/* ==========================================================================
   Gravy — design tokens, reset and primitives
   ========================================================================== */

@font-face {
  font-family: 'Inter';
  src: url('/assets/fonts/inter-latin.woff2') format('woff2');
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Inter';
  src: url('/assets/fonts/inter-latin-italic.woff2') format('woff2');
  font-weight: 100 900;
  font-style: italic;
  font-display: swap;
}
@font-face {
  font-family: 'Instrument Serif';
  src: url('/assets/fonts/instrument-serif-latin-400-normal.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Instrument Serif';
  src: url('/assets/fonts/instrument-serif-latin-400-italic.woff2') format('woff2');
  font-weight: 400;
  font-style: italic;
  font-display: swap;
}

:root {
  /* Apple-style stack: SF on Apple hardware, Inter everywhere else. */
  --font-sans: -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'Inter', 'Helvetica Neue', Arial, sans-serif;
  --font-display: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Inter', 'Helvetica Neue', Arial, sans-serif;
  --font-serif: var(--font-display);

  --bg: #ffffff;
  --bg-soft: #f5f5f7;
  --surface: #ffffff;
  --surface-2: #f5f5f7;
  --ink: #1d1d1f;
  --ink-2: #515154;
  --ink-3: #86868b;
  --line: #e6e6e9;
  --line-strong: #d2d2d7;
  --accent: #206bea;
  --accent-ink: #1a56bb;
  --accent-soft: #e9f1fd;
  --accent-contrast: #ffffff;
  --success: #1f7a53;
  --warning: #b4741b;
  --danger: #c0392b;
  --shadow-sm: 0 1px 2px rgba(20, 22, 26, 0.05);
  --shadow-md: 0 10px 30px -18px rgba(20, 22, 26, 0.35);
  --shadow-lg: 0 30px 80px -40px rgba(20, 22, 26, 0.45);

  --radius-xs: 6px;
  --radius-card: 10px;
  --radius-sm: 8px;
  --radius: 10px;
  --radius-lg: 10px;
  --radius-pill: 980px;
  --btn-radius: 8px;
  --btn-radius-cta: 32px;

  --container: 1180px;
  --gap: clamp(16px, 2vw, 26px);
  --header-h: 58px;

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  color-scheme: light;
}

[data-theme='dark'] {
  --bg: #000000;
  --bg-soft: #0a0a0a;
  --surface: #1d1d1f;
  --surface-2: #161617;
  --ink: #f5f5f7;
  --ink-2: #a1a1a6;
  --ink-3: #86868b;
  --line: #2a2a2d;
  --line-strong: #3a3a3d;
  --accent: #6ba1f2;
  --accent-ink: #9dc0f7;
  --accent-soft: #16243c;
  --accent-contrast: #ffffff;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 10px 30px -18px rgba(0, 0, 0, 0.8);
  --shadow-lg: 0 30px 80px -30px rgba(0, 0, 0, 0.9);
  color-scheme: dark;
}

*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 24px);
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16.5px;
  line-height: 1.55;
  letter-spacing: -0.011em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: 'cv05' 1, 'ss03' 1;
}

img, svg, video { max-width: 100%; display: block; }
img { height: auto; }
a { color: inherit; text-decoration: none; }
button, input, textarea, select { font: inherit; color: inherit; }
button { cursor: pointer; background: none; border: 0; padding: 0; }
hr { border: 0; border-top: 1px solid var(--line); margin: 0; }
::selection { background: color-mix(in srgb, var(--accent) 24%, transparent); }

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-weight: 620;
  letter-spacing: -0.022em;
  line-height: 1.15;
  text-wrap: balance;
}
h1 { font-size: clamp(2rem, 4.2vw, 3.4rem); }
h2 { font-size: clamp(1.6rem, 2.6vw, 2.3rem); }
h3 { font-size: clamp(1.2rem, 1.7vw, 1.5rem); }
p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }
strong { font-weight: 620; }
small { font-size: 0.82em; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap; border: 0;
}

