/* ============================================================
   Self-hosted Manrope (sovereign — fonts served from this origin only)
   ============================================================ */
@font-face {
  font-family: "Manrope";
  font-style: normal;
  font-weight: 300;
  font-display: swap;
  src: url("fonts/Manrope-Light.woff2") format("woff2");
}
@font-face {
  font-family: "Manrope";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("fonts/Manrope-Regular.woff2") format("woff2");
}
@font-face {
  font-family: "Manrope";
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url("fonts/Manrope-Medium.woff2") format("woff2");
}
@font-face {
  font-family: "Manrope";
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url("fonts/Manrope-SemiBold.woff2") format("woff2");
}
@font-face {
  font-family: "Manrope";
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url("fonts/Manrope-Bold.woff2") format("woff2");
}
@font-face {
  font-family: "Manrope";
  font-style: normal;
  font-weight: 800;
  font-display: swap;
  src: url("fonts/Manrope-ExtraBold.woff2") format("woff2");
}

/* ============================================================
   OSE design tokens — matched to opensourceeurope.org
   (palette + the signature 4-color gradient; neutral white-alpha
   borders, NO cyan tinting)
   ============================================================ */
:root {
  --ose-ink: #0A242B;        /* page background / dark surfaces */
  --ose-ink-2: #0E282F;      /* card fill */
  --ose-ink-3: #163037;      /* ring-button hover fill */
  --ose-cyan: #9FE7F5;       /* accent: citation chips + code text only */
  --ose-orange: #F27F0C;
  --ose-yellow: #F7AD1A;
  --ose-gradient: linear-gradient(135deg, #419EBD 10%, #9FE7F5 25%, #F7AD1A 75%, #F27F0C 100%);

  --ose-radius-card: 24px;
  --ose-radius-md: 12px;
  --ose-radius-pill: 9999px;
  --ose-font: "Manrope", ui-sans-serif, system-ui, sans-serif;

  --border: rgba(255, 255, 255, 0.16);       /* 2px card borders (site: #FFFFFF29) */
  --border-soft: rgba(255, 255, 255, 0.10);  /* 1px hairlines */
  --raised: rgba(255, 255, 255, 0.08);       /* site: bg-white/8 */
  --raised-2: rgba(255, 255, 255, 0.16);     /* site: bg-white/16 */
  --text: #FFFFFF;
  --text-soft: rgba(255, 255, 255, 0.75);
  --text-muted: rgba(255, 255, 255, 0.55);
}

/* ============================================================
   Reset / base
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--ose-font);
  font-weight: 300; /* the site's body weight */
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: var(--ose-ink);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

.wrap { width: 100%; max-width: 920px; margin: 0 auto; padding: 0 24px; }

a { color: inherit; }

/* Visible focus rings everywhere (a11y) */
:focus-visible {
  outline: 2px solid rgba(255, 255, 255, 0.85);
  outline-offset: 2px;
  border-radius: 6px;
}

/* ============================================================
   Atmosphere — warm orange/amber + teal glows (pure CSS render
   of the site's hero gradient; no image downloads)
   ============================================================ */
.atmosphere {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(900px 600px at 82% -12%, rgba(242, 127, 12, 0.34), transparent 62%),
    radial-gradient(700px 500px at 105% 28%, rgba(247, 173, 26, 0.16), transparent 60%),
    radial-gradient(800px 600px at -12% 92%, rgba(65, 158, 189, 0.30), transparent 62%),
    radial-gradient(600px 500px at 30% 110%, rgba(159, 231, 245, 0.10), transparent 60%),
    var(--ose-ink);
}

/* ============================================================
   Staggered page-load reveal (one orchestrated entrance)
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  animation: rise 0.7s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}
.reveal[data-reveal="1"] { animation-delay: 0.05s; }
.reveal[data-reveal="2"] { animation-delay: 0.18s; }
.reveal[data-reveal="3"] { animation-delay: 0.32s; }
@keyframes rise {
  to { opacity: 1; transform: translateY(0); }
}

