/* Sangbók palette
   #13293D Deep Space Blue · #006494 Baltic Blue · #247BA0 Cerulean
   #1B98E0 Blue Bell · #E8F1F2 Alice Blue
   Blue is deliberately used as an accent, not as the page background. */
:root{
  --deep-space:#13293D;
  --baltic:#006494;
  --cerulean:#247BA0;
  --blue-bell:#1B98E0;
  --alice:#E8F1F2;

  --primary:#006494;
  --primary-hover:#247BA0;
  --primary-soft:color-mix(in srgb,#E8F1F2 72%,#ffffff);
  --bg:#ffffff;
  --surface:#ffffff;
  --surface-2:#f5f7f8;
  --text:#13293D;
  --muted:#66737d;
  --border:#dce3e6;
  --danger:#b42318;
  --shadow:0 10px 30px rgba(19,41,61,.10);
  --radius:12px;
  --pad:20px;
  --header-h:56px;
  --lyric-size:18px;

  /* Piano colors never change between light and dark mode. */
  --piano-white:#ffffff;
  --piano-black:#13293D;
  --piano-active:#1B98E0;
  --piano-outline:#13293D;
  color-scheme:light;
}
html.dark{
  --primary:#1B98E0;
  --primary-hover:#247BA0;
  --primary-soft:color-mix(in srgb,#E8F1F2 10%,#13293D);
  --bg:#111d28;
  --surface:#172633;
  --surface-2:#1c2d3a;
  --text:#f4f7f8;
  --muted:#aeb9c0;
  --border:#324452;
  --shadow:0 12px 34px rgba(0,0,0,.30);
  color-scheme:dark;
}
*{box-sizing:border-box}
html{font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:var(--bg);color:var(--text);scroll-behavior:smooth}
body{margin:0;min-height:100dvh;background:var(--bg);color:var(--text);-webkit-tap-highlight-color:transparent}
button,input,select,textarea{font:inherit}
a{color:inherit}
button{touch-action:manipulation}

.app-header{
  position:fixed;inset:0 0 auto 0;z-index:80;height:var(--header-h);
  display:flex;align-items:center;justify-content:space-between;padding:0 max(var(--pad),env(safe-area-inset-left));
  background:color-mix(in srgb,var(--bg) 96%,transparent);backdrop-filter:blur(12px);
  border-bottom:1px solid var(--border)
}
.song-site-header{position:relative;inset:auto;background:var(--bg);backdrop-filter:none}
.brand{position:absolute;left:50%;transform:translateX(-50%);font-weight:700;font-size:21px;letter-spacing:-.02em;text-decoration:none;color:var(--text)}
.header-actions{display:flex;align-items:center;margin-left:auto}
.icon-btn{width:44px;height:44px;flex:0 0 44px;border:0;background:transparent;color:var(--muted);border-radius:999px;display:grid;place-items:center;cursor:pointer;font-size:21px;transition:background-color .14s ease,color .14s ease}
.icon-btn:hover,.icon-btn:active{background:var(--surface-2);color:var(--text)}
.icon-btn svg{width:22px;height:22px;display:block}
/* No scale transform: controls never shrink when pressed. */

.menu-panel{position:fixed;z-index:100;left:12px;top:62px;width:min(240px,calc(100vw - 24px));display:none;padding:8px;background:var(--surface);border:1px solid var(--border);border-radius:14px;box-shadow:var(--shadow)}
.menu-panel.open{display:block}
.menu-panel>a{display:block;padding:12px 13px;border-radius:9px;text-decoration:none;color:var(--text)}
.menu-panel>a:hover,.menu-panel>a:active{background:var(--surface-2)}
.menu-language{margin-top:6px;padding:10px 8px 5px;border-top:1px solid var(--border)}
.menu-language>span{display:block;margin-bottom:8px;color:var(--muted);font-size:12px;font-weight:600;text-transform:uppercase;letter-spacing:.06em}
.language-switch{display:grid;grid-template-columns:repeat(3,1fr);gap:5px}
.language-switch .language-option{display:flex;align-items:center;justify-content:center;min-height:36px;padding:0;border:1px solid var(--border);border-radius:9px;text-decoration:none;color:var(--muted);font-size:13px;font-weight:700}
.language-switch .language-option.active{border-color:var(--primary);color:var(--primary);background:var(--primary-soft)}

