:root{color-scheme:dark;--green:#39ead4;--ink:#ecf2ff;--muted:#a2afc8;--line:#29344b;color:var(--ink);background:#080c16;--violet:#a88bff}
body{background:radial-gradient(ellipse at 88% 0%,#682fc31b,transparent 46%),radial-gradient(ellipse at 22% 40%,#13d9c910,transparent 42%),#080c16}
::selection{background:#39ead440;color:#fff}
#sidebar{background:linear-gradient(180deg,#111729,#0a101d);border-right:1px solid #2a354a;box-shadow:8px 0 40px #0002}
.brand{font-size:24px;letter-spacing:-.7px}.brandmark{color:var(--green);text-shadow:0 0 20px #39ead455}.beta{color:#b4c0d9;border-color:#334361;border-radius:5px;font-size:10px}
.navlabel{color:#8d9cb7;font-size:12px}.navitem{color:#b2bfd5;border:1px solid transparent;border-radius:10px;transition:background .18s,border-color .18s}.navitem:hover{background:#1c2538;color:#fff}.navitem.active{color:#65f9e7;background:linear-gradient(100deg,#39ead418,#a88bff10);border-color:#39ead438;box-shadow:inset 3px 0 var(--green)}.navicon{color:#94a7cc}.navitem.active .navicon{color:var(--green)}
.sidebottom{border-color:var(--line)}.privacyicon{color:var(--green)}.sidebottom b{color:#e6efff}.sidebottom p{color:#9eacc5}.sidehelp{color:#95e9df}
header{background:#0d1320e8;backdrop-filter:blur(18px);border-color:var(--line)}.breadcrumb{color:#9eacc5}.breadcrumb b{color:#e9efff}.breadcrumb span{color:#65738c}.freebadge{background:#39ead40c;border-color:#39ead436;color:#64edda}.textbutton{color:#a8b7d4}.textbutton:hover{color:#57f5df}.iconbutton{color:#cbd7eb}
main{padding-top:40px}.eyebrow{color:var(--green);font-size:12px;letter-spacing:2px}h1{font-size:clamp(32px,3.5vw,46px);letter-spacing:-1.8px;color:#f2f6ff}.subtitle{color:var(--muted);font-size:16px;max-width:650px}.titleline{align-items:flex-start;margin-bottom:30px}.toolbadge,.toolbadge.local{color:#c7b6ff;background:#a88bff10;border:1px solid #a88bff3d;border-radius:24px;font-size:14px;margin-top:8px}
.workspace{gap:22px}.editor,.settings{background:linear-gradient(145deg,#141d2e,#101827);border-color:#2b3850;border-radius:18px;box-shadow:0 16px 40px #0003}.sectiontop{border-color:#29354a;background:#ffffff02}.sectiontop b{color:#dce8fb}.step{background:#19253a;color:#84eddf;border-color:#334561;border-radius:7px;font-size:12px}.small{color:#97a8c3}
.dropzone{min-height:335px;background:radial-gradient(ellipse at center,#39ead40c,transparent 65%),#0e1625;border:1px dashed #415772;border-radius:15px;position:relative}.dropzone:hover,.dropzone.drag{border-color:var(--green);background:radial-gradient(ellipse at center,#39ead41b,transparent 75%),#0d1928}.dropzone h2{font-size:24px;color:#f1f5ff;margin-top:20px}.dropzone p{color:#a5b5cf;line-height:1.6}.uploadicon{width:68px;height:68px;color:var(--green);background:linear-gradient(135deg,#39ead417,#a88bff17);border:1px solid #39ead444;border-radius:19px;box-shadow:0 0 30px #39ead412;font-size:36px}
.primary{color:#072520;font-weight:800;font-size:15px;background:linear-gradient(100deg,#31dcc8,#7ef5d5);border:1px solid #86ffdf66;border-radius:10px;box-shadow:0 6px 24px #39ead41c;transition:transform .18s,box-shadow .18s}.primary:hover:not(:disabled){background:linear-gradient(100deg,#55f0d9,#9bffe1);box-shadow:0 8px 30px #39ead438;transform:translateY(-1px)}.primary:disabled{background:#233348;color:#97a8c3;box-shadow:none;border-color:#33415a;opacity:1}
