/* ==========================================================================
   OutperformerOS — shared site stylesheet
   Served at /assets/site.css
   Font files live at /fonts/ (one level up from /assets/)
   ========================================================================== */

/* ===== Web fonts ===== */
@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url("../fonts/InterVariable.woff2") format("woff2");
}
@font-face {
  font-family: "JetBrains Mono";
  font-style: normal;
  font-weight: 100 800;
  font-display: swap;
  src: url("../fonts/JetBrainsMono-Variable.woff2") format("woff2");
}

/* ===== Design tokens ===== */
:root {
  /* Color (HSL channel values — use with hsl()) */
  --background: 0 0% 6.7%;
  --foreground: 0 0% 100%;
  --card: 0 0% 12.2%;
  --card-foreground: 0 0% 100%;
  --border: 215 19% 27.8%;
  --ring: 51 100% 50%;
  --muted: 0 0% 12.2%;
  --muted-foreground: 215 16% 60%;
  --primary: 51 100% 50%;
  --primary-foreground: 0 0% 6.7%;
  --primary-600: #E6C200;
  --primary-700: #BFA300;
  --success-500: #10B981;

  /* Radii */
  --radius: 0.5rem;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --radius-xl: 12px;

  /* Typography */
  --font-sans: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  --text-xs:   0.75rem;
  --text-sm:   0.875rem;
  --text-base: 1rem;
  --text-lg:   1.125rem;
  --text-xl:   1.25rem;
  --text-2xl:  1.5rem;
  --text-3xl:  1.875rem;
  --text-4xl:  2.25rem;
  --text-5xl:  3rem;

  --leading-tight:   1.06;
  --leading-snug:    1.18;
  --leading-normal:  1.5;
  --leading-relaxed: 1.65;

  --tracking-tight:   -0.025em;
  --tracking-normal:   0em;
  --tracking-wide:     0.1em;
  --tracking-widest:   0.3em;

  /* Shadows */
  --shadow-sm:   0 1px 2px 0 rgb(0 0 0 / 0.25);
  --shadow-md:   0 4px 6px -1px rgb(0 0 0 / 0.35), 0 2px 4px -2px rgb(0 0 0 / 0.30);
  --shadow-lg:   0 10px 15px -3px rgb(0 0 0 / 0.40), 0 4px 6px -4px rgb(0 0 0 / 0.35);
  --shadow-glow: 0 0 25px rgba(255, 215, 0, 0.30);

  /* Layout */
  --max-w:          1200px;
  --reading-w:       720px;
  --gutter:          clamp(20px, 4vw, 48px);
  --section-pad-y:   clamp(72px, 11vw, 144px);
}

/* ===== Reset / base ===== */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html {
  color-scheme: dark;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}
body {
  font-family: var(--font-sans);
  background: hsl(var(--background));
  color: hsl(var(--foreground));
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-feature-settings: "ss01", "cv11";
  overflow-x: hidden;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }
::selection { background: hsl(var(--primary) / 0.25); color: hsl(var(--foreground)); }
:focus-visible {
  outline: 2px solid hsl(var(--ring));
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* ===== Layout helpers ===== */
.section {
  padding: var(--section-pad-y) var(--gutter);
  position: relative;
}
.section--tight { padding-top: clamp(48px, 8vw, 96px); padding-bottom: clamp(48px, 8vw, 96px); }
.container {
  max-width: var(--max-w);
  margin: 0 auto;
}
.container--reading {
  max-width: var(--reading-w);
  margin: 0 auto;
}
.section + .section {
  border-top: 1px solid hsl(var(--border) / 0.22);
}

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  background: hsl(var(--background) / 0.72);
  border-bottom: 1px solid hsl(var(--border) / 0.35);
}
.site-header__inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 18px var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.wordmark {
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: var(--text-lg);
  letter-spacing: -0.01em;
  color: hsl(var(--foreground));
  display: inline-flex;
  align-items: baseline;
  gap: 0;
}
.wordmark .accent { color: hsl(var(--primary)); }
.wordmark:focus-visible { outline-offset: 6px; }

