:root{--font-family: Inter, "Microsoft Jhenghei UI", system-ui, Avenir, Helvetica, Arial, sans-serif;--line-height: 1.5;--font-weight: 400;--text-color: rgba(255, 255, 255, .87);--text-color-secondary: rgba(255, 255, 255, .7);--bg-color: #242424;--primary-color: #4a9eff;--section-bg: rgba(255, 255, 255, .03);--hover-bg: rgba(255, 255, 255, .05);--border-width: 1px;--border-style: solid;--border-color: rgba(255, 255, 255, .1);--container-padding: 1.5rem;--gap-small: .5rem;--gap-medium: 1rem;--gap-large: 2rem;--transition-time: .3s;--transition-func: cubic-bezier(.4, 0, .2, 1);--shadow-sm: 0 4px 20px rgba(0, 0, 0, .2);--shadow-lg: 0 8px 32px rgba(0, 0, 0, .3);font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;--z-index-base: 1;--z-index-content: 10;--z-index-header: 100;--z-index-nav: 200;--z-index-dropdown: 1000}body{margin:0;min-width:320px;min-height:100vh;font-family:var(--font-family);line-height:var(--line-height);font-weight:var(--font-weight);color:var(--text-color);background-color:var(--bg-color);display:flex;flex-direction:column;align-items:center;gap:var(--gap-medium);padding:var(--gap-medium)}.container{width:90%;max-width:1440px;margin:0 auto;padding:var(--container-padding);border:var(--border-width) var(--border-style) var(--border-color);background:var(--section-bg);border-radius:12px;position:relative;z-index:var(--z-index-base);transition:transform var(--transition-time) var(--transition-func),box-shadow var(--transition-time) var(--transition-func)}.container:not(header):not(nav):not(.dropdown-menu){backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px)}.container:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg)}header.container{text-align:center;padding:0;position:relative;z-index:var(--z-index-header);overflow:visible}.header-background{background-color:#1a1a1a;background-image:linear-gradient(#0009,#0009),url(/images/header/1.jpg);background-size:cover;background-position:center;padding:3rem 0;margin:0 calc(var(--container-padding) * -1);width:calc(100% + var(--container-padding) * 2)}header h1{margin:0 0 2rem;color:#fff;text-shadow:2px 2px 4px rgba(0,0,0,.5)}nav{position:relative;z-index:var(--z-index-nav)}nav ul{display:flex;justify-content:center;gap:2rem;padding:0;margin:0;list-style:none}nav a{color:var(--text-color);text-decoration:none;padding:.5rem 1rem;transition:all var(--transition-time);position:relative}nav a:after{content:"";position:absolute;bottom:0;left:50%;width:0;height:2px;background:var(--primary-color);transition:all var(--transition-time);transform:translate(-50%)}nav a:hover:after{width:100%}nav a:hover{color:#add8e6}.nav-menu{--menu-gap: 2rem;--hover-indicator-height: 2px;--dropdown-width: 180px;--dropdown-arrow-size: 12px;--dropdown-padding: .75rem;--item-hover-offset: 4px;display:flex;justify-content:center;gap:var(--menu-gap);padding:0;margin:0;list-style:none}.nav-item{position:relative;padding-bottom:20px}.nav-item>a{color:var(--text-color);text-decoration:none;padding:.5rem 1rem;display:block;transition:color var(--transition-time) var(--transition-func);white-space:nowrap}.nav-item>a:hover{color:var(--primary-color)}.nav-item .dropdown-menu li{width:100%}.nav-item .dropdown-menu a{width:100%;box-sizing:border-box;white-space:nowrap}.dropdown-menu{position:absolute;top:100%;left:50%;transform:translate(-50%);min-width:var(--dropdown-width);margin:-20px 0 0;z-index:var(--z-index-dropdown);background:var(--section-bg);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border:var(--border-width) var(--border-style) var(--border-color);border-radius:12px;box-shadow:var(--shadow-lg);opacity:0;visibility:hidden;pointer-events:none;transition:opacity var(--transition-time) var(--transition-func),visibility var(--transition-time) var(--transition-func),transform var(--transition-time) var(--transition-func),margin-top var(--transition-time) var(--transition-func);display:flex;flex-direction:column;list-style:none;padding:var(--dropdown-padding) 0}.dropdown-menu:before{content:"";position:absolute;top:calc(var(--dropdown-arrow-size) * -.5);left:50%;transform:translate(-50%) rotate(45deg);width:var(--dropdown-arrow-size);height:var(--dropdown-arrow-size);background:var(--section-bg);border-left:var(--border-width) var(--border-style) var(--border-color);border-top:var(--border-width) var(--border-style) var(--border-color)}.dropdown-menu a{display:block;padding:var(--dropdown-padding) calc(var(--dropdown-padding) * 1.67);text-decoration:none;color:var(--text-color);transition:all var(--transition-time) var(--transition-func);position:relative}.dropdown-menu a:hover{background:var(--hover-bg);color:var(--primary-color);transform:translate(var(--item-hover-offset))}.dropdown-menu a:before{content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);width:3px;height:0;background:var(--primary-color);transition:height var(--transition-time) var(--transition-func)}.dropdown-menu a:hover:before{height:70%}.nav-item:hover .dropdown-menu,.dropdown-menu:hover,.nav-item.active .dropdown-menu{opacity:1;visibility:visible;pointer-events:auto;transform:translate(-50%);margin-top:0}.dropdown-menu li{display:block;width:100%}.dropdown-menu a{display:block;width:100%;box-sizing:border-box}main.container{position:relative;z-index:var(--z-index-content)}.content-row{display:grid;gap:2rem;margin-bottom:2rem}.content-row:first-child{grid-template-columns:3fr 2fr}.content-row:last-child{grid-template-columns:1fr 1fr;margin-bottom:0}section{border:var(--border-width) var(--border-style) var(--border-color);padding:var(--container-padding);height:400px;display:flex;flex-direction:column;background:var(--section-bg);border-radius:8px;transition:transform var(--transition-time),box-shadow var(--transition-time)}section:hover{transform:translateY(-2px);box-shadow:0 4px 20px #0003}section h2{margin:0 0 1rem;padding-bottom:.5rem;border-bottom:var(--border-width) var(--border-style) var(--border-color)}.content-area{flex:1;overflow-y:auto;padding-right:.5rem}.content-area::-webkit-scrollbar{width:8px}.content-area::-webkit-scrollbar-track{background:#8080801a}.content-area::-webkit-scrollbar-thumb{background-color:#8080804d;border-radius:4px}.content-area::-webkit-scrollbar-thumb:hover{background-color:#80808066}.calculator-form{display:flex;flex-direction:column;gap:1rem;padding:1rem}.input-group{display:flex;flex-direction:column;gap:.5rem}.input-group label{font-weight:500}.input-group input{padding:.75rem 1rem;border:1px solid var(--border-color);background:#ffffff0d;color:var(--text-color);border-radius:4px;transition:all var(--transition-time)}.input-group input:focus{border-color:var(--primary-color);box-shadow:0 0 0 3px #4a9eff1a;outline:none}.input-group input[readonly]{background-color:#8080801a}.button-group{display:flex;gap:1rem;margin-top:1rem}.button-group button{padding:.5rem 1.5rem;border:1px solid var(--primary-color);background:transparent;color:var(--text-color);cursor:pointer;transition:all var(--transition-time);border-radius:4px;font-weight:500;letter-spacing:.5px}.button-group button:hover{background:var(--primary-color);color:#fff;transform:translateY(-2px);box-shadow:0 4px 15px #4a9eff4d}.admin-form{display:flex;flex-direction:column;gap:1rem;padding:1rem}.admin-form .input-group{display:flex;flex-direction:column;gap:.5rem}.admin-form input{padding:.5rem;border:1px solid var(--border-color);background:#ffffff0d;color:var(--text-color)}.admin-form .button-group{display:flex;gap:1rem;margin-top:1rem}.admin-form button{padding:.5rem 1rem;border:1px solid var(--primary-color);background:transparent;color:var(--text-color);cursor:pointer;transition:all var(--transition-time)}.admin-form button:hover{background:var(--primary-color);color:#fff;transform:translateY(-2px);box-shadow:0 4px 15px #4a9eff4d}.message-container{display:flex;flex-direction:column;gap:1rem;padding:1rem}.input-area{display:flex;flex-direction:column;gap:1rem}.message-container textarea{width:100%;padding:.5rem;border:1px solid var(--border-color);background:#ffffff0d;color:var(--text-color);resize:none}.message-container textarea[readonly]{background-color:#8080801a}.message-container .button-group{display:flex;gap:1rem}.message-container button{padding:.5rem 1rem;border:1px solid var(--primary-color);background:transparent;color:var(--text-color);cursor:pointer;transition:all var(--transition-time)}.message-container button:hover{background:var(--primary-color);color:#fff;transform:translateY(-2px);box-shadow:0 4px 15px #4a9eff4d}.planet-content{display:flex;flex-direction:column;gap:1.5rem;height:100%;overflow-y:auto;padding-right:.5rem}.planet-images{display:flex;flex-direction:column;gap:1rem}.planet-images figure{margin:0;text-align:center}.planet-images img{max-width:100%;height:auto;border:1px solid var(--border-color);border-radius:8px;object-fit:cover}.planet-images figcaption{margin-top:.5rem;font-size:.9rem;color:var(--text-color-secondary)}.planet-description{text-align:justify}.planet-description h3{margin:0 0 1rem;padding-bottom:.5rem;border-bottom:1px solid var(--border-color)}.planet-description p{margin:0 0 1rem;line-height:1.6;color:var(--text-color)}.planet-data h4{margin:0 0 1rem;padding-bottom:.5rem;border-bottom:1px solid var(--border-color)}.data-list{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1rem;margin:0}.data-item{display:flex;flex-direction:column;gap:.25rem}.data-item dt{font-weight:700;color:var(--text-color)}.data-item dd{margin:0;color:var(--text-color-secondary)}.planet-content::-webkit-scrollbar{width:8px}.planet-content::-webkit-scrollbar-track{background:#ffffff1a}.planet-content::-webkit-scrollbar-thumb{background-color:#ffffff4d;border-radius:4px}.planet-content::-webkit-scrollbar-thumb:hover{background-color:#fff6}footer.container{text-align:center}footer hr{margin:0 0 1rem;border:none;border-top:var(--border-width) var(--border-style) var(--border-color)}.footer-content{display:flex;justify-content:space-between;color:var(--text-color)}@media (max-width: 768px){.content-row{grid-template-columns:1fr}.container{padding:1rem}.button-group{flex-wrap:wrap}.button-group button{flex:1;min-width:120px}}