/* OpenTokenUsage site. Dark (pure black) is the default; light follows the system. */

:root {
  --bg: #000000;
  --surface: #0B0B0B;
  --surface-2: #1A1A1A;
  --text: #FFFFFF;
  --muted: #C5C5C5;
  --line: #262626;
  --frame: #3D3D3D;
  --accent: #2D9CFF;
  --on-accent: #000000;
  --taskbar: #1C1C1C;
  --tb-hover: #2B2B2B;
  --tb-line: #262626;

  /* The app's heat scale at these usage levels */
  --u12: #FEF1C1;
  --u34: #FBD84E;
  --u41: #FAD12A;
  --u58: #FAB326;
  --u62: #FBAB2B;
  --u100: #F87171;

  --f-display: "Segoe UI Variable Display", "Segoe UI", system-ui, sans-serif;
  --f-text: "Segoe UI Variable Text", "Segoe UI", system-ui, sans-serif;
  --f-small: "Segoe UI Variable Small", "Segoe UI", system-ui, sans-serif;
  --f-code: "Cascadia Code", "Cascadia Mono", Consolas, monospace;

  --g: 16px;
  --section: 48px;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #F3F3F3;
    --surface: #FFFFFF;
    --surface-2: #F9F9F9;
    --text: #1A1A1A;
    --muted: #5D5D5D;
    --line: #E0E0E0;
    --frame: #CFCFCF;
    --accent: #0058C8;
    --on-accent: #FFFFFF;
    --taskbar: #E4E4E4; /* dark enough to stand apart from the #F3F3F3 page */
    --tb-hover: #F9F9F9; /* lighter, like a Windows 11 light taskbar */
    --tb-line: #CFCFCF;

    /* Darkened to 4.5:1 on the light taskbar (#E4E4E4) */
    --u12: #1A1A1A;
    --u34: #756524;
    --u41: #786514;
    --u58: #855F14;
    --u62: #895D18;
    --u100: #B91C1C;
  }
}

/* Base */

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 400 1.0625rem/1.55 var(--f-text);
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3, p, ul, dl, dd, figure { margin: 0; }
p, dd { text-wrap: pretty; }
img { display: block; max-width: 100%; height: auto; }
a { color: var(--accent); text-decoration: underline; text-underline-offset: 0.15em; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--text); outline-offset: 2px; }
.sr-only {
  position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.wrap { max-width: calc(1120px + 2 * var(--g)); margin-inline: auto; padding-inline: var(--g); }

/* Header */

.site-header { display: flex; align-items: center; justify-content: space-between; height: 56px; }
.brand { display: flex; align-items: center; gap: 8px; font-weight: 600; font-size: 1rem; }
a.plain { color: var(--text); text-decoration: none; font-size: 0.9375rem; font-weight: 600; }
a.plain:hover { text-decoration: underline; }

/* Type */

h1 {
  font: 600 clamp(2.5rem, 1.6rem + 3.6vw, 4rem)/1.05 var(--f-display);
  letter-spacing: -0.02em;
  text-wrap: balance;
  max-width: 12em; /* always two lines on wide screens */
}
h2 {
  font: 600 clamp(1.625rem, 1.2rem + 1.4vw, 2.125rem)/1.2 var(--f-display);
  text-wrap: balance;
  max-width: 40rem;
}
h2 .sent { display: inline-block; } /* each sentence stays whole */
h3 { font: 600 0.875rem/1.4 var(--f-text); margin: 40px 0 12px; }
[lang="ja"], [lang="ko"], [lang="zh-Hans"] { white-space: nowrap; }
.intro, .after, .more { margin-top: 12px; max-width: 62ch; }
.intro { color: var(--muted); }

