:root{--bg-primary: #D4E6F7;--bg-secondary: #c4d9ed;--bg-tertiary: #b8d0e8;--bg-card: #ffffff;--accent-primary: #3a7ebf;--accent-primary-dark: #2c6299;--accent-primary-light: #4a9ed9;--accent-secondary: #cc7000;--accent-success: #2d8a39;--accent-warning: #b58900;--accent-danger: #c9302c;--text-primary: #202122;--text-secondary: #54595d;--text-muted: #72777d;--text-link: #3366cc;--text-link-hover: #447ff5;--border-color: #a8c8e0;--border-hover: #3a7ebf;--infobox-bg: #f8f9fa;--infobox-header-bg: #3a7ebf;--infobox-border: #a2a9b1;--input-bg: #ffffff;--input-border: #a8c8e0;--space-xs: .25rem;--space-sm: .5rem;--space-md: 1rem;--space-lg: 1.5rem;--space-xl: 2rem;--space-2xl: 3rem;--font-sans: "Inter", system-ui, -apple-system, sans-serif;--font-heading: "Outfit", "Inter", system-ui, sans-serif;--font-mono: "JetBrains Mono", "Fira Code", monospace;--text-xs: .75rem;--text-sm: .875rem;--text-base: 1rem;--text-lg: 1.125rem;--text-xl: 1.25rem;--text-2xl: 1.5rem;--text-3xl: 2rem;--radius-sm: 4px;--radius-md: 8px;--radius-lg: 12px;--radius-xl: 16px;--radius-full: 9999px;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .1);--shadow-md: 0 2px 8px rgba(0, 0, 0, .12);--shadow-lg: 0 4px 16px rgba(0, 0, 0, .15);--shadow-glow: 0 0 20px rgba(58, 126, 191, .3);--transition-fast: .15s ease;--transition-normal: .25s ease;--transition-slow: .35s ease;--header-height: 80px;--right-sidebar-width: 320px;--content-max-width: 1200px;--texture-opacity: 1;--visualizer-bg-gradient: linear-gradient(180deg, #e8f4fc 0%, #d4e6f7 100%)}[data-theme=dark]{--bg-primary: #0a1929;--bg-secondary: #0d2137;--bg-tertiary: #132f4c;--bg-card: #132f4c;--accent-primary: #00d4ff;--accent-primary-dark: #00a8cc;--accent-primary-light: #4de8ff;--accent-secondary: #ff9800;--accent-success: #4caf50;--accent-warning: #ff9800;--accent-danger: #f44336;--text-primary: #e0e0e0;--text-secondary: #b0b0b0;--text-muted: #808080;--text-link: #00d4ff;--text-link-hover: #4de8ff;--border-color: #1e4976;--border-hover: #00d4ff;--infobox-bg: #0d2137;--infobox-header-bg: #00d4ff;--infobox-border: #1e4976;--input-bg: #0d2137;--input-border: #1e4976;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .3);--shadow-md: 0 2px 8px rgba(0, 0, 0, .4);--shadow-lg: 0 4px 16px rgba(0, 0, 0, .5);--shadow-glow: 0 0 20px rgba(0, 212, 255, .3);--texture-opacity: .15;--bg-pattern: radial-gradient(rgba(255, 255, 255, .1) 1px, transparent 1px);--visualizer-bg-gradient: linear-gradient(180deg, #132f4c 0%, #0a1929 100%)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;scroll-behavior:smooth;overflow-x:hidden}body{font-family:var(--font-sans);background-color:var(--bg-primary);background-image:url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");background-blend-mode:soft-light;background-size:200px 200px;color:var(--text-primary);line-height:1.6;min-height:100dvh;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;transition:background-color var(--transition-normal),color var(--transition-normal);overflow-x:hidden}body:before{content:"";position:fixed;top:0;left:0;width:100%;height:100%;pointer-events:none;z-index:-1;opacity:var(--texture-opacity, 1);background-image:var(--bg-pattern, repeating-linear-gradient(0deg, transparent, transparent 2px, rgba(0, 0, 0, .03) 2px, rgba(0, 0, 0, .03) 3px), repeating-linear-gradient(90deg, transparent, transparent 2px, rgba(0, 0, 0, .02) 2px, rgba(0, 0, 0, .02) 3px));background-size:var(--bg-size, auto)}[data-theme=dark] body:before{--bg-size: 20px 20px}#root{min-height:100dvh;display:flex;flex-direction:column}h1,h2,h3,h4,h5,h6{font-family:var(--font-heading);font-weight:700;line-height:1.3;color:var(--text-primary);letter-spacing:-.5px}h1{font-size:var(--text-3xl)}h2{font-size:var(--text-2xl)}h3{font-size:var(--text-xl)}h4{font-size:var(--text-lg)}a{color:var(--accent-primary);text-decoration:none;transition:color var(--transition-fast)}a:hover{color:var(--accent-secondary)}input,select,textarea{font-family:inherit;font-size:var(--text-base);background:var(--input-bg);border:1px solid var(--input-border);border-radius:var(--radius-md);color:var(--text-primary);padding:var(--space-sm) var(--space-md);transition:all var(--transition-fast);width:100%}input:focus,select:focus,textarea:focus{outline:none;border-color:var(--accent-primary);box-shadow:0 0 0 3px #3a7ebf33}input::placeholder{color:var(--text-muted)}input[type=number]{font-family:var(--font-mono)}button{font-family:inherit;font-size:var(--text-sm);font-weight:600;cursor:pointer;border:none;border-radius:2px;padding:8px 16px;transition:background-color .1s ease,border-color .1s ease;text-transform:none;letter-spacing:0}.btn-primary{background:#36c;color:#fff;border:1px solid #3366cc}.btn-primary:hover{background:#447ff5;border-color:#447ff5}.btn-primary:active{background:#2a4b8d;border-color:#2a4b8d}.btn-secondary{background:#f8f9fa;color:#202122;border:1px solid #a2a9b1}.btn-secondary:hover{background:#fff;border-color:#72777d;color:#000}.btn-secondary:active{background:#c8ccd1;border-color:#72777d}.card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);padding:var(--space-lg);transition:all