:root{--bg-dark:#050510;--bg-card:#0d0d1f;--bg-card-elevated:#14142a;--bg-input:#0a0a1e;--input-bg:#0a0a1e;--card:#0d0d1ff2;--text-main:#fff;--text-dim:#88a;--text-muted:#666;--border:#ffffff12;--border-active:#ffffff2e;--cyan:#00f3ff;--purple:#bc13fe;--accent:#00f3ff;--cyan-dim:#00f3ff1f;--cyan-glow:#00f3ff40;--purple-dim:#bc13fe1f;--font-body:"Inter", -apple-system, BlinkMacSystemFont, sans-serif;--font-mono:"JetBrains Mono", "Fira Code", monospace;--font-heading:"Plus Jakarta Sans", var(--font-body)}*,:before,:after{box-sizing:border-box}body{font-family:var(--font-body);background:var(--bg-dark);color:var(--text-main);-webkit-font-smoothing:antialiased;margin:0;padding:0;line-height:1.5}.hidden{display:none!important}.glass-navbar{z-index:1000;-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--border);background:#050510eb;padding:0 24px;position:sticky;top:0}.nav-link.active{color:var(--cyan)!important}.main-container{max-width:1200px;margin:0 auto;padding:40px 24px}.page-title{font-family:var(--font-heading);color:var(--text-main);text-align:center;margin:0 0 8px;font-size:2rem;font-weight:700}.section-desc{color:var(--text-dim);text-align:center;margin:0 0 32px;font-size:1rem}.text-center{text-align:center}.outer-tabs{background:#ffffff08;border-radius:12px;gap:4px;margin-bottom:24px;padding:4px;display:flex}.tab-btn{color:var(--text-dim);font-family:var(--font-body);cursor:pointer;background:0 0;border:none;border-radius:8px;flex:1;padding:10px 16px;font-size:.85rem;font-weight:600;transition:all .2s}.tab-btn:hover{color:var(--text-main);background:#ffffff0a}.tab-btn.active{color:var(--cyan);background:#00f3ff1f;box-shadow:0 0 12px #00f3ff26}.tab-panel{display:none}.tab-panel.active{display:block}.calculator-wrapper{grid-template-columns:340px 1fr;align-items:start;gap:24px;display:grid}.card{background:var(--bg-card);border:1px solid var(--border);border-radius:16px;padding:24px}.input-card{border-left:3px solid var(--cyan);position:sticky;top:90px}.result-card{border-left:3px solid var(--purple)}.card-header{font-family:var(--font-mono);letter-spacing:1.5px;text-transform:uppercase;color:var(--text-muted);margin-bottom:20px;font-size:.7rem;font-weight:600}.input-group{margin-bottom:18px}.input-label{color:var(--text-dim);margin-bottom:6px;font-size:.8rem;font-weight:600;display:block}.optional-tag{color:var(--text-muted);font-size:.7rem;font-style:italic;font-weight:400}.glass-input,.glass-select{background:var(--input-bg);border:1px solid var(--border);width:100%;color:var(--text-main);font-family:var(--font-body);border-radius:8px;outline:none;padding:10px 14px;font-size:.9rem;transition:border-color .2s}.glass-input:focus,.glass-select:focus{border-color:var(--cyan);box-shadow:0 0 0 2px #00f3ff26}.glass-select option{background:var(--bg-card);color:var(--text-main)}.glass-input::placeholder{color:#ffffff4d}.unit-row{align-items:center;gap:8px;display:flex}.unit-row .glass-input{flex:1}.unit-toggle{gap:2px;display:flex}.unit-btn{border:1px solid var(--border);color:var(--text-dim);cursor:pointer;background:#ffffff0a;border-radius:6px;padding:8px 12px;font-size:.75rem;font-weight:600;transition:all .2s}.unit-btn.active{color:var(--cyan);background:#00f3ff1f;border-color:#00f3ff4d}.unit-label{font-family:var(--font-mono);color:var(--text-dim);white-space:nowrap;font-size:.75rem}.chip-row{flex-wrap:wrap;gap:6px;display:flex}.chip-btn{border:1px solid var(--border);color:var(--text-dim);cursor:pointer;background:#ffffff0a;border-radius:20px;padding:6px 14px;font-size:.78rem;font-weight:600;transition:all .2s}.chip-btn:hover{border-color:var(--cyan);color:var(--text-main)}.chip-btn.active{color:var(--cyan);background:#00f3ff1f;border-color:#00f3ff4d}.glass-range{-webkit-appearance:none;appearance:none;background:#ffffff14;border-radius:3px;outline:none;width:100%;height:6px;margin:10px 0}.glass-range::-webkit-slider-thumb{-webkit-appearance:none;background:var(--cyan);border:2px solid var(--bg-dark);cursor:pointer;border-radius:50%;width:18px;height:18px;box-shadow:0 0 8px #00f3ff66}.glass-range::-moz-range-thumb{background:var(--cyan);border:2px solid var(--bg-dark);cursor:pointer;border-radius:50%;width:18px;height:18px}.range-labels{color:var(--text-muted);font-size:.7rem;font-family:var(--font-mono);justify-content:space-between;display:flex}.result-header{justify-content:space-between;align-items:center;margin-bottom:8px;display:flex}.action-btns{gap:6px;display:flex}.action-btn{border:1px solid var(--border);width:32px;height:32px;color:var(--text-dim);cursor:pointer;background:#ffffff0a;border-radius:8px;justify-content:center;align-items:center;transition:all .2s;display:flex}.action-btn:hover{color:var(--cyan);background:#00f3ff1a;border-color:#00f3ff4d}.hero-stat{text-align:center;background:#00f3ff0f;border:1px solid #00f3ff1f;border-radius:12px;margin-bottom:20px;padding:24px 16px}.hero-label{font-size:.7rem;font-family:var(--font-mono);letter-spacing:1px;text-transform:uppercase;color:var(--text-dim);margin-bottom:6px;display:block}.hero-value{color:var(--cyan);font-size:2.2rem;font-weight:700;font-family:var(--font-heading);line-height:1.1;display:block}.hero-sub{color:var(--text-dim);font-size:.85rem;font-family:var(--font-mono);margin-top:4px;display:block}.stat-grid{grid-template-columns:1fr 1fr;gap:12px;margin-bottom:24px;display:grid}.stat-cell{border:1px solid var(--border);background:#ffffff08;border-radius:10px;flex-direction:column;padding:14px;display:flex}.stat-label{font-size:.68rem;font-family:var(--font-mono);letter-spacing:.5px;text-transform:uppercase;color:var(--text-muted);margin-bottom:6px}.stat-value{color:var(--text-main);font-size:1.3rem;font-weight:700}.stat-sub{color:var(--text-dim);font-size:.75rem;font-family:var(--font-mono);margin-top:2px}.electrolyte-section{border-top:1px solid var(--border);margin-bottom:24px;padding-top:16px}.electrolyte-grid{grid-template-columns:1fr 1fr;gap:12px;display:grid}.elec-card{text-align:center;border-radius:10px;flex-direction:column;align-items:center;gap:4px;padding:16px;display:flex}.elec-card.sodium{background:#ffa50014;border:1px solid #ffa50033}.elec-card.sodium svg{color:orange}.elec-card.potassium{background:#8a2be214;border:1px solid #8a2be233}.elec-card.potassium svg{color:#8a2be2}.elec-label{font-size:.7rem;font-family:var(--font-mono);letter-spacing:.8px;text-transform:uppercase;color:var(--text-dim)}.elec-value{color:var(--text-main);font-size:1.6rem;font-weight:700}.elec-unit{color:var(--text-muted);font-size:.7rem;font-family:var(--font-mono)}.sweat-estimate{border-top:1px