.skip-link {
  position: fixed;
  top: -100px; left: 16px;
  z-index: 200;
  background: var(--ink);
  color: var(--bg);
  padding: 10px 16px;
  border-radius: var(--radius-pill);
  transition: top 0.2s var(--ease);
}
.skip-link:focus { top: 16px; }

/* --------------------------------------------------------------- layout */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: clamp(18px, 3vw, 40px);
}
.container--narrow { max-width: 780px; }
.stack > * + * { margin-top: var(--stack, 16px); }

.section { padding-block: clamp(40px, 6vw, 76px); }
.section--tight { padding-block: clamp(28px, 4vw, 48px); }
.section--soft { background: var(--bg-soft); }

.grid { display: grid; gap: var(--gap); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
@media (max-width: 980px) {
  .grid--3, .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 620px) {
  .grid--2, .grid--3, .grid--4 { grid-template-columns: minmax(0, 1fr); }
}

/* ------------------------------------------------------------ typography */
.eyebrow,
.kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-3);
}
.kicker::before {
  content: '';
  width: 18px; height: 1px;
  background: currentColor;
  opacity: 0.6;
}
.serif { font-family: var(--font-display); font-weight: 600; letter-spacing: -0.02em; }
.serif-italic { font-family: var(--font-display); font-style: italic; font-weight: 600; }
.lede { font-size: clamp(1.05rem, 1.5vw, 1.2rem); color: var(--ink-2); line-height: 1.65; }
.muted { color: var(--ink-3); }
.small { font-size: 0.86rem; }

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: clamp(20px, 3vw, 34px);
}
.section-head h2 { font-size: clamp(1.5rem, 2.4vw, 2rem); }
.section-head p { margin: 6px 0 0; color: var(--ink-3); font-size: 0.95rem; }
.section-head__link {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 0.86rem; font-weight: 560; color: var(--ink-2);
  padding-bottom: 2px;
  border-bottom: 1px solid var(--line-strong);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), gap 0.2s var(--ease);
  white-space: nowrap;
}
.section-head__link:hover { color: var(--accent); border-color: var(--accent); gap: 12px; }

/* --------------------------------------------------------------- buttons */
/* Buttons follow the demo: 8px corners, compact padding, one blue. */
.btn {
  --btn-bg: var(--accent);
  --btn-bg-hover: #3b7ded;
  --btn-fg: #ffffff;
  --btn-ring: rgba(32, 107, 234, 0.2);
  --btn-r: var(--btn-radius);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 8px 14px;
  border-radius: var(--btn-r);
  background: var(--btn-bg);
  color: var(--btn-fg);
  font-size: 0.83rem;
  font-weight: 500;
  letter-spacing: -0.005em;
  line-height: 1.25;
  border: 1px solid transparent;
  transition: background-color 0.22s var(--ease), color 0.22s var(--ease),
              border-color 0.22s var(--ease), box-shadow 0.22s var(--ease);
  white-space: nowrap;
  user-select: none;
}
.btn:hover { background: var(--btn-bg-hover); box-shadow: 0 0 0 3px var(--btn-ring); }
.btn:active { transform: translateY(1px); }
.btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.btn svg { width: 14px; height: 14px; flex: none; }
.btn--accent { --btn-bg: var(--accent); --btn-fg: #ffffff; }
.btn--ghost {
  --btn-bg: #e1e7f0;
  --btn-bg-hover: #d6dee9;
  --btn-fg: #161616;
  --btn-ring: rgba(22, 22, 22, 0.1);
}
[data-theme='dark'] .btn--ghost { --btn-bg: #2c2c2e; --btn-bg-hover: #353538; --btn-fg: #f5f5f7; --btn-ring: rgba(255, 255, 255, 0.12); }
.btn--soft { --btn-bg: var(--surface-2); --btn-bg-hover: var(--surface-2); --btn-fg: var(--ink); --btn-ring: rgba(0, 0, 0, 0.08); border-color: var(--line); }
.btn--sm { padding: 6px 12px; font-size: 0.76rem; }
.btn--sm.btn--cta { padding: 6px 14px; }
.btn--lg { padding: 11px 20px; font-size: 0.9rem; }
/* The theme keeps a wider radius for calls to action (32px) and 8px for
   everything else; setting it as a variable makes the two compose. */
.btn--cta { --btn-r: var(--btn-radius-cta); padding: 9px 18px; font-size: 0.84rem; }
.btn--block { width: 100%; }
.btn[disabled] { opacity: 0.55; pointer-events: none; }

