@import url("https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Libre+Baskerville:wght@400;700&display=swap");

:root {
  --bg: #0b0d0d;
  --panel: #0e1010;
  --surface: #151918;
  --surface-2: #191d1c;
  --line: #272c2a;
  --line-strong: #373e3a;
  --text: #f1f5f2;
  --muted: #9ca59f;
  --faint: #68716c;
  --accent: #54e7a2;
  --accent-strong: #38c98b;
  --accent-soft: #143126;
  --danger: #ff8585;
  --danger-soft: #2c1719;
  --shadow: 0 28px 90px rgba(0, 0, 0, 0.42);
  color-scheme: dark;
}

:root[data-theme="light"] {
  --bg: #f6f7f5;
  --panel: #f6f7f5;
  --surface: #ffffff;
  --surface-2: #f4f6f3;
  --line: #dde1dc;
  --line-strong: #cbd1ca;
  --text: #151817;
  --muted: #6d746f;
  --faint: #929a94;
  --accent: #35d28b;
  --accent-strong: #168e5d;
  --accent-soft: #e2f9ee;
  --danger: #d65858;
  --danger-soft: #fff0f0;
  --shadow: 0 22px 70px rgba(22, 35, 27, .1);
  color-scheme: light;
}

* { box-sizing: border-box; }
html { min-height: 100%; }
body { margin: 0; min-height: 100vh; background: var(--bg); color: var(--text); font: 14px/1.5 Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; letter-spacing: -.01em; }
button, input, textarea { color: inherit; font: inherit; }
button { cursor: pointer; }
button:focus-visible, input:focus-visible, textarea:focus-visible, summary:focus-visible, #filebtn:focus-within, #alts span:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
[hidden] { display: none !important; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; }

.app-shell { min-height: 100vh; min-height: 100dvh; display: flex; flex-direction: column; background: radial-gradient(circle at 50% 36%, rgba(84, 231, 162, .035), transparent 40%), var(--panel); }
.work-view { display: flex; width: min(100% - 48px, 920px); min-height: 100vh; min-height: 100dvh; flex: 1; flex-direction: column; margin: 0 auto; padding: 22px 0 16px; }
.theme-toggle { position: absolute; top: 18px; right: clamp(16px, 3vw, 42px); z-index: 4; display: grid; width: 35px; height: 35px; place-items: center; border: 1px solid var(--line); border-radius: 9px; background: var(--surface); color: var(--muted); cursor: pointer; box-shadow: 0 4px 18px rgba(0, 0, 0, .08); }
.theme-toggle:hover { border-color: var(--accent-strong); color: var(--text); }
.theme-toggle svg { width: 17px; height: 17px; }
.theme-toggle .moon-icon, :root[data-theme="light"] .theme-toggle .sun-icon { display: none; }
:root[data-theme="light"] .theme-toggle .moon-icon { display: block; }
.page-heading { margin-bottom: 16px; text-align: center; }
.page-title { margin: 0; color: var(--text); font: 400 clamp(20px, 2.2vw, 26px)/1.35 "Libre Baskerville", "Bodoni 72", Didot, Georgia, serif; letter-spacing: -.025em; text-wrap: balance; }
.page-subtitle { margin: 4px 0 0; color: var(--muted); font-size: 13px; }
.field-label { display: block; color: var(--accent-strong); font-size: 10px; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; }