.header-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 18px;
  border-radius: var(--radius-md);
  background: hsl(var(--primary));
  color: hsl(var(--primary-foreground));
  font-weight: 700;
  font-size: var(--text-sm);
  letter-spacing: 0.01em;
  border: 0;
  transition: background 180ms ease, transform 180ms ease, box-shadow 180ms ease;
}
.header-cta:hover { background: var(--primary-600); transform: translateY(-1px); box-shadow: var(--shadow-glow); }
.header-cta:active { background: var(--primary-700); transform: translateY(0); }

/* ===== Footer ===== */
.site-footer {
  border-top: 1px solid hsl(var(--border) / 0.3);
  padding: 40px var(--gutter);
  color: hsl(var(--muted-foreground));
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.02em;
}
.site-footer__inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.site-footer a:hover { color: hsl(var(--foreground)); }
.site-footer .legal {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  border: 0;
  border-radius: var(--radius-md);
  font-weight: 700;
  letter-spacing: 0.01em;
  transition: background 180ms ease, transform 180ms ease, box-shadow 220ms ease, opacity 180ms ease;
  text-align: center;
  white-space: nowrap;
}
.btn--cta {
  background: hsl(var(--primary));
  color: hsl(var(--primary-foreground));
  font-size: var(--text-base);
  padding: 16px 28px;
  box-shadow: 0 1px 0 rgb(255 215 0 / 0.4) inset, 0 8px 24px -10px rgb(255 215 0 / 0.45);
}
.btn--cta:hover {
  background: var(--primary-600);
  transform: translateY(-1px);
  box-shadow: 0 1px 0 rgb(255 215 0 / 0.6) inset, 0 12px 32px -10px rgb(255 215 0 / 0.55);
}
.btn--cta:active { background: var(--primary-700); transform: translateY(0); }
.btn--lg { font-size: var(--text-lg); padding: 18px 34px; }
.btn--block { display: flex; width: 100%; }

/* Secondary / ghost button */
.btn--ghost {
  background: transparent;
  color: hsl(var(--foreground));
  border: 1px solid hsl(var(--border) / 0.7);
  font-size: var(--text-base);
  padding: 14px 26px;
}
.btn--ghost:hover {
  border-color: hsl(var(--primary) / 0.5);
  color: hsl(var(--primary));
}

/* ===== Eyebrow ===== */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: var(--tracking-widest);
  color: hsl(var(--muted-foreground));
  margin: 0 0 28px 0;
}
.eyebrow .num { color: hsl(var(--primary)); font-weight: 600; }
.eyebrow .bar {
  width: 28px;
  height: 1px;
  background: hsl(var(--primary));
  display: inline-block;
}

/* ==========================================================================
   LONG-FORM ARTICLE STYLES
   Use .article-body as the wrapper around article prose content.
   Use .container--reading (max-width: var(--reading-w)) for the outer constraint.
   ========================================================================== */

/* Article page wrapper — adds vertical breathing room */
.article-page {
  padding-top: clamp(48px, 7vw, 88px);
  padding-bottom: clamp(64px, 10vw, 120px);
}

/* Article header / hero area */
.article-header {
  padding: clamp(48px, 7vw, 80px) var(--gutter) clamp(32px, 4vw, 48px);
  border-bottom: 1px solid hsl(var(--border) / 0.25);
}
.article-header__inner {
  max-width: var(--reading-w);
  margin: 0 auto;
}

/* Breadcrumb nav */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  color: hsl(var(--muted-foreground));
  margin: 0 0 28px 0;
  list-style: none;
  padding: 0;
  flex-wrap: wrap;
}
.breadcrumb li + li::before {
  content: "/";
  color: hsl(var(--border));
  margin-right: 8px;
}
.breadcrumb a:hover { color: hsl(var(--foreground)); }
.breadcrumb [aria-current="page"] { color: hsl(var(--foreground)); }

/* Article title */
.article-title {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: clamp(2rem, 4.5vw, 3.25rem);
  line-height: 1.1;
  letter-spacing: -0.025em;
  margin: 0 0 20px 0;
  text-wrap: balance;
  color: hsl(var(--foreground));
}