/* ============================================================
   Header
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(14px);
  background: rgba(10, 36, 43, 0.62);
  border-bottom: 1px solid var(--border-soft);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  height: 78px;
}
.logo { display: inline-flex; align-items: center; }
.logo img { display: block; }

.header-nav { display: flex; align-items: center; gap: 18px; }

/* Icon-only link (GitHub / source) */
.icon-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  color: var(--text-muted);
  transition: color 0.2s ease, background 0.2s ease;
}
.icon-link:hover { color: var(--text); background: var(--raised); }

/* ============================================================
   Buttons
   ============================================================ */
.btn {
  font-family: inherit;
  cursor: pointer;
  border: none;
  border-radius: var(--ose-radius-pill);
  font-weight: 600;
  transition: transform 0.15s ease, background 0.2s ease, box-shadow 0.2s ease, color 0.2s ease;
}

/* The OSE signature: pill with a 2px gradient ring around a dark core.
   Hover fills the core with --ose-ink-3 (exactly like the site). */
.ring {
  display: inline-flex;
  padding: 2px;
  border: none;
  border-radius: var(--ose-radius-pill);
  background: var(--ose-gradient);
  cursor: pointer;
  font-family: inherit;
}
.ring__inner {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--ose-ink);
  color: var(--text);
  border-radius: var(--ose-radius-pill);
  padding: 9px 20px;
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
  transition: background 0.25s ease;
}
.ring:hover .ring__inner { background: var(--ose-ink-3); }
.ring[aria-expanded="true"] .ring__inner { background: var(--ose-ink-3); }
.ring:disabled { opacity: 0.5; cursor: not-allowed; }
.ring:disabled .ring__inner { background: var(--ose-ink); }

.ring--send { border-radius: 50%; flex: 0 0 auto; }
.ring--send .ring__inner {
  width: 44px;
  height: 44px;
  padding: 0;
  border-radius: 50%;
}

.btn--copy {
  background: var(--raised);
  color: var(--text);
  border: 1px solid var(--border-soft);
  padding: 5px 14px;
  font-size: 12.5px;
  font-weight: 600;
}
.btn--copy:hover { background: var(--raised-2); }
.btn--copy.is-copied { background: var(--ose-cyan); color: var(--ose-ink); border-color: var(--ose-cyan); }

/* ============================================================
   Main / Hero
   ============================================================ */
.main { padding: 48px 0 40px; }
.hero { text-align: center; max-width: 680px; margin: 0 auto 36px; }
.hero__eyebrow {
  margin: 0 0 14px;
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  background: var(--ose-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  display: inline-block;
}
.hero__title {
  margin: 0 0 16px;
  font-weight: 600; /* site headings are semibold, not extrabold */
  /* vw drives the size so "Open Source Europe" always fits on one line;
     it shrinks on tiny screens rather than wrapping. Capped at 4rem. */
  font-size: clamp(1.5rem, 8.5vw, 4rem);
  line-height: 1.05;
  letter-spacing: -0.01em;
  color: var(--text);
}
/* "Ask" on line one, "Open Source Europe" on line two — the second line
   must never break, so scale the font (above) instead of wrapping it. */
.hero__title-lead,
.hero__title-main { display: block; }
.hero__title-main { white-space: nowrap; }
.hero__lede {
  margin: 0;
  font-size: clamp(1rem, 2.2vw, 1.15rem);
  line-height: 1.65;
  color: var(--text-soft);
  font-weight: 300;
}

/* ============================================================
   Tools panel (collapsible)
   ============================================================ */
.tools-panel {
  background: var(--ose-ink-2);
  border: 2px solid var(--border);
  border-radius: var(--ose-radius-card);
  padding: 26px;
  margin: 0 auto 32px;
}
.tools-panel__title { margin: 0 0 4px; font-size: 1.15rem; font-weight: 600; letter-spacing: -0.01em; }
.tools-panel__sub { margin: 0 0 20px; color: var(--text-soft); font-size: 0.95rem; font-weight: 300; }
.tools-grid { display: grid; gap: 16px; }
@media (min-width: 720px) {
  .tools-grid { grid-template-columns: 1fr 1fr; }
  .snippet--wide { grid-column: 1 / -1; }
}

