.transcode-container{--tc-primary: #2563eb;--tc-primary-dark: #1d4ed8;--tc-primary-soft: #eff6ff;--tc-success: #10b981;--tc-danger: #ef4444;--tc-text: #0f172a;--tc-muted: #64748b;--tc-subtle: #94a3b8;--tc-border: #e2e8f0;--tc-bg: #f6f8fc;--tc-card: #ffffff;--tc-code: #f8fafc;--tc-shadow: 0 22px 60px rgba(15, 23, 42, .1);--tc-radius-lg: 28px;--tc-radius-md: 20px;--tc-radius-sm: 14px;min-height:calc(100vh - 72px);padding:clamp(16px,2.4vw,32px);background:radial-gradient(circle at 12% 8%,rgba(37,99,235,.12),transparent 28%),radial-gradient(circle at 92% 18%,rgba(16,185,129,.1),transparent 24%),var(--tc-bg);color:var(--tc-text)}.transcode-shell{width:min(1380px,100%);margin:0 auto}.transcode-hero{position:relative;overflow:hidden;display:flex;align-items:flex-end;justify-content:space-between;gap:24px;padding:clamp(28px,4vw,44px);border-radius:var(--tc-radius-lg);color:#fff;background:linear-gradient(135deg,#0f172af5,#1e40afeb),linear-gradient(90deg,#0f172a,#1d4ed8);box-shadow:var(--tc-shadow)}.transcode-hero:after{content:"";position:absolute;right:-80px;top:-110px;width:320px;height:320px;border-radius:999px;background:#ffffff1f}.transcode-hero-content{position:relative;z-index:1;max-width:720px}.transcode-eyebrow{display:inline-flex;align-items:center;width:fit-content;margin-bottom:14px;padding:7px 12px;border:1px solid rgba(255,255,255,.2);border-radius:999px;color:#bfdbfe;background:#ffffff14;font-size:12px;font-weight:700;letter-spacing:.08em;text-transform:uppercase}.transcode-hero h1{margin:0;font-size:clamp(30px,4vw,46px);line-height:1.08;letter-spacing:-.04em}.transcode-hero p{margin:14px 0 0;max-width:620px;color:#ffffffc2;font-size:16px;line-height:1.7}.transcode-stats{position:relative;z-index:1;display:flex;flex-wrap:wrap;justify-content:flex-end;gap:10px;min-width:260px}.transcode-stats span{padding:10px 13px;border:1px solid rgba(255,255,255,.18);border-radius:999px;color:#e0f2fe;background:#ffffff1a;font-size:13px;font-weight:700;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}.transcode-workspace{display:grid;grid-template-columns:288px minmax(0,1fr);gap:22px;margin-top:22px;align-items:start}.transcode-sidebar,.transcode-container .mode-card,.transcode-container .editor-panel,.transcode-container .action-bar,.transcode-container .status-msg{border:1px solid rgba(226,232,240,.9);background:#ffffffeb;box-shadow:0 18px 44px #0f172a0f;-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px)}.transcode-sidebar{position:sticky;top:18px;padding:16px;border-radius:var(--tc-radius-md)}.sidebar-title{margin:2px 4px 14px;color:var(--tc-muted);font-size:13px;font-weight:800;letter-spacing:.08em;text-transform:uppercase}.transcode-tabs{display:flex;flex-direction:column;gap:10px}.cat-item{position:relative;width:100%;padding:14px 14px 14px 16px;border:1px solid transparent;border-radius:16px;color:var(--tc-text);background:transparent;cursor:pointer;text-align:left;transition:transform .18s ease,border-color .18s ease,background .18s ease,box-shadow .18s ease}.cat-item:before{content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;border-radius:999px;background:transparent}.cat-item:hover{border-color:#dbeafe;background:#f8fbff;transform:translate(2px)}.cat-item.active{border-color:#bfdbfe;background:linear-gradient(135deg,#eff6ff,#fff);box-shadow:0 12px 28px #2563eb1f}.cat-item.active:before{background:var(--tc-primary)}.cat-name,.cat-desc{display:block}.cat-name{font-size:15px;font-weight:800;line-height:1.35}.cat-desc{margin-top:5px;color:var(--tc-muted);font-size:12px;line-height:1.45}.transcode-main{display:flex;min-width:0;flex-direction:column;gap:16px}.mode-card{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:20px 22px;border-radius:var(--tc-radius-md)}.mode-label,.panel-kicker{color:var(--tc-primary);font-size:12px;font-weight:900;letter-spacing:.08em;text-transform:uppercase}.mode-card h2{margin:6px 0 4px;font-size:24px;line-height:1.2;letter-spacing:-.02em}.mode-card p{margin:0;color:var(--tc-muted);font-size:14px}.mode-example{flex-shrink:0;display:grid;gap:6px;min-width:168px;padding:12px 