.editorbottom>span{color:#a1b3cd}.controlgroup label{color:#d5e0f3}.controlgroup select,.controlgroup input[type=number],.controlgroup input[type=url]{color:#eef4ff;background:#0b1321;border-color:#35445e;border-radius:9px}.controlgroup select:focus,.controlgroup input:focus{border-color:var(--green)}.helptext{color:#a3b2cc;font-size:14px;line-height:1.75}.notice{background:#a88bff0c;border-color:#a88bff38;border-radius:10px;color:#c9c0e7;font-size:14px}.choice{border-color:#35445e;background:#0d1625}.choice b{color:#e2ecfa}.choice span{color:#a6b4cc}
#status{color:#acbad0;font-size:14px}#status.error{color:#ffad9f}progress{height:8px;border:0;border-radius:5px;overflow:hidden;background:#233149}progress::-webkit-progress-bar{background:#233149}progress::-webkit-progress-value{background:linear-gradient(90deg,var(--green),var(--violet))}progress::-moz-progress-bar{background:var(--green)}
#loaded{min-height:350px}.fileicon{background:#39ead415;color:var(--green)}canvas{background:linear-gradient(90deg,#39ead407,#a88bff09);border:1px solid #2e3d55;border-radius:11px}audio{border-radius:8px;opacity:.92}
.resultrow,.statrow{background:#121c2d;border-color:#304059;border-radius:13px}.resultrow b{color:#e3edff}.download{background:#39ead412;color:#7ef6e3;border-color:#39ead438;font-size:14px;border-radius:9px}.download:hover{background:#39ead425;border-color:var(--green)}.resultnote{color:#a4b4cd}.statrow span{color:#a4b4cd}
.exploreheading h2,.quick-guides h2{color:#eef3ff}.exploreheading span{color:#9fafc7}.toolcard{background:linear-gradient(140deg,#152035,#101726);border-color:#2d3c56;border-radius:15px;transition:transform .18s,border-color .18s}.toolcard:hover{border-color:#a88bff;box-shadow:0 10px 30px #a88bff12}.cardicon{background:#a88bff17;color:#c5b0ff;border:1px solid #a88bff30;border-radius:12px;width:46px;height:46px}.toolcard h3{font-size:17px;color:#eaf1ff}.toolcard p{color:#a7b7d1}.toolcard .small{color:#8edbce;font-size:11px}
.ad-slot{background:#0d1522;border-color:#26324a;color:#9dacbf;min-height:90px}.quick-guides{border-color:var(--line)}.guide-grid article{padding:20px;background:#111b2b;border:1px solid #27364f;border-radius:14px}.guide-grid h3{margin-top:0;color:#dce8ff}.guide-grid p{color:#a4b4cd;font-size:15px}.infofooter{border-color:var(--line)}.infofooter span,footer{color:#95a5bf}
dialog{background:#121d30;color:#f0f4ff;border-color:#3a4b69;box-shadow:0 30px 100px #0008}dialog::backdrop{background:#030814c9;backdrop-filter:blur(5px)}#dialogBody{color:#b3c2db}#dialogBody b{color:#e7efff}.tunerdisplay{background:#0d1829;border-color:#3c526f}.tunerdisplay span{color:#b4c7e0}
.stem-mixer{padding:22px;background:linear-gradient(130deg,#122837,#211932);border:1px solid #39ead438;border-radius:16px;margin-bottom:20px}.stem-mixer h3{margin:0 0 8px;font-size:20px;color:#eafffa}.stem-mixer p{color:#b0c1d7;font-size:14px;line-height:1.7}.stem-channels{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin:20px 0}.stem-channel{padding:15px;border:1px solid #3b4a62;background:#0c1528b0;border-radius:12px}.stem-channel b{display:block;margin-bottom:12px;font-size:15px;color:#e0eaff}.stem-channel label{display:flex;justify-content:space-between;gap:6px;margin:10px 0;color:#b9c9e3;font-size:14px}.stem-channel button{font-size:14px;padding:6px 10px;border:1px solid #415471;border-radius:7px;background:#16243a;color:#b6c6e0}.stem-channel button[aria-pressed=true]{color:#092822;background:#6cede0;border-color:#6cede0}.stem-actions{display:flex;flex-wrap:wrap;gap:10px}.stem-status{min-height:22px}