/* Buttons */

.btn, .btn-accent {
  display: inline-flex; align-items: center; justify-content: center;
  height: 32px; padding: 0 16px;
  border: 1px solid transparent; border-radius: 4px;
  font: 600 14px/1 var(--f-text);
  text-decoration: none; cursor: pointer; white-space: nowrap;
  transition: background-color 83ms linear;
}
.btn-accent { min-width: 6.5em; background: var(--accent); color: var(--on-accent); }
.btn-accent:hover { background: color-mix(in srgb, var(--accent) 90%, #000); }
.btn-accent:active { background: color-mix(in srgb, var(--accent) 80%, #000); }
/* Copy buttons ship hidden and site.js reveals them; the space is kept so nothing shifts. */
.btn-accent[hidden] { visibility: hidden; }
.btn { background: var(--surface); color: var(--text); border-color: var(--frame); }
.btn:hover { background: var(--surface-2); }

/* Install block */

.install {
  display: flex; align-items: center; gap: 8px;
  max-width: 34rem; margin-top: 32px; padding: 6px 6px 6px 16px;
  background: var(--surface); border: 1px solid var(--frame); border-radius: 4px;
}
.cmd {
  flex: 1; min-width: 0;
  font: 400 0.9375rem/1.4 var(--f-code);
  overflow-wrap: break-word;
  -webkit-user-select: all; user-select: all;
}
.install .btn-accent { padding: 0 12px; }
#install .install { margin-top: 20px; }
.after { margin-top: 20px; }

/* Hero */

.hero-top { display: grid; grid-template-columns: minmax(0, 1fr); padding: 32px var(--g) 12px; }
.sub {
  margin-top: 20px; max-width: 36rem;
  font-size: 1.125rem; line-height: 1.45; color: var(--muted);
}
.actions { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 20px; margin-top: 16px; }
.meta { margin-top: 16px; font-size: 0.875rem; color: var(--muted); }

.flyout {
  justify-self: end;
  width: min(100%, 320px);
  margin: 32px -8px 0 0; /* 8px from the viewport edge, above the tray */
  border: 1px solid var(--frame); border-radius: 8px; overflow: hidden;
  box-shadow: 0 8px 32px rgb(0 0 0 / 0.28);
  animation: rise 267ms cubic-bezier(0.1, 0.9, 0.2, 1) backwards;
}
.flyout img { width: 100%; }
.flyout.is-closed { visibility: hidden; animation: none; }

/* Taskbar */

.taskbar {
  position: relative;
  display: flex; align-items: center; justify-content: safe flex-end; gap: 4px;
  min-height: 48px; padding: 0 4px;
  background: var(--taskbar); border-top: 1px solid var(--tb-line);
  font: 600 0.75rem/1.15 var(--f-small);
  font-variant-numeric: tabular-nums;
  color: var(--text);
}
/* Start, search and app placeholders, centred like Windows 11; only where they clear the tray */
.tb-apps { display: none; }
.strip {
  display: flex; align-items: center; gap: 12px;
  min-height: 40px; padding: 0 8px;
  border: 0; border-radius: 4px; background: transparent;
  color: inherit; font: inherit; cursor: pointer;
  transition: background-color 83ms linear;
}
.strip:hover { background: var(--tb-hover); }
.si { display: flex; align-items: center; gap: 6px; text-align: left; }
.nums { display: flex; flex-direction: column; }
.ti { display: flex; align-items: center; gap: 12px; padding: 0 8px; height: 40px; }
.ti img { width: 16px; height: 16px; max-width: none; } /* never squeezed to nothing on narrow screens */
.clock {
  display: flex; flex-direction: column; align-items: flex-end;
  min-width: 4.5rem; padding: 0 8px; font-weight: 400;
}

.u12 { color: var(--u12); }
.u34 { color: var(--u34); }
.u41 { color: var(--u41); }
.u58 { color: var(--u58); }
.u62 { color: var(--u62); }
.u100 { color: var(--u100); }

