:root{--bg:#fff;--bg-secondary:#f2f2f2;--surface:#fff;--text:#1a1a1a;--text-secondary:gray;--accent:#3fb430;--accent-dark:#2e8a22;--accent-light:#3fb4301a;--orange:#ff9500;--border:#e5e5e5;--spec-bg:#e8ece5;--nav-height:58px;-webkit-font-smoothing:antialiased;color:var(--text);background:var(--bg);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif}*{box-sizing:border-box;margin:0;padding:0}body,html{background:#ddd;height:100%;overflow:hidden}.app-container{background:var(--bg);flex-direction:column;max-width:430px;height:100dvh;margin:0 auto;display:flex;position:relative;overflow:hidden;box-shadow:0 0 40px #0003}.header{background:var(--bg);z-index:10;flex-shrink:0;align-items:center;height:52px;padding:0 20px;display:flex}.header-logo{color:var(--text);letter-spacing:-.02em;align-items:center;gap:6px;font-size:1.25rem;font-weight:800;display:flex}.page-header{background:var(--bg);padding:22px 20px 14px}.page-title{color:var(--text);font-size:2rem;font-weight:800;line-height:1.1}.page-subtitle{color:var(--text-secondary);margin-top:4px;font-size:.88rem}.session-screen{padding-bottom:var(--nav-height);flex-direction:column;flex:1;display:flex;overflow:hidden}.spectrogram-container{background:var(--spec-bg);flex-shrink:0;height:90px;position:relative;overflow:hidden}.spectrogram-canvas{width:100%;height:100%;display:block}.session-location-bar{color:var(--accent);text-align:right;background:var(--bg);border-bottom:1px solid var(--border);flex-shrink:0;padding:8px 20px;font-size:.78rem}.session-content{-webkit-overflow-scrolling:touch;background:var(--bg);flex:1;overflow-y:auto}.session-listening-center{text-align:center;flex-direction:column;justify-content:center;align-items:center;height:100%;min-height:200px;padding:0 32px;display:flex}.session-listening-title{color:var(--text);font-size:1.35rem;font-weight:600;line-height:1.3}.session-listening-sub{color:var(--text-secondary);margin-top:6px;font-size:.88rem}.screen-content{-webkit-overflow-scrolling:touch;background:var(--bg);flex:1;overflow-y:auto}.tab-content{padding-bottom:calc(var(--nav-height) + 16px)}.list-section-header{letter-spacing:.08em;text-transform:uppercase;color:var(--text-secondary);background:var(--bg);z-index:2;border-bottom:1px solid var(--border);padding:14px 20px 8px;font-size:.68rem;font-weight:700;position:sticky;top:0}.empty-state{text-align:center;color:var(--text-secondary);flex-direction:column;justify-content:center;align-items:center;gap:12px;padding:48px 32px;display:flex}.empty-state-icon{opacity:.35;font-size:2.8rem}.empty-state p{font-size:.9rem;line-height:1.55}.flat-list{background:var(--bg)}.flat-list-item{border-bottom:1px solid var(--border);background:var(--bg);align-items:center;padding:11px 20px;transition:background .1s;display:flex}.flat-list-item:active{background:var(--bg-secondary)}.flat-photo{background:var(--bg-secondary);border-radius:6px;flex-shrink:0;width:82px;height:82px;margin-right:16px;overflow:hidden}.flat-photo img{object-fit:cover;width:100%;height:100%;display:block}.flat-photo-right{background:var(--bg-secondary);border-radius:6px;flex-shrink:0;width:72px;height:72px;margin-left:16px;overflow:hidden}.flat-photo-right img{object-fit:cover;width:100%;height:100%;display:block}.flat-info{flex:1;min-width:0}.flat-name{color:var(--text);white-space:nowrap;text-overflow:ellipsis;margin-bottom:3px;font-size:1.02rem;font-weight:500;overflow:hidden}.flat-sub{color:var(--text-secondary);font-size:.8rem}.sighting-item.highlight{border-left:3px solid var(--accent);background:#3fb4300f;padding-left:17px}.confirm-button{background:var(--accent);color:#fff;cursor:pointer;white-space:nowrap;border:none;border-radius:20px;flex-shrink:0;margin-left:10px;padding:7px 11px;font-size:.73rem;font-weight:600;transition:background .15s,transform .1s}.confirm-button:active{background:var(--accent-dark);transform:scale(.96)}.controls-container{background:var(--bg);flex-shrink:0;justify-content:center;align-items:center;gap:16px;padding:16px 