@media(max-width:1100px){.stem-channels{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:800px){main{padding:28px 18px}.dropzone{margin:16px;min-height:300px}.titleline{gap:12px}.subtitle{font-size:16px}.editor,.settings{border-radius:15px}.stem-mixer{padding:16px}.stem-channels{gap:9px}.freebadge{font-size:12px;padding:5px 8px}.guide-grid article{margin-bottom:10px}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}
.tool-guide{margin:36px 0 20px;padding:26px;background:#111c2c;border:1px solid #2c3d55;border-radius:16px;max-width:100%}.tool-guide h2{color:#e9f5ff;font-size:24px;margin-top:0}.tool-guide h3{color:#cbb8ff;font-size:17px;margin-top:24px}.tool-guide p,.tool-guide li{color:#adbed6;font-size:16px;line-height:1.85}.tool-guide ol{padding-left:24px}.tool-guide li{padding-left:5px;margin-bottom:7px}.seo-links{display:flex;flex-wrap:wrap;gap:10px;padding:0 0 20px}.seo-links a{padding:9px 12px;background:#101a2b;border:1px solid #2d3d56;border-radius:8px;color:#a9bed8;font-size:14px}.seo-links a:hover{border-color:#39ead477;color:#77f5e0}@media(max-width:800px){.tool-guide{padding:20px}.tool-guide h2{font-size:21px}}

/* Compact workspace: keep actions close, expand guidance only when needed. */
aside#sidebar{width:222px;padding:20px 12px 14px}.shell{margin-left:222px}.brand{padding:0 8px 14px;font-size:22px}.navlabel{margin:14px 0 7px;padding:0 11px;font-size:11px}nav{gap:2px}.navitem{padding:7px 10px;min-height:36px;font-size:13px;gap:9px}.sidebottom{margin-top:18px;padding:14px 10px 0}.privacyicon{margin-bottom:6px}.sidebottom p{margin:7px 0;line-height:1.5}
header{height:60px;padding:0 28px}.headright{gap:16px}main{padding:24px 28px 12px;max-width:1220px}.titleline{gap:16px;margin-bottom:18px}.eyebrow{margin-bottom:7px;font-size:10px;letter-spacing:1.5px}h1{font-size:clamp(28px,3vw,36px);margin-bottom:7px;letter-spacing:-1px}.subtitle{font-size:14px;line-height:1.55;max-width:720px}.toolbadge{padding:6px 10px;font-size:12px}.workspace{gap:14px;grid-template-columns:minmax(0,1.65fr) minmax(280px,1fr)}.editor,.settings{border-radius:12px}.sectiontop{height:44px;padding:0 16px;font-size:13px}.step{font-size:10px;padding:3px}
.dropzone{min-height:210px;margin:16px;padding:18px;border-radius:11px}.uploadicon{width:44px;height:44px;border-radius:12px;font-size:26px;margin-bottom:3px}.dropzone h2{font-size:20px;margin:9px 0 3px}.dropzone p{font-size:13px;line-height:1.5;margin:4px 0 14px}.dropzone .small{margin-top:10px;font-size:11px}.primary{font-size:14px;padding:10px 18px;min-height:42px;border-radius:8px}.download{font-size:13px;padding:8px 12px;min-height:38px}.editorbottom{padding:0 16px 13px;gap:8px}.editorbottom>span{font-size:11px;line-height:1.45}
#controls{padding:14px 16px 10px}.controlgroup{margin-bottom:12px}.controlgroup label{font-size:13px;margin-bottom:6px;gap:8px}.controlgroup select,.controlgroup input[type=number],.controlgroup input[type=url]{font-size:13px;padding:8px 10px;min-height:38px}.controlgroup input[type=range]{min-height:24px;margin:0}.choice{padding:9px;margin:8px 0;gap:8px}.choice b,.choice span{font-size:12px}.choice span span{line-height:1.5}.notice{font-size:12px;padding:10px;line-height:1.6}.helptext{font-size:12px;line-height:1.6;margin-top:8px}.processarea{padding:0 16px 14px}#status{font-size:12px;margin-top:8px;line-height:1.5}.tapcontrols{margin-bottom:10px;gap:6px}