.snippet {
  background: var(--ose-ink);
  border: 1px solid var(--border-soft);
  border-radius: var(--ose-radius-md);
  overflow: hidden;
}
.snippet__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px 10px 16px;
  border-bottom: 1px solid var(--border-soft);
  background: rgba(255, 255, 255, 0.04);
}
.snippet__label { font-size: 12.5px; font-weight: 600; color: var(--text-muted); letter-spacing: 0.03em; }
.snippet__code {
  margin: 0;
  padding: 16px;
  font-family: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--ose-cyan);
  overflow-x: auto;
  white-space: pre;
  tab-size: 2;
}
.snippet__hint {
  margin: 0;
  padding: 0 16px 14px;
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--text-muted);
  font-weight: 300;
}
.snippet__hint code {
  font-family: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  font-size: 0.95em;
}
.snippet__hint a { color: var(--text-soft); }

/* Prose body inside a snippet box (Sovereignty panel — no code, no copy button) */
.snippet__hint--body {
  padding: 16px;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--text-soft);
}
.snippet__hint--body code {
  color: var(--ose-cyan);
  font-size: 0.9em;
}

/* ============================================================
   Chat
   ============================================================ */
.chat {
  background: var(--ose-ink-2);
  border: 2px solid var(--border);
  border-radius: var(--ose-radius-card);
  overflow: hidden;
}
.transcript {
  padding: 28px 26px 8px;
  max-height: 56vh;
  max-height: 56dvh; /* dynamic viewport — correct under mobile browser chrome */
  min-height: 200px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 18px;
  scroll-behavior: smooth;
}

.empty-state {
  margin: auto 0;
  text-align: center;
  color: var(--text-muted);
  padding: 20px 0 28px;
}
.empty-state__dot {
  width: 12px; height: 12px;
  border-radius: 50%;
  margin: 0 auto 16px;
  background: var(--ose-gradient);
}
.empty-state p { margin: 0; display: flex; flex-wrap: wrap; gap: 8px; align-items: center; justify-content: center; }

.chip--suggest {
  background: var(--raised);
  border: 1px solid var(--border-soft);
  color: var(--text-soft);
  border-radius: var(--ose-radius-pill);
  padding: 7px 14px;
  font-family: inherit;
  font-size: 13.5px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}
.chip--suggest:hover { background: var(--raised-2); color: var(--text); border-color: var(--border); }

/* Message bubbles */
.msg { display: flex; flex-direction: column; max-width: 86%; animation: bubble 0.35s cubic-bezier(0.22, 1, 0.36, 1) both; }
@keyframes bubble { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }
.msg--user { align-self: flex-end; align-items: flex-end; }
.msg--assistant { align-self: flex-start; align-items: flex-start; }

.msg__role {
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin: 0 4px 6px;
}
.msg__bubble {
  border-radius: var(--ose-radius-md);
  padding: 13px 16px;
  font-size: 15px;
  line-height: 1.62;
  white-space: pre-wrap;
  word-wrap: break-word;
}
.msg--user .msg__bubble {
  background: var(--raised-2);
  color: var(--text);
  border-bottom-right-radius: 4px;
  font-weight: 500;
}
.msg--assistant .msg__bubble {
  background: var(--raised);
  color: var(--text);
  border-bottom-left-radius: 4px;
  font-weight: 300;
}

/* Rendered markdown inside assistant bubbles */
.msg__bubble--md { white-space: normal; }
.msg__bubble--md p,
.msg__bubble--md ul,
.msg__bubble--md ol { margin: 0 0 10px; }
.msg__bubble--md > :last-child { margin-bottom: 0; }
.msg__bubble--md ul,
.msg__bubble--md ol { padding-left: 22px; }
.msg__bubble--md li { margin: 3px 0; }
.msg__bubble--md li::marker { color: var(--text-muted); }
.msg__bubble--md .md-h {
  font-weight: 600;
  margin: 14px 0 6px;
}
.msg__bubble--md .md-h:first-child { margin-top: 0; }
.msg__bubble--md code {
  background: var(--raised);
  border: 1px solid var(--border-soft);
  border-radius: 4px;
  padding: 1px 5px;
  font-size: 0.88em;
}
.msg__bubble--md a {
  color: var(--ose-cyan);
  text-decoration: underline;
  text-underline-offset: 2px;
  word-break: break-all;
}
.msg__bubble--md a:hover { text-decoration: none; }