20px;display:flex}.record-button{background:var(--accent);color:#fff;cursor:pointer;border:none;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:56px;height:56px;transition:transform .1s,background .15s;display:flex}.record-button:active{transform:scale(.93)}.record-button.recording{background:#e53935}.controls-timer{color:var(--text-secondary);font-variant-numeric:tabular-nums;min-width:42px;font-size:.88rem}.bottom-nav{height:var(--nav-height);background:var(--surface);border-top:1px solid var(--border);z-index:30;align-items:stretch;display:flex;position:absolute;bottom:0;left:0;right:0}.nav-item{cursor:pointer;color:#aaa;background:0 0;border:none;flex-direction:column;flex:1;justify-content:center;align-items:center;gap:3px;padding:6px 0;transition:color .15s;display:flex}.nav-item.active{color:var(--accent)}.nav-label{letter-spacing:.01em;font-size:.62rem;font-weight:600}.species-detail{background:var(--bg);z-index:50;-webkit-overflow-scrolling:touch;position:absolute;inset:0;overflow-y:auto}.detail-hero{background:var(--bg-secondary);justify-content:center;align-items:center;height:42vh;min-height:200px;display:flex;position:relative;overflow:hidden}.detail-hero-img{object-fit:cover;width:100%;height:100%;display:block}.detail-hero-fallback-emoji{opacity:.3;font-size:5rem}.detail-hero-gradient{pointer-events:none;background:linear-gradient(#0000,#00000073);height:55%;position:absolute;bottom:0;left:0;right:0}.detail-back{color:#fff;cursor:pointer;-webkit-backdrop-filter:blur(4px);background:#00000061;border:none;border-radius:20px;align-items:center;gap:3px;padding:6px 13px 6px 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16px}.detail-fun-fact-label{text-transform:uppercase;letter-spacing:.08em;color:var(--accent-dark);margin-bottom:6px;font-size:.68rem;font-weight:700}.detail-fun-fact-text{color:var(--text);font-size:.9rem;line-height:1.65}.header-back-btn{cursor:pointer;color:var(--accent);background:0 0;border:none;align-items:center;gap:2px;padding:0;font-size:.95rem;font-weight:600;display:flex}.home-screen{padding-bottom:calc(var(--nav-height) + 16px)}.home-hero{background:var(--bg-secondary);justify-content:center;align-items:center;height:44vh;min-height:220px;display:flex;position:relative;overflow:hidden}.home-hero-img{object-fit:cover;width:100%;height:100%;display:block}.home-hero-emoji{opacity:.35;font-size:5rem}.home-hero-gradient{pointer-events:none;background:linear-gradient(#0000,#0009);height:55%;position:absolute;bottom:0;left:0;right:0}.home-hero-caption{position:absolute;bottom:16px;left:18px;right:18px}.home-hero-eyebrow{letter-spacing:.08em;text-transform:uppercase;color:#fffc;margin-bottom:3px;font-size:.68rem;font-weight:700}.home-hero-name{color:#fff;font-size:1.4rem;font-weight:700;line-height:1.2}.home-social-row{align-items:center;gap:12px;padding:20px;display:flex}.home-divider{background:var(--border);flex:1;height:1px}.home-social-text{color:var(--text-secondary);white-space:nowrap;font-size:.82rem}.home-actions{justify-content:center;align-items:flex-start;gap:24px;padding:8px 20px 28px;display:flex}.home-action-item{flex-direction:column;align-items:center;gap:10px;display:flex}.home-action-btn{cursor:pointer;border:none;border-radius:50%;justify-content:center;align-items:center;transition:transform .1s,opacity .15s;display:flex}.home-action-btn:active{transform:scale(.93)}.home-action-btn:disabled{opacity:.45;cursor:default}.home-action-secondary{color:#555;background:#ebebeb;width:70px;height:70px}.home-action-primary{background:var(--accent);color:#fff;width:88px;height:88px;box-shadow:0 4px 22px #3fb4306b}.home-action-label{color:var(--text-secondary);font-size:.78rem;font-weight:500}.home-action-label-primary{color:var(--accent);font-weight:600}.home-sessions-card{background:var(--bg-secondary);cursor:pointer;color:var(--text-secondary);border:none;border-radius:12px;align-items:center;gap:10px;width:calc(100% - 32px);margin:0 16px;padding:14px 18px;font-size:.88rem;transition:background .1s;display:flex}.home-sessions-card:active{background:#e0e0e0}.home-sessions-icon{flex-shrink:0}