.control-tips{grid-column:1/-1;margin:4px 0 0;border-top:1px solid #2c3d55;padding-top:8px}.control-tips summary,.guide-disclosure summary,.quick-guides>summary{cursor:pointer;color:#b7c9e2;font-size:13px;font-weight:600;padding:7px 0;line-height:1.5}.control-tips summary:hover,.guide-disclosure summary:hover,.quick-guides>summary:hover{color:var(--green)}summary:focus-visible{outline:3px solid var(--green);outline-offset:3px;border-radius:4px}.control-tips .notice{margin-top:8px}#controls[data-control-tool=eq],#controls[data-control-tool=compress]{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));column-gap:16px}
#loaded{min-height:240px;padding:16px}.fileheading{gap:8px}.fileicon{width:34px;height:36px;font-size:20px}canvas{height:90px;margin:14px 0}audio{height:38px}#results{margin-top:20px}.resultheading h2{font-size:19px;margin:4px 0 12px}.resultrow{padding:12px;margin:8px 0;gap:12px;border-radius:10px}.resultnote{font-size:12px;margin-bottom:10px}.statrow{padding:16px;gap:16px}.statrow strong{font-size:26px}.stem-mixer{padding:16px;margin-bottom:14px;border-radius:12px}.stem-mixer h3{font-size:18px}.stem-mixer p{font-size:13px;line-height:1.55}.stem-channels{gap:9px;margin:12px 0}.stem-channel{padding:11px}.stem-channel b{margin-bottom:7px;font-size:14px}.stem-channel label{margin:7px 0;font-size:12px}.stem-channel button{font-size:12px;min-height:34px}
.guide-disclosure{margin:20px 0 12px;padding:7px 16px;border:1px solid #2c3d55;border-radius:10px;background:#111c2c}.tool-guide{margin:10px 0 4px;padding:0;border:0;background:none;border-radius:0}.tool-guide h2{font-size:20px}.tool-guide h3{font-size:15px;margin-top:16px}.tool-guide p,.tool-guide li{font-size:14px;line-height:1.65}.seo-links{gap:6px;padding-bottom:6px}.seo-links a{font-size:12px;padding:6px 9px;border-radius:6px}.ad-slot{min-height:70px;margin:16px 0 8px}.exploreheading{margin-top:20px;gap:12px}.exploreheading h2{font-size:18px;margin:10px 0}.toolcards{gap:10px;margin-top:6px}.toolcard{padding:14px;border-radius:10px}.cardicon{width:34px;height:34px;font-size:20px;margin-bottom:10px;border-radius:9px}.toolcard h3{font-size:15px;margin-bottom:5px}.toolcard p{font-size:12px;line-height:1.55}.toolcard .small{right:12px;top:16px;font-size:10px}.quick-guides{margin-top:20px;padding-top:8px}.guide-grid{gap:12px;margin-top:10px}.guide-grid article{padding:14px;border-radius:10px}.guide-grid h3{font-size:14px}.guide-grid p{font-size:13px;line-height:1.6}.infofooter{margin:20px 0 8px;padding-top:13px;gap:16px}.infofooter .textbutton{font-size:12px}footer{padding:14px 28px}
@media(max-width:1100px){main{padding:22px}.workspace{grid-template-columns:minmax(0,1.3fr) minmax(260px,1fr)}header{padding:0 22px}}
@media(max-width:800px){.shell{margin:0}header{height:54px;padding:0 14px}main{padding:18px 14px 10px}.titleline{margin-bottom:14px}h1{font-size:28px}.subtitle{font-size:13px}.workspace{grid-template-columns:1fr;gap:12px}.dropzone{min-height:190px;margin:12px;padding:14px}.sectiontop,.settings .sectiontop{height:42px;padding:0 14px}.dropzone h2{font-size:18px}.primary,.download,.navitem,.stem-channel button{min-height:44px}.navitem{padding:9px 10px}.controlgroup select,.controlgroup input[type=number],.controlgroup