.composer { position: relative; padding: 19px 20px 12px; border: 1px solid var(--line-strong); border-radius: 17px; background: var(--surface); box-shadow: var(--shadow); transition: border-color 160ms ease, box-shadow 160ms ease; }
.composer:focus-within { border-color: rgba(84, 231, 162, .6); box-shadow: var(--shadow), 0 0 0 3px rgba(84, 231, 162, .06); }
.field-label { margin-bottom: 12px; color: var(--faint); }
#q { display: block; width: 100%; padding: 2px 0 14px; border: 0; outline: 0; background: transparent; font-size: 18px; line-height: 1.4; }
#q::placeholder { color: var(--faint); opacity: 1; }
.composer-footer { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; padding-top: 10px; border-top: 1px solid var(--line); color: var(--faint); font-size: 11px; }
.data-controls { min-width: 0; flex: 1; }
.add-data-button { display: inline-flex; min-height: 34px; align-items: center; gap: 4px; padding: 6px 8px; border: 0; border-radius: 7px; background: transparent; color: var(--muted); cursor: pointer; font-size: 11px; font-weight: 600; }
.add-data-button:hover { background: var(--surface-2); color: var(--accent); }
.add-data-button span { font-size: 16px; font-weight: 400; line-height: 1; }
.composer-activity { display: grid; width: 22px; height: 22px; flex: 0 0 22px; place-items: center; margin-top: 5px; }
.composer-spark { color: var(--accent); font-size: 17px; line-height: 1; }
.composer-spinner { display: none; width: 18px; height: 18px; border: 2px solid var(--line-strong); border-top-color: var(--accent); border-radius: 50%; animation: composer-spin .75s linear infinite; }
body[data-qv-phase="refining"] .composer-spark,
body:has(.preview-panel[data-loading]) .composer-spark { display: none; }
body[data-qv-phase="refining"] .composer-spinner,
body:has(.preview-panel[data-loading]) .composer-spinner { display: block; }
.qv-refining { display: none !important; }
@keyframes composer-spin { to { transform: rotate(360deg); } }

.preview-panel { display: flex; min-height: 0; flex: 1; flex-direction: column; margin-top: 14px; }
#datactl { display: flex; align-items: center; gap: 8px; }
.control-button, #demos button, #cycle button { display: inline-flex; align-items: center; justify-content: center; min-height: 34px; padding: 0 11px; border: 1px solid var(--line-strong); border-radius: 8px; background: var(--surface-2); color: var(--text); font-size: 11px; font-weight: 600; text-decoration: none; transition: border-color 150ms ease, background 150ms ease, color 150ms ease; }
.control-button:hover, #demos button:hover, #cycle button:hover { border-color: var(--accent-strong); background: var(--accent-soft); color: var(--accent); }
#filebtn { cursor: pointer; }
body.using-demo #clear { display: none !important; }

