:root{--accent:gold;--bg-app:#050510;--bg-card:#0d0d1f;--bg-input:#111128;--text-primary:#fff;--text-secondary:#88a;--text-muted:#557;--cyan:#00f3ff;--purple:#bc13fe;--green:#10b981;--red:#f43f5e;--amber:#f59e0b;--border:#ffffff14;--radius:12px}*{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg-app);color:var(--text-primary);min-height:100vh;font-family:Inter,sans-serif;line-height:1.5}a{color:inherit;text-decoration:none}.calc-breadcrumb{color:var(--text-muted);padding:10px 24px;font-size:.79rem}.calc-breadcrumb a{color:var(--text-secondary)}.main-container{max-width:1200px;margin:0 auto;padding:24px}.calc-title{margin-bottom:8px;font-size:2rem;font-weight:700}.calc-subtitle{color:var(--text-secondary);margin-bottom:24px}.tab-nav{border:1px solid var(--border);background:#ffffff08;border-radius:10px;gap:3px;margin-bottom:24px;padding:4px;display:flex;overflow-x:auto}.tab-btn{color:var(--text-secondary);cursor:pointer;white-space:nowrap;background:0 0;border:1px solid #0000;border-radius:7px;flex-shrink:0;padding:9px 22px;font-family:inherit;font-size:.9rem;transition:all .2s}.tab-btn:hover{color:var(--text-primary);border-color:var(--border);background:#ffffff0d}.tab-btn.active{color:var(--accent);background:#ffd7001a;border-color:#ffd7004d;font-weight:600;box-shadow:0 1px 4px #0000004d}.tab-content{display:none}.tab-content.active{display:block}.calc-layout{grid-template-columns:340px 1fr;align-items:start;gap:20px;display:grid}@media (width<=900px){.calc-layout{grid-template-columns:minmax(0,1fr);overflow:hidden}}.card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:20px}.input-card{border-left:3px solid var(--cyan)}.result-card{border-left:3px solid var(--purple)}.form-group{margin-bottom:16px}.form-label{color:var(--text-secondary);margin-bottom:6px;font-size:.82rem;font-weight:500;display:block}.form-input,.form-select{background:var(--bg-input);border:1px solid var(--border);width:100%;color:var(--text-primary);border-radius:8px;padding:10px 14px;font-family:inherit;font-size:.92rem;transition:border-color .2s}.form-input:focus,.form-select:focus{border-color:var(--accent);outline:none}.form-select option{background:var(--bg-card)}.section-title{margin-bottom:14px;font-size:1rem;font-weight:700}.hero-result{text-align:center;border-radius:var(--radius);background:linear-gradient(135deg,#ffd7001a,#ffd7000a);border:1px solid #ffd70040;margin-bottom:16px;padding:24px}.hero-label{color:var(--text-muted);text-transform:uppercase;letter-spacing:.08em;margin-bottom:6px;font-size:.78rem}.hero-value{color:var(--accent);font-size:2.2rem;font-weight:800;line-height:1.1}.hero-sub{color:var(--text-secondary);margin-top:6px;font-size:.87rem}.stocking-badge{letter-spacing:.04em;border-radius:20px;margin-top:8px;padding:3px 12px;font-size:.72rem;font-weight:700;display:inline-block}.stocking-badge.good{color:#10b981;background:#10b98126}.stocking-badge.moderate{color:#f59e0b;background:#f59e0b26}.stocking-badge.heavy{color:#f43f5e;background:#f43f5e26}.formula-strip{flex-wrap:wrap;gap:8px;margin-bottom:16px;display:flex}.formula-pill{color:var(--accent);white-space:nowrap;background:#ffd7001a;border:1px solid #ffd7004d;border-radius:20px;padding:5px 14px;font-size:.75rem}.density-bar{background:#ffffff0f;border-radius:5px;height:10px;margin-top:6px;overflow:hidden}.density-fill{border-radius:5px;height:100%;transition:width .4s,background .4s}.stat-grid{grid-template-columns:repeat(3,1fr);gap:12px;margin-bottom:20px;display:grid}@media (width<=600px){.stat-grid{grid-template-columns:repeat(2,1fr)}}.stat-card{background:var(--bg-card);border:1px solid var(--border);border-left:3px solid