/* Provider icons: masks, so icons drawn in currentColor show on black */

.pi {
  flex: none; display: block; width: 16px; height: 16px;
  background: var(--brand, var(--text));
  -webkit-mask: var(--icon) center / contain no-repeat;
  mask: var(--icon) center / contain no-repeat;
}
.p-amp { --brand: #F34E3F; --icon: url(providers/amp.svg); }
.p-antigravity { --brand: #4285F4; --icon: url(providers/antigravity.svg); }
.p-claude { --brand: #DE7356; --icon: url(providers/claude.svg); }
.p-codex { --brand: #74AA9C; --icon: url(providers/codex.svg); }
.p-copilot { --brand: #A855F7; --icon: url(providers/copilot.svg); }
.p-cursor { --icon: url(providers/cursor.svg); }
.p-devin { --icon: url(providers/devin.svg); }
.p-factory { --icon: url(providers/factory.svg); }
.p-grok { --icon: url(providers/grok.svg); }
.p-jetbrains-ai-assistant { --brand: #7D5FE6; --icon: url(providers/jetbrains-ai-assistant.svg); }
.p-kimi { --icon: url(providers/kimi.svg); }
.p-kiro { --brand: #C09CFF; --icon: url(providers/kiro.svg); }
.p-minimax { --brand: #F5433C; --icon: url(providers/minimax.svg); }
.p-opencode-go { --icon: url(providers/opencode-go.svg); }
.p-synthetic { --icon: url(providers/synthetic.svg); }
.p-zai { --icon: url(providers/zai.svg); }
@media (prefers-color-scheme: light) {
  /* 3:1 on the light taskbar (#E4E4E4) and the page */
  .p-claude { --brand: #C6664D; }
  .p-codex { --brand: #5E8A7E; }
  .p-kiro { --brand: #9578C6; }
}
/* Contrast themes paint backgrounds as Canvas, which would erase the mask icons */
@media (forced-colors: active) {
  .pi { forced-color-adjust: none; background: CanvasText; }
  .strip { border: 1px solid transparent; }
}

/* Sections */

main section:not(.hero) { padding-top: var(--section); }
#install { padding-bottom: var(--section); }

.anatomy { display: grid; gap: 32px; margin-top: 32px; }
.slab {
  display: flex; align-items: center; justify-content: center;
  padding: 32px 40px;
  background: var(--taskbar); border: 1px solid var(--tb-line); border-radius: 8px;
}
.si.big { gap: 16px; }
.si.big .pi { width: 48px; height: 48px; }
.si.big .nums { font: 600 2.25rem/1.1 var(--f-display); font-variant-numeric: tabular-nums; }
.defs { display: grid; gap: 16px; max-width: 36rem; }
.defs dt { font-weight: 600; }
.defs dd { color: var(--muted); font-size: 0.9375rem; line-height: 1.5; }

.rows { list-style: none; padding: 0; display: grid; gap: 2px; max-width: 45rem; }
.rows li {
  display: grid; grid-template-columns: 1fr; row-gap: 4px;
  padding: 14px 16px;
  background: var(--surface); border: 1px solid var(--line); border-radius: 4px;
}
.intro + .rows, h2 + .rows { margin-top: 32px; }
.rt { font-weight: 600; font-size: 1rem; line-height: 1.4; }
.rd { font-size: 0.875rem; line-height: 1.45; color: var(--muted); }
.val { font-size: 0.875rem; line-height: 1.45; color: var(--muted); font-variant-numeric: tabular-nums; }
/* Plain hairline lists where there is no setting value to show */
.rows.flat { gap: 0; }
.rows.flat li { padding: 12px 0; background: none; border: 0; border-bottom: 1px solid var(--line); border-radius: 0; }
.faq h3 { margin: 0 0 4px; }
.faq .rd { font-size: 0.9375rem; line-height: 1.5; max-width: 62ch; }

.yours-grid { display: grid; gap: 40px; }
.shot { border-radius: 8px; }

.providers { list-style: none; padding: 0; display: grid; margin-top: 32px; }
.providers li {
  display: grid; grid-template-columns: 20px 1fr; gap: 12px;
  padding: 12px 0; border-bottom: 1px solid var(--line);
}
.providers .pi { width: 20px; height: 20px; margin-top: 3px; }
.pn { font-weight: 600; }
.pt { font-size: 0.875rem; line-height: 1.45; color: var(--muted); }
.more { margin-top: 24px; }
.fine { margin-top: 8px; font-size: 0.875rem; color: var(--muted); }