solid var(--border);padding-top:16px}.sweat-bar-wrap{padding:8px 0}.sweat-bar{background:linear-gradient(90deg,#3b82f6,#22c55e,#eab308,#ef4444);border-radius:6px;height:12px;position:relative;overflow:visible}.sweat-fill{border-radius:6px;height:100%;transition:width .4s}.sweat-marker{background:var(--text-main);border-radius:2px;width:4px;height:20px;transition:left .4s;position:absolute;top:-4px;box-shadow:0 0 6px #ffffff80}.sweat-labels{color:var(--text-muted);font-size:.7rem;font-family:var(--font-mono);justify-content:space-between;margin-top:6px;display:flex}.schedule-container{max-width:700px;margin:0 auto}.tab-section-title{font-family:var(--font-heading);color:var(--text-main);margin:0 0 8px;font-size:1.3rem;font-weight:700}.tab-section-desc{color:var(--text-dim);margin:0 0 24px;font-size:.9rem}.timeline{margin-bottom:32px;padding-left:40px;position:relative}.timeline:before{content:"";background:linear-gradient(180deg, var(--cyan), var(--purple));border-radius:1px;width:2px;position:absolute;top:0;bottom:0;left:15px}.tl-item{background:var(--bg-card);border:1px solid var(--border);border-radius:12px;margin-bottom:20px;padding:16px 18px;transition:border-color .2s;position:relative}.tl-item:hover{border-color:#00f3ff40}.tl-item:before{content:"";background:var(--cyan);border:2px solid var(--bg-dark);border-radius:50%;width:12px;height:12px;position:absolute;top:18px;left:-33px;box-shadow:0 0 8px #00f3ff66}.tl-item.post:before{background:var(--purple);box-shadow:0 0 8px #bc13fe66}.tl-time{font-family:var(--font-mono);color:var(--cyan);text-transform:uppercase;letter-spacing:1px;margin-bottom:4px;font-size:.7rem}.tl-item.post .tl-time{color:var(--purple)}.tl-amount{color:var(--text-main);margin-bottom:2px;font-size:1.2rem;font-weight:700}.tl-note{color:var(--text-dim);font-size:.8rem}.schedule-summary{margin-top:8px}.summary-grid{grid-template-columns:1fr 1fr;gap:12px;display:grid}.summary-item{border:1px solid var(--border);text-align:center;background:#ffffff08;border-radius:8px;padding:12px}.summary-label{font-size:.68rem;font-family:var(--font-mono);text-transform:uppercase;letter-spacing:.5px;color:var(--text-muted);margin-bottom:4px;display:block}.summary-value{color:var(--cyan);font-size:1.1rem;font-weight:700}.tips-container{max-width:800px;margin:0 auto}.tips-section{margin-bottom:36px}.tips-grid{grid-template-columns:1fr 1fr;gap:12px;display:grid}.tip-card{background:var(--bg-card);border:1px solid var(--border);border-radius:10px;padding:16px}.tip-card h4{color:var(--cyan);margin:0 0 6px;font-size:.85rem;font-weight:700}.tip-card p{color:var(--text-dim);margin:0;font-size:.82rem;line-height:1.6}.checklist{flex-direction:column;gap:8px;display:flex}.check-item{color:var(--text-dim);border:1px solid var(--border);background:#ffffff05;border-radius:8px;align-items:center;gap:10px;padding:10px 14px;font-size:.84rem;display:flex}.check-dot{border-radius:50%;flex-shrink:0;width:10px;height:10px}.check-level{font-size:.72rem;font-weight:700;font-family:var(--font-mono);text-transform:uppercase;letter-spacing:.5px;margin-right:4px}.check-item.mild .check-dot{background:#eab308}.check-item.mild .check-level{color:#eab308}.check-item.moderate .check-dot{background:#f97316}.check-item.moderate .check-level{color:#f97316}.check-item.severe .check-dot{background:#ef4444}.check-item.severe .check-level{color:#ef4444}.elec-guide-grid{grid-template-columns:1fr 1fr;gap:12px;display:grid}.elec-guide-card{background:var(--bg-card);border:1px solid var(--border);border-radius:10px;padding:18px}.elec-guide-card h3{color:var(--cyan);font-size:.9rem;font-weight:700;font-family:var(--font-heading);margin:0 0 8px}.elec-guide-card p{color:var(--text-dim);margin:0;font-size:.82rem;line-height:1.6}.temp-guide{flex-direction:column;gap:8px;display:flex}.temp-row{border:1px solid var(--border);background:#ffffff05;border-radius:8px;grid-template-columns:140px 80px 1fr;align-items:center;gap:12px;padding:12px 16px;display:grid}.temp-range{font-family:var(--font-mono);color:var(--text-main);font-size:.78rem;font-weight:600}.temp-adj{font-family:var(--font-mono);text-align:center;font-size:.8rem;font-weight:700}.temp-note{color:var(--text-dim);font-size:.8rem}.temp-row.cool .temp-adj{color:#3b82f6}.temp-row.mild .temp-adj{color:#22c55e}.temp-row.warm .temp-adj{color:#eab308}.temp-row.hot .temp-adj{color:#ef4444}.page-sections-outer{max-width:1200px;margin:0 auto;padding:0 1.5rem 3rem}.how-section{margin-bottom:48px}.how-title,.faq-title,.related-title{font-family:var(--font-heading);color:var(--text-main);text-align:center;margin:0 0 24px;font-size:1.4rem;font-weight:700}.how-steps{grid-template-columns:1fr 1fr;gap:16px;display:grid}.how-step{background:var(--bg-card);border:1px solid var(--border);border-radius:12px;padding:20px}.step-num{width:32px;height:32px;color:var(--cyan);background:#00f3ff1f;border-radius:50%;justify-content:center;align-items:center;margin-bottom:10px;font-size:.85rem;font-weight:700;display:inline-flex}.how-step h3{color:var(--text-main);margin:0 0 6px;font-size:.95rem;font-weight:700}.how-step p{color:var(--text-dim);margin:0;font-size:.82rem;line-height:1.6}.faq-section{margin-bottom:48px}.faq-list{flex-direction:column;display:flex}.faq-item{border-bottom:1px solid #ffffff0f}.faq-item__question{cursor:pointer;color:var(--text-main);user-select:none;justify-content:space-between;align-items:center;padding:14px 4px;font-size:.9rem;font-weight:600;list-style:none;transition:color .2s;display:flex}.faq-item__question::-webkit-details-marker{display:none}.faq-item__question:after{content:"+";font-family:var(--font-mono);color:var(--text-dim);flex-shrink:0;margin-left:16px;font-size:1.1rem;transition:color .2s}.faq-item[open] .faq-item__question:after{content:"−";color:var(--cyan)}.faq-item__question:hover{color:var(--cyan)}.faq-item__answer{color:var(--text-dim);padding:0 4px 14px;font-size:.85rem;line-height:1.75}.calc-related{margin-bottom:24px}.related-grid{grid-template-columns:repeat(4,1fr);gap:12px;display:grid}.related-card{background:var(--bg-card);border:1px solid var(--border);text-align:center;border-radius:12px;flex-direction:column;align-items:center;gap:6px;padding:20px 12px;text-decoration:none;transition:all .2s;display:flex}.related-card:hover{border-color:#00f3ff4d;transform:translateY(-2px);box-shadow:0 4px 16px #00f3ff1a}.related-icon{font-size:1.6rem}.related-name{color:var(--text-main);font-size:.85rem;font-weight:700}.related-desc{color:var(--text-dim);font-size:.72rem;line-height:1.4}.toast{color:#fff;z-index:9999;border-radius:10px;max-width:340px;padding:12px 20px;font-size:.85rem;animation:.3s toastIn;position:fixed;bottom:24px;right:24px;box-shadow:0 4px 20px #0006}.toast-success{background:#00c896f2}.toast-warn{background:#c89600f2}.toast-error{background:#c83232f2}@keyframes toastIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@media (width<=900px){.calculator-wrapper{grid-template-columns:1fr}.input-card{position:static}.stat-grid{grid-template-columns:1fr 1fr}.how-steps{grid-template-columns:1fr}.related-grid{grid-template-columns:1fr 1fr}.tips-grid,.elec-guide-grid{grid-template-columns:1fr}}@media (width<=600px){.main-container{padding:24px 16px}.page-title{font-size:1.5rem}.stat-grid,.electrolyte-grid,.summary-grid,.related-grid{grid-template-columns:1fr}.temp-row{grid-template-columns:1fr;gap:4px}.temp-adj{text-align:left}.hero-value{font-size:1.7rem}}[data-theme=light]{--bg-dark:#e8edf5;--bg-card:#fff;--bg-card-elevated:#fff;--bg-input:#f0f4f9;--input-bg:#f0f4f9;--card:#fffffff2;--text-main:#0f172a;--text-dim:#475569;--text-muted:#64748b;--border:#0000001f;--border-active:#00000040;--cyan:#0e7490;--purple:#7c3aed;--accent:#0e7490;--cyan-dim:#0e74901a;--cyan-glow:#0e749026;--purple-dim:#7c3aed1a}[data-theme=light] body{color:#0f172a;background:#e8edf5}[data-theme=light] .glass-navbar{backdrop-filter:blur(12px);background:#fffffff2;border-bottom:1px solid #0000001a}[data-theme=light] .nav-link.active{color:#0e7490!important}[data-theme=light] .card{background:#fff;border:1px solid #0000001f;box-shadow:0 2px 12px #00000014}[data-theme=light] .input-card{border-left:3px solid #0e7490}[data-theme=light] .result-card{border-left:3px solid #7c3aed}[data-theme=light] .glass-input,[data-theme=light] .glass-select{color:#0f172a;background:#f0f4f9;border-color:#0000001f}[data-theme=light] .glass-input:focus,[data-theme=light] .glass-select:focus{border-color:#0e7490;box-shadow:0 0 0 2px #0e749026}[data-theme=light] .glass-select option{color:#0f172a;background:#fff}[data-theme=light] .glass-input::placeholder{color:#00000059}[data-theme=light] .outer-tabs{background:#f0f4f9}[data-theme=light] .tab-btn{color:#64748b}[data-theme=light] .tab-btn:hover{color:#0f172a;background:#0000000a}[data-theme=light] .tab-btn.active{color:#fff;background:#0e7490;box-shadow:0 2px 8px #0e749033}[data-theme=light] .unit-btn{color:#64748b;background:#f0f4f9;border-color:#0000001f}[data-theme=light] .unit-btn.active{color:#0e7490;background:#0e74901f;border-color:#0e74904d}[data-theme=light] .chip-btn{color:#64748b;background:#f0f4f9;border-color:#0000001f}[data-theme=light] .chip-btn:hover{color:#0f172a;border-color:#0e7490}[data-theme=light] .chip-btn.active{color:#0e7490;background:#0e74901f;border-color:#0e74904d}[data-theme=light] .glass-range{background:#0000001a}[data-theme=light] .glass-range::-webkit-slider-thumb{background:#0e7490;border-color:#fff;box-shadow:0 0 6px #0e74904d}[data-theme=light] .glass-range::-moz-range-thumb{background:#0e7490;border-color:#fff}[data-theme=light] .hero-stat{background:#eff9fb;border-color:#0e749033}[data-theme=light] .hero-value{color:#0e7490}[data-theme=light] .stat-cell{background:#edf2f9;border-color:#0000001a}[data-theme=light] .stat-value{color:#0f172a}[data-theme=light] .elec-card.sodium{background:#fff7ed;border-color:#ffa50040}[data-theme=light] .elec-card.potassium{background:#faf5ff;border-color:#8a2be233}[data-theme=light] .elec-value{color:#0f172a}[data-theme=light] .sweat-marker{background:#0f172a;box-shadow:0 0 6px #0000004d}[data-theme=light] .action-btn{color:#64748b;background:#f0f4f9;border-color:#0000001f}[data-theme=light] .action-btn:hover{color:#0e7490;background:#0e74901a;border-color:#0e74904d}[data-theme=light] .timeline:before{background:linear-gradient(#0e7490,#7c3aed)}[data-theme=light] .tl-item{background:#fff;border-color:#0000001f;box-shadow:0 1px 4px #0000000f}[data-theme=light] .tl-item:hover{border-color:#0e74904d}[data-theme=light] .tl-item:before{background:#0e7490;border-color:#e8edf5;box-shadow:0 0 6px #0e74904d}[data-theme=light] .tl-item.post:before{background:#7c3aed;box-shadow:0 0 6px #7c3aed4d}[data-theme=light] .tl-time{color:#0e7490}[data-theme=light] .tl-item.post .tl-time{color:#7c3aed}[data-theme=light] .tl-amount{color:#0f172a}[data-theme=light] .summary-item{background:#edf2f9;border-color:#0000001a}[data-theme=light] .summary-value{color:#0e7490}[data-theme=light] .tip-card{background:#fff;border-color:#0000001a;box-shadow:0 1px 4px #0000000f}[data-theme=light] .tip-card h4{color:#0e7490}[data-theme=light] .tip-card p{color:#475569}[data-theme=light] .check-item{color:#475569;background:#fafbfc;border-color:#00000014}[data-theme=light] .elec-guide-card{background:#fff;border-color:#0000001a;box-shadow:0 1px 4px #0000000f}[data-theme=light] .elec-guide-card h3{color:#0e7490}[data-theme=light] .elec-guide-card p{color:#475569}[data-theme=light] .temp-row{background:#fafbfc;border-color:#00000014}[data-theme=light] .temp-range{color:#0f172a}[data-theme=light] .temp-note{color:#475569}[data-theme=light] .how-step{background:#fff;border-color:#0000001a;box-shadow:0 1px 4px #0000000f}[data-theme=light] .step-num{color:#0e7490;background:#0e74901f}[data-theme=light] .how-step h3{color:#0f172a}[data-theme=light] .how-step p{color:#475569}[data-theme=light] .faq-list{gap:8px}[data-theme=light] .faq-item{background:#fff;border:1px solid #0000001a;border-radius:10px;transition:box-shadow .2s,border-color .2s;overflow:hidden;box-shadow:0 1px 4px #0000000f}[data-theme=light] .faq-item:hover{border-color:#0e749059;box-shadow:0 2px 10px #0e749014}[data-theme=light] .faq-item[open]{border-color:#0e749066 #0e749066 #0e749066 #0e7490;border-left-style:solid;border-left-width:3px;box-shadow:0 2px 12px #0e74901a}[data-theme=light] .faq-item__question{color:#0f172a;padding:14px 16px}[data-theme=light] .faq-item__question:after{color:#64748b}[data-theme=light] .faq-item[open] .faq-item__question:after,[data-theme=light] .faq-item__question:hover{color:#0e7490}[data-theme=light] .faq-item__answer{color:#475569;border-top:1px solid #0000000f;padding:12px 16px 16px}[data-theme=light] .related-card{background:#fff;border-color:#0000001a;box-shadow:0 1px 4px #0000000f}[data-theme=light] .related-card:hover{border-color:#0e74904d;box-shadow:0 4px 16px #0e74901a}[data-theme=light] .related-name{color:#0f172a}[data-theme=light] .related-desc{color:#64748b}[data-theme=light] .toast{color:#fff}