@import"https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:wght@400;500;600;700&family=IBM+Plex+Serif:wght@500;600&display=swap";:root{--bg: #eef3f8;--panel: #ffffff;--ink: #152235;--muted: #5c6c7a;--primary: #1d4f91;--primary-dark: #123a6b;--accent: #0c7c8b;--border: rgba(21, 34, 53, .12);--shadow: 0 20px 45px rgba(18, 34, 52, .12);--gradient-1: #d9e9f7;--gradient-2: #f2f6fb;--gradient-3: #f7f9fc;--gradient-4: #ecf2f8;--card-bg: linear-gradient(160deg, #ffffff 0%, #eef5fb 100%);--dropzone-bg: #f8fbff;--advanced-bg: rgba(247, 251, 255, .7);--hero-chip-bg: rgba(12, 124, 139, .12);--badge-bg: rgba(29, 79, 145, .12)}[data-theme=dark]{--bg: #0a0e14;--panel: #151920;--ink: #e6edf3;--muted: #8b949e;--primary: #3b82f6;--primary-dark: #60a5fa;--accent: #06b6d4;--border: rgba(255, 255, 255, .12);--shadow: 0 20px 45px rgba(0, 0, 0, .4);--gradient-1: #1a1f2e;--gradient-2: #0f131a;--gradient-3: #0d1117;--gradient-4: #161b22;--card-bg: linear-gradient(160deg, #1a1f2e 0%, #0f1419 100%);--dropzone-bg: rgba(59, 130, 246, .05);--advanced-bg: rgba(59, 130, 246, .03);--hero-chip-bg: rgba(6, 182, 212, .15);--badge-bg: rgba(59, 130, 246, .15)}*{box-sizing:border-box}body{margin:0;font-family:IBM Plex Sans,system-ui,-apple-system,sans-serif;color:var(--ink);background:radial-gradient(circle at top right,var(--gradient-1) 0%,transparent 45%),radial-gradient(circle at 10% 30%,var(--gradient-2) 0%,transparent 55%),linear-gradient(140deg,var(--gradient-3) 0%,var(--gradient-4) 100%);min-height:100vh;transition:background .3s ease,color .3s ease}.page{padding:32px 6vw 80px;max-width:1200px;margin:0 auto}.topbar{display:flex;justify-content:space-between;align-items:center;gap:24px;padding:12px 0 24px}.topbar-right{display:flex;align-items:center;gap:20px}.brand{display:flex;align-items:center;gap:12px;font-weight:700;letter-spacing:.02em}.logo-icon{width:40px;height:40px;display:block;animation:logoFloat 3s ease-in-out infinite;filter:drop-shadow(0 4px 8px rgba(59,130,246,.2));transition:transform .3s ease,filter .3s ease}.logo-icon:hover{transform:scale(1.1) rotate(5deg);filter:drop-shadow(0 6px 16px rgba(59,130,246,.4))}@keyframes logoFloat{0%,to{transform:translateY(0)}50%{transform:translateY(-8px)}}.logo-dot{width:12px;height:12px;border-radius:50%;background:var(--primary);box-shadow:0 0 0 6px #3b82f629;transition:box-shadow .3s ease}.theme-toggle{position:relative;width:56px;height:28px;border-radius:999px;background:var(--border);cursor:pointer;transition:background .3s ease;border:1px solid var(--border)}.theme-toggle:hover{background:#3b82f626}.theme-toggle-slider{position:absolute;top:2px;left:2px;width:22px;height:22px;border-radius:50%;background:linear-gradient(135deg,var(--primary) 0%,var(--accent) 100%);transition:transform .3s ease;box-shadow:0 2px 8px #0003;display:flex;align-items:center;justify-content:center;font-size:12px}[data-theme=dark] .theme-toggle-slider{transform:translate(28px)}.theme-toggle-icon{width:14px;height:14px;display:block;color:#fff}.topnav{display:flex;gap:16px}.topnav a{text-decoration:none;color:var(--muted);font-weight:600;padding:8px 12px;border-radius:999px;transition:background .2s ease,color .2s ease}.topnav a:hover{background:#1d4f911f;color:var(--primary)}.lang-switcher{display:flex;gap:8px;padding:4px;border-radius:999px;background:#1d4f9114}.lang-switch{text-decoration:none;font-weight:700;color:var(--primary-dark);border:1px solid rgba(29,79,145,.3);padding:6px 12px;border-radius:999px;transition:background .2s ease,color .2s ease}.lang-switch:hover{background:#1d4f911f;color:var(--primary)}.lang-switch.active{background:var(--primary);color:#fff;border-color:var(--primary)}.hero{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:32px;align-items:center;margin-bottom:32px;animation:fadeUp .6s ease-out}.eyebrow{text-transform:uppercase;letter-spacing:.26em;font-size:.7rem;color:var(--accent);font-weight:700}h1,h2,h3{font-family:"IBM Plex Serif",serif;margin:0 0 12px}h1{font-size:clamp(2.2rem,3.6vw,3.2rem);line-height:1.12}.subtitle{color:var(--muted);max-width:520px;font-size:1rem}.hero-metrics{display:flex;gap:24px;flex-wrap:wrap;margin-top:20px}.hero-metrics div{display:grid;gap:4px;font-size:.9rem}.hero-metrics strong{color:var(--primary-dark)}.hero-card{background:var(--card-bg);border-radius:24px;padding:24px;box-shadow:var(--shadow);border:1px