.speed-calc-container,.speed-calc-container *,.speed-calc-container *::before,.speed-calc-container *::after{box-sizing:border-box}.speed-calc-container{--bg-primary:#f5f5f0;--bg-secondary:#fff;--bg-section:#fff;--border-color:#333;--text-primary:#222;--text-secondary:#555;--text-light:#666;--color-accent:#3498db;--color-success:#27ae60;--color-warning:#f39c12;--color-danger:#e74c3c;--color-purple:#9b59b6;--color-teal:#1abc9c;--shadow-sm:2px 2px 0 rgba(0,0,0,0.1);--shadow-md:4px 4px 0 rgba(0,0,0,0.15);--shadow-lg:8px 8px 0 rgba(0,0,0,0.15);--input-focus-bg:#fffacd;--title-color:#2c3e50;--title-shadow:2px 2px 0 rgba(255,255,255,0.5);--btn-hover-overlay:rgba(0,0,0,0.1);--result-speed-bg:#ebf5fb;--result-distance-bg:#eafaf1;--result-time-bg:#fef5e7;--info-bg:#f9f9f9;--footer-bg:#f0f0f0;--footer-border:#999}.speed-calc-container.dark{--bg-primary:#1a1a1a;--bg-secondary:#2d2d2d;--bg-section:#2d2d2d;--border-color:#e0e0e0;--text-primary:#e8e8e8;--text-secondary:#b0b0b0;--text-light:#909090;--color-accent:#5dade2;--color-success:#52c77a;--color-warning:#f5b041;--color-danger:#ec7063;--color-purple:#af7ac5;--color-teal:#48d1cc;--shadow-sm:2px 2px 0 rgba(255,255,255,0.08);--shadow-md:4px 4px 0 rgba(255,255,255,0.12);--shadow-lg:8px 8px 0 rgba(255,255,255,0.12);--input-focus-bg:#3a3a3a;--title-color:#7fb3d5;--title-shadow:2px 2px 0 rgba(0,0,0,0.5);--btn-hover-overlay:rgba(255,255,255,0.1);--result-speed-bg:#1e3a5f;--result-distance-bg:#1e4d2f;--result-time-bg:#5f3e1e;--info-bg:#242424;--footer-bg:#242424;--footer-border:#555}@media (prefers-color-scheme:dark){.speed-calc-container:not(.dark):not(.light){--bg-primary:#1a1a1a;--bg-secondary:#2d2d2d;--bg-section:#2d2d2d;--border-color:#e0e0e0;--text-primary:#e8e8e8;--text-secondary:#b0b0b0;--text-light:#909090;--color-accent:#5dade2;--color-success:#52c77a;--color-warning:#f5b041;--color-danger:#ec7063;--color-purple:#af7ac5;--color-teal:#48d1cc;--shadow-sm:2px 2px 0 rgba(255,255,255,0.08);--shadow-md:4px 4px 0 rgba(255,255,255,0.12);--shadow-lg:8px 8px 0 rgba(255,255,255,0.12);--input-focus-bg:#3a3a3a;--title-color:#7fb3d5;--title-shadow:2px 2px 0 rgba(0,0,0,0.5);--btn-hover-overlay:rgba(255,255,255,0.1);--result-speed-bg:#1e3a5f;--result-distance-bg:#1e4d2f;--result-time-bg:#5f3e1e;--info-bg:#242424;--footer-bg:#242424;--footer-border:#555}}.dark-mode-toggle{position:absolute;top:10px;right:10px;padding:6px 10px;background:var(--bg-secondary);border:1px solid var(--border-color);cursor:pointer;transition:all 0.2s;box-shadow:var(--shadow-sm);font-size:18px;font-weight:600;color:var(--text-primary);z-index:10;border-radius:4px}.dark-mode-toggle:hover{transform:translate(.5px,.5px);box-shadow:1px 1px 0 rgba(0,0,0,.15)}.dark-mode-toggle:active{transform:translate(2px,2px);box-shadow:none}.theme-icon{display:inline-block;line-height:1}.speed-calc-container{position:relative;all:initial;display:block;max-width:1180px;margin:20px auto;padding:20px;background:var(--bg-primary);border:2px solid var(--border-color);font-family:'Noto Sans KR','Malgun Gothic',sans-serif;color:var(--text-primary);box-shadow:var(--shadow-lg);box-sizing:border-box;border-radius:8px}.speed-calc-container *{box-sizing:border-box;margin:0;padding:0}.speed-calc-header{text-align:center;margin-bottom:20px;padding-bottom:15px;border-bottom:3px double var(--border-color)}.speed-calc-title{display:block;margin:0 0 8px 0;padding:0;font-size:28px;font-weight:700;color:var(--title-color);line-height:1.3;text-shadow:var(--title-shadow);font-family:'Noto Sans KR','Malgun Gothic',sans-serif}.speed-calc-subtitle{display:block;margin:0;padding:0;font-size:14px;color:var(--text-light);line-height:1.4;font-family:'Noto Sans KR','Malgun Gothic',sans-serif}.speed-calc-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:15px;margin-bottom:20px}.speed-calc-card{background:var(--bg-secondary);border:1px solid var(--border-color);padding:15px;box-shadow:var(--shadow-md);border-radius:6px}.speed-calc-card-title{display:block;margin:0 0 15px 0;padding:0 0 8px 0;border-bottom:1px solid var(--border-color);font-size:16px;font-weight:700;color:var(--text-primary);line-height:1.3;font-family:'Noto Sans KR','Malgun Gothic',sans-serif}.speed-card .speed-calc-card-title{color:var(--color-accent)}.distance-card .speed-calc-card-title{color:var(--color-success)}.time-card .speed-calc-card-title{color:var(--color-warning)}.speed-calc-field{margin-bottom:12px}.speed-calc-label{display:block;margin-bottom:5px;font-size:13px;font-weight:600;color:var(--text-secondary);line-height:1.3;font-family:'Noto Sans KR','Malgun