var(--transition-normal)}.card:hover{border-color:var(--border-hover);box-shadow:var(--shadow-md)}.app-layout{display:flex;flex-direction:column;min-height:100dvh}.main-wrapper{display:flex;flex:1;margin-top:var(--header-height);min-height:calc(100dvh - var(--header-height))}.main-content{flex:1 1 auto;width:100%;padding:clamp(.875rem,1.8vw,2rem);min-height:calc(100dvh - var(--header-height));max-width:100%}.main-wrapper.with-sidebar .main-content{max-width:calc(100% - var(--right-sidebar-width))}.main-wrapper.full-width .main-content{max-width:100%}.right-sidebar{width:var(--right-sidebar-width);background:var(--bg-secondary);border-left:1px solid var(--border-color);padding:var(--space-lg);position:fixed;top:var(--header-height);right:0;height:calc(100dvh - var(--header-height));overflow-y:auto}.calculator-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(350px,1fr));gap:var(--space-lg)}.calculator-card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-xl);padding:var(--space-xl);transition:all var(--transition-normal);box-shadow:var(--shadow-sm)}.calculator-card:hover{transform:translateY(-4px);border-color:var(--accent-primary);box-shadow:var(--shadow-md)}.calculator-card h3{display:flex;align-items:center;gap:var(--space-sm);margin-bottom:var(--space-lg);color:var(--accent-primary)}.input-group{margin-bottom:var(--space-md)}.input-group label{display:block;font-size:var(--text-sm);color:var(--text-secondary);margin-bottom:var(--space-xs)}.input-with-unit{display:flex;gap:var(--space-sm)}.input-with-unit input{flex:1}.input-with-unit select{width:auto;min-width:80px}.result-display{background:linear-gradient(135deg,#3a7ebf14,#3a7ebf0a);border:1px solid var(--accent-primary);border-radius:var(--radius-lg);padding:var(--space-lg);margin-top:var(--space-lg);text-align:center}.result-display .label{font-size:var(--text-sm);color:var(--text-secondary);margin-bottom:var(--space-xs)}.result-display .value{font-family:var(--font-mono);font-size:var(--text-2xl);font-weight:700;color:var(--accent-success);word-break:break-all}.result-display .unit{font-size:var(--text-sm);color:var(--text-secondary);margin-left:var(--space-xs)}.formula-display{background:var(--infobox-bg);border:1px solid var(--border-color);border-radius:var(--radius-md);padding:var(--space-md);margin-top:var(--space-md);font-family:var(--font-mono);font-size:var(--text-sm);color:var(--text-secondary);overflow-x:auto}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:#e9ecef}::-webkit-scrollbar-thumb{background:#adb5bd;border-radius:var(--radius-full)}::-webkit-scrollbar-thumb:hover{background:#6c757d}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@keyframes pulse{0%,to{opacity:1}50%{opacity:.7}}.fade-in{animation:fadeIn var(--transition-normal) ease-out}@media(max-width:1024px){:root{--header-height: 72px}.main-wrapper.with-sidebar .main-content{max-width:100%}.main-content{max-width:100%;padding:var(--space-lg);min-height:auto}.right-sidebar{position:relative;top:0;width:100%;height:auto;border-left:none;border-top:1px solid var(--border-color)}.main-wrapper{flex-direction:column}}@media(max-width:768px){:root{--header-height: 64px}.main-content{padding:var(--space-md)}.calculator-grid{grid-template-columns:1fr}}.switch{position:relative;display:inline-block;width:60px;height:34px}.switch input{opacity:0;width:0;height:0}.slider{position:absolute;cursor:pointer;inset:0;background-color:#2196f3;-webkit-transition:.4s;transition:.4s;z-index:0;overflow:hidden}.sun-moon{position:absolute;content:"";height:26px;width:26px;left:4px;bottom:4px;background-color:#ff0;-webkit-transition:.4s;transition:.4s}.switch input:checked+.slider{background-color:#000}.switch input:focus+.slider{box-shadow:0 0 1px #2196f3}.switch input:checked+.slider .sun-moon{-webkit-transform:translateX(26px);-ms-transform:translateX(26px);transform:translate(26px);background-color:#fff;-webkit-animation:rotate-center .6s ease-in-out both;animation:rotate-center .6s ease-in-out both}.moon-dot{opacity:0;transition:.4s;fill:gray}.switch input:checked+.slider .sun-moon .moon-dot{opacity:1}.slider.round{border-radius:34px}.slider.round .sun-moon{border-radius:50%}#moon-dot-1{left:10px;top:3px;position:absolute;width:6px;height:6px;z-index:4}#moon-dot-2{left:2px;top:10px;position:absolute;width:10px;height:10px;z-index:4}#moon-dot-3{left:16px;top:18px;position:absolute;width:3px;height:3px;z-index:4}#light-ray-1{left:-8px;top:-8px;position:absolute;width:43px;height:43px;z-index:-1;fill:#fff;opacity:10%}#light-ray-2{left:-50%;top:-50%;position:absolute;width:55px;height:55px;z-index:-1;fill:#fff;opacity:10%}#light-ray-3{left:-18px;top:-18px;position:absolute;width:60px;height:60px;z-index:-1;fill:#fff;opacity:10%}.cloud-light{position:absolute;fill:#eee;animation-name:cloud-move;animation-duration:6s;animation-iteration-count:infinite}.cloud-dark{position:absolute;fill:#ccc;animation-name:cloud-move;animation-duration:6s;animation-iteration-count:infinite;animation-delay:1s}#cloud-1{left:30px;top:15px;width:40px}#cloud-2{left:44px;top:10px;width:20px}#cloud-3{left:18px;top:24px;width:30px}#cloud-4{left:36px;top:18px;width:40px}#cloud-5{left:48px;top:14px;width:20px}#cloud-6{left:22px;top:26px;width:30px}@keyframes