/* Lede / intro paragraph — visually distinct lead-in */
.lede {
  font-size: clamp(1.125rem, 1.8vw, 1.375rem);
  line-height: 1.55;
  color: hsl(var(--foreground));
  font-weight: 400;
  margin: 0 0 clamp(36px, 5vw, 56px) 0;
  max-width: 58ch;
  text-wrap: pretty;
  padding-bottom: clamp(24px, 3vw, 36px);
  border-bottom: 1px solid hsl(var(--border) / 0.3);
}

/* Article body prose — all child selectors are scoped to avoid bleed */
.article-body {
  font-size: clamp(1rem, 1.2vw, 1.125rem);
  line-height: var(--leading-relaxed);
  color: hsl(var(--muted-foreground));
  max-width: var(--reading-w);
  margin: 0 auto;
}

.article-body h1 {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: clamp(1.875rem, 3.5vw, 2.75rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: hsl(var(--foreground));
  margin: clamp(48px, 6vw, 72px) 0 20px 0;
  text-wrap: balance;
}
.article-body h1:first-child { margin-top: 0; }

.article-body h2 {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: clamp(1.375rem, 2.2vw, 1.875rem);
  line-height: 1.2;
  letter-spacing: -0.015em;
  color: hsl(var(--foreground));
  margin: clamp(40px, 5vw, 60px) 0 16px 0;
  text-wrap: balance;
}

.article-body h3 {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: clamp(1.125rem, 1.7vw, 1.375rem);
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: hsl(var(--foreground));
  margin: clamp(28px, 4vw, 44px) 0 12px 0;
  text-wrap: balance;
}

.article-body p {
  margin: 0 0 clamp(18px, 2.5vw, 24px) 0;
  text-wrap: pretty;
}
.article-body p:last-child { margin-bottom: 0; }

.article-body strong {
  color: hsl(var(--foreground));
  font-weight: 600;
}

.article-body em { font-style: italic; }

.article-body a {
  color: hsl(var(--primary));
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
  transition: color 150ms ease;
}
.article-body a:hover {
  color: var(--primary-600);
  text-decoration-thickness: 2px;
}

.article-body ul,
.article-body ol {
  padding-left: 1.5em;
  margin: 0 0 clamp(18px, 2.5vw, 24px) 0;
  display: grid;
  gap: 8px;
}
.article-body li { line-height: var(--leading-relaxed); }

.article-body ul { list-style: none; padding-left: 0; }
.article-body ul li {
  display: flex;
  align-items: baseline;
  gap: 12px;
}
.article-body ul li::before {
  content: "";
  flex: 0 0 5px;
  height: 5px;
  border-radius: 50%;
  background: hsl(var(--primary));
  margin-top: 0.55em;
}

.article-body ol { list-style: decimal; }
.article-body ol li { padding-left: 4px; }
.article-body ol li::marker {
  color: hsl(var(--primary));
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.article-body blockquote {
  margin: clamp(24px, 3.5vw, 40px) 0;
  padding: 20px 24px;
  border-left: 3px solid hsl(var(--primary));
  background: hsl(var(--card));
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-size: clamp(1.0625rem, 1.5vw, 1.25rem);
  line-height: 1.55;
  color: hsl(var(--foreground));
  font-style: normal;
}
.article-body blockquote p { margin: 0; }

.article-body code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background: hsl(var(--card));
  color: hsl(var(--primary));
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  border: 1px solid hsl(var(--border) / 0.5);
}

.article-body pre {
  margin: clamp(20px, 3vw, 32px) 0;
  padding: 20px 24px;
  background: hsl(var(--card));
  border: 1px solid hsl(var(--border) / 0.5);
  border-radius: var(--radius-md);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.article-body pre code {
  background: none;
  border: none;
  padding: 0;
  color: hsl(var(--foreground));
  font-size: var(--text-sm);
  line-height: 1.65;
}

.article-body hr {
  border: none;
  border-top: 1px solid hsl(var(--border) / 0.35);
  margin: clamp(36px, 5vw, 56px) 0;
}