Gothic',sans-serif}.speed-calc-input,.speed-calc-select{display:block;width:100%;height:36px;padding:8px 10px;margin:0;border:1px solid var(--border-color);border-radius:4px;background:var(--bg-secondary);background-color:var(--bg-secondary);font-size:14px;font-weight:600;font-family:'Noto Sans KR','Malgun Gothic',sans-serif;color:var(--text-primary);line-height:1.3;appearance:none;-webkit-appearance:none;-moz-appearance:none;outline:none;box-shadow:none;transition:all 0.2s}.speed-calc-input:focus,.speed-calc-select:focus{background:var(--input-focus-bg);background-color:var(--input-focus-bg);border-color:var(--color-warning);outline:none;box-shadow:none}.speed-calc-input::placeholder{color:var(--text-light);opacity:.6}.speed-calc-select{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23666' d='M6 9L1 4h10z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 8px center;background-size:12px;padding-right:30px;cursor:pointer}.speed-calc-container.dark .speed-calc-select,@media (prefers-color-scheme:dark){.speed-calc-container:not(.light) .speed-calc-select{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23b0b0b0' d='M6 9L1 4h10z'/%3E%3C/svg%3E")}}.speed-calc-select-full{width:100%}.speed-calc-input-row{display:flex;gap:8px}.speed-calc-input-row .speed-calc-input{flex:1;min-width:0}.speed-calc-input-row .speed-calc-select{flex:0 0 90px;width:90px}.speed-calc-time-row{display:flex;gap:6px}.speed-calc-time-item{flex:1;min-width:0}.speed-calc-time-item .speed-calc-input{text-align:center;margin-bottom:3px}.speed-calc-unit-text{display:block;text-align:center;font-size:11px;color:var(--color-warning);font-weight:600;line-height:1.2;font-family:'Noto Sans KR','Malgun Gothic',sans-serif}.speed-calc-result{margin-top:15px;padding:12px;border:2px solid var(--border-color);background:var(--bg-section);text-align:center;border-radius:4px}.speed-result-box{background:var(--result-speed-bg);border-color:var(--color-accent)}.distance-result-box{background:var(--result-distance-bg);border-color:var(--color-success)}.time-result-box{background:var(--result-time-bg);border-color:var(--color-warning)}.speed-calc-result-label{display:block;font-size:12px;font-weight:600;color:var(--text-secondary);margin-bottom:6px;line-height:1.3;font-family:'Noto Sans KR','Malgun Gothic',sans-serif}.speed-calc-result-value{display:block;font-size:20px;font-weight:700;color:var(--text-primary);line-height:1.3;font-family:'Noto Sans KR','Malgun Gothic',sans-serif}.speed-result-box .speed-calc-result-value{color:var(--color-accent)}.distance-result-box .speed-calc-result-value{color:var(--color-success)}.time-result-box .speed-calc-result-value{color:var(--color-warning)}.speed-calc-info-grid{display:grid;grid-template-columns:1fr 1fr;gap:15px;margin-bottom:20px}.speed-calc-info-box{background:var(--bg-secondary);border:1px solid var(--border-color);padding:15px;box-shadow:var(--shadow-md);border-radius:6px}.speed-calc-info-title{display:block;margin:0 0 12px 0;padding:0;font-size:15px;font-weight:700;color:var(--title-color);line-height:1.3;font-family:'Noto Sans KR','Malgun Gothic',sans-serif}.speed-calc-list{margin:0;padding:0 0 0 20px;list-style:disc}.speed-calc-list li{margin-bottom:6px;font-size:13px;line-height:1.5;color:var(--text-secondary);font-family:'Noto Sans KR','Malgun Gothic',sans-serif}.speed-calc-example{margin-bottom:10px;padding:10px;background:var(--info-bg);border-left:3px solid var(--color-warning);font-size:13px;line-height:1.5;color:var(--text-secondary);font-family:'Noto Sans KR','Malgun Gothic',sans-serif;border-radius:2px}.speed-calc-example:last-child{margin-bottom:0}.speed-calc-example strong{color:var(--color-warning);font-weight:700}.speed-calc-footer{padding:12px;background:var(--footer-bg);border:2px dashed var(--footer-border);text-align:center;border-radius:4px}.speed-calc-footer p{display:block;margin:0;padding:0;font-size:12px;color:var(--text-light);line-height:1.4;font-family:'Noto Sans KR','Malgun Gothic',sans-serif}@media (max-width:1024px){.speed-calc-grid{grid-template-columns:repeat(2,1fr)}.time-card{grid-column:1 / -1}}@media (max-width:768px){.speed-calc-container{padding:15px;margin:10px}.speed-calc-title{font-size:24px}.speed-calc-grid{grid-template-columns:1fr}.speed-calc-info-grid{grid-template-columns:1fr}.dark-mode-toggle{top:8px;right:8px;padding:5px 8px;font-size:16px}}@media (max-width:480px){.speed-calc-container{padding:12px;margin:8px}.speed-calc-time-row{gap:4px}.speed-calc-input,.speed-calc-select{font-size:13px;padding:6px 8px;height:32px}.speed-calc-result-value{font-size:18px}.dark-mode-toggle{padding:4px 7px;font-size:15px}}