cloud-move{0%{transform:translate(0)}40%{transform:translate(4px)}80%{transform:translate(-4px)}to{transform:translate(0)}}.stars{transform:translateY(-32px);opacity:0;transition:.4s}.star{fill:#fff;position:absolute;-webkit-transition:.4s;transition:.4s;animation-name:star-twinkle;animation-duration:2s;animation-iteration-count:infinite}.switch input:checked+.slider .stars{-webkit-transform:translateY(0);-ms-transform:translateY(0);transform:translateY(0);opacity:1}#star-1{width:20px;top:2px;left:3px;animation-delay:.3s}#star-2{width:6px;top:16px;left:3px}#star-3{width:12px;top:20px;left:10px;animation-delay:.6s}#star-4{width:18px;top:0;left:18px;animation-delay:1.3s}@keyframes star-twinkle{0%{transform:scale(1)}40%{transform:scale(1.2)}80%{transform:scale(.8)}to{transform:scale(1)}}@keyframes rotate-center{0%{-webkit-transform:rotate(0) translateX(0);transform:rotate(0) translate(0)}to{-webkit-transform:rotate(360deg) translateX(26px);transform:rotate(360deg) translate(26px)}}.login-modal-overlay{position:fixed;inset:0;background:#000000b3;display:flex;align-items:center;justify-content:center;z-index:2000;padding:var(--space-md);-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);animation:fadeIn .2s ease-out}.login-modal{background:var(--bg-primary);width:100%;max-width:420px;max-height:min(92dvh,760px);border-radius:var(--radius-lg);box-shadow:var(--shadow-xl);border:1px solid var(--border-color);overflow:hidden;display:flex;flex-direction:column;animation:scaleIn .2s ease-out}.login-modal-header{display:flex;align-items:center;justify-content:space-between;padding:var(--space-lg);border-bottom:1px solid var(--border-color)}.login-modal-header h3{margin:0;font-size:var(--text-lg)}.login-modal-close{background:transparent;border:none;color:var(--text-secondary);cursor:pointer;padding:4px;border-radius:4px;display:flex;align-items:center}.login-modal-close:hover{background:var(--bg-secondary);color:var(--text-primary)}.login-modal-body{padding:var(--space-xl);overflow-y:auto}.login-intro{font-size:var(--text-base);color:var(--text-secondary);margin-bottom:var(--space-lg);line-height:1.5;text-align:center}.login-google-btn{width:100%;display:flex;align-items:center;justify-content:center;gap:var(--space-sm);padding:12px 16px;background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-md);font-size:var(--text-base);font-weight:500;color:var(--text-primary);cursor:pointer;transition:all var(--transition-fast)}.login-google-btn:hover{background:var(--bg-secondary);border-color:var(--border-hover);box-shadow:var(--shadow-sm)}.login-divider{display:flex;align-items:center;margin:var(--space-lg) 0;color:var(--text-muted);font-size:var(--text-sm)}.login-divider:before,.login-divider:after{content:"";flex:1;border-bottom:1px solid var(--border-color)}.login-divider span{padding:0 var(--space-md)}.login-email-form{display:flex;flex-direction:column;gap:var(--space-lg)}.input-group{display:flex;flex-direction:column;gap:var(--space-xs)}.input-group label{font-size:var(--text-sm);font-weight:500;color:var(--text-primary)}.input-group input{padding:10px 12px;background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--radius-md);color:var(--text-primary);font-size:var(--text-base)}.input-group input:focus{outline:none;border-color:var(--accent-primary);box-shadow:0 0 0 2px rgba(var(--accent-primary-rgb),.1)}.login-email-btn{width:100%;padding:12px;font-size:var(--text-base);justify-content:center}.login-privacy{margin-top:var(--space-xl);padding-top:var(--space-lg);border-top:1px solid var(--border-color);font-size:var(--text-xs);color:var(--text-muted)}.login-privacy h4{font-size:var(--text-sm);color:var(--text-secondary);margin-bottom:var(--space-xs);font-weight:600}.login-privacy p{line-height:1.4;margin:0}.login-error{margin-top:var(--space-md);padding:var(--space-sm);background:rgba(var(--accent-danger-rgb),.1);color:var(--accent-danger);border-radius:var(--radius-sm);font-size:var(--text-sm);text-align:center}.login-email-sent{text-align:center;display:flex;flex-direction:column;align-items:center;gap:var(--space-md)}.login-email-sent-icon{font-size:3rem;margin-bottom:var(--space-xs)}.login-email-sent h4{font-size:var(--text-xl);margin:0}.login-email-sent p{color:var(--text-secondary);margin:0;line-height:1.5}@media(max-width:640px){.login-modal-overlay{align-items:flex-start;padding:calc(var(--space-sm) + env(safe-area-inset-top)) var(--space-sm) calc(var(--space-sm) + env(safe-area-inset-bottom))}.login-modal{max-width:none;border-radius:var(--radius-md)}.login-modal-header{padding:var(--space-md)}.login-modal-body{padding:var(--space-lg)}.login-intro{font-size:var(--text-sm)}}@media(max-width:420px){.login-modal-body{padding:var(--space-md)}}.auth-btn-skeleton{width:80px;height:32px;border-radius:var(--radius-md);background:var(--bg-secondary);animation:pulse 