:root{--bg-dark-1:#2c3e50;--bg-dark-2:#34495e;--accent-color:#dc146e;--text-main:#111827;--text-secondary:#334155;--text-light:#ecf0f1;--bg-card:#f9fafb;--bg-light-card:#fff;--border-soft:var(--ls-border-normal,#e6ebf2);--shadow-soft:var(--ls-shadow-md,0 10px 24px #0f172a1a);--glass-calc-bg:linear-gradient(145deg,#ffffff21,#ffffff0d);--glass-calc-border:#fff3;--glass-calc-shadow:0 18px 40px #0f172a3d,inset 0 1px 0 #ffffff38;--glass-panel-bg:linear-gradient(145deg,#ffffff24,#ffffff0d);--glass-panel-border:#fff3;--glass-panel-shadow:0 18px 40px #0f172a3d,inset 0 1px 0 #ffffff3d;--glass-panel-filter:blur(12px)saturate(130%);--glass-chip-bg:linear-gradient(145deg,#dc146e38,#dc146e1a);--glass-chip-border:#dc146e6b;--glass-chip-filter:blur(8px)saturate(120%);--glass-float-bg:linear-gradient(145deg,#2c3e50cc,#34495ec2);--glass-float-border:#fff3;--glass-float-shadow:0 14px 28px #0f172a57,inset 0 1px 0 #ffffff2e;--glass-float-filter:blur(14px)saturate(130%);--ui-space-section:3rem;--ui-radius-panel:var(--ls-radius-lg,12px);--ui-radius-card:var(--ls-radius-md,10px);--ui-shadow-panel:var(--ls-shadow-lg,0 18px 36px #0f172a29);--ui-focus-ring:0 0 0 3px #dc146e3d;--btn-hover:#b8104a;--btn-shadow:var(--ls-shadow-accent,0 4px 14px #dc146e66);--acc-high:#10b981;--acc-good:#3b82f6;--acc-norm:#f59e0b;--acc-poor:#fbbf24}.mb-48{margin-bottom:48px!important}.mb-24-gap{margin-bottom:24px!important}.ui-section{margin-bottom:var(--ui-space-section)}.ui-panel{border-radius:var(--ui-radius-panel);box-shadow:var(--ui-shadow-panel)}.ui-card{border-radius:var(--ui-radius-card)}.ui-action{transition:transform .24s cubic-bezier(.2,.7,.2,1),box-shadow .24s cubic-bezier(.2,.7,.2,1),background-color .2s,border-color .2s,color .2s}.ui-action:focus-visible,.ui-focus:focus-visible{box-shadow:var(--ui-focus-ring);outline:none}.glass-panel-calc{background:var(--glass-calc-bg);border:1px solid 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auto;padding-top:2rem;padding-bottom:2rem}.card-custom{border:1px solid var(--border-soft);border-radius:var(--ls-radius-lg,12px);box-shadow:var(--ls-shadow-md,0 12px 28px #0f172a1c);margin-bottom:var(--ui-space-section);background:var(--bg-card);color:var(--text-main);padding:2rem;transition:box-shadow .28s,transform .28s}.card-custom:hover{box-shadow:var(--ls-shadow-lg,0 18px 36px #0f172a24);transform:translateY(-2px)}#important-block{border-left:4px solid var(--accent-color);background:linear-gradient(135deg,#dc146e1a,#f8fafc)}.concept-card{background:var(--bg-light-card);border-radius:var(--ls-radius-md,10px);box-shadow:var(--ls-shadow-sm,0 8px 18px #0f172a14);border:1px solid var(--border-soft);min-height:100px;color:var(--text-main);align-items:flex-start;margin-bottom:24px;padding:24px;transition:transform .3s;display:flex}.concept-card:hover{transform:translateY(-2px)}.concept-icon{color:var(--accent-color);text-align:center;flex-shrink:0;justify-content:center;width:40px;margin-right:20px;font-size:32px;display:flex}.concept-title{color:var(--accent-color);font-size:1.4rem;font-weight:600;margin-bottom:.25rem!important}.concept-text{color:var(--text-secondary);font-size:1.05rem}.form-control-custom,.form-select-custom{border-radius:var(--ls-radius-sm,8px);width:100%;height:52px;color:var(--text-main);background:#fff;border:1px solid #cbd5e1;padding:11px 15px;font-family:inherit;transition:border-color .2s,box-shadow .2s}.form-control-custom:focus{border-color:var(--accent-color);background:#fff;outline:none;box-shadow:0 0 0 3px #dc146e29}.form-control-custom::placeholder{color:#94a3b8}.calculate-btn{border-radius:var(--ls-radius-sm,8px);box-shadow:var(--ls-shadow-accent,0 8px 20px #dc146e52);cursor:pointer;border:none;margin-top:1rem;padding:14px 