;--color-white:#fff;--color-border:#d1d5db;--color-surface:#fff;--color-surface-alt:#f0f0f8;--color-shadow:#1a1a2e1f;--font-family:"Segoe UI", system-ui, -apple-system, Arial, sans-serif;--font-size-base:18px;--font-size-sm:16px;--font-size-md:20px;--font-size-lg:24px;--font-size-xl:30px;--font-size-2xl:36px;--line-height:1.6;--spacing-xs:4px;--spacing-sm:8px;--spacing-md:16px;--spacing-lg:24px;--spacing-xl:32px;--spacing-2xl:48px;--touch-target:48px;--radius-sm:6px;--radius-md:12px;--radius-lg:18px;--radius-full:9999px;--transition:.2s 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var(--transition);border-radius:50%}.onboarding-progress__dot--active{background-color:var(--color-primary);transform:scale(1.2)}.onboarding-progress__label{color:var(--color-text-light);margin-left:auto;font-size:16px}.onboarding-heading{color:var(--color-text);margin-bottom:10px;font-size:30px;font-weight:800;line-height:1.25}.onboarding-intro{color:var(--color-text-light);margin-bottom:20px;font-size:20px}.onboarding-label{color:var(--color-text);margin-bottom:12px;font-size:22px;font-weight:600;display:block}.onboarding-input{border-radius:var(--radius-md);border:2px solid var(--color-border);width:100%;min-height:60px;color:var(--color-text);background-color:var(--color-white);transition:border-color var(--transition), box-shadow var(--transition);padding:16px 20px;font-size:22px}.onboarding-input:focus{border-color:var(--color-primary);box-shadow:0 0 0 3px var(--color-primary-light);outline:none}.os-grid{grid-template-columns:1fr 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var(--spacing-lg)}.step-panel__step-text{font-size:var(--font-size-md);color:var(--color-text);font-weight:600;line-height:var(--line-height);margin:0}.step-panel__actions{gap:var(--spacing-md);flex-wrap:wrap;display:flex}.step-panel__btn{min-width:180px;font-size:var(--font-size-md);padding:var(--spacing-md) var(--spacing-lg);border-radius:var(--radius-md);cursor:pointer;min-height:56px;transition:background-color var(--transition), box-shadow var(--transition), transform var(--transition);flex:1;font-weight:700}.step-panel__btn--primary{background-color:var(--color-primary);color:var(--color-white);border:none}.step-panel__btn--primary:hover:not(:disabled){background-color:var(--color-primary-dark);box-shadow:0 4px 12px var(--color-shadow)}.step-panel__btn--secondary{background-color:var(--color-white);color:var(--color-text);border:2px solid var(--color-border)}.step-panel__btn--secondary:hover:not(:disabled){background-color:var(--color-surface-alt);border-color:var(--color-primary)}.step-panel__btn:focus-visible{outline:3px solid var(--color-primary);outline-offset:3px}.step-panel__btn:active{transform:scale(.98)}@media (width<=480px){.step-panel__actions{flex-direction:column}.step-panel__btn{width:100%;min-width:0}}.chat-window{background-color:var(--color-bg);flex-direction:column;flex:1;height:0;min-height:0;display:flex;position:relative}.connection-banner{background-color:var(--color-warning-light);color:var(--color-warning);border-bottom:2px solid var(--color-warning);text-align:center;flex-shrink:0;padding:12px 20px;font-size:18px;font-weight:600}.chat-messages{scroll-behavior:smooth;flex-direction:column;flex:1;padding:24px 20px;display:flex;overflow-y:auto}@media (width>=768px){.chat-messages{padding:28px 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