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768px){.day-selector{grid-template-columns:repeat(7,1fr)}.chart-bars{height:250px;gap:4px}.chart-bar-wrapper{height:200px}.chart-bar-value,.chart-label{font-size:10px}.analytics-filters{flex-direction:column}.filter-group{min-width:100%}.analytics-chart-section,.analytics-breakdown{padding:20px}}.pin-entry-page{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#667eea,#764ba2);padding:24px}.pin-entry-container{background:var(--bg-primary);padding:48px 32px;border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);max-width:400px;width:100%;text-align:center}.pin-entry-icon{width:80px;height:80px;margin:0 auto 24px;background:linear-gradient(135deg,var(--primary) 0%,var(--primary-light) 100%);border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff}.pin-entry-container h1{font-size:28px;font-weight:700;margin-bottom:8px;color:var(--text-primary)}.pin-entry-subtitle{font-size:14px;color:var(--text-secondary);margin-bottom:32px}.pin-entry-form{display:flex;flex-direction:column;gap:20px}.pin-input{width:100%;padding:16px;border:2px solid var(--border);border-radius:var(--radius);font-size:24px;font-weight:600;text-align:center;letter-spacing:8px;font-family:inherit;color:var(--text-primary);background:var(--bg-primary);transition:border-color var(--transition)}.pin-input:focus{outline:none;border-color:var(--primary)}.pin-input-error{border-color:var(--danger)}.pin-error{color:var(--danger);font-size:14px;margin:-10px 0 0}@media (max-width: 480px){.pin-entry-container{padding:32px 24px}.pin-entry-container h1{font-size:24px}.pin-input{font-size:20px;letter-spacing:6px}.summary-card{flex-direction:column;text-align:center}.breakdown-info{flex-direction:column;align-items:flex-start}}.ai-chat-page 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