#cached { padding: 4px 8px; border: 1px solid rgba(84, 231, 162, .2); border-radius: 6px; background: var(--accent-soft); color: var(--accent); font-size: 10px; font-weight: 600; white-space: nowrap; }
#demos { margin: 12px 0 0; color: var(--faint); font-size: 11px; text-align: center; }
#demos button { min-height: 29px; margin: 0 4px 5px; padding: 0 9px; font-size: 10px; }
.result-context { color: var(--muted); }
#meta { color: var(--muted); font-size: 11px; line-height: 1.5; overflow-wrap: anywhere; }
#meta:empty, #alts:empty, #err:empty { display: none; }
#meta b { color: var(--text); font-weight: 650; }
#alts { margin-top: 9px; }
#alts span { display: inline-block; margin: 0 6px 6px 0; padding: 4px 9px; border: 1px solid var(--line-strong); border-radius: 7px; background: var(--surface-2); color: var(--muted); cursor: pointer; font-size: 11px; }
#alts span:hover { border-color: var(--accent-strong); color: var(--accent); }
.preview-panel:has(#chart:not(:empty)) #meta, .preview-panel:has(#chart:not(:empty)) #alts { display: none; }
#err { margin: 10px 0; padding: 10px 12px; border: 1px solid rgba(255, 133, 133, .25); border-radius: 8px; background: var(--danger-soft); color: var(--danger); font-size: 11px; }
.chart-stage { position: relative; display: flex; min-width: 0; min-height: 420px; flex: 1; }
.chart-frame { position: relative; display: flex; min-width: 0; min-height: 420px; flex: 1; overflow: hidden; border: 1px solid var(--line-strong); border-radius: 10px; background: #fff; }
#chart-tabs { position: absolute; top: 16px; left: calc(100% - 1px); z-index: 2; display: flex; width: 154px; flex-direction: column; gap: 5px; }
#chart-tabs button { display: block; width: 100%; min-height: 38px; padding: 7px 12px; border: 1px solid var(--line-strong); border-left: 0; border-radius: 0 9px 9px 0; background: var(--surface); color: var(--muted); cursor: pointer; font-size: 11px; font-weight: 600; text-align: left; text-transform: capitalize; }
#chart-tabs button:hover { background: var(--surface-2); color: var(--text); }
#chart-tabs button.active { margin-left: -1px; border-color: var(--line-strong); border-left: 1px solid #fff; background: #fff; color: #151817; box-shadow: 5px 5px 18px rgba(0, 0, 0, .09); }
#chart, svg.qv-chart { position: absolute; inset: 0; display: block; width: 100%; height: 100%; background: #fff; overflow: visible; }
.chart-frame:has(#chart:empty) { border-style: dashed; background: var(--surface-2); }
#chart:empty { display: none; }
.result-context:has(#cached:not([hidden]), #err:not(:empty)) + .chart-stage,
.preview-panel:has(#chart:empty) .result-context:has(#meta:not(:empty), #alts:not(:empty)) + .chart-stage { margin-top: 10px; }
.title-loading { display: none; }
.preview-panel[data-loading="chart"] .chart-frame { border-style: dashed; background: var(--surface-2); }
.preview-panel[data-loading="chart"] #chart { visibility: hidden; }
.skeleton { display: block; border-radius: 5px; background: linear-gradient(90deg, #e9eeec 25%, #f5f7f6 48%, #e9eeec 72%); background-size: 220% 100%; animation: shimmer 1.6s ease-in-out infinite; }
.preview-panel[data-loading="title"] .chart-frame:not(:has(.qv-title:not(:empty))) #chart:not(:empty) ~ .title-loading { position: absolute; top: 9px; left: 10px; z-index: 1; display: flex; width: min(46%, 330px); height: 27px; align-items: center; padding: 3px 7px; background: #fff; }
.title-loading .skeleton { width: 100%; height: 17px; }
@keyframes shimmer { to { background-position-x: -220%; } }
.preview-footer { display: flex; align-items: center; justify-content: center; gap: 12px; min-height: 42px; margin-top: 14px; }
#cycle, #actions { display: flex; align-items: center; flex-wrap: wrap; gap: 7px; }
#cycle { display: none; color: var(--muted); font-size: 11px; }
#cycle button { min-width: 34px; padding: 0 8px; font-size: 16px; }
#actions { min-width: 232px; min-height: 34px; justify-content: center; }
#actions .control-button:first-child:not([hidden]) { border-color: transparent; background: var(--accent); color: #062215; }
#actions .control-button:first-child:not([hidden]):hover { background: var(--accent-strong); }

@media (max-width: 1240px) {
  #chart-tabs { position: static; flex: 0 0 154px; align-self: flex-start; margin-left: -1px; }
}

@media (max-width: 760px) {
  .chart-stage { flex-direction: column; }
  #chart-tabs { width: 100%; flex: 0 0 auto; flex-direction: row; align-self: auto; gap: 5px; margin: -1px 0 0; overflow-x: auto; }
  #chart-tabs button { width: auto; flex: 0 0 auto; border: 1px solid var(--line-strong); border-top: 0; border-radius: 0 0 9px 9px; white-space: nowrap; }
  #chart-tabs button.active { margin-left: 0; border-left: 1px solid var(--line-strong); border-top: 1px solid #fff; }
}

@media (max-width: 650px) {
  .work-view { width: min(100% - 28px, 920px); padding-top: 16px; }
  .page-heading { margin-bottom: 14px; padding-inline: 38px; }
  .theme-toggle { top: 14px; right: 14px; }
  .page-title { font-size: 20px; }
  .page-subtitle { font-size: 12px; }
  .composer { padding: 16px 16px 12px; }
  #q { font-size: 16px; }
  .chart-frame { overflow-x: auto; }
  #chart, svg.qv-chart { min-width: 560px; }
  .preview-footer { align-items: center; flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; }
  .skeleton { animation: none; }
}