.page{width:min(760px,100%);margin:0 auto;padding:calc(var(--header-h) + 22px) var(--pad) 44px}
.song-page{padding-top:14px}
.page-title{margin:0 0 20px;font-size:28px;line-height:1.15;letter-spacing:-.025em}
.muted{color:var(--muted)}
.small{font-size:13px}
.section{margin-top:31px}
.section:first-child{margin-top:0}
.section-head{display:flex;align-items:baseline;justify-content:space-between;gap:16px;margin-bottom:12px}
.section-head h2,.section h2{margin:0;font-size:20px;line-height:1.3;letter-spacing:-.01em}

.search-wrap{position:relative}
.search{width:100%;height:50px;padding:0 16px 0 44px;border:1px solid var(--border);border-radius:12px;background:var(--surface);color:var(--text);outline:none;box-shadow:0 1px 1px rgba(0,0,0,.02)}
.search:focus{border-color:var(--primary);box-shadow:0 0 0 3px color-mix(in srgb,var(--primary) 12%,transparent)}
.search-icon{position:absolute;left:15px;top:50%;transform:translateY(-50%);color:var(--muted);pointer-events:none}
.search-results{position:absolute;left:0;right:0;top:58px;z-index:60;background:var(--surface);border:1px solid var(--border);border-radius:13px;box-shadow:var(--shadow);overflow:hidden;display:none}
.search-results.open{display:block}
.search-result{display:block;width:100%;padding:13px 15px;text-decoration:none;border-bottom:1px solid var(--border)}
.search-result:last-child{border-bottom:0}
.search-result:hover,.search-result:active{background:var(--surface-2)}
.search-empty{padding:14px 15px;color:var(--muted)}

.song-list{border-top:1px solid var(--border)}
.song-row{width:100%;display:flex;align-items:center;gap:14px;padding:15px 2px;border:0;border-bottom:1px solid var(--border);background:transparent;color:inherit;text-decoration:none;text-align:left;cursor:pointer}
.song-row:hover .song-title{color:var(--primary)}
.song-info{display:flex;flex-direction:column;gap:5px;min-width:0;flex:1}
.song-title{display:block;font-size:17px;font-weight:600;line-height:1.25;letter-spacing:-.01em;overflow-wrap:anywhere}
.song-artist{display:block;font-size:14px;line-height:1.25;color:var(--muted);overflow-wrap:anywhere}
.rank{width:28px;flex:0 0 28px;color:var(--muted);font-weight:700;text-align:center}
.chevron{color:var(--muted);font-size:20px;flex:0 0 auto}

.quick-btn,.primary-btn,.secondary-btn,.pill,.tool-toggle{display:inline-flex;align-items:center;justify-content:center;min-height:44px;border-radius:11px;padding:0 15px;border:1px solid var(--border);text-decoration:none;cursor:pointer;font-weight:600}
.quick-btn{width:100%;height:50px;background:var(--surface);color:var(--text)}
.quick-btn:hover,.quick-btn:active{border-color:var(--primary);color:var(--primary)}
.primary-btn{background:var(--primary);border-color:var(--primary);color:#fff}
.primary-btn:hover,.primary-btn:active{background:var(--primary-hover);border-color:var(--primary-hover)}
.secondary-btn,.pill,.tool-toggle{background:var(--surface);color:var(--text)}
.pill{min-height:34px;border-radius:999px;font-size:13px;padding:0 11px;font-weight:500}

.az{position:sticky;top:var(--header-h);z-index:20;margin:18px 0 0;padding:8px 2px 6px;background:color-mix(in srgb,var(--bg) 96%,transparent);backdrop-filter:blur(8px);font-size:12px;font-weight:700;letter-spacing:.08em;color:var(--muted);border-bottom:1px solid var(--border)}

/* Song page */
.song-hero{padding:7px 0 18px}
.song-hero h1{margin:0 0 9px;font-size:30px;line-height:1.12;letter-spacing:-.03em}
.song-hero .song-artist-large{display:block;font-size:15px;color:var(--muted);line-height:1.35}
.song-controls{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:18px}
.transpose{display:flex;align-items:center;height:40px;border:1px solid var(--border);border-radius:999px;background:var(--surface);overflow:hidden}
.transpose>button{height:100%;border:0;background:transparent;cursor:pointer}
.transpose>[data-transpose-down],.transpose>[data-transpose-up]{width:42px;color:var(--primary);font-size:21px}
.transpose>button:hover,.transpose>button:active{background:var(--surface-2)}
.transpose-reset{width:42px;min-width:42px;color:var(--text);font-size:14px;font-weight:700;border-left:1px solid var(--border)!important;border-right:1px solid var(--border)!important}
.transpose-reset span{display:block;width:100%;text-align:center}
.instrument{display:flex;align-items:center;padding:3px;border:1px solid var(--border);border-radius:999px;background:var(--surface)}
.instrument button{min-height:34px;padding:0 14px;border:0;border-radius:999px;background:transparent;color:var(--muted);cursor:pointer;font-size:13px;font-weight:600}
.instrument button.active{background:var(--primary-soft);color:var(--primary)}