input[type=url]{min-height:42px}.controlgroup input[type=range]{min-height:30px}.control-tips summary,.guide-disclosure summary,.quick-guides>summary{min-height:44px;display:list-item;padding:12px 0}.editorbottom{padding:0 14px 10px}#loaded{min-height:220px;padding:14px}.stem-mixer{padding:12px}.resultrow{gap:10px}.guide-disclosure{margin-top:16px;padding:0 14px}.seo-links a{min-height:40px;display:flex;align-items:center}.toolcards{gap:8px}.toolcard{padding:12px}.toolcard .small{position:static;display:block;margin-bottom:6px}.cardicon{margin-bottom:8px}.infofooter{gap:12px}.infofooter .textbutton{min-height:44px}footer{padding:12px 14px}}
@media(max-width:380px){#controls[data-control-tool=compress]{grid-template-columns:1fr}.freebadge{font-size:10px;padding:5px 7px}}

/* Approved SurStudio equalizer identity. */
.brand{gap:8px;font-size:19px;letter-spacing:-.6px}.brand .brandmark{display:block;width:32px;height:32px;flex:0 0 32px;object-fit:contain}.brandname{white-space:nowrap}.brand .beta{font-size:8px;letter-spacing:.5px;padding:3px;margin-left:auto}

/* Interactive audio waveform: cached bars with a moving playback position. */
#waveform{cursor:crosshair;touch-action:pan-y;margin-bottom:6px}#waveform:focus-visible{outline:2px solid var(--green);outline-offset:3px}.waveform-meta{display:flex;justify-content:space-between;gap:12px;font-size:11px;color:#9caec8;line-height:1.5;margin-bottom:12px}.waveform-meta>span:first-child{font-variant-numeric:tabular-nums;white-space:nowrap;color:#78e9d9}@media(max-width:580px){.waveform-meta{font-size:10px;gap:8px}.waveform-meta>span:last-child{text-align:right;max-width:65%}}

.live-preview-panel{margin:0 16px 12px;padding:10px 12px;border:1px solid #39ead433;background:#39ead409;border-radius:9px}.live-preview-panel label{display:flex;align-items:center;gap:8px;font-size:13px;color:#d5eee9}.live-preview-panel input{accent-color:var(--green)}#liveState{margin-left:auto;font-size:10px;color:#7ddfd1}.live-preview-panel p{font-size:11px;line-height:1.55;color:#a4b9ce;margin:7px 0 0}

.article-nav-link{display:block;font-size:13px;color:#b7c9e2;padding:9px 10px;border-radius:8px}.article-nav-link:hover{color:var(--green);background:#39ead410}.header-articles-link{font-size:13px;color:#b7c9e2;white-space:nowrap;padding:7px 0}.header-articles-link:hover{color:var(--green)}@media(max-width:800px){.header-articles-link{font-size:12px}.shell .headright .freebadge{display:none}}

.studio-nav-link{display:flex;align-items:center;gap:12px;margin:16px 10px 10px;padding:12px 14px;border:1px solid #5ee9c377;border-radius:10px;background:linear-gradient(120deg,#5ee9c31c,#ab82ff18);color:#78f4d8;font-size:15px;font-weight:700}.studio-nav-link>span:first-child{font-size:24px}.studio-nav-link small{display:block;color:#b4bed6;font-size:12px;font-weight:400;margin-top:4px}.studio-nav-link:hover,.studio-header-link:hover{border-color:#bfa3ff;background:#5ee9c329}.studio-header-link{display:inline-flex;align-items:center;white-space:nowrap;border:1px solid #5ee9c377;border-radius:8px;padding:8px 12px;background:#5ee9c315;color:#78f4d8;font-size:14px;font-weight:700}.studio-nav-link:focus-visible,.studio-header-link:focus-visible{outline:2px solid #5ee9c3;outline-offset:3px}@media(max-width:600px){.headright{gap:8px}.studio-header-link{font-size:12px;padding:7px 8px}.headright .freebadge{display:none}}