/* Footer */

.site-footer {
  border-top: 1px solid var(--line);
  padding: 32px 0 48px;
  font-size: 0.875rem; line-height: 1.5; color: var(--muted);
}
.site-footer .brand { font-size: 0.875rem; color: var(--text); }
.foot-row {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
  gap: 12px 24px; margin-bottom: 16px;
}
.site-footer nav { display: flex; flex-wrap: wrap; gap: 4px 20px; }
.site-footer a { color: inherit; }
.site-footer nav a { text-decoration: none; }
.site-footer nav a:hover { text-decoration: underline; }
.site-footer p + p { margin-top: 6px; }
button.link { padding: 0; border: 0; background: none; color: inherit; font: inherit; text-decoration: underline; cursor: pointer; }

/* Analytics question, shaped like a Windows 11 notification */

.consent {
  position: fixed; z-index: 10; left: var(--g); right: var(--g); bottom: var(--g);
  display: grid; gap: 12px; padding: 16px;
  background: var(--surface); border: 1px solid var(--frame); border-radius: 8px;
  box-shadow: 0 8px 32px rgb(0 0 0 / 0.4);
  font-size: 0.9375rem; line-height: 1.45;
}
.consent[hidden] { display: none; }
.consent-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
@media (min-width: 480px) {
  .consent { left: auto; width: 364px; }
}

/* 404 */

.nf { display: flex; flex-direction: column; min-height: 100vh; min-height: 100dvh; }
.nf > .site-header { width: 100%; }
.nf-main { flex: 1; width: 100%; padding-block: 64px; }
.nf-main p { margin: 20px 0 32px; color: var(--muted); }

/* Motion: one moment on load */

@keyframes rise { from { opacity: 0; transform: translateY(12px); } }
@keyframes fade { from { opacity: 0; } }
.si.d1, .si.d2, .si.d3 { animation: fade 167ms linear backwards; }
.si.d1 { animation-delay: 150ms; }
.si.d2 { animation-delay: 190ms; }
.si.d3 { animation-delay: 230ms; }

/* Responsive */

@media (max-width: 419.98px) {
  .sys { display: none; }
  .cmd { font-size: 0.8125rem; }
}

/* 320px (400% zoom): the example taskbar must fit without sideways scrolling */
@media (max-width: 359.98px) {
  .chev { display: none; }
  .strip { gap: 8px; }
}

@media (min-width: 768px) {
  :root { --g: 24px; --section: 64px; }
  .sub { font-size: 1.25rem; }
  .flyout { width: auto; margin: 40px -12px 0 0; }
  .rows li { grid-template-columns: 1fr auto; column-gap: 24px; align-items: center; }
  .val { text-align: right; }
  .providers { grid-template-columns: 1fr 1fr; column-gap: 48px; }
  .anatomy { grid-template-columns: auto minmax(0, 1fr); gap: 40px; align-items: center; }
}

@media (min-width: 1024px) {
  :root { --g: 32px; --section: 96px; }
  .hero-top {
    grid-template-columns: minmax(0, 1fr) 398px; column-gap: 48px; /* 396px image + its 1px frame */
    padding: 64px 12px 12px max(32px, calc((100% - 1120px) / 2));
  }
  .hero-copy { align-self: center; }
  .flyout { align-self: end; margin: 0; }
  .anatomy { gap: 64px; }
  .groups, .pair { display: grid; grid-template-columns: 1fr 1fr; column-gap: 48px; }
  .groups .rows, .pair .rows { max-width: none; }
  .yours-grid { grid-template-columns: minmax(0, 1fr) 468px; gap: 48px; align-items: start; }
  .yours-grid .shot { margin-top: 8px; }
}

/* Short laptop screens (1366x768, 1920x1080 at 125%): the panel shrinks so the taskbar stays on the first screen.
   134px = 56 header + 16 padding + 2 frame + 12 gap + 48 taskbar. */
@media (min-width: 1024px) and (max-height: 800px) {
  .hero-top { padding-top: 16px; grid-template-columns: minmax(0, 1fr) auto; }
  .flyout img { width: auto; max-width: none; height: clamp(420px, 100svh - 134px, 561px); }
}

@media (min-width: 1152px) {
  .tb-apps { display: block; position: absolute; top: 12px; left: 50%; transform: translateX(-50%); color: var(--muted); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}