.song-tool-row{display:flex;align-items:center;flex-wrap:wrap;gap:8px;margin-top:10px}
.tool-toggle{min-height:38px;border-radius:999px;padding:0 12px;font-size:13px;font-weight:600}
.tool-toggle.active{border-color:color-mix(in srgb,var(--primary) 55%,var(--border));background:var(--primary-soft);color:var(--primary)}
.autoscroll-controls{display:flex;align-items:center;gap:6px;flex-wrap:nowrap}
.autoscroll-speed{height:38px;display:flex;align-items:center;border:1px solid var(--border);border-radius:999px;background:var(--surface);overflow:hidden}
.autoscroll-speed button{width:34px;height:100%;border:0;background:transparent;color:var(--muted);cursor:pointer;font-size:18px}
.autoscroll-speed button:hover{background:var(--surface-2);color:var(--text)}
.autoscroll-speed output{width:26px;text-align:center;font-size:12px;font-weight:700;color:var(--muted)}

.chord-dock{
  --chord-scale:1;
  position:sticky;top:0;z-index:70;
  margin-inline:calc(var(--pad) * -1);
  background:color-mix(in srgb,var(--bg) 97%,transparent);backdrop-filter:blur(13px);
  border:0;border-bottom:1px solid var(--border)
}
.chord-dock-toolbar{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:7px var(--pad) 3px}
.chord-dock-hint{font-size:12px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.chord-dock-actions{display:flex;gap:6px;flex:0 0 auto}
.chord-strip-viewport{overflow-x:auto;overflow-y:hidden;-webkit-overflow-scrolling:touch;overscroll-behavior-x:contain;touch-action:pan-x}
.chord-strip-viewport::-webkit-scrollbar{display:none}
.chord-strip{display:flex;align-items:flex-start;gap:calc(14px * var(--chord-scale));width:max-content;padding:7px var(--pad) 12px}
.diagram{flex:0 0 auto;width:calc(76px * var(--chord-scale));text-align:center;font-family:"JetBrains Mono",ui-monospace,monospace}
.diagram-name{height:calc(22px * var(--chord-scale));display:flex;align-items:center;justify-content:center;color:var(--primary);font-size:calc(14px * var(--chord-scale));font-weight:700;white-space:nowrap}
.guitar-diagram{display:block;width:calc(60px * var(--chord-scale));height:calc(82px * var(--chord-scale));margin:0 auto;color:var(--text)}
.piano-diagram{display:block;width:calc(118px * var(--chord-scale));height:calc(66px * var(--chord-scale));margin:0 auto}
.diagram.piano{width:calc(130px * var(--chord-scale))}
.diagram-notes{margin-top:4px;font-family:Inter,system-ui,sans-serif;font-size:calc(10px * var(--chord-scale));line-height:1.2;color:var(--muted);white-space:nowrap}
.diagram-unavailable{display:flex;align-items:center;justify-content:center;width:calc(66px * var(--chord-scale));height:calc(74px * var(--chord-scale));margin:auto;border:1px dashed var(--border);border-radius:9px;color:var(--muted);font-family:Inter,system-ui,sans-serif;font-size:calc(10px * var(--chord-scale));line-height:1.2;padding:5px}
.chord-dock.collapsed{border-bottom-color:transparent;backdrop-filter:none;background:transparent}
.chord-dock.collapsed .chord-strip-viewport,.chord-dock.collapsed .chord-dock-hint{display:none}
.chord-dock.collapsed .chord-dock-toolbar{justify-content:flex-end;padding-bottom:0}

.lyrics{padding-top:26px;padding-bottom:70px;font-size:var(--lyric-size);line-height:1.62}
.song-section-label{margin:29px 0 12px;font-size:12px;line-height:1;font-weight:700;letter-spacing:.10em;color:var(--muted);text-transform:uppercase}
.lyric-line{display:flex;flex-wrap:wrap;align-items:flex-start;min-height:31px;margin-bottom:8px}
.lyric-word{display:inline-flex;flex-direction:column;align-items:flex-start;margin-right:.28em;min-width:.35em}
.lyric-word .chord{min-height:1.25em;font-family:"JetBrains Mono",ui-monospace,monospace;font-size:14px;line-height:1.25;font-weight:700;color:var(--primary);white-space:nowrap}
.lyric-word .word{line-height:1.5;white-space:nowrap}
.lyric-spacer{height:10px}
.chord-only-line{display:flex;flex-wrap:wrap;gap:18px;margin:2px 0 14px;font-family:"JetBrains Mono",ui-monospace,monospace;font-weight:700;color:var(--primary)}
.lyric-chord{cursor:help;border-radius:3px;outline:none}
.lyric-chord:hover,.lyric-chord:focus-visible{text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:3px}