solid var(--border);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);transition:all .3s ease}.hero-card:hover{transform:translateY(-2px);box-shadow:0 24px 55px #3b82f626}.hero-card h2{font-size:1.4rem}.hero-chip{display:inline-flex;margin-top:16px;padding:6px 12px;border-radius:999px;background:var(--hero-chip-bg);color:var(--accent);font-weight:600;transition:all .3s ease}.main{display:grid;gap:24px}.panel{background:var(--panel);border-radius:24px;padding:32px;border:1px solid var(--border);box-shadow:var(--shadow);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);transition:all .3s ease}.panel h2{font-size:1.75rem;margin-bottom:8px;font-weight:600}.panel h3{font-size:1.15rem;margin-bottom:12px;font-weight:600;color:var(--ink)}.panel p.muted{font-size:.95rem;line-height:1.6;margin-bottom:24px}.panel-header{display:flex;justify-content:space-between;align-items:flex-start;gap:20px;margin-bottom:28px;padding-bottom:20px;border-bottom:1px solid var(--border)}.badge{background:var(--badge-bg);color:var(--primary);font-weight:600;padding:8px 16px;border-radius:999px;font-size:.85rem;letter-spacing:.02em;text-transform:uppercase;transition:all .3s ease;white-space:nowrap}.muted{color:var(--muted)}.grid{display:grid;gap:28px;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));align-items:start;margin-top:24px}.dropzone{border:2px dashed var(--border);border-radius:20px;padding:32px;display:grid;gap:16px;cursor:pointer;background:var(--dropzone-bg);transition:all .3s ease;text-align:center;min-height:180px;place-content:center}.dropzone.active{border-color:var(--primary);box-shadow:0 16px 30px #3b82f640;transform:scale(1.01)}.file-pill{padding:10px 14px;border-radius:999px;background:#1d4f9114;font-weight:600;font-size:.9rem}.controls{display:grid;gap:16px}.swap-button{border:1px dashed rgba(29,79,145,.4);background:transparent;color:var(--primary-dark);font-weight:600;padding:10px 12px;border-radius:12px;cursor:pointer;transition:background .2s ease,border .2s ease}.swap-button:hover{background:#1d4f9114;border-color:#1d4f9199}.swap-button:disabled{opacity:.6;cursor:not-allowed}.field{display:grid;gap:10px}.field span{font-size:.75rem;text-transform:uppercase;letter-spacing:.14em;color:var(--muted);font-weight:600}.field select,.field input{border:1.5px solid var(--border);border-radius:12px;padding:12px 16px;font-family:inherit;font-weight:500;font-size:.95rem;background:var(--panel);color:var(--ink);transition:all .3s ease}.field select:focus,.field input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px #3b82f61a}.toggle{display:flex;align-items:center;gap:12px;font-weight:600}.toggle input{display:none}.toggle-ui{width:46px;height:26px;border-radius:999px;background:#15223526;position:relative;transition:background .2s ease}.toggle-ui:after{content:"";width:20px;height:20px;border-radius:50%;background:#fff;position:absolute;top:3px;left:3px;transition:transform .2s ease;box-shadow:0 4px 10px #15223533}.toggle input:checked+.toggle-ui{background:var(--primary)}.toggle input:checked+.toggle-ui:after{transform:translate(20px)}.advanced{border:1.5px solid var(--border);border-radius:18px;padding:24px;display:grid;gap:20px;background:var(--advanced-bg);transition:all .3s ease;margin-top:24px}.advanced-header{padding-bottom:16px;border-bottom:1px solid var(--border)}.advanced-header h3{margin-bottom:8px;font-size:1.15rem;font-weight:600}.advanced-grid{display:grid;gap:20px;grid-template-columns:repeat(auto-fit,minmax(200px,1fr))}.range-inputs{display:grid;gap:12px;grid-template-columns:repeat(auto-fit,minmax(120px,1fr))}.primary{background:linear-gradient(135deg,var(--primary) 0%,var(--accent) 100%);color:#fff;border:none;padding:14px 28px;border-radius:12px;font-size:1rem;font-weight:600;cursor:pointer;transition:all .3s ease;position:relative;overflow:hidden;letter-spacing:.02em;margin-top:8px}.primary:before{content:"";position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,rgba(255,255,255,.2),transparent);transition:left .5s ease}.primary:hover:before{left:100%}.primary:disabled{opacity:.6;cursor:not-allowed}.primary:not(:disabled):hover{transform:translateY(-2px);box-shadow:0 14px 26px #3b82f659}.status{display:grid;gap:12px}.status-header{display:flex;justify-content:space-between;align-items:center;gap:16px}.status-pill{padding:6px 14px;border-radius:999px;background:#1522351a;font-weight:600}.status-pill.processing{background:#1d4f9126;color:var(--primary)}.status-pill.completed{background:#0c7c8b26;color:var(--accent)}.status-pill.failed{background:#bc3e3b26;color:#bc3e3b}.error{color:#bc3e3b;font-weight:600}.spinner{width:32px;height:32px;border-radius:50%;border:4px solid rgba(29,79,145,.2);border-top-color:var(--primary);animation:spin 1s linear infinite}.download{display:inline-flex;width:fit-content;padding:10px 18px;border-radius:999px;background:linear-gradient(135deg,var(--accent) 0%,var(--primary) 100%);color:#fff;text-decoration:none;font-weight:600;transition:all .3s ease}.download:hover{transform:translateY(-2px);box-shadow:0 8px 20px #3b82f64d}.format-grid{display:grid;gap:16px;grid-template-columns:repeat(auto-fit,minmax(200px,1fr))}.tools-grid{display:grid;gap:18px;grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}.tool-card{border:1px solid var(--border);border-radius:18px;padding:18px;display:grid;gap:12px;background:var(--advanced-bg);transition:all .3s ease}.tool-card:hover{border-color:var(--primary);transform:translateY(-2px);box-shadow:0 8px 20px #3b82f626}.tool-card h3{margin-bottom:6px;font-size:1.1rem}.tool-card input[type=file]{font-family:inherit}.format-card{border:1px solid var(--border);border-radius:16px;padding:16px;display:grid;gap:6px;background:var(--advanced-bg);text-align:left;cursor:pointer;transition:all .3s ease;text-decoration:none;color:inherit}.format-card span{color:var(--muted);font-size:.9rem}.conversion-info .panel-header{margin-bottom:20px}.conversion-info{background:#3b82f60a;border-left:3px solid var(--primary)}.benefits h3{margin:0 0 14px;font-size:1.05rem;color:var(--ink)}.benefits ul{margin:0;padding-left:20px;color:var(--muted);display:grid;gap:10px;line-height:1.6}.format-card:hover{transform:translateY(-3px);border-color:var(--primary);box-shadow:0 14px 26px #3b82f640}.format-card:focus-visible{outline:2px solid rgba(29,79,145,.5);outline-offset:2px}@keyframes fadeUp{0%{opacity:0;transform:translateY(18px)}to{opacity:1;transform:translateY(0)}}@keyframes spin{to{transform:rotate(360deg)}}@media (max-width: 720px){.topbar{flex-direction:column;align-items:flex-start;gap:12px}.topbar-right{width:100%;flex-direction:column;gap:12px}.topnav{flex-wrap:wrap;width:100%}.theme-toggle{align-self:center}.lang-switcher{align-self:stretch;justify-content:center}}@media (min-width: 960px){.hero{grid-template-columns:minmax(0,1.35fr) minmax(0,.9fr)}.grid{grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr)}}@media (max-width: 960px){.page{padding:24px 5vw 64px}.topbar{flex-direction:column;align-items:stretch;gap:16px}.topbar-right{flex-direction:column;gap:12px}.topnav{flex-wrap:wrap;gap:10px}.topnav a{flex:1 1 auto;text-align:center}.lang-switcher{align-self:stretch;justify-content:center}.theme-toggle{align-self:center}}@media (max-width: 600px){.page{padding:20px 18px 56px}.hero{grid-template-columns:1fr;gap:20px}.hero-card{border-radius:20px}.hero-metrics{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.panel{padding:18px;border-radius:18px}.panel-header{flex-direction:column;align-items:flex-start}.dropzone{padding:18px}.status-header{flex-direction:column;align-items:flex-start}.swap-button,.primary{width:100%}}@media (max-height: 520px) and (orientation: landscape){.page{padding:16px 4vw 40px}.hero{grid-template-columns:minmax(0,1.4fr) minmax(0,.9fr);gap:18px;margin-bottom:20px}.hero-metrics{grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}.panel{padding:16px}}[data-theme=dark] .toggle-ui:after{background:linear-gradient(135deg,#1a1f2e,#0f1419)}[data-theme=dark] .spinner{border-color:#3b82f633;border-top-color:var(--primary)}[data-theme=dark] .status-pill.processing{background:#3b82f633}[data-theme=dark] .status-pill.completed{background:#06b6d433}[data-theme=dark] .status-pill.failed{background:#ef444433;color:#f87171}[data-theme=dark] .error{color:#f87171}[data-theme=dark] .file-pill{background:#3b82f626}[data-theme=dark] .swap-button{border-color:#3b82f666;color:var(--primary-dark)}[data-theme=dark] .swap-button:hover{background:#3b82f61a;border-color:#3b82f699}