:root{--bg-primary:#fff;--bg-secondary:#f5f5f7;--bg-card:#fff;--bg-input:#f0f0f2;--bg-bubble-user:#007aff;--bg-bubble-friend:#e9e9eb;--text-primary:#1d1d1f;--text-secondary:#6e6e73;--text-bubble-user:#fff;--text-bubble-friend:#1d1d1f;--border-color:#d2d2d7;--border-light:#e5e5ea;--shadow:0 1px 3px #00000014;--shadow-lg:0 4px 12px #0000001a;--radius:12px;--radius-sm:8px;--nav-height:56px}@media (prefers-color-scheme:dark){:root{--bg-primary:#000;--bg-secondary:#1c1c1e;--bg-card:#1c1c1e;--bg-input:#2c2c2e;--bg-bubble-user:#0a84ff;--bg-bubble-friend:#2c2c2e;--text-primary:#f5f5f7;--text-secondary:#98989d;--text-bubble-user:#fff;--text-bubble-friend:#f5f5f7;--border-color:#38383a;--border-light:#2c2c2e;--shadow:0 1px 3px #0000004d;--shadow-lg:0 4px 12px #0006}}*{box-sizing:border-box;margin:0;padding:0}html,body,#root{width:100%;height:100%;overflow:hidden}body{background:var(--bg-primary);color:var(--text-primary);-webkit-font-smoothing:antialiased;font-family:-apple-system,BlinkMacSystemFont,SF Pro Text,Segoe UI,Roboto,sans-serif}.app{flex-direction:column;height:100%;display:flex}.app-content{flex:1;overflow:hidden}.bottom-nav{border-top:1px solid var(--border-color);background:var(--bg-secondary);padding-bottom:env(safe-area-inset-bottom,0);display:flex}.bottom-nav button{color:var(--text-secondary);cursor:pointer;background:0 0;border:none;flex-direction:column;flex:1;align-items:center;gap:2px;padding:8px 0 6px;font-size:10px;font-weight:500;display:flex}.bottom-nav button.active{color:#007aff}@media (prefers-color-scheme:dark){.bottom-nav button.active{color:#0a84ff}}.bottom-nav button svg{width:24px;height:24px}@media (width>=768px){.bottom-nav{display:none}.desktop-nav{border-bottom:1px solid var(--border-color);background:var(--bg-secondary);gap:4px;padding:0 24px;display:flex}.desktop-nav button{color:var(--text-secondary);cursor:pointer;background:0 0;border:none;border-bottom:2px solid #0000;padding:12px 20px;font-size:14px;font-weight:500}.desktop-nav button.active{color:#007aff;border-bottom-color:#007aff}}@media (width<=767px){.desktop-nav{display:none}}.friend-selector{-webkit-overflow-scrolling:touch;scrollbar-width:none;border-bottom:1px solid var(--border-light);background:var(--bg-secondary);gap:8px;padding:12px 16px;display:flex;overflow-x:auto}.friend-selector::-webkit-scrollbar{display:none}.friend-chip{border:1.5px solid var(--border-color);background:var(--bg-card);cursor:pointer;white-space:nowrap;border-radius:20px;flex-shrink:0;align-items:center;gap:6px;padding:6px 12px 6px 6px;transition:all .15s;display:flex}.friend-chip.active{border-color:var(--friend-color);background:var(--bg-card);box-shadow:0 0 0 1px var(--friend-color)}.friend-avatar{color:#fff;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:28px;height:28px;font-size:13px;font-weight:600;display:flex}.friend-name{color:var(--text-primary);font-size:13px;font-weight:500}@media (width>=768px){.friend-selector{border-bottom:none;border-right:1px solid var(--border-light);flex-direction:column;flex-shrink:0;width:180px;padding:12px;overflow:visible auto}.friend-chip{padding:8px 12px 8px 8px}.friend-avatar{width:32px;height:32px;font-size:14px}.friend-name{font-size:14px}}.bubble-row{align-items:flex-end;gap:8px;padding:2px 16px;display:flex}.bubble-row.user{justify-content:flex-end}.bubble-row.friend{justify-content:flex-start}.bubble-avatar{color:#fff;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:28px;height:28px;font-size:12px;font-weight:600;display:flex}.bubble-content{flex-direction:column;max-width:75%;display:flex}.bubble-sender{margin-bottom:2px;padding-left:4px;font-size:11px;font-weight:600}.bubble{word-wrap:break-word;white-space:pre-wrap;border-radius:18px;padding:8px 12px;font-size:15px;line-height:1.4}.bubble.user{background:var(--bg-bubble-user);color:var(--text-bubble-user);border-bottom-right-radius:4px}.bubble.friend{border-bottom-left-radius:4px}.cursor{opacity:.6;font-weight:300;animation:.8s step-end infinite blink}@keyframes blink{50%{opacity:0}}.chat-input-bar{border-top:1px solid var(--border-light);background:var(--bg-secondary);padding:8px 12px;padding-bottom:calc(8px + env(safe-area-inset-bottom,0));align-items:flex-end;gap:8px;display:flex}.chat-input{border:1px solid var(--border-color);background:var(--bg-input);color:var(--text-primary);resize:none;border-radius:20px;outline:none;flex:1;max-height:120px;padding:10px 