1.5s ease infinite}.auth-login-btn{padding:6px 16px;background:var(--accent-primary);color:#fff;border:1px solid var(--accent-primary);border-radius:var(--radius-md);font-size:var(--text-sm);font-weight:600;cursor:pointer;transition:all var(--transition-fast);white-space:nowrap}.auth-login-btn:hover{background:var(--accent-primary-dark);border-color:var(--accent-primary-dark)}.auth-user-wrapper{position:relative}.auth-user-btn{display:flex;align-items:center;gap:var(--space-sm);padding:4px 10px;background:transparent;border:1px solid var(--border-color);border-radius:var(--radius-full);cursor:pointer;color:var(--text-primary);transition:all var(--transition-fast)}.auth-user-btn:hover{background:var(--bg-secondary);border-color:var(--border-hover)}.auth-avatar{width:28px;height:28px;border-radius:50%;object-fit:cover}.auth-avatar-placeholder{width:28px;height:28px;border-radius:50%;background:var(--accent-primary);color:#fff;display:flex;align-items:center;justify-content:center;font-size:var(--text-sm);font-weight:700}.auth-display-name{font-size:var(--text-sm);font-weight:500;max-width:120px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.auth-dropdown{position:absolute;top:calc(100% + 8px);right:0;background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);min-width:180px;max-width:min(280px,calc(100vw - 24px));z-index:100;animation:fadeIn .15s ease-out;overflow:hidden}.auth-dropdown-item{display:flex;align-items:center;gap:var(--space-sm);padding:10px 16px;font-size:var(--text-sm);color:var(--text-primary);text-decoration:none;cursor:pointer;transition:background var(--transition-fast);width:100%;background:none;border:none;text-align:left}.auth-dropdown-item:hover{background:var(--bg-secondary)}.auth-dropdown-divider{height:1px;background:var(--border-color)}.auth-dropdown-logout{color:var(--accent-danger)}.auth-dropdown-logout:hover{background:#c9302c14}@media(max-width:768px){.auth-display-name{display:none}.auth-user-btn{padding:4px}}@media(max-width:640px){.auth-dropdown{right:-6px}}.header{position:fixed;top:0;left:0;right:0;height:var(--header-height);background:#3a7ebff2;backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid rgba(255,255,255,.1);z-index:1000;box-shadow:0 4px 12px #0000000d;transition:background-color var(--transition-normal)}[data-theme=dark] .header{background:#0d2137f2;border-bottom:1px solid rgba(255,255,255,.05);box-shadow:0 4px 12px #0003}.header-content{display:flex;align-items:center;justify-content:space-between;height:100%;max-width:1600px;margin:0 auto;padding:0 var(--space-md);gap:var(--space-md)}.header-logo{display:flex;align-items:center;gap:var(--space-sm);color:#fff;font-weight:700;font-size:var(--text-xl);text-decoration:none;transition:opacity var(--transition-fast);margin-right:auto}.header-logo:hover{opacity:.9;color:#fff}.logo-image{height:60px;width:auto}.logo-text{font-family:Oswald,sans-serif;font-size:1.6rem;font-weight:600;color:#fff;text-transform:uppercase;letter-spacing:1px;line-height:1}.header-nav{display:flex;align-items:center;gap:var(--space-xs);min-width:0}.nav-item-wrapper{position:relative}.nav-link{display:flex;align-items:center;gap:var(--space-xs);padding:var(--space-sm) var(--space-md);color:#ffffffe6;font-size:var(--text-base);font-weight:500;text-decoration:none;border-radius:var(--radius-md);transition:all var(--transition-fast);background:transparent;border:none;cursor:pointer}.nav-link:hover{background:#ffffff26;color:#fff}.nav-link.active{background:#fff3;color:#fff}.nav-dropdown-trigger{font-family:inherit}.dropdown-arrow{font-size:var(--text-xs);transition:transform var(--transition-fast)}.nav-dropdown-trigger:hover .dropdown-arrow,.nav-item-wrapper:hover .dropdown-arrow{transform:rotate(180deg)}.dropdown-menu{position:absolute;top:100%;left:0;min-width:180px;background:var(--bg-card);border-radius:var(--radius-md);box-shadow:var(--shadow-lg);opacity:0;visibility:hidden;transform:translateY(-10px);transition:all var(--transition-fast);z-index:1001;overflow:hidden}.dropdown-menu.open{opacity:1;visibility:visible;transform:translateY(0)}.dropdown-item{display:block;padding:var(--space-sm) var(--space-md);color:var(--text-primary);font-size:var(--text-sm);text-decoration:none;transition:all var(--transition-fast)}.dropdown-item:hover{background:var(--bg-secondary);color:var(--accent-primary)}.dropdown-item.active{background:var(--accent-primary);color:#fff}.header-right{display:flex;align-items:center;gap:var(--space-md);margin-left:var(--space-md)}.theme-toggle-wrapper{display:flex;align-items:center}.mobile-nav-items,.mobile-nav-backdrop{display:none}.mobile-menu-btn{display:none;width:40px;height:40px;background:transparent;border:none;cursor:pointer;padding:var(--space-sm);color:#fff}.mobile-menu-btn