*{box-sizing:border-box}:root{--accent:var(--calc-color-construction)}body{color:var(--calc-text-primary);background:var(--calc-bg-page) radial-gradient(circle at 10% 20%, #22d3ee12 0%, transparent 22%), radial-gradient(circle at 90% 80%, #a855f712 0%, transparent 22%);min-height:100vh;font-family:Inter,sans-serif}a{color:inherit;text-decoration:none}input::-webkit-outer-spin-button,input::-webkit-inner-spin-button{-webkit-appearance:none;margin:0}input[type=number]{-moz-appearance:textfield;appearance:textfield}.calc-hero{text-align:center;max-width:1040px;margin:0 auto;padding:28px 24px 8px}.calc-title{background:linear-gradient(135deg, var(--calc-cyan) 0%, var(--calc-purple) 100%);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;margin-bottom:8px;font-size:2rem;font-weight:800}.calc-subtitle{color:var(--calc-text-dim);max-width:600px;margin:0 auto;font-size:.92rem}.tab-control{flex-wrap:wrap;gap:8px;max-width:1040px;margin:20px auto 0;padding:0 24px;display:flex}.tab-btn{border:1px solid var(--calc-border-default);color:var(--calc-text-dim);cursor:pointer;background:0 0;border-radius:20px;padding:8px 18px;font-size:.85rem;font-weight:500;transition:transform .25s,opacity .25s,color .2s,box-shadow .25s}.tab-btn:hover{color:var(--calc-text-primary);border-color:#ffffff40}.tab-btn.active{background:var(--accent);color:#000;border-color:var(--accent);font-weight:700}.tab-panel{display:none}.tab-panel.active{display:block}.action-bar{flex-wrap:wrap;gap:8px;max-width:1040px;margin:16px auto;padding:0 24px;display:flex}.action-btn{border:1px solid var(--calc-border-default);color:var(--calc-text-primary);cursor:pointer;background:#ffffff0f;border-radius:8px;padding:8px 14px;font-size:.82rem;transition:transform .25s,opacity .25s,color .2s,box-shadow .25s}.action-btn:hover{border-color:var(--calc-cyan);background:#ffffff1f}.action-btn--reset{margin-left:auto}.calc-layout{grid-template-columns:1fr 1fr;gap:20px;max-width:1040px;margin:0 auto;padding:0 24px 32px;display:grid}.input-card,.result-card{border-radius:14px;padding:20px}.input-card{background:var(--calc-bg-card);border:1px solid var(--calc-border-default);border-left:3px solid var(--calc-cyan)}.result-card{background:var(--calc-bg-card);border:1px solid var(--calc-border-default);border-left:3px solid var(--calc-purple)}.card-header{justify-content:space-between;align-items:center;margin-bottom:16px;display:flex}.card-title{font-size:1rem;font-weight:700}.card-intro{color:var(--calc-text-dim);margin-bottom:16px;font-size:.85rem;line-height:1.6}.field-group{flex-direction:column;gap:6px;margin-bottom:14px;display:flex}.field-label{color:var(--calc-text-dim);font-size:.8rem;font-weight:600}.dim-unit{color:var(--calc-text-muted);font-size:.72rem;font-weight:400}.glass-input{background:var(--calc-bg-input);border:1px solid var(--calc-border-default);width:100%;height:40px;color:var(--calc-text-primary);font-size:.9rem;font-family:var(--calc-font-mono);border-radius:8px;outline:none;padding:6px 10px;transition:border-color .2s}.glass-input:focus{border-color:var(--calc-cyan)}.input-hint{color:var(--calc-text-dim);font-size:.78rem;line-height:1.4}.chip-row{flex-wrap:wrap;gap:6px;display:flex}.chip{border:1px solid var(--calc-border-default);color:var(--calc-text-dim);cursor:pointer;font-size:.8rem;font-family:var(--calc-font-mono);background:0 0;border-radius:14px;padding:5px 12px;transition:transform .25s,opacity .25s,color .2s,box-shadow .25s}.chip:hover{border-color:var(--calc-cyan);color:var(--calc-text-primary)}.chip.active{border-color:var(--calc-cyan);color:var(--calc-cyan);background:#22d3ee26;font-weight:700}.hero-result{text-align:center;border-bottom:1px solid var(--calc-border-default);margin-bottom:16px;padding:16px 