var(--purple);border-radius:var(--radius);padding:13px}.stat-label{color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em;margin-bottom:5px;font-size:.71rem}.stat-value{color:var(--text-primary);font-size:1.05rem;font-weight:700}.alert-stack{flex-direction:column;gap:8px;margin-bottom:16px;display:flex}.alert{border-left:3px solid;border-radius:8px;padding:10px 14px;font-size:.84rem}.alert-info{border-color:var(--cyan);color:#7ffffd;background:#00f3ff12}.alert-success{border-color:var(--green);color:#6ee7b7;background:#10b98114}.alert-warn{border-color:var(--amber);color:#fcd34d;background:#f59e0b14}.inner-chart-tabs{gap:6px;margin-bottom:10px;display:flex}.inner-tab-btn{background:var(--bg-input);border:1px solid var(--border);color:var(--text-secondary);cursor:pointer;border-radius:6px;padding:5px 14px;font-family:inherit;font-size:.78rem;transition:all .2s}.inner-tab-btn:hover{color:var(--text-primary)}.inner-tab-btn.active{color:var(--accent);background:#ffd7001f;border-color:#ffd70059}.chart-wrap-inline{background:#ffffff05;border:1px solid #ffffff12;border-radius:10px;margin-bottom:16px;padding:14px}.pet-interp-card{border-left:3px solid var(--cyan);color:var(--text-secondary);background:#00f3ff0d;border-radius:6px;margin-top:10px;padding:10px 14px;font-size:.84rem;line-height:1.55}.fish-row{grid-template-columns:1fr 70px 80px 32px;align-items:center;gap:6px;margin-bottom:8px;display:grid}.fish-row input{background:var(--bg-input);border:1px solid var(--border);color:var(--text-primary);border-radius:6px;width:100%;padding:7px 10px;font-family:inherit;font-size:.83rem;transition:border-color .2s}.fish-row input:focus{border-color:var(--accent);outline:none}@media (width<=600px){.fish-row{grid-template-columns:1fr 56px 68px 30px;gap:4px}.fish-row input{padding:6px 8px;font-size:.78rem}}.remove-btn{color:var(--red);cursor:pointer;background:#f43f5e1a;border:1px solid #f43f5e4d;border-radius:6px;padding:4px 8px;font-size:1rem;transition:background .2s}.remove-btn:hover{background:#f43f5e33}.add-fish-btn{color:var(--accent);cursor:pointer;background:#ffd70014;border:1px solid #ffd70040;border-radius:8px;padding:8px 16px;font-family:inherit;font-size:.85rem;transition:background .2s}.add-fish-btn:hover{background:#ffd70024}.preset-btn{color:#00d1c1;cursor:pointer;background:#00d1c114;border:1px solid #00d1c140;border-radius:8px;margin-bottom:6px;margin-right:6px;padding:6px 12px;font-family:inherit;font-size:.8rem;transition:background .2s}.preset-btn:hover{background:#00d1c126}.shape-chips{flex-wrap:wrap;gap:8px;margin-bottom:16px;display:flex}.shape-chip{border:1px solid var(--border);background:var(--bg-input);color:var(--text-secondary);cursor:pointer;border-radius:8px;padding:7px 14px;font-family:inherit;font-size:.83rem;transition:all .2s}.shape-chip:hover{color:var(--text-primary)}.shape-chip.active{border-color:var(--accent);color:var(--accent);background:#ffd7001f}.data-table{border-collapse:collapse;width:100%;font-size:.87rem}.data-table th{color:var(--accent);text-align:left;border-bottom:1px solid var(--border);background:#ffd7001a;padding:10px 14px;font-weight:600}.data-table td{color:var(--text-secondary);border-bottom:1px solid #ffffff0a;padding:9px 14px}.data-table tr:hover td{background:#ffffff05}.data-table tr.current-row td{color:var(--accent);background:#ffd70014;font-weight:600}.tank-spotlight{background:#ffd70014;border:1px solid #ffd70040;border-radius:10px;flex-wrap:wrap;align-items:center;gap:20px;margin-bottom:18px;padding:14px 