svg{stroke:#fff}@media(max-width:1024px){.header-content{gap:var(--space-sm)}.header-logo{margin-right:var(--space-md)}.logo-image{height:52px}.logo-text{font-size:1.35rem}.mobile-menu-btn{display:flex;align-items:center;justify-content:center}.header-nav{position:fixed;top:var(--header-height);left:auto;right:0;bottom:0;flex-direction:column;align-items:stretch;gap:0;background:var(--bg-primary);width:min(92vw,420px);border-left:1px solid var(--border-color);padding:calc(var(--space-md) + env(safe-area-inset-top)) var(--space-md) calc(var(--space-lg) + env(safe-area-inset-bottom));transform:translate(100%);transition:transform var(--transition-normal);overflow-y:auto;z-index:999;overscroll-behavior:contain}.header-nav.mobile-open{transform:translate(0)}.mobile-nav-backdrop{display:block;position:fixed;top:var(--header-height);left:0;right:0;bottom:0;border:none;background:#0006;z-index:998;cursor:default}.nav-item-wrapper{border-bottom:1px solid var(--border-color)}.nav-item-wrapper:last-child{border-bottom:none}.nav-link{color:var(--text-primary);padding:var(--space-md);border-radius:0;border-bottom:none;width:100%;justify-content:space-between}.nav-link:hover,.nav-link.active{background:var(--bg-secondary);color:var(--accent-primary)}.nav-dropdown-trigger{width:100%}.dropdown-arrow{margin-left:auto}.dropdown-menu{position:static;display:none;opacity:1;visibility:visible;transform:none;box-shadow:none;border-radius:0;background:var(--bg-secondary);min-width:100%;border-top:1px solid var(--border-color)}.dropdown-menu.open{display:block}.dropdown-item{padding-left:var(--space-xl)}.header-right{margin-left:auto;gap:var(--space-sm)}}@media(max-width:640px){.logo-image{height:46px}.logo-text{font-size:1.15rem}.header-right{gap:var(--space-xs)}.header-nav{left:0;right:0;width:auto;border-left:none}}@media(max-width:480px){.logo-text{display:none}.header-logo{gap:0}.logo-image{height:40px}}.home-page{max-width:1600px;margin:0 auto;padding:0 var(--space-md);display:flex;flex-direction:column;gap:var(--space-xl);padding-bottom:var(--space-xl)}.hero-section{padding:var(--space-2xl) 0 0 0;margin-top:var(--space-lg);border-bottom:1px solid var(--border-color);padding-bottom:var(--space-xl);max-width:800px}.hero-content{display:flex;flex-direction:column;gap:var(--space-sm)}.hero-title{font-size:clamp(2rem,4vw,3rem);font-weight:800;color:var(--text-primary);line-height:1.2;letter-spacing:-.5px}[data-theme=dark] .hero-title{color:var(--text-primary)}.hero-description{font-size:1.1rem;color:var(--text-secondary);line-height:1.5;max-width:600px}.calculator-search-section{width:100%;max-width:100%;margin:0 auto;background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);padding:var(--space-lg);display:flex;flex-direction:column;gap:var(--space-md)}.calculator-search-header{display:flex;flex-direction:column;gap:var(--space-xs);align-items:center;text-align:center}.calculator-search-title{margin:0;font-size:1.35rem;color:var(--text-primary)}.calculator-search-description{margin:0;color:var(--text-secondary);line-height:1.45}.calculator-search-input-wrapper{display:flex;align-items:center;gap:var(--space-sm)}.calculator-search-input{width:100%;height:44px;padding:0 14px;border-radius:var(--radius-md);border:1px solid var(--border-color);background:var(--bg-secondary);color:var(--text-primary);font-size:.95rem;transition:border-color .2s ease,box-shadow .2s ease}.calculator-search-input:focus{outline:none;border-color:var(--accent-primary);box-shadow:0 0 0 3px #3a7ebf26}[data-theme=dark] .calculator-search-input:focus{box-shadow:0 0 0 3px #00d4ff26}.search-clear-btn{height:44px;padding:0 14px;border-radius:var(--radius-md);border:1px solid var(--border-color);background:var(--bg-tertiary);color:var(--text-secondary);font-size:.9rem;font-weight:600;cursor:pointer;transition:all .2s ease;white-space:nowrap}.search-clear-btn:hover{border-color:var(--accent-primary);color:var(--text-primary)}.search-suggestions{display:flex;flex-wrap:wrap;gap:8px;align-items:center}.search-suggestions-label{font-size:.85rem;color:var(--text-muted)}.search-suggestion-chip{border:1px solid var(--border-color);background:var(--bg-secondary);color:var(--text-secondary);border-radius:999px;padding:5px 10px;font-size:.82rem;cursor:pointer;transition:all .2s 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var(--border-color);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);padding:var(--space-lg);display:flex;flex-direction:column;gap:var(--space-md)}.recent-calcs-header{display:flex;flex-direction:column;gap:var(--space-xs)}.recent-calcs-title{margin:0;font-size:1.35rem;color:var(--text-primary)}.recent-calcs-description{margin:0;color:var(--text-secondary);line-height:1.45}.recent-calcs-state{margin:0;color:var(--text-secondary);font-size:.92rem}.recent-calcs-state.error{color:var(--accent-danger)}.recent-calcs-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--space-md)}.recent-calc-card{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--radius-md);padding:var(--space-md);display:flex;flex-direction:column;gap:var(--space-sm);text-decoration:none;transition:border-color .2s ease,transform .2s ease,box-shadow .2s 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.group-title{color:var(--accent-primary-light)}.group-divider{flex:1;height:1px;background:var(--border-color)}.categories-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:var(--space-lg)}.category-group>.categories-grid{grid-template-columns:repeat(auto-fit,minmax(200px,220px));justify-content:center}.modern-card{background:var(--bg-card);border-radius:var(--radius-lg);padding:var(--space-lg);display:flex;flex-direction:column;align-items:center;text-align:center;text-decoration:none;border:1px solid var(--border-color);box-shadow:var(--shadow-sm);transition:all .25s cubic-bezier(.25,.8,.25,1);position:relative;overflow:hidden}.modern-card:hover{transform:translateY(-4px);border-color:var(--accent-primary);box-shadow:0 10px 20px #3a7ebf1a}[data-theme=dark] .modern-card:hover{box-shadow:0 10px 20px #00d4ff1a}.icon-wrapper{width:60px;height:60px;background:linear-gradient(135deg,var(--accent-primary) 0%,var(--accent-primary-dark) 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0;border-top:1px solid var(--border-color);color:var(--text-muted);font-size:var(--text-sm);margin-top:auto}.footer-content{display:flex;flex-direction:column;gap:var(--space-xs)}.home-footer a{color:var(--accent-primary);font-weight:600;transition:color .2s ease}.home-footer a:hover{color:var(--accent-primary-light);text-decoration:underline}.home-credit{margin-top:0;opacity:.8}@media(max-width:1024px){.categories-grid{grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:var(--space-lg)}.category-group>.categories-grid{grid-template-columns:repeat(auto-fit,minmax(170px,200px))}.recent-calcs-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:768px){.home-page{padding:0 var(--space-md);gap:var(--space-xl)}.hero-section{padding:var(--space-xl) 0 0 0;margin-top:var(--space-sm)}.calculator-search-section{padding:var(--space-md)}.calculator-search-title{font-size:1.15rem}.recent-calcs-section{padding:var(--space-md)}.recent-calcs-title{font-size:1.15rem}.hero-title{font-size:1.8rem}.group-title{font-size:1.2rem}.categories-grid{grid-template-columns:repeat(2,1fr);gap:var(--space-md)}.category-group>.categories-grid{grid-template-columns:repeat(auto-fit,minmax(160px,210px));justify-content:center}.recent-calcs-grid{grid-template-columns:1fr}.modern-card{padding:var(--space-md)}.icon-wrapper{width:50px;height:50px;border-radius:10px;margin-bottom:var(--space-sm)}.category-icon-img{width:28px;height:28px}.category-icon-img.large{width:32px;height:32px}.category-title{font-size:.95rem}}@media(max-width:480px){.categories-grid{grid-template-columns:1fr;gap:var(--space-sm)}.calculator-search-input-wrapper{flex-direction:column;align-items:stretch}.search-clear-btn{width:100%}.hero-title{font-size:1.5rem}.modern-card{flex-direction:row;align-items:center;text-align:left;gap:var(--space-md);padding:var(--space-sm) 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ease}.wiki-export-close-btn:hover{background:#e74c3c;border-color:#e74c3c;color:#fff}.wiki-export-modal-body{flex:1;overflow:auto;padding:var(--space-lg);min-height:0}.wiki-markup-preview{background:var(--bg-tertiary);border:1px solid var(--border-color);border-radius:var(--radius-md);padding:var(--space-lg);font-family:var(--font-mono);font-size:13px;line-height:1.6;white-space:pre-wrap;word-break:break-all;overflow-wrap:anywhere;color:var(--text-primary);min-height:300px;height:100%;width:100%;margin:0;box-sizing:border-box;resize:none;outline:none;display:block}.wiki-markup-preview:focus{border-color:var(--accent-primary);box-shadow:0 0 0 2px #3a7ebf33}.wiki-markup-preview::-webkit-scrollbar{width:8px;height:8px}.wiki-markup-preview::-webkit-scrollbar-track{background:var(--bg-secondary);border-radius:4px}.wiki-markup-preview::-webkit-scrollbar-thumb{background:var(--border-color);border-radius:4px}.wiki-markup-preview::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}.wiki-export-modal-footer{padding:var(--space-lg);border-top:1px solid var(--border-color);display:flex;justify-content:flex-end;gap:var(--space-sm);background:var(--bg-tertiary)}.wiki-export-copy-btn{padding:12px 28px;background:var(--accent-primary);color:#fff;border:none;border-radius:var(--radius-md);font-size:var(--text-sm);font-weight:600;cursor:pointer;transition:all .2s ease;min-width:160px}.wiki-export-copy-btn:hover{background:var(--accent-primary-light);transform:translateY(-1px);box-shadow:0 4px 12px #3a7ebf4d}.wiki-export-copy-btn:active{transform:translateY(0)}.wiki-export-copy-btn.copied{background:var(--accent-success)}@media(max-width:640px){.wiki-export-modal-overlay{padding:var(--space-sm)}.wiki-export-modal{max-height:90dvh}.wiki-export-modal-header{padding:var(--space-md)}.wiki-export-modal-header h3{font-size:var(--text-base)}.wiki-export-modal-body{padding:var(--space-md)}.wiki-markup-preview{font-size:11px;padding:var(--space-md);max-height:300px}.wiki-export-modal-footer{padding:var(--space-md)}.wiki-export-copy-btn{width:100%;padding:14px 