14px;font-family:inherit;font-size:15px;line-height:1.4}.chat-input:focus{border-color:#007aff}.chat-input::placeholder{color:var(--text-secondary)}.send-btn{color:#fff;cursor:pointer;background:#007aff;border:none;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:36px;height:36px;transition:opacity .15s;display:flex}.send-btn:disabled{opacity:.4;cursor:default}@media (prefers-color-scheme:dark){.send-btn{background:#0a84ff}}.chat-page{flex-direction:column;height:100%;display:flex}.chat-area{flex-direction:column;flex:1;display:flex;overflow:hidden}.chat-empty{color:var(--text-secondary);flex-direction:column;flex:1;justify-content:center;align-items:center;gap:8px;display:flex}.chat-empty-icon{margin-bottom:8px;font-size:48px}.chat-empty h2{color:var(--text-primary);font-size:22px;font-weight:700}.chat-empty p{font-size:15px}.chat-divider{width:200px;color:var(--text-secondary);align-items:center;gap:12px;margin-top:12px;font-size:13px;display:flex}.chat-divider:before,.chat-divider:after{content:"";background:var(--border-color);flex:1;height:1px}.simulate-section{flex-direction:column;align-items:center;gap:14px;margin-top:4px;display:flex}.topic-picker{flex-wrap:wrap;justify-content:center;gap:6px;max-width:340px;display:flex}.topic-chip{border:1px solid var(--border-color);background:var(--bg-card);color:var(--text-secondary);cursor:pointer;border-radius:16px;padding:6px 12px;font-family:inherit;font-size:12px;transition:all .15s}.topic-chip.active{color:#007aff;background:#007aff15;border-color:#007aff}@media (prefers-color-scheme:dark){.topic-chip.active{color:#0a84ff;background:#0a84ff20;border-color:#0a84ff}}.chat-topbar{border-bottom:1px solid var(--border-light);background:var(--bg-secondary);justify-content:space-between;align-items:center;padding:10px 16px;display:flex}.chat-topbar-left{align-items:center;gap:8px;display:flex}.chat-topbar-avatar{color:#fff;border-radius:50%;justify-content:center;align-items:center;width:28px;height:28px;font-size:12px;font-weight:600;display:flex}.chat-topbar-name{font-size:15px;font-weight:600}.asker-picker{color:var(--text-secondary);align-items:center;gap:6px;font-size:13px;display:flex}.asker-picker select{border:1px solid var(--border-color);background:var(--bg-input);color:var(--text-primary);cursor:pointer;border-radius:8px;outline:none;padding:4px 8px;font-family:inherit;font-size:13px}.asker-picker select:focus{border-color:#007aff}.chat-messages{flex-direction:column;flex:1;gap:4px;padding:12px 0;display:flex;overflow-y:auto}.simulate-btn{border:1px solid var(--border-color);background:var(--bg-card);color:var(--text-primary);cursor:pointer;border-radius:20px;margin-top:16px;padding:12px 24px;font-family:inherit;font-size:14px;font-weight:500;transition:all .15s}.simulate-btn:hover{background:var(--bg-secondary);color:#007aff;border-color:#007aff}.simulate-btn:disabled{opacity:.8;cursor:default}.spinner{border:2px solid var(--border-color);vertical-align:middle;border-top-color:#007aff;border-radius:50%;width:16px;height:16px;margin-right:6px;animation:.8s linear infinite spin;display:inline-block}@media (prefers-color-scheme:dark){.spinner{border-color:var(--border-color);border-top-color:#0a84ff}}@keyframes spin{to{transform:rotate(360deg)}}.back-btn{color:var(--text-primary);cursor:pointer;background:0 0;border:none;margin-right:4px;padding:4px 10px;font-size:18px}.simulate-btn-small{border:1px solid var(--border-color);background:var(--bg-card);color:var(--text-primary);cursor:pointer;border-radius:14px;padding:6px 14px;font-family:inherit;font-size:12px;font-weight:500}.simulate-btn-small:hover{color:#007aff;border-color:#007aff}@media (width>=768px){.chat-page{flex-direction:row}.chat-area{flex:1}}.fun-facts h3{margin-bottom:12px;font-size:16px;font-weight:600}.facts-scroll{-webkit-overflow-scrolling:touch;scrollbar-width:none;gap:12px;padding-bottom:4px;display:flex;overflow-x:auto}.facts-scroll::-webkit-scrollbar{display:none}.fact-card{background:var(--bg-card);border:1px solid var(--border-light);border-radius:var(--radius-sm);min-width:260px;max-width:300px;box-shadow:var(--shadow);border-left:3px solid;flex-shrink:0;align-items:flex-start;gap:10px;padding:12px;display:flex}.fact-icon{flex-shrink:0;font-size:24px}.fact-title{margin-bottom:2px;font-size:13px;font-weight:600}.fact-desc{color:var(--text-secondary);font-size:12px;line-height:1.4}.heatmap-container{-webkit-overflow-scrolling:touch;overflow-x:auto}.heatmap-grid{grid-template-columns:36px