/* Article CTA block — inline conversion surface */
.article-cta {
  margin: clamp(40px, 6vw, 64px) 0;
  padding: clamp(28px, 4vw, 40px);
  background: hsl(var(--card));
  border: 1px solid hsl(var(--border) / 0.5);
  border-radius: var(--radius-xl);
  border-left: 3px solid hsl(var(--primary));
}
.article-cta p {
  font-size: var(--text-base);
  color: hsl(var(--muted-foreground));
  margin: 0 0 20px 0;
}
.article-cta p:first-child {
  font-weight: 600;
  color: hsl(var(--foreground));
  font-size: var(--text-lg);
}

/* ==========================================================================
   BLOG HUB / CARD LIST STYLES
   Use .card-list as the <ul> wrapper; .post-card for each <li>.
   ========================================================================== */

.hub-intro {
  font-size: clamp(1.0625rem, 1.6vw, 1.25rem);
  line-height: var(--leading-relaxed);
  color: hsl(var(--muted-foreground));
  max-width: 52ch;
  margin: 0 0 clamp(40px, 6vw, 64px) 0;
  text-wrap: pretty;
}

.card-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: clamp(12px, 2vw, 20px);
}

.post-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: clamp(20px, 3vw, 28px) clamp(20px, 3vw, 28px);
  background: hsl(var(--card));
  border: 1px solid hsl(var(--border) / 0.4);
  border-radius: var(--radius-xl);
  transition: border-color 200ms ease, transform 200ms ease, box-shadow 200ms ease;
  text-decoration: none;
  color: inherit;
}
.post-card:hover {
  border-color: hsl(var(--primary) / 0.45);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.post-card:focus-visible {
  outline: 2px solid hsl(var(--ring));
  outline-offset: 3px;
}

.post-card__tag {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: var(--tracking-widest);
  color: hsl(var(--primary));
}

.post-card__title {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: clamp(1.0625rem, 1.6vw, 1.25rem);
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: hsl(var(--foreground));
  margin: 0;
  text-wrap: balance;
}

.post-card__desc {
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
  color: hsl(var(--muted-foreground));
  margin: 0;
}

.post-card__arrow {
  align-self: flex-start;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: hsl(var(--muted-foreground));
  letter-spacing: 0.04em;
  margin-top: 4px;
  transition: color 180ms ease, transform 180ms ease;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.post-card:hover .post-card__arrow {
  color: hsl(var(--primary));
  transform: translateX(3px);
}

/* Hub page CTA strip */
.hub-cta-strip {
  margin-top: clamp(48px, 7vw, 80px);
  padding-top: clamp(32px, 4vw, 48px);
  border-top: 1px solid hsl(var(--border) / 0.3);
  display: flex;
  flex-direction: column;
  gap: 16px;
  align-items: flex-start;
}
.hub-cta-strip p {
  font-size: var(--text-lg);
  color: hsl(var(--muted-foreground));
  margin: 0;
  max-width: 44ch;
  text-wrap: pretty;
}

/* ===== Reveal motion (scroll cascade) ===== */
.reveal {
  opacity: 0;
  transform: translate3d(0, 24px, 0);
  transition:
    opacity 900ms cubic-bezier(0.22, 1, 0.36, 1),
    transform 900ms cubic-bezier(0.22, 1, 0.36, 1);
  transition-delay: var(--reveal-delay, 0ms);
  will-change: opacity, transform;
}
.reveal--scale { transform: translate3d(0, 24px, 0) scale(0.98); }
.reveal.is-visible { opacity: 1; transform: translate3d(0, 0, 0) scale(1); }

/* ===== Mobile reflow ===== */
@media (max-width: 700px) {
  :root { --section-pad-y: clamp(56px, 13vw, 88px); }
  .header-cta { display: none; }
  .btn--lg { font-size: var(--text-base); padding: 15px 24px; }
  .hub-cta-strip { align-items: stretch; }
  .hub-cta-strip .btn { width: 100%; justify-content: center; }
  .article-body blockquote { padding: 16px 18px; }
}

@media (min-width: 701px) {
  .header-cta { display: inline-flex; }
}

/* ===== Reduced motion — non-negotiable ===== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .reveal {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
}