0}.hero-label{color:var(--calc-text-dim);margin-bottom:4px;font-size:.78rem;display:block}.hero-value{font-size:3rem;font-weight:800;font-family:var(--calc-font-mono);background:linear-gradient(135deg, var(--calc-cyan), var(--calc-purple));-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text}.hero-unit{color:var(--calc-text-dim);margin-left:4px;font-size:1rem}.result-detail{color:var(--calc-text-dim);text-align:center;margin-bottom:16px;font-size:.85rem;line-height:1.5}.stat-grid{grid-template-columns:1fr 1fr 1fr;gap:8px;display:grid}.stat-cell{border:1px solid var(--calc-border-default);text-align:center;background:#ffffff0a;border-radius:8px;padding:10px 8px}.stat-label{color:var(--calc-text-dim);margin-bottom:4px;font-size:.7rem;display:block}.stat-value{font-size:1rem;font-weight:700;font-family:var(--calc-font-mono);color:var(--calc-text-primary)}.stat-value--formula{font-size:.72rem;font-weight:600}.reference-wrap{max-width:1040px;margin:0 auto;padding:0 24px 32px}.section-label{margin-bottom:12px;font-size:1rem;font-weight:700}.ref-table-wrap{margin-top:10px;overflow-x:auto}.ref-table{border-collapse:collapse;width:100%;font-size:.82rem}.ref-table th{text-align:left;color:var(--calc-text-dim);border-bottom:1px solid var(--calc-border-default);background:#ffffff0f;padding:8px 12px}.ref-table td{border-bottom:1px solid #ffffff0a;padding:7px 12px}.ref-table tr:hover td{background:#ffffff08}.formula-pills2{flex-wrap:wrap;gap:10px;margin-top:12px;display:flex}.formula-pill{background:#22d3ee12;border:1px solid #22d3ee33;border-radius:10px;flex:1;min-width:200px;padding:12px 16px}.pill-label{color:var(--calc-cyan);margin-bottom:4px;font-size:.72rem;font-weight:600;display:block}.pill-formula{font-family:var(--calc-font-mono);color:var(--calc-text-primary);margin-bottom:4px;font-size:.88rem;display:block}.pill-note{color:var(--calc-text-dim);font-size:.72rem;display:block}.toast{z-index:9999;pointer-events:none;border-radius:8px;padding:10px 16px;font-size:.85rem;animation:.3s toastIn;position:fixed;bottom:24px;right:24px}.toast-success{color:#fff;background:#10b981e6}.toast-warn{color:#000;background:#f59e0be6}.toast-error{color:#fff;background:#ef4444e6}@keyframes toastIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@media (width<=900px){.calc-layout{grid-template-columns:1fr}}@media (width<=600px){.calc-title{font-size:1.5rem}.stat-grid{grid-template-columns:1fr}.action-btn--reset{margin-left:0}}[data-theme=light] body{background:#e8edf5}[data-theme=light] .input-card{border-left-color:#0891b2}[data-theme=light] .result-card{border-left-color:#7c3aed}[data-theme=light] .calc-title{background:linear-gradient(135deg,#0891b2 0%,#7c3aed 100%);-webkit-background-clip:text;background-clip:text}[data-theme=light] .hero-value{background:linear-gradient(135deg,#0891b2,#7c3aed);-webkit-background-clip:text;background-clip:text}[data-theme=light] .tab-btn.active{color:#fff;background:#0891b2;border-color:#0891b2}[data-theme=light] .chip.active{color:#0891b2;background:#0891b21a;border-color:#0891b2}[data-theme=light] .glass-input{color:#0f172a;background:#edf2f9;border-color:#00000026}[data-theme=light] .stat-cell{background:#f0f4f9;border-color:#0000001a}[data-theme=light] .ref-table th{color:#334155;background:#f0f4f9}[data-theme=light] .ref-table tr:hover td{background:#f5f8fc}[data-theme=light] .formula-pill{background:#0891b214;border-color:#0891b233}[data-theme=light] .pill-label{color:#0891b2}[data-theme=light] .action-btn{background:#edf2f9;border-color:#0000001f}[data-theme=light] .action-btn:hover{border-color:#0891b2}@media print{.glass-navbar,.foot,.calc-back-to-top,.tab-control,.action-bar{display:none}body{color:#000;background:#fff}.result-card,.input-card{box-shadow:none;page-break-inside:avoid;color:#000;background:#fff;border:1px solid #ccc}.tab-panel{display:block}}