repeat(24,1fr);gap:2px;min-width:400px;display:grid}.heatmap-hour-label{color:var(--text-secondary);text-align:center;font-size:10px}.heatmap-day-label{color:var(--text-secondary);align-items:center;font-size:11px;display:flex}.heatmap-cell{aspect-ratio:1;border-radius:3px;min-width:12px;min-height:12px}.reply-network-container{-webkit-overflow-scrolling:touch;overflow-x:auto}.reply-network-grid{gap:2px;min-width:400px;display:grid}.rn-header{text-align:center;padding:4px 0;font-size:10px;font-weight:600}.rn-row-label{align-items:center;padding-right:4px;font-size:10px;font-weight:600;display:flex}.rn-cell{aspect-ratio:1;color:var(--text-primary);border-radius:3px;justify-content:center;align-items:center;min-height:28px;font-size:9px;display:flex}.person-cards-grid{flex-direction:column;gap:8px;display:flex}.person-card{border:1px solid var(--border-light);border-radius:var(--radius-sm);cursor:pointer;border-left:3px solid;padding:12px;transition:background .15s}.person-card:hover{background:var(--bg-secondary)}.person-card-header{align-items:center;gap:10px;display:flex}.person-card-avatar{color:#fff;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:32px;height:32px;font-size:14px;font-weight:600;display:flex}.person-card-info{flex:1}.person-card-name{font-size:14px;font-weight:600}.person-card-count{color:var(--text-secondary);font-size:12px}.person-card-chevron{color:var(--text-secondary);font-size:10px}.person-card-details{border-top:1px solid var(--border-light);flex-direction:column;gap:8px;margin-top:12px;padding-top:12px;display:flex}.detail-row{justify-content:space-between;font-size:13px;display:flex}.detail-row span:first-child{color:var(--text-secondary)}.detail-row span:last-child{font-weight:500}.ai-disclaimer{color:var(--text-secondary);background:var(--bg-input);border-radius:var(--radius-sm);margin-bottom:14px;padding:8px 12px;font-size:12px;font-style:italic}.profile-cards-grid{flex-direction:column;gap:10px;display:flex}.profile-card{border:1px solid var(--border-light);border-radius:var(--radius-sm);cursor:pointer;border-left:3px solid;padding:14px;transition:background .15s}.profile-card:hover{background:var(--bg-secondary)}.profile-card-header{align-items:center;gap:10px;display:flex}.profile-card-avatar{color:#fff;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:36px;height:36px;font-size:15px;font-weight:600;display:flex}.profile-card-info{flex:1}.profile-card-name{font-size:15px;font-weight:600}.profile-card-tone{color:var(--text-secondary);font-size:12px}.profile-card-chevron{color:var(--text-secondary);font-size:10px}.profile-card-summary{color:var(--text-secondary);margin-top:10px;font-size:13px;line-height:1.5}.profile-card-tap-hint{color:#007aff;margin-top:8px;font-size:12px;font-weight:500}@media (prefers-color-scheme:dark){.profile-card-tap-hint{color:#0a84ff}}.profile-card-details{border-top:1px solid var(--border-light);flex-direction:column;gap:14px;margin-top:14px;padding-top:14px;display:flex}.profile-section{flex-direction:column;gap:4px;display:flex}.profile-label{color:var(--text-secondary);text-transform:uppercase;letter-spacing:.5px;font-size:12px;font-weight:600}.profile-value{font-size:13px;line-height:1.5}.profile-tags{flex-wrap:wrap;gap:6px;display:flex}.profile-tag{background:var(--bg-input);color:var(--text-primary);border-radius:10px;padding:3px 8px;font-size:12px}.profile-quirks{flex-direction:column;gap:4px;padding-left:18px;font-size:13px;line-height:1.5;display:flex}.profile-quirks li{color:var(--text-primary)}.stats-page{-webkit-overflow-scrolling:touch;height:100%;padding:16px;padding-bottom:calc(16px + env(safe-area-inset-bottom,0));overflow-y:auto}.stats-header{margin-bottom:20px}.stats-header h1{font-size:24px;font-weight:700}.stats-subtitle{color:var(--text-secondary);margin-top:4px;font-size:13px}.stats-grid{flex-direction:column;gap:16px;display:flex}.stat-card{background:var(--bg-card);border:1px solid var(--border-light);border-radius:var(--radius);box-shadow:var(--shadow);padding:16px}.stat-card h3{margin-bottom:12px;font-size:16px;font-weight:600}@media (width>=768px){.stats-page{padding:24px 32px}.stats-header h1{font-size:28px}.stats-grid{gap:20px}}