.chord-preview{position:fixed;z-index:180;min-width:112px;max-width:min(230px,calc(100vw - 16px));padding:10px 12px;background:var(--surface);border:1px solid var(--border);border-radius:13px;box-shadow:var(--shadow);text-align:center;pointer-events:none}
.chord-preview[hidden]{display:none}
.chord-preview-name{margin-bottom:5px;color:var(--primary);font-family:"JetBrains Mono",ui-monospace,monospace;font-size:14px;font-weight:700}
.chord-preview .guitar-diagram{width:82px;height:auto}
.chord-preview .piano-diagram{width:190px;height:auto;max-width:100%}
.chord-preview .diagram-unavailable{width:110px;height:72px}

/* Chord library / chord page */
.chord-group{margin-top:25px}
.chord-group h2{margin:0 0 9px;padding-bottom:8px;border-bottom:1px solid var(--border);font-size:16px;color:var(--muted)}
.chord-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}
.chord-cell{height:48px;display:flex;align-items:center;justify-content:center;border:1px solid var(--border);border-radius:10px;background:var(--surface);font-family:"JetBrains Mono",ui-monospace,monospace;font-weight:700;text-decoration:none}
.chord-cell:hover,.chord-cell:active{border-color:var(--primary);color:var(--primary);background:var(--primary-soft)}
.chord-detail{text-align:center}
.chord-detail h1{margin:0 0 18px;font-size:32px}
.chord-display{margin-top:18px;display:grid;place-items:center;min-height:290px;padding:24px;background:var(--surface);border:1px solid var(--border);border-radius:16px}
.chord-display .guitar-diagram{width:min(230px,64vw);height:auto}
.chord-display .piano-diagram{width:min(420px,88vw);height:auto}
.chord-note-list{margin-top:16px;color:var(--muted)}

.settings-list{display:grid;gap:0;border-top:1px solid var(--border)}
.setting{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:15px 0;border-bottom:1px solid var(--border)}
.setting-text{display:flex;flex-direction:column;gap:3px}
.setting label{font-weight:600}
.setting small{color:var(--muted)}
select,input[type="range"]{accent-color:var(--primary)}
select{min-height:40px;max-width:48%;padding:0 10px;border:1px solid var(--border);border-radius:10px;background:var(--surface);color:var(--text)}
.about-copy{font-size:17px;line-height:1.65}
.action-list{display:grid;gap:10px;margin-top:22px}
.notice{padding:12px 14px;border:1px solid var(--border);border-radius:11px;background:var(--surface-2);color:var(--muted);font-size:14px;line-height:1.45}
.error{color:var(--danger)}
.toast{position:fixed;z-index:220;left:50%;bottom:22px;transform:translate(-50%,14px);opacity:0;pointer-events:none;padding:10px 14px;border-radius:999px;background:var(--text);color:var(--bg);font-size:13px;font-weight:600;box-shadow:var(--shadow);transition:opacity .18s ease,transform .18s ease}
.toast.show{opacity:1;transform:translate(-50%,0)}

@media (min-width:800px){
  :root{--header-h:64px}
  .page{padding-bottom:50px}
  .chord-grid{grid-template-columns:repeat(6,1fr)}
  .song-page{padding-top:20px}
  .chord-dock{margin-inline:0}
  .lyrics{font-size:calc(var(--lyric-size) + 1px)}
}

@media (max-width:520px){
  .page{padding-inline:16px}
  :root{--pad:16px}
  .song-controls{display:grid;grid-template-columns:126px minmax(132px,1fr);align-items:center;gap:8px}
  .transpose{width:126px;min-width:126px}
  .instrument{width:100%;min-width:0}
  .instrument button{flex:1 1 0;min-width:0;padding:0 8px;white-space:nowrap}
  .song-tool-row{align-items:stretch}
  .tool-toggle{min-width:0}
  .autoscroll-controls{max-width:100%}
  .chord-dock-hint{max-width:calc(100vw - 145px)}
  .setting{align-items:flex-start}
}

@media (max-width:350px){
  .song-controls{grid-template-columns:1fr}
  .transpose{width:126px}
  .instrument{width:150px}
  .song-tool-row{flex-direction:column;align-items:flex-start}
}