/* FreeCharting shared styles: tokens, reset, buttons, site chrome, landing, docs. */

:root {
  --bg: #ffffff;
  --bg-2: #f5f7fb;
  --panel: #ffffff;
  --panel-2: #f7f8fb;
  --chart-bg: #ffffff;
  --border: #e3e7ef;
  --border-strong: #cfd5e1;
  --text: #0f172a;
  --text-2: #334155;
  --muted: #5b6478;
  --accent: #4561f5;
  --accent-hover: #3550e0;
  --accent-soft: rgba(69, 97, 245, 0.1);
  --accent-text: #ffffff;
  --up: #089981;
  --down: #f23645;
  --warn-bg: #fff7e6;
  --warn-border: #f5d48a;
  --shadow: 0 1px 2px rgba(15, 23, 42, 0.05), 0 10px 30px rgba(15, 23, 42, 0.08);
  --radius: 10px;
  --radius-sm: 7px;
  --font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  color-scheme: light;
}

:root[data-theme="dark"] {
  --bg: #0b0e14;
  --bg-2: #0f131b;
  --panel: #131722;
  --panel-2: #181d2a;
  --chart-bg: #131722;
  --border: #232838;
  --border-strong: #2f364a;
  --text: #e6e9f0;
  --text-2: #c3c9d6;
  --muted: #8a93a6;
  --accent: #6d85ff;
  --accent-hover: #8298ff;
  --accent-soft: rgba(109, 133, 255, 0.14);
  --accent-text: #0b0e14;
  --warn-bg: rgba(245, 180, 60, 0.08);
  --warn-border: rgba(245, 180, 60, 0.35);
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 16px 40px rgba(0, 0, 0, 0.45);
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.6 var(--font);
  -webkit-font-smoothing: antialiased;
}
img, svg { display: block; max-width: 100%; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3, h4 { line-height: 1.2; margin: 0 0 0.5em; letter-spacing: -0.01em; }
p { margin: 0 0 1em; }
code, kbd { font-family: var(--mono); font-size: 0.88em; }
code {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 0.1em 0.4em;
  white-space: nowrap;
}
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}
.muted { color: var(--muted); }
.small { font-size: 13px; }
.spacer { flex: 1; }

/* Theme toggle icons */
.icon-sun { display: none; }
:root[data-theme="dark"] .icon-sun { display: block; }
:root[data-theme="dark"] .icon-moon { display: none; }

/* ---------------------------------------------------------------- buttons */

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 38px; padding: 0 16px;
  border: 1px solid var(--border-strong); border-radius: var(--radius-sm);
  background: var(--panel); color: var(--text);
  font: 500 14px/1 var(--font); cursor: pointer; white-space: nowrap;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}
.btn:hover { background: var(--panel-2); text-decoration: none; }
.btn-primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }
.btn-primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); }
.btn-lg { height: 46px; padding: 0 22px; font-size: 15px; border-radius: var(--radius); }
.btn-icon { width: 38px; padding: 0; }
.btn-danger-ghost { border-color: transparent; background: transparent; color: var(--down); }
.btn-danger-ghost:hover { background: rgba(242, 54, 69, 0.08); }
.link {
  border: 0; background: none; padding: 0; font: inherit;
  color: var(--accent); cursor: pointer;
}
.link:hover { text-decoration: underline; }

/* ---------------------------------------------------------------- site header */

.site-header {
  position: sticky; top: 0; z-index: 20;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid var(--border);
}
.nav {
  max-width: 1160px; margin: 0 auto; padding: 0 20px;
  height: 60px; display: flex; align-items: center; gap: 28px;
}
.brand {
  display: inline-flex; align-items: center; gap: 10px;
  color: var(--text); font-weight: 700; font-size: 17px; letter-spacing: -0.02em;
}
.brand:hover { text-decoration: none; }
.nav-links { display: flex; align-items: center; gap: 22px; }
.nav-links a { color: var(--text-2); font-weight: 500; font-size: 14px; }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--text); text-decoration: none; }
.nav-actions { margin-left: auto; display: flex; align-items: center; gap: 10px; }
.icon-btn {
  width: 38px; height: 38px; display: inline-grid; place-items: center;
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  background: transparent; color: var(--text-2); cursor: pointer;
}
.icon-btn:hover { background: var(--panel-2); color: var(--text); }
.nav-toggle { display: none; }

@media (max-width: 760px) {
  .nav { gap: 12px; }
  .nav-toggle { display: inline-grid; }
  .nav-links {
    display: none; position: absolute; top: 60px; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--bg); border-bottom: 1px solid var(--border); padding: 8px 20px 16px;
  }
  .nav-links a { padding: 10px 0; font-size: 16px; }
  body.nav-open .nav-links { display: flex; }
  .nav-actions .btn-primary { display: none; }
}