/* Citations */
.citations {
  margin: 14px 4px 0;
  padding-top: 12px;
  border-top: 1px dashed var(--border-soft);
}
.citations__label {
  display: block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 7px;
}
.citations__row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.citation-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  text-decoration: none;
  background: var(--raised);
  border: 1px solid var(--border-soft);
  color: var(--ose-cyan);
  border-radius: var(--ose-radius-pill);
  padding: 5px 12px;
  font-size: 12.5px;
  font-weight: 600;
  transition: background 0.2s ease, border-color 0.2s ease;
}
.citation-chip:hover { background: var(--raised-2); border-color: var(--border); }
.citation-chip__n {
  /* footnote number — matches the inline [n] superscript in the prose */
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 17px; height: 17px;
  padding: 0 4px;
  border-radius: var(--ose-radius-pill);
  background: var(--ose-gradient);
  color: #0a1417;
  font-size: 11px;
  font-weight: 700;
  flex: 0 0 auto;
}
.citation-chip__label { line-height: 1.2; }
.citation-chip::after {
  content: "\2197"; /* ↗ — signals the chip opens the doc page */
  font-size: 11px;
  opacity: 0.75;
}

/* Inline footnote markers in the answer prose: [1] -> superscript link */
.msg__bubble--md sup.fn {
  font-size: 0.7em;
  line-height: 0;
  margin-left: 1px;
}
.msg__bubble--md sup.fn a {
  text-decoration: none;
  padding: 0 3px;
  border-radius: 5px;
  background: var(--raised-2);
  color: var(--ose-cyan);
  font-weight: 700;
}
.msg__bubble--md sup.fn a:hover { background: var(--raised); }

/* Staged loader */
.loader { display: flex; flex-direction: column; align-self: flex-start; max-width: 86%; }
.loader__bubble {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  background: var(--raised);
  border-radius: var(--ose-radius-md);
  border-bottom-left-radius: 4px;
  padding: 13px 16px;
  font-size: 14.5px;
  color: var(--text-soft);
}
.loader__label { color: var(--text-soft); }
.loader__dots { display: inline-flex; gap: 4px; }
.loader__dots span {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--ose-gradient);
  animation: pulse 1.2s ease-in-out infinite;
}
.loader__dots span:nth-child(2) { animation-delay: 0.18s; }
.loader__dots span:nth-child(3) { animation-delay: 0.36s; }
@keyframes pulse { 0%, 100% { opacity: 0.3; transform: scale(0.8); } 50% { opacity: 1; transform: scale(1); } }

.msg__bubble--error {
  background: rgba(247, 173, 26, 0.1);
  border: 1px solid rgba(247, 173, 26, 0.4);
  color: #f6d79a;
}

/* ============================================================
   Composer
   ============================================================ */
.composer {
  padding: 16px 22px 22px;
  border-top: 1px solid var(--border-soft);
}
.composer__row {
  display: flex;
  align-items: center;
  gap: 12px;
}
.composer__field {
  flex: 1;
  display: flex;
  align-items: flex-end;
  /* Signature gradient border (padding-box ink core + border-box gradient) so the
     primary input reads as THE thing to interact with, matching the .ring buttons. */
  border: 2px solid transparent;
  background:
    linear-gradient(var(--ose-ink), var(--ose-ink)) padding-box,
    var(--ose-gradient) border-box;
  /* Rounded-rect, not a full pill: a single line still reads as a rounded input,
     but multi-line no longer balloons into a giant stadium shape. */
  border-radius: var(--ose-radius-card);
  padding: 8px 22px;
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.28);
  transition: box-shadow 0.2s ease;
}
.composer__field:focus-within {
  box-shadow: 0 0 0 3px rgba(159, 231, 245, 0.18), 0 8px 28px rgba(0, 0, 0, 0.34);
}
.composer__input {
  flex: 1;
  border: none;
  background: transparent;
  resize: none;
  font-family: inherit;
  font-size: 16px; /* never below 16px — iOS Safari zooms the page on focus */
  font-weight: 300;
  line-height: 1.5;
  color: var(--text);
  padding: 11px 0;
  max-height: 160px;
  outline: none;
}
.composer__input::placeholder { color: var(--text-muted); }