14px;border:1px solid var(--tc-border);border-radius:16px;background:var(--tc-code)}.mode-example span{color:var(--tc-muted);font-size:12px;font-weight:700}.mode-example code{color:var(--tc-primary-dark);font-family:JetBrains Mono,Fira Code,SFMono-Regular,Consolas,monospace;font-size:14px;font-weight:800}.editor-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.editor-panel{display:flex;min-width:0;min-height:500px;overflow:hidden;flex-direction:column;border-radius:var(--tc-radius-md)}.panel-header{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:18px 20px;border-bottom:1px solid var(--tc-border)}.panel-header h3{margin:4px 0 0;color:var(--tc-text);font-size:18px;line-height:1.2}.char-count{flex-shrink:0;padding:6px 10px;border-radius:999px;color:var(--tc-muted);background:#f1f5f9;font-size:12px;font-weight:700}.transcode-container .hint{margin:14px 18px 0;padding:11px 13px;border:1px solid #bfdbfe;border-radius:12px;color:#1e40af;background:#eff6ff;font-size:13px;line-height:1.5}.transcode-textarea{width:100%;flex:1;min-height:360px;padding:20px;border:0;outline:none;resize:vertical;color:var(--tc-text);background:linear-gradient(180deg,#fff,#fbfdff);font-family:JetBrains Mono,Fira Code,SFMono-Regular,Consolas,monospace;font-size:14px;line-height:1.72}.transcode-textarea::placeholder{color:var(--tc-subtle)}.transcode-textarea:focus{box-shadow:inset 0 0 0 2px #2563eb38}.output-textarea{background:#fbfdff}.transcode-container .action-bar{display:flex;flex-wrap:wrap;align-items:center;gap:10px;padding:14px;border-radius:18px}.transcode-btn,.transcode-container .copy-btn{display:inline-flex;align-items:center;justify-content:center;border-radius:12px;cursor:pointer;font-weight:800;transition:transform .18s ease,box-shadow .18s ease,background .18s ease,border-color .18s ease}.transcode-btn{min-height:42px;padding:0 18px;border:1px solid transparent;font-size:14px}.transcode-btn:hover,.transcode-container .copy-btn:hover{transform:translateY(-1px)}.transcode-btn:focus-visible,.transcode-container .copy-btn:focus-visible,.cat-item:focus-visible{outline:3px solid rgba(37,99,235,.22);outline-offset:2px}.transcode-btn.primary{color:#fff;background:linear-gradient(135deg,var(--tc-primary),var(--tc-primary-dark));box-shadow:0 12px 24px #2563eb40}.transcode-btn.secondary{color:#fff;background:linear-gradient(135deg,var(--tc-success),#059669);box-shadow:0 12px 24px #10b98138}.transcode-btn.ghost{color:var(--tc-muted);border-color:var(--tc-border);background:#fff}.transcode-btn.ghost:hover{color:var(--tc-danger);border-color:#fecaca;background:#fff7f7}.transcode-container .copy-btn{flex-shrink:0;min-height:34px;padding:0 13px;border:1px solid #bfdbfe;color:var(--tc-primary);background:var(--tc-primary-soft);font-size:13px}.transcode-container .copy-btn:hover{color:#fff;border-color:var(--tc-primary);background:var(--tc-primary);box-shadow:0 10px 20px #2563eb33}.transcode-container .status-msg{padding:12px 14px;border-radius:14px;font-size:14px;font-weight:700}.transcode-container .status-msg.success{border-color:#bbf7d0;color:#047857;background:#ecfdf5}.transcode-container .status-msg.error{border-color:#fecaca;color:#b91c1c;background:#fef2f2}.transcode-container .status-msg.info{border-color:#bfdbfe;color:#1d4ed8;background:#eff6ff}@media (max-width: 1080px){.transcode-hero{align-items:flex-start;flex-direction:column}.transcode-stats{justify-content:flex-start;min-width:0}.transcode-workspace{grid-template-columns:1fr}.transcode-sidebar{position:static}.transcode-tabs{display:grid;grid-template-columns:repeat(2,minmax(0,1fr))}}@media (max-width: 760px){.transcode-container{padding:12px}.transcode-hero,.mode-card,.editor-panel,.transcode-sidebar{border-radius:20px}.mode-card,.editor-grid{grid-template-columns:1fr}.mode-card{align-items:flex-start;flex-direction:column}.editor-panel{min-height:420px}.transcode-tabs{grid-template-columns:1fr}.transcode-container .action-bar,.transcode-btn{width:100%}.transcode-btn{flex:1 1 100%}}