20px}}.save-as-post-btn{display:flex;align-items:center;justify-content:center;gap:8px;width:100%;padding:12px 20px;background:var(--accent-success);color:#fff;border:none;border-radius:var(--radius-md);font-size:var(--text-sm);font-weight:600;cursor:pointer;transition:all .2s 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h3{font-size:var(--text-lg);margin-bottom:var(--space-sm);color:var(--accent-primary);padding-bottom:var(--space-sm);border-bottom:1px solid var(--border-color)}.calculator-card .btn-primary{width:100%;padding:12px 20px;font-size:var(--text-sm);font-weight:600;margin-top:var(--space-md);text-transform:uppercase;letter-spacing:.5px}.material-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(110px,1fr));gap:4px;margin-bottom:var(--space-md)}.material-btn{padding:6px 10px;font-size:12px;font-weight:500;background:var(--bg-card);color:var(--text-secondary);border:1px solid var(--border-color);border-radius:2px;cursor:pointer;transition:background-color .1s ease,border-color .1s ease;text-align:center}.material-btn:hover{background:var(--bg-secondary);border-color:var(--border-hover);color:var(--text-primary)}.material-btn.active{background:var(--accent-primary);color:#fff;border-color:var(--accent-primary)}.material-btn.active:hover{background:var(--accent-primary-light);border-color:var(--accent-primary-light)}.tier-display{background:linear-gradient(135deg,#2d8a3914,#3a7ebf14);border:1px solid var(--accent-success);border-radius:var(--radius-lg);padding:var(--space-lg);margin-top:var(--space-md);text-align:center}.tier-display .tier-label{font-size:var(--text-sm);color:var(--text-secondary);margin-bottom:var(--space-xs)}.tier-display .tier-value{font-size:var(--text-xl);font-weight:700;color:var(--accent-success)}.results-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:var(--space-sm);margin-top:var(--space-lg)}[data-theme=dark] .result-item{background:var(--bg-tertiary);border-color:var(--border-color)}.result-item{background:var(--bg-tertiary);border:1px solid var(--border-color);border-radius:var(--radius-md);padding:var(--space-md);text-align:center}.result-item .label{font-size:var(--text-xs);color:var(--text-muted);margin-bottom:var(--space-xs)}.result-item .value{font-family:var(--font-mono);font-size:var(--text-sm);color:var(--accent-primary);font-weight:600}select{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%2354595d'%3E%3Cpath d='M6 8L1 3h10z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center;padding-right:36px}.destruction-levels{display:flex;flex-direction:column;gap:2px;margin-bottom:var(--space-md)}.destruction-level-btn{display:flex;justify-content:space-between;align-items:center;padding:10px 14px;background:var(--bg-card);border:1px solid var(--border-color);border-radius:2px;color:var(--text-secondary);cursor:pointer;transition:background-color .1s ease,border-color .1s ease;font-size:13px}.destruction-level-btn:hover{background:var(--bg-secondary);border-color:var(--border-hover);color:var(--text-primary)}.destruction-level-btn.active{background:var(--bg-tertiary);border-color:var(--accent-primary);border-left:3px solid var(--accent-primary);color:var(--text-primary)}.destruction-level-btn .level-name{font-weight:600}.destruction-level-btn .level-value{font-family:var(--font-mono);font-size:12px;color:var(--text-muted)}.destruction-level-btn.active .level-value{color:var(--accent-primary)}.input-group label{color:var(--text-primary);font-weight:500}@media(max-width:768px){.results-grid{grid-template-columns:repeat(2,1fr)}.page-header h1{font-size:var(--text-xl)}}.single-calculator-card{background:var(--bg-card);border:1px solid 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var(--border-color);border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-sm)}.category-tabs{display:flex;flex-wrap:wrap;background:var(--bg-tertiary);border-bottom:1px solid var(--border-color);padding:6px;gap:4px}.category-tab{padding:10px 16px;background:transparent;border:1px solid transparent;border-radius:var(--radius-md);font-size:var(--text-sm);font-weight:500;color:var(--text-secondary);cursor:pointer;transition:all .2s ease;white-space:nowrap}.category-tab:hover{background:var(--bg-secondary);border-color:var(--border-color);color:var(--text-primary)}.category-tab.active{background:var(--bg-card);border-color:var(--accent-primary);color:var(--accent-primary);font-weight:600;box-shadow:0 2px 4px #3a7ebf26}@media(max-width:640px){.category-tabs{padding:4px;gap:2px}.category-tab{padding:8px 12px;font-size:var(--text-xs);flex:1 1 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var(--accent-primary-dark);border-radius:var(--radius-sm)}.calc-button:hover{background:var(--accent-primary-dark)}.protected-route-loading{text-align:center;padding-top:4rem}.protected-route-loading-text{color:var(--text-muted)}.destruction-table-wrap{overflow-x:auto}.destruction-table{width:100%;border-collapse:collapse;font-size:var(--text-sm)}.destruction-table-head-row{border-bottom:2px