.icon-btn {
  display: inline-grid;
  place-items: center;
  width: 36px; height: 36px;
  border-radius: 50%;
  border: 1px solid var(--line);
  color: var(--ink-2);
  background: var(--surface);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease), transform 0.2s var(--ease);
}
.icon-btn:hover { color: var(--ink); border-color: var(--line-strong); transform: translateY(-1px); }
.icon-btn svg { width: 18px; height: 18px; }

/* ---------------------------------------------------------------- chips */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  background: var(--surface);
  border: 1px solid var(--line);
  font-size: 0.68rem;
  font-weight: 560;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--ink-2);
  transition: color 0.2s var(--ease), background 0.2s var(--ease), border-color 0.2s var(--ease);
}
a.chip:hover { color: var(--accent); border-color: color-mix(in srgb, var(--accent) 40%, var(--line)); }
.chip--accent { background: var(--accent-soft); border-color: transparent; color: var(--accent-ink); }
.chip__dot { width: 6px; height: 6px; border-radius: 50%; background: currentColor; }

/* ---------------------------------------------------------------- forms */
.field { display: block; }
.field + .field { margin-top: 18px; }
.field > span,
.label {
  display: block;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--ink-2);
  margin-bottom: 7px;
}
.input,
.textarea,
.select {
  width: 100%;
  padding: 9px 12px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 9px;
  font-size: 0.9rem;
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease), background 0.2s var(--ease);
}
.input::placeholder, .textarea::placeholder { color: var(--ink-3); opacity: 0.75; }
.input:focus, .textarea:focus, .select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 16%, transparent);
}
.textarea { resize: vertical; min-height: 110px; line-height: 1.6; }
.select { appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%237d858f' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 12px center; padding-right: 34px; }
.help { font-size: 0.78rem; color: var(--ink-3); margin-top: 6px; }

.checkbox { display: inline-flex; align-items: center; gap: 10px; font-size: 0.9rem; color: var(--ink-2); cursor: pointer; }
.checkbox input { width: 17px; height: 17px; accent-color: var(--accent); }

/* ---------------------------------------------------------------- alerts */
.alert {
  display: flex; align-items: flex-start; gap: 10px;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  background: var(--surface);
  font-size: 0.9rem;
}
.alert--success { border-color: color-mix(in srgb, var(--success) 30%, var(--line)); background: color-mix(in srgb, var(--success) 8%, var(--surface)); }
.alert--error { border-color: color-mix(in srgb, var(--danger) 30%, var(--line)); background: color-mix(in srgb, var(--danger) 7%, var(--surface)); }
.alert--warning { border-color: color-mix(in srgb, var(--warning) 30%, var(--line)); background: color-mix(in srgb, var(--warning) 8%, var(--surface)); }
.alert--info { border-color: color-mix(in srgb, var(--accent) 30%, var(--line)); background: var(--accent-soft); }

/* ------------------------------------------------------------- utilities */
.flex { display: flex; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-8 { gap: 8px; } .gap-12 { gap: 12px; } .gap-16 { gap: 16px; } .gap-24 { gap: 24px; }
.mt-0 { margin-top: 0; } .mt-8 { margin-top: 8px; } .mt-16 { margin-top: 16px; } .mt-24 { margin-top: 24px; }
.mb-0 { margin-bottom: 0; } .mb-8 { margin-bottom: 8px; } .mb-16 { margin-bottom: 16px; }
.text-center { text-align: center; }
.w-full { width: 100%; }
.hide { display: none !important; }
.divider { height: 1px; background: var(--line); border: 0; margin: clamp(28px, 4vw, 48px) 0; }