28px;font-size:1.2rem;font-weight:700;transition:transform .2s,box-shadow .2s,background-color .2s;display:block;background-color:var(--accent-color)!important;color:#fff!important}.calculate-btn:hover{transform:translateY(-2px);box-shadow:0 12px 24px #dc146e66;background-color:var(--btn-hover)!important}.calculate-btn:focus-visible{box-shadow:var(--ui-focus-ring);outline:none}.copy-btn{border-radius:var(--ls-radius-sm,8px);cursor:pointer;border:none;max-width:280px;margin:20px auto 0;padding:12px 24px;font-weight:600;transition:all .2s;display:block;background-color:var(--accent-color)!important;color:#fff!important}.formula-code{border-radius:var(--ls-radius-sm,8px);color:var(--text-main);border:1px solid var(--border-soft);background-color:#f1f5f9;padding:1rem;font-family:Consolas,Courier New,monospace;line-height:1.5;display:block;overflow-x:auto}.report-box{background:var(--bg-card);border-radius:var(--ls-radius-md,10px);border:1px solid var(--border-soft);box-shadow:var(--shadow-soft)}#report-text.whitespace-pre-wrap{white-space:pre-wrap;word-break:break-word;color:var(--text-secondary);padding:1.5rem;font-size:1.05rem;line-height:1.6}#sidebar{z-index:1030;border-right:2px solid var(--accent-color);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);background-color:#34495ef2;width:220px;height:100%;padding-top:50px;transition:transform .3s ease-in-out;position:fixed;top:0;left:0}.sidebar-nav{margin:0;padding:0;list-style:none}.sidebar-nav li button{color:var(--text-light);text-align:left;cursor:pointer;background:0 0;border:none;width:100%;padding:12px 20px;font-family:inherit;font-size:14px;transition:all .3s}.sidebar-nav li button:hover,.sidebar-nav li button.active{color:var(--accent-color);border-left:4px solid var(--accent-color);background-color:#ecf0f114;padding-left:16px;font-weight:700}#menu-toggle{z-index:1040;background-color:var(--accent-color);color:#fff;width:45px;height:45px;box-shadow:var(--btn-shadow);cursor:pointer;border:none;border-radius:50%;justify-content:center;align-items:center;display:flex;position:fixed;top:20px;left:20px}#back-to-top{background-color:var(--accent-color);color:#fff;width:56px;height:56px;box-shadow:var(--ls-shadow-accent,0 4px 12px #dc146e66);z-index:999;cursor:pointer;border:none;border-radius:50%;justify-content:center;align-items:center;font-size:1.5rem;transition:opacity .3s,transform .3s;display:flex;position:fixed;bottom:32px;right:32px}#back-to-top:hover{transform:scale(1.1)}@media (min-width:992px){#sidebar{transform:translate(0)}#menu-toggle{display:none}}@media (max-width:991px){#sidebar{border-right:none;transform:translate(-100%)}#main-content{margin-left:0;padding:0 20px}#menu-toggle{display:flex}}h2.section-title{text-shadow:none;margin-top:0;margin-bottom:1.5rem;font-size:1.75rem;font-weight:600;color:var(--text-main)!important}.card-custom h2,.card-custom h3{color:var(--text-main);font-weight:600}.result-card{border:1px solid var(--border-soft);border-radius:var(--ls-radius-lg,12px);box-shadow:var(--shadow-soft);background:var(--bg-card);color:var(--text-main);margin-bottom:24px;padding:26px;transition:box-shadow .25s,transform .25s}@media (max-width:768px){:root{--ui-space-section:2.45rem}.card-custom{margin-bottom:var(--ui-space-section);padding:1.35rem}.concept-card{margin-bottom:16px;padding:18px}.result-card{padding:20px}}@media (max-width:390px){:root{--ui-space-section:2.1rem}.hero-section-shell{padding-top:.2rem}.hero-top-strip{gap:.5rem;margin-bottom:.7rem}.hero-top-strip .glass-chip,.hero-top-strip a{letter-spacing:.03em;padding:.38rem .62rem;font-size:10px}.hero-main-panel{border-radius:1.35rem;padding:1rem .9rem 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