solid var(--border-color)}.destruction-table-head-cell{padding:var(--space-md)}.destruction-table-head-cell.material-col{text-align:left}.destruction-table-head-cell.value-col{text-align:center}.destruction-category-row{background-color:var(--bg-tertiary)}.destruction-category-cell{padding:var(--space-sm) var(--space-md);font-weight:600;color:var(--accent-primary)}.destruction-material-row{border-bottom:1px solid var(--border-color)}.destruction-material-name-cell{padding:var(--space-sm) var(--space-md);padding-left:var(--space-lg);font-weight:500}.destruction-material-value-cell{padding:var(--space-sm);text-align:center;font-family:var(--font-mono)}@media(max-width:640px){.destruction-table{min-width:720px}.destruction-table-head-cell,.destruction-material-name-cell,.destruction-material-value-cell{padding:var(--space-xs);font-size:12px}}@media(max-width:640px){.calc-info-grid{grid-template-columns:1fr}.scientific-row{flex-direction:column;align-items:stretch}.scientific-row .grow-2,.scientific-row .grow-1{flex:none}.sub-tabs{margin-bottom:1rem}}.volume-visualizer{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);overflow:hidden;display:flex;flex-direction:column;width:clamp(280px,24vw,360px);height:100%}.visualizer-header{display:flex;justify-content:space-between;align-items:center;padding:8px 12px;background:var(--bg-tertiary);border-bottom:1px solid var(--border-color)}.visualizer-header 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var(--border-color);font-size:12px;color:var(--text-secondary)}@media(max-width:1024px){.volume-page-layout{flex-direction:column}.volume-visualizer-section{position:static;order:-1}.volume-visualizer{width:100%;height:280px}}@media(max-width:768px){.volume-visualizer{height:250px}.visualizer-header{flex-direction:row}.visualizer-modal{width:95vw;height:min(72dvh,620px);margin:0}.visualizer-modal-controls{flex-direction:column;gap:4px;text-align:center}.visualizer-modal-overlay{padding:var(--space-sm)}}.explosion-reference{font-size:11px;color:#ff6b35;font-weight:500}.explosion-page-layout{display:flex;gap:24px;width:100%}.explosion-calculator-section{flex:1;min-width:0}.explosion-visualizer-section{flex-shrink:0;position:sticky;top:calc(var(--header-height) + 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8px;font-size:11px}.export-controls{flex-direction:column;align-items:stretch;gap:10px}.export-control-group{width:100%;justify-content:space-between}.export-control-group-checkbox{margin-left:0;justify-content:flex-start}.export-control-group input[type=range]{width:min(170px,45vw)}.export-modal-footer{flex-direction:column-reverse}.btn-cancel,.btn-export{width:100%;justify-content:center}.drop-dialog{padding:16px}.drop-dialog-buttons{flex-direction:column}.help-modal{border-radius:var(--radius-md)}.help-modal-header{padding:12px 14px}.help-modal-content{padding:14px}.help-grid{grid-template-columns:1fr}}.help-modal-overlay{position:fixed;inset:0;background:#000000b3;display:flex;align-items:center;justify-content:center;z-index:1000;padding:clamp(8px,2vw,24px);animation:fadeIn .2s ease}.help-modal{background:var(--bg-card);border-radius:var(--radius-lg);max-width:700px;width:100%;max-height:min(88dvh,860px);display:flex;flex-direction:column;overflow:hidden;animation:slideIn .2s ease}.help-modal-header{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--border-color);background:var(--bg-tertiary)}.help-modal-header h2{margin:0;font-size:18px;font-weight:600;color:var(--text-primary)}.help-modal-content{flex:1;overflow-y:auto;padding:20px}.help-section{margin-bottom:24px}.help-section:last-child{margin-bottom:0}.help-section h3{margin:0 0 12px;font-size:15px;font-weight:600;color:var(--accent-primary);border-bottom:1px solid var(--border-color);padding-bottom:6px}.help-section ol,.help-section ul{margin:0;padding-left:20px;color:var(--text-secondary);font-size:13px;line-height:1.8}.help-section li{margin-bottom:4px}.help-section li strong{color:var(--text-primary)}.help-section p{margin:0 0 8px;color:var(--text-secondary);font-size:13px;line-height:1.6}.help-section em{color:var(--text-muted);font-size:12px}.help-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:12px}.help-item{background:var(--bg-tertiary);padding:12px;border-radius:var(--radius-sm)}.help-item strong{display:block;color:var(--text-primary);font-size:13px;margin-bottom:4px}.help-item p{margin:0;color:var(--text-secondary);font-size:12px}.help-shortcuts{display:flex;flex-direction:column;gap:8px}.help-shortcuts>div{display:flex;align-items:center;gap:8px;font-size:13px}.help-shortcuts kbd{background:var(--bg-tertiary);border:1px solid var(--border-color);border-radius:4px;padding:2px 8px;font-family:inherit;font-size:12px;color:var(--text-primary)}.help-shortcuts span{color:var(--text-secondary);margin-left:auto}.tool-btn.help{background:var(--bg-tertiary)}.tool-btn.help:hover{background:var(--accent-primary);color:#fff;border-color:var(--accent-primary)}