/* Demo disclaimer under the composer */
.chat-footnote {
  margin: 0;
  padding: 14px 22px 20px;
  border-top: 1px solid var(--border-soft);
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--text-muted);
  font-weight: 300;
  text-align: center;
}
.chat-footnote strong { color: var(--text-soft); font-weight: 600; }
.chat-footnote__link {
  color: var(--text-soft);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 2px;
  cursor: pointer;
}
.chat-footnote__link:hover { color: var(--ose-cyan); }

/* Opt-in analytics toggle */
.optin {
  display: flex;
  align-items: flex-start;
  gap: 11px;
  margin: 16px 4px 0;
  cursor: pointer;
  font-size: 13px;
  line-height: 1.5;
  color: var(--text-soft);
  font-weight: 300;
}
.optin__box {
  position: absolute;
  opacity: 0;
  width: 1px; height: 1px;
  margin: 0;
}
.optin__custom {
  flex: 0 0 auto;
  width: 18px; height: 18px;
  margin-top: 1px;
  border-radius: 5px;
  border: 1.5px solid var(--text-muted);
  background: transparent;
  transition: background 0.18s ease, border-color 0.18s ease;
  position: relative;
}
.optin__custom::after {
  content: "";
  position: absolute;
  left: 5px; top: 1px;
  width: 5px; height: 9px;
  border: solid var(--ose-ink);
  border-width: 0 2px 2px 0;
  transform: rotate(45deg) scale(0);
  transition: transform 0.18s cubic-bezier(0.22, 1, 0.36, 1);
}
.optin__box:checked + .optin__custom {
  background: var(--ose-gradient);
  border-color: transparent;
}
.optin__box:checked + .optin__custom::after { transform: rotate(45deg) scale(1); }
.optin__box:focus-visible + .optin__custom {
  outline: 2px solid rgba(255, 255, 255, 0.85);
  outline-offset: 2px;
}
.optin__muted { color: var(--text-muted); }

/* ============================================================
   Reduced motion — disable all entrance animation
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1 !important; transform: none !important; animation: none !important; }
  .msg { animation: none !important; }
  .loader__dots span { animation: none !important; opacity: 0.7; }
  html { scroll-behavior: auto; }
  .transcript { scroll-behavior: auto; }
}

/* Header label: short variant only shows on small screens */
.label-short { display: none; }

/* Small screens */
@media (max-width: 560px) {
  .wrap { padding: 0 14px; }
  .main { padding: 28px 0 24px; }

  .hero { margin-bottom: 26px; }
  /* keep the vw-driven title from the base rule so line two never wraps */
  .hero__eyebrow { letter-spacing: 0.1em; }

  .header-inner { height: 60px; gap: 8px; }
  .header-nav { gap: 8px; }
  .logo img { width: 76px; height: 32px; }
  .ring__inner { padding: 8px 12px; font-size: 12.5px; }
  /* swap the long header label for the short one */
  .label-full { display: none; }
  .label-short { display: inline; }

  .tools-panel { padding: 18px 14px; border-radius: 18px; }
  .snippet__code { font-size: 12px; padding: 12px; }

  .chat { border-radius: 18px; }
  .transcript { padding: 20px 14px 6px; }
  .composer { padding: 12px 12px 16px; }
  .composer__field { padding: 4px 16px; }
  .msg { max-width: 94%; }
  .msg__bubble { font-size: 14.5px; padding: 11px 13px; }

  .citation-chip { max-width: 100%; }
}