:root{--bg-color: #020203;--panel-bg: rgba(255, 255, 255, .03);--glass-border: rgba(255, 255, 255, .08);--accent-color: #6366f1;--accent-glow: rgba(99, 102, 241, .3);--text-primary: #f8fafc;--text-secondary: #94a3b8;--success-color: #10b981;--danger-color: #ef4444;--font-main: "Outfit", "Noto Sans JP", sans-serif;--card-shadow: 0 8px 32px rgba(0, 0, 0, .8);--premium-border: rgba(255, 255, 255, .15)}body.light-mode{--bg-color: #f8fafc;--panel-bg: rgba(255, 255, 255, .8);--glass-border: rgba(15, 23, 42, .1);--accent-color: #4f46e5;--accent-glow: rgba(79, 70, 229, .1);--text-primary: #0f172a;--text-secondary: #64748b;--card-shadow: 0 8px 24px rgba(0, 0, 0, .05);--premium-border: rgba(0, 0, 0, .1)}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-main);background-color:var(--bg-color);color:var(--text-primary);min-height:100vh;display:flex;flex-direction:column;align-items:center;overflow-x:hidden;transition:background-color .4s ease,color .4s ease}body:before{content:"";position:fixed;top:0;left:0;width:100%;height:100%;z-index:-1;background-image:radial-gradient(circle at 10% 10%,rgba(99,102,241,.08) 0%,transparent 40%),radial-gradient(circle at 90% 90%,rgba(236,72,153,.08) 0%,transparent 40%),radial-gradient(circle at 50% 50%,rgba(255,255,255,.02) 0%,transparent 70%);pointer-events:none}#app{width:100%;max-width:1000px;padding:2rem;display:flex;flex-direction:column;gap:2rem;opacity:1!important;transition:opacity .5s ease}header{text-align:center;margin-bottom:1rem}.logo{display:flex;align-items:center;justify-content:center;gap:1rem;margin-bottom:.5rem}.logo h2{font-size:2.5rem;font-weight:600;background:linear-gradient(135deg,var(--text-primary) 0%,var(--accent-color) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;letter-spacing:-1px}.subtitle{color:var(--text-secondary);font-size:1rem;letter-spacing:2px;text-transform:uppercase;opacity:.8}.glass-panel{background:var(--panel-bg);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border:1px solid var(--premium-border);border-radius:24px;padding:2rem;box-shadow:var(--card-shadow),inset 0 0 20px #ffffff05;transition:transform .3s ease,background-color .3s ease,border-color .3s ease;position:relative}.glass-panel:after{content:"";position:absolute;inset:-1px;border-radius:24px;background:linear-gradient(135deg,rgba(255,255,255,.1),transparent 40%,rgba(255,255,255,.05));z-index:-1;pointer-events:none}.drop-zone{border:2px dashed var(--premium-border);cursor:pointer;text-align:center;padding:4rem 2rem;animation:float 6s ease-in-out infinite}.drop-zone:hover,.drop-zone.dragover{border-color:var(--accent-color);background:#6366f10d;box-shadow:0 0 20px var(--accent-glow)}.upload-icon{font-size:4rem;display:block;margin-bottom:1rem}.hidden{display:none!important}.section-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1rem;padding:0 1rem}.file-list{display:flex;flex-direction:column;gap:1.5rem}.file-card{background:#ffffff08;border:1px solid var(--glass-border);border-radius:16px;padding:1.5rem;display:flex;flex-direction:column;gap:1.2rem;animation:slideUp .4s ease-out}.file-info{display:flex;justify-content:space-between;align-items:center}.time-shortcut-container{display:flex;flex-wrap:wrap;gap:.4rem}.time-btn{background:#ffffff0d;border:1px solid var(--glass-border);color:var(--text-secondary);font-size:.7rem;padding:.3rem .6rem;border-radius:4px}.time-btn:hover{background:#ffffff1a;color:#fff}.waveform-container{width:100%;height:80px;background:#0003;border-radius:8px;overflow:hidden;cursor:pointer}.controls-row{display:flex;flex-direction:column;gap:1.5rem}.volume-section{display:flex;align-items:center;gap:1.5rem}.volume-label{width:60px;font-size:.85rem;color:var(--text-secondary)}.volume-slider-wrap{flex:1;display:flex;align-items:center;gap:1rem}.volume-slider-wrap input{flex:1}.volume-value{width:50px;font-size:.85rem;color:var(--accent-color);font-weight:600}.eq-section{display:grid;grid-template-columns:100px 