/* scroll reveal */
/* Progressive enhancement: content is visible unless JS is running. */
[data-reveal] { opacity: 1; }
html.js [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.65s var(--ease), transform 0.65s var(--ease);
  transition-delay: var(--reveal-delay, 0ms);
}
html.js [data-reveal].is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
  html { scroll-behavior: auto; }
  [data-reveal] { opacity: 1; transform: none; }
}

/* ==========================================================================
   Shared components used by both the public site and the Studio
   ========================================================================== */
.brand { display: inline-flex; align-items: center; gap: 10px; }
.brand__mark {
  display: grid;
  place-items: center;
  width: 34px; height: 34px;
  border-radius: 10px;
  background: var(--ink);
  color: var(--bg);
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 640;
  line-height: 1;
  padding-bottom: 1px;
  letter-spacing: -0.02em;
  transition: transform 0.4s var(--ease), background 0.2s var(--ease);
}
.brand:hover .brand__mark { transform: rotate(-6deg); background: var(--accent); }
.brand__name {
  font-family: var(--font-display);
  font-size: 1.28rem;
  font-weight: 600;
  letter-spacing: -0.028em;
  line-height: 1;
  padding-bottom: 3px;
}
.brand__tag {
  display: none;
  font-size: 0.66rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-3);
}

/* avatar */
.avatar {
  width: 32px; height: 32px;
  border-radius: 50%;
  object-fit: cover;
  background: var(--surface-2);
  flex: none;
}
.avatar--initials {
  display: inline-grid;
  place-items: center;
  font-size: 0.72rem;
  font-weight: 620;
  letter-spacing: 0.02em;
  color: #fff;
  background: var(--accent);
  text-transform: uppercase;
}
.avatar--lg { width: 56px; height: 56px; }
.avatar--xl { width: 84px; height: 84px; font-size: 1.1rem; }

/* prose */
.prose { font-size: clamp(1.02rem, 1.3vw, 1.13rem); line-height: 1.78; color: var(--ink); }
.prose > * + * { margin-top: 1.25em; }
.prose p { margin: 0; }
.prose > p:first-of-type::first-letter {
  font-family: var(--font-display);
  font-weight: 620;
  font-size: 3.1em;
  line-height: 0.86;
  float: left;
  padding: 0.04em 0.1em 0 0;
  color: var(--ink);
}
.prose h2 {
  font-family: var(--font-display);
  font-weight: 640;
  font-size: clamp(1.45rem, 2.1vw, 1.8rem);
  letter-spacing: -0.028em;
  line-height: 1.16;
  letter-spacing: -0.015em;
  margin-top: 2em;
  scroll-margin-top: calc(var(--header-h) + 28px);
}
.prose h3 {
  font-size: 1.2rem;
  font-weight: 620;
  margin-top: 1.8em;
  scroll-margin-top: calc(var(--header-h) + 28px);
}
.prose h4 { font-size: 1.02rem; margin-top: 1.6em; }
.prose a { color: var(--accent); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 3px; text-decoration-color: color-mix(in srgb, var(--accent) 40%, transparent); transition: text-decoration-color 0.2s; }
.prose a:hover { text-decoration-color: var(--accent); }
.prose strong { font-weight: 640; }
.prose em { font-style: italic; }
.prose ul, .prose ol { padding-left: 1.35em; margin: 0; }
.prose li + li { margin-top: 0.5em; }
.prose li::marker { color: var(--accent); }
.prose blockquote {
  margin: 2em 0;
  padding: 4px 0 4px 26px;
  border-left: 2px solid var(--accent);
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(1.2rem, 1.9vw, 1.45rem);
  line-height: 1.4;
  letter-spacing: -0.02em;
  color: var(--ink);
}
.prose blockquote p + p { margin-top: 0.6em; }
.prose blockquote cite { display: block; margin-top: 12px; font-family: var(--font-sans); font-size: 0.78rem; font-style: normal; color: var(--ink-3); letter-spacing: 0; }
.prose img { border-radius: var(--radius); margin: 1.8em auto 0.6em; }
.prose figure { margin: 2em 0; }
.prose figcaption { font-size: 0.8rem; color: var(--ink-3); text-align: center; margin-top: 10px; }
.prose code {
  font-family: ui-monospace, SFMono-Regular, 'SF Mono', Menlo, monospace;
  font-size: 0.85em;
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0.15em 0.4em;
}
.prose pre {
  position: relative;
  background: #12151c;
  color: #e6e9f2;
  border-radius: var(--radius);
  padding: 20px 22px;
  overflow-x: auto;
  font-size: 0.85rem;
  line-height: 1.7;
  margin: 1.8em 0;
}
.prose pre code { background: none; border: 0; padding: 0; color: inherit; font-size: inherit; }
.prose hr { margin: 2.4em auto; border: 0; border-top: 1px solid var(--line); width: 100%; }
.prose table { width: 100%; border-collapse: collapse; font-size: 0.9rem; margin: 1.8em 0; }
.prose th, .prose td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); }
.prose th { font-size: 0.76rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-3); font-weight: 650; }
.prose mark { background: color-mix(in srgb, var(--accent) 18%, transparent); color: inherit; padding: 0 0.2em; border-radius: 3px; }
.prose > p + p { margin-top: 1.25em; }