/* ---------------------------------------------------------------- page layout */

.container { max-width: 1160px; margin: 0 auto; padding: 0 20px; }
section { padding: 72px 0; }
.section-head { max-width: 680px; margin: 0 0 36px; }
.section-head h2 { font-size: clamp(26px, 3.4vw, 34px); }
.section-head p { color: var(--muted); font-size: 17px; }
.eyebrow {
  display: inline-block; margin-bottom: 14px;
  color: var(--accent); font-weight: 600; font-size: 13px; letter-spacing: 0.06em; text-transform: uppercase;
}

/* ---------------------------------------------------------------- hero */

.hero { padding: 64px 0 40px; position: relative; overflow: hidden; }
.hero::before {
  content: ""; position: absolute; inset: -30% -10% auto; height: 520px; z-index: -1;
  background: radial-gradient(ellipse at 50% 0%, var(--accent-soft), transparent 65%);
}
.hero-inner { text-align: center; max-width: 820px; margin: 0 auto; }
.hero h1 { font-size: clamp(34px, 6vw, 58px); letter-spacing: -0.035em; margin-bottom: 18px; }
.hero h1 .grad {
  background: linear-gradient(90deg, var(--accent), #12b5a0);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero .lede { font-size: clamp(16px, 2.2vw, 19px); color: var(--muted); max-width: 640px; margin: 0 auto 28px; }
.hero-ctas { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.hero-note { margin-top: 16px; font-size: 13px; color: var(--muted); }

.preview {
  margin: 48px auto 0; max-width: 1080px;
  border: 1px solid var(--border); border-radius: 14px; overflow: hidden;
  background: var(--chart-bg); box-shadow: var(--shadow);
}
.preview-bar {
  display: flex; align-items: center; gap: 10px; padding: 10px 14px;
  border-bottom: 1px solid var(--border); font-size: 13px; color: var(--muted);
}
.preview-bar b { color: var(--text); font-size: 14px; }
.preview-dots { display: flex; gap: 6px; margin-right: 6px; }
.preview-dots i { width: 10px; height: 10px; border-radius: 50%; background: var(--border-strong); }
.preview-live { margin-left: auto; display: inline-flex; align-items: center; gap: 6px; }
.preview-live::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--up); }
#preview-chart { height: clamp(280px, 42vw, 440px); }
.preview-fallback { display: grid; place-items: center; height: 100%; color: var(--muted); font-size: 14px; }

/* ---------------------------------------------------------------- features */

.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.feature {
  padding: 22px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--panel);
}
.feature-icon {
  width: 38px; height: 38px; border-radius: 9px; display: grid; place-items: center;
  background: var(--accent-soft); color: var(--accent); margin-bottom: 14px;
}
.feature h3 { font-size: 16px; margin-bottom: 6px; }
.feature p { color: var(--muted); font-size: 14px; margin: 0; }
@media (max-width: 900px) { .features { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 580px) { .features { grid-template-columns: 1fr; } }

.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; counter-reset: step; }
.step { padding: 22px; border-radius: var(--radius); background: var(--bg-2); border: 1px solid var(--border); }
.step::before {
  counter-increment: step; content: counter(step);
  display: grid; place-items: center; width: 30px; height: 30px; border-radius: 50%;
  background: var(--accent); color: var(--accent-text); font-weight: 700; font-size: 14px; margin-bottom: 14px;
}
.step h3 { font-size: 16px; }
.step p { color: var(--muted); font-size: 14px; margin: 0; }
@media (max-width: 760px) { .steps { grid-template-columns: 1fr; } }

.alt { background: var(--bg-2); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }

/* ---------------------------------------------------------------- tables */

.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius); background: var(--panel); }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 12px 16px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { font-size: 12px; text-transform: uppercase; letter-spacing: 0.05em; color: var(--muted); font-weight: 600; background: var(--panel-2); }
tr:last-child td { border-bottom: 0; }
td b { color: var(--text); }
.pill {
  display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 12px; font-weight: 600;
  background: var(--accent-soft); color: var(--accent); white-space: nowrap;
}
.pill-green { background: rgba(8, 153, 129, 0.12); color: var(--up); }
.pill-paid { background: rgba(224, 161, 0, 0.14); color: #b07d00; }
:root[data-theme="dark"] .pill-paid { color: #f0b429; }
a.pill:hover { text-decoration: none; filter: brightness(1.1); }

/* ---------------------------------------------------------------- CTA + footer */