1fr;gap:1rem}@media(max-width:600px){.eq-section{grid-template-columns:1fr}}.eq-modes{display:flex;flex-direction:column;gap:.5rem}.eq-mode-btn{background:#ffffff0d;border:1px solid var(--glass-border);color:var(--text-secondary);font-size:.75rem;padding:.4rem;border-radius:6px;text-align:left}.eq-mode-btn.active{background:var(--accent-color);color:#fff;border-color:var(--accent-color)}.eq-view{background:#0003;border-radius:12px;padding:1rem;min-height:140px}.eq-sliders-container{overflow-x:auto;padding-bottom:.5rem;width:100%}.eq-sliders{display:flex;gap:.5rem;min-width:min-content}.eq-v-slider{display:flex;flex-direction:column;align-items:center;gap:.4rem;width:45px}.eq-v-slider input{appearance:none;-webkit-appearance:none;writing-mode:vertical-lr;direction:rtl;width:6px;height:80px;background:#ffffff1a;border-radius:3px;outline:none}.eq-v-slider input::-webkit-slider-thumb{-webkit-appearance:none;width:14px;height:14px;background:var(--accent-color);border-radius:50%;cursor:pointer;box-shadow:0 0 10px var(--accent-glow)}.eq-v-slider span{font-size:9px;color:var(--text-secondary);white-space:nowrap}.eq-section.hide-eq{display:none}input[type=range]{accent-color:var(--accent-color);cursor:pointer}.primary-btn{width:100%;padding:1.2rem;border-radius:12px;background:linear-gradient(135deg,var(--accent-color) 0%,#4f46e5 100%);color:#fff;font-size:1.1rem;font-weight:600;position:relative;overflow:hidden;box-shadow:0 4px 15px var(--accent-glow)}.secondary-btn{background:transparent;border:1px solid var(--glass-border);color:var(--text-primary);padding:.8rem 1.5rem;border-radius:10px}.progress-bar-container{width:100%;height:12px;background:#ffffff0d;border-radius:6px;overflow:hidden;margin:1.5rem 0 .5rem}.progress-bar{height:100%;width:0%;background:linear-gradient(90deg,var(--accent-color),#ec4899);transition:width .3s ease}@keyframes float{0%,to{transform:translateY(0)}50%{transform:translateY(-10px)}}@keyframes slideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.preview-btn{background:#ffffff1a;color:#fff;width:36px;height:36px;border-radius:50%;display:flex;align-items:center;justify-content:center}.download-link{display:inline-block;padding:1.2rem 2.5rem;background:var(--success-color);color:#fff;text-decoration:none;border-radius:12px;font-weight:600;transition:all .2s ease;box-shadow:0 4px 15px #10b9814d}.download-link:hover{transform:translateY(-2px);box-shadow:0 8px 25px #10b98166;color:#fff}input[type=text],input[type=number],select{background:#0000000d;border:1px solid var(--premium-border);color:var(--text-primary);padding:.8rem;border-radius:8px;width:100%;transition:all .3s ease}body.dark-mode input[type=text],body.dark-mode input[type=number],body.dark-mode select{background:#0000004d;color:#fff}body.light-mode input[type=text],body.light-mode input[type=number],body.light-mode select{background:#ffffffe6;border-color:#0000001a;color:#0f172a}select option{background:var(--bg-color);color:var(--text-primary)}.settings-grid{display:grid;grid-template-columns:1fr 1fr;gap:2rem;margin-top:1rem}.estimate-box{margin-top:1.5rem;padding:1rem;background:#0003;border-radius:12px;font-size:.9rem;color:var(--text-secondary);text-align:center}.theme-toggle{position:absolute;top:1rem;right:1rem;background:var(--panel-bg);border:1px solid var(--premium-border);color:var(--text-primary);padding:.5rem;border-radius:50%;cursor:pointer;width:44px;height:44px;display:flex;align-items:center;justify-content:center;font-size:1.2rem;transition:all .3s ease;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);z-index:100}.theme-toggle:hover{transform:scale(1.1);border-color:var(--accent-color);box-shadow:0 0 15px var(--accent-glow)}.header-container{position:relative;width:100%;display:flex;justify-content:center;align-items:center;margin-bottom:2rem}.back-link{position:absolute;left:0;top:50%;transform:translateY(-50%);color:var(--text-secondary);text-decoration:none;font-size:.9rem;display:flex;align-items:center;gap:.5rem;transition:all .3s ease}.back-link:hover{color:var(--text-primary);transform:translateY(-50%) translate(-2px)}