20px;display:flex}.spotlight-label{color:var(--text-muted);text-transform:uppercase;letter-spacing:.06em;margin-bottom:2px;font-size:.72rem}.spotlight-value{color:var(--accent);font-size:1.7rem;font-weight:800;line-height:1.1}.spotlight-dims{color:var(--text-secondary);margin-top:4px;font-size:.82rem}.custom-vol-result{color:var(--text-secondary);background:#00f3ff0d;border:1px solid #00f3ff33;border-radius:8px;padding:12px 16px;font-size:.87rem;line-height:1.6}.custom-vol-result strong{color:var(--text-primary)}.faq-section{max-width:1200px;margin:48px auto 0;padding:0 24px 48px}.faq-section h2{margin-bottom:20px;font-size:1.5rem}.faq-item{border:1px solid var(--border);border-radius:8px;margin-bottom:8px;overflow:hidden}.faq-q{cursor:pointer;justify-content:space-between;align-items:center;padding:13px 18px;font-size:.93rem;font-weight:500;display:flex}.faq-a{color:var(--text-secondary);padding:0 18px 13px;font-size:.87rem;line-height:1.6;display:none}.faq-item.open .faq-a{display:block}.related-section{max-width:1200px;margin:0 auto;padding:0 24px 48px}.related-section h2{margin-bottom:16px;font-size:1.3rem}.related-grid{grid-template-columns:repeat(auto-fill,minmax(185px,1fr));gap:12px;display:grid}.related-card{background:var(--bg-card);border:1px solid var(--border);color:var(--text-secondary);border-radius:8px;padding:13px;font-size:.87rem;transition:all .2s}.related-card:hover{border-color:var(--accent);color:var(--text-primary)}@media (width<=768px){.main-container{padding:16px}.calc-title{font-size:1.5rem}.tab-btn{padding:8px 14px;font-size:.82rem}}[data-theme=light]{--bg-app:#e8edf5;--bg-card:#fff;--bg-input:#f0f4f9;--text-primary:#0f172a;--text-secondary:#334155;--text-muted:#64748b;--border:#0000001f;--red:#dc2626;--green:#059669;--amber:#d97706}[data-theme=light] body{color:#0f172a;background:#e8edf5}[data-theme=light] .card{background:#fff;border-color:#0000001f;box-shadow:0 2px 10px #00000012}[data-theme=light] .input-card{border-left-color:#0e7490}[data-theme=light] .result-card{border-left-color:#7c3aed}[data-theme=light] .tab-nav{background:#00000008;border-color:#0000001a}[data-theme=light] .tab-btn{color:#475569}[data-theme=light] .tab-btn:hover{color:#0f172a;background:#0000000d;border-color:#0000001f}[data-theme=light] .tab-btn.active{color:#a16207;background:#a162071a;border-color:#a162074d;box-shadow:0 1px 4px #00000014}[data-theme=light] .hero-result{background:linear-gradient(135deg,#a1620714,#a1620708);border-color:#a1620738}[data-theme=light] .hero-value{color:#a16207}[data-theme=light] .hero-sub{color:#475569}[data-theme=light] .formula-strip{background:0 0}[data-theme=light] .formula-pill{color:#334155;background:#0000000d;border-color:#00000026}[data-theme=light] .density-bar{background:#00000014}[data-theme=light] .stat-card{background:#fff;border-color:#0000001f #0000001f #0000001f #7c3aed;box-shadow:0 1px 4px #0000000f}[data-theme=light] .stat-label{color:#64748b}[data-theme=light] .stat-value{color:#0f172a}[data-theme=light] .alert-info{color:#0e7490;background:#eff9fb;border-color:#0e7490}[data-theme=light] .alert-success{color:#059669;background:#f0fdf4;border-color:#059669}[data-theme=light] .alert-warn{color:#92400e;background:#fffbeb;border-color:#d97706}[data-theme=light] .shape-chip{color:#334155;background:#f0f4f9;border-color:#00000026}[data-theme=light] .shape-chip:hover{color:#0f172a;border-color:#00000040}[data-theme=light] .shape-chip.active{color:#a16207;background:#a162071f;border-color:#a1620766}[data-theme=light] .fish-row input{color:#0f172a;background:#e8eef4;border-color:#0000001f}[data-theme=light] .fish-row input:focus{border-color:#a16207}[data-theme=light] .fish-row