.link-btn {
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 520;
}
.link-btn:hover { text-decoration: underline; text-underline-offset: 3px; }

/* ------------------------------------------------- color-mix fallbacks */
/* Older engines do not support color-mix(); these give a sane fallback. */
@supports not (background: color-mix(in srgb, red 50%, blue)) {
  .site-header { background: var(--bg); }
  .hero-card .chip { background: rgba(255, 255, 255, 0.16); }
  .post-card__media .chip { background: #fff; color: var(--ink); }
  .category-tile { color: #fff; }
  .alert--success { background: #effaf4; }
  .alert--error { background: #fdf1ef; }
  .alert--warning { background: #fdf7ec; }
  .chip--accent { background: var(--accent-soft); }
  .prose a { text-decoration-color: var(--accent); }
  .prose mark { background: #dfe7ff; }
  [data-theme='dark'] .prose mark { background: #23305a; }
}

/* chart fallback for engines without color-mix() */
.chart__bar span { background: linear-gradient(180deg, var(--admin-accent) 0%, #9db3ff 100%); }
@supports (background: color-mix(in srgb, red 50%, blue)) {
  .chart__bar span { background: linear-gradient(180deg, var(--admin-accent), color-mix(in srgb, var(--admin-accent) 45%, #fff)); }
}


/* theme toggle: moon in light mode, sun in dark mode */
.ttx { display: inline-flex; }
.ttx--sun { display: none; }
[data-theme='dark'] .ttx--moon { display: none; }
[data-theme='dark'] .ttx--sun { display: inline-flex; }

/* ==========================================================================
   Theme cross-fade — a short, deliberate transition when the mode switches
   ========================================================================== */
html.theme-anim,
html.theme-anim body,
html.theme-anim .site-header,
html.theme-anim .site-footer,
html.theme-anim .panel,
html.theme-anim .card,
html.theme-anim .post-card,
html.theme-anim .section,
html.theme-anim h1,
html.theme-anim h2,
html.theme-anim h3,
html.theme-anim p,
html.theme-anim a,
html.theme-anim span,
html.theme-anim .chip,
html.theme-anim .btn,
html.theme-anim .icon-btn,
html.theme-anim .input {
  transition: background-color 420ms cubic-bezier(0.22, 1, 0.36, 1),
              color 420ms cubic-bezier(0.22, 1, 0.36, 1),
              border-color 420ms cubic-bezier(0.22, 1, 0.36, 1) !important;
}
@media (prefers-reduced-motion: reduce) {
  html.theme-anim,
  html.theme-anim body { transition-duration: 1ms !important; }
}