.cta {
  text-align: center; padding: 48px 24px; border-radius: 16px;
  border: 1px solid var(--border); background: linear-gradient(180deg, var(--accent-soft), transparent);
}
.cta h2 { font-size: clamp(24px, 3.2vw, 32px); }
.cta p { color: var(--muted); }

.site-footer { border-top: 1px solid var(--border); padding: 36px 0 44px; color: var(--muted); font-size: 13px; }
.footer-grid { display: flex; flex-wrap: wrap; gap: 24px 48px; justify-content: space-between; }
.footer-links { display: flex; gap: 20px; flex-wrap: wrap; }
.footer-links a { color: var(--text-2); }
.disclaimer { margin-top: 20px; max-width: 820px; }

/* ---------------------------------------------------------------- docs (API key guide) */

.docs { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 48px; padding: 48px 20px 80px; max-width: 1160px; margin: 0 auto; }
.toc { position: sticky; top: 84px; align-self: start; font-size: 14px; }
.toc h4 { font-size: 12px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); margin-bottom: 10px; }
.toc ol { list-style: none; margin: 0; padding: 0; border-left: 1px solid var(--border); }
.toc a { display: block; padding: 5px 0 5px 14px; margin-left: -1px; color: var(--text-2); border-left: 2px solid transparent; }
.toc a:hover { color: var(--text); border-left-color: var(--border-strong); text-decoration: none; }
.toc .sub a { padding-left: 26px; font-size: 13px; color: var(--muted); }
.prose { max-width: 760px; }
.prose h1 { font-size: clamp(30px, 4.5vw, 42px); letter-spacing: -0.03em; }
.prose .lede { font-size: 18px; color: var(--muted); }
.prose h2 { font-size: 26px; margin-top: 56px; padding-top: 8px; scroll-margin-top: 80px; }
.prose h3 { font-size: 19px; margin-top: 32px; scroll-margin-top: 80px; }
.prose ul, .prose ol { padding-left: 22px; margin: 0 0 1em; }
.prose li { margin-bottom: 6px; }
.prose li::marker { color: var(--muted); }
.callout {
  padding: 16px 18px; border-radius: var(--radius); border: 1px solid var(--border);
  background: var(--bg-2); margin: 20px 0; font-size: 14px;
}
.callout p:last-child { margin: 0; }
.callout-warn { background: var(--warn-bg); border-color: var(--warn-border); }
.callout-accent { background: var(--accent-soft); border-color: transparent; }

.provider-card {
  border: 1px solid var(--border); border-radius: 14px; background: var(--panel);
  padding: 24px; margin: 24px 0; scroll-margin-top: 80px;
}
.provider-card h2 { margin-top: 0; padding-top: 0; font-size: 22px; display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.facts { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--border); border: 1px solid var(--border); border-radius: var(--radius-sm); overflow: hidden; margin: 16px 0 20px; }
.facts div { background: var(--panel-2); padding: 10px 14px; }
.facts dt { font-size: 11px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); font-weight: 600; }
.facts dd { margin: 2px 0 0; font-size: 14px; font-weight: 500; }
.provider-card ol.signup { counter-reset: s; list-style: none; padding: 0; }
.provider-card ol.signup > li { counter-increment: s; position: relative; padding-left: 36px; margin-bottom: 10px; }
.provider-card ol.signup > li::before {
  content: counter(s); position: absolute; left: 0; top: 1px;
  width: 24px; height: 24px; border-radius: 50%; display: grid; place-items: center;
  background: var(--accent-soft); color: var(--accent); font-size: 12px; font-weight: 700;
}
.provider-actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 16px; }
details { border-bottom: 1px solid var(--border); padding: 14px 0; }
details summary { cursor: pointer; font-weight: 600; list-style: none; display: flex; justify-content: space-between; gap: 12px; }
details summary::-webkit-details-marker { display: none; }
details summary::after { content: "+"; color: var(--muted); font-weight: 400; font-size: 20px; line-height: 1; }
details[open] summary::after { content: "−"; }
details p { margin: 10px 0 0; color: var(--text-2); }

@media (max-width: 900px) {
  .docs { grid-template-columns: 1fr; gap: 0; padding-top: 32px; }
  .toc { display: none; }
  .facts { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 480px) {
  .facts { grid-template-columns: 1fr; }
  .provider-card { padding: 18px; }
}

/* ---------------------------------------------------------------- error pages */

.error-page { min-height: 70vh; display: grid; place-items: center; text-align: center; padding: 40px 20px; }
.error-page .code { font-size: clamp(64px, 14vw, 120px); font-weight: 800; letter-spacing: -0.05em; color: var(--border-strong); line-height: 1; }