input::placeholder{color:#00000059}[data-theme=light] .remove-btn{color:#dc2626;background:#dc262612;border-color:#dc262633}[data-theme=light] .add-fish-btn{color:#a16207;background:#a1620712;border-color:#a1620740}[data-theme=light] .preset-btn{color:#334155;background:#0000000a;border-color:#00000026}[data-theme=light] .inner-tab-btn{color:#334155;background:#edf2f9;border-color:#0000001f}[data-theme=light] .inner-tab-btn:hover{color:#0f172a}[data-theme=light] .inner-tab-btn.active{color:#a16207;background:#a162071a;border-color:#a162074d}[data-theme=light] .chart-wrap-inline{background:#f0f4f9;border-color:#0000001a}[data-theme=light] .pet-interp-card{color:#334155;background:#0e74900f;border-left-color:#0e7490}[data-theme=light] .tank-spotlight{background:#a162070f;border-color:#a1620738}[data-theme=light] .spotlight-label{color:#64748b}[data-theme=light] .spotlight-value{color:#a16207}[data-theme=light] .spotlight-dims{color:#475569}[data-theme=light] .custom-vol-result{color:#334155;background:#0e74900f;border-color:#0e749040}[data-theme=light] .custom-vol-result strong{color:#0f172a}[data-theme=light] .data-table th{color:#a16207;background:#a1620714;border-bottom-color:#0000001f}[data-theme=light] .data-table td{color:#334155;border-bottom-color:#00000012}[data-theme=light] .data-table tr:hover td{background:#00000008}[data-theme=light] .data-table tr.current-row td{color:#a16207;background:#a1620714}[data-theme=light] .stocking-badge.good{color:#059669;background:#0596691f}[data-theme=light] .stocking-badge.moderate{color:#d97706;background:#d977061f}[data-theme=light] .stocking-badge.heavy{color:#dc2626;background:#dc26261f}[data-theme=light] .faq-item{background:#fff;border-color:#0000001a}[data-theme=light] .faq-q{color:#0f172a}[data-theme=light] .faq-a{color:#475569}[data-theme=light] .related-card{color:#334155;background:#fff;border-color:#0000001f}[data-theme=light] .related-card:hover{color:#a16207;border-color:#a1620766}[data-theme=light] .section-title{color:#0f172a}[data-theme=light] .form-label,[data-theme=light] .calc-breadcrumb a{color:#475569}[data-theme=light] .u-title{color:#0e7490}[data-theme=light] .ob-card{background:#fff;border-color:#0000001a;box-shadow:0 1px 4px #0000000f}[data-theme=light] .ob-card h3{color:#0f172a}[data-theme=light] .ob-card p{color:#475569}[data-theme=light] .ob-num{color:#a16207;opacity:.65}[data-theme=light] .g-item2{background:#edf2f9;border-color:#00000014}[data-theme=light] .g-item2 dt{color:#0e7490}[data-theme=light] .g-item2 dd{color:#475569}[data-theme=light] .ex-card2{background:#fff;border-color:#0000001a}[data-theme=light] .ex-card2 h3{color:#0f172a}[data-theme=light] .ex-card2 p{color:#475569}[data-theme=light] .ex-badge2{color:#0e7490;background:#0e74901a}[data-theme=light] .ex-scenario2{color:#0f172a}[data-theme=light] .ex-result2{color:#0e7490}[data-theme=light] .fp2{background:#7c3aed0f;border-color:#7c3aed33}[data-theme=light] .fp2-label{color:#7c3aed}[data-theme=light] .fp2-eq{color:#3b1d8a}[data-theme=light] .fp2-desc,[data-theme=light] .article-body2 p{color:#475569}[data-theme=light] .article-body2 h3{color:#0f172a}[data-theme=light] .rel-card2{color:#475569;background:#fff;border-color:#0000001a}[data-theme=light] .rel-card2:hover{color:#0e7490;background:#0e74900a;border-color:#0e749059}[data-theme=light] .rc-title2{color:#0f172a}[data-theme=light] .act-btn2{color:#334155;background:#edf2f9;border-color:#0000001f}[data-theme=light] .act-btn2:hover{color:#0e7490;background:#0e749014;border-color:#0e74904d}[data-theme=light] .faq-section-extra .faq-item{background:#fff;border-color:#0000001a}[data-theme=light] .faq-section-extra .faq-q{color:#0f172a}[data-theme=light] .faq-section-extra .faq-a{color:#475569}