/* ==========================================================================
   MY HOT RADAR — Global Stylesheet
   Mobile-first, system fonts, BEM-ish naming.
   ========================================================================== */

/* ---------- Design Tokens ---------- */
:root {
  /* Colors */
  --color-bg: #ffffff;
  --color-surface: #ffffff;
  --color-surface-alt: #f7f7f8;
  --color-ink: #0a0a0a;
  --color-ink-soft: #2b2b2f;
  --color-muted: #6b7280;
  --color-line: #e5e7eb;
  --color-line-strong: #d4d4d8;

  --color-accent: #e11d2a;       /* "HOT" red */
  --color-accent-soft: #fff1f2;
  --color-rising: #f59e0b;       /* "RISING" amber */
  --color-rising-soft: #fff7ed;
  --color-breaking: #dc2626;     /* "BREAKING" deeper red */
  --color-cooling: #6b7280;      /* "COOLING" muted gray */
  --color-cooling-soft: #f3f4f6;

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
               "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  --font-display: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
                  "Helvetica Neue", Arial, sans-serif;

  --fs-12: 0.75rem;
  --fs-14: 0.875rem;
  --fs-16: 1rem;
  --fs-18: 1.125rem;
  --fs-20: 1.25rem;
  --fs-24: 1.5rem;
  --fs-28: 1.75rem;
  --fs-32: 2rem;
  --fs-40: 2.5rem;

  /* Spacing */
  --sp-1: 0.25rem;
  --sp-2: 0.5rem;
  --sp-3: 0.75rem;
  --sp-4: 1rem;
  --sp-5: 1.25rem;
  --sp-6: 1.5rem;
  --sp-8: 2rem;
  --sp-10: 2.5rem;
  --sp-12: 3rem;
  --sp-16: 4rem;

  /* Radius / Shadow */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-pill: 999px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 14px rgba(0,0,0,0.06);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.08);

  /* Layout */
  --container: 1180px;
  --container-narrow: 760px;

  --header-h: 60px;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body, h1, h2, h3, h4, h5, h6, p, figure, blockquote, ul, ol {
  margin: 0;
  padding: 0;
}
ul, ol { list-style: none; }
img, svg { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }

/* ---------- Base ---------- */
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  font-size: var(--fs-16);
  line-height: 1.55;
  color: var(--color-ink);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

::selection { background: var(--color-accent); color: #fff; }

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* ---------- Layout helpers ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--sp-4);
}
.container--narrow {
  max-width: var(--container-narrow);
}
.section { padding-block: var(--sp-10); }
.section--tight { padding-block: var(--sp-6); }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255,255,255,0.92);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--color-line);
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
  gap: var(--sp-4);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--color-ink);
}
.brand__mark {
  width: 30px;
  height: 30px;
  color: var(--color-ink);
  flex-shrink: 0;
}
.brand__name {
  font-size: var(--fs-18);
  white-space: nowrap;
}
.brand__name em {
  font-style: normal;
  color: var(--color-accent);
}

.nav-primary {
  display: none;
}
.nav-primary__list {
  display: flex;
  gap: var(--sp-6);
}
.nav-primary__link {
  font-size: var(--fs-14);
  font-weight: 600;
  color: var(--color-ink-soft);
  padding-block: var(--sp-2);
  transition: color 0.15s ease;
}
.nav-primary__link:hover,
.nav-primary__link[aria-current="page"] {
  color: var(--color-accent);
}

.nav-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--color-line);
  background: var(--color-surface);
  border-radius: var(--radius-sm);
  color: var(--color-ink);
}
.nav-toggle__bar,
.nav-toggle__bar::before,
.nav-toggle__bar::after {
  content: "";
  display: block;
  width: 18px;
  height: 2px;
  background: currentColor;
  transition: transform 0.2s ease, opacity 0.2s ease;
}
.nav-toggle__bar { position: relative; }
.nav-toggle__bar::before { position: absolute; top: -6px; }
.nav-toggle__bar::after  { position: absolute; top:  6px; }

.mobile-nav {
  display: none;
  border-top: 1px solid var(--color-line);
  background: var(--color-surface);
}
.mobile-nav.is-open { display: block; }
.mobile-nav__list {
  display: flex;
  flex-direction: column;
  padding: var(--sp-2) var(--sp-4) var(--sp-4);
}
.mobile-nav__link {
  display: block;
  padding: var(--sp-3) 0;
  font-size: var(--fs-16);
  font-weight: 600;
  color: var(--color-ink-soft);
  border-bottom: 1px solid var(--color-line);
}
.mobile-nav__link:last-child { border-bottom: 0; }

@media (min-width: 900px) {
  .nav-primary { display: block; }
  .nav-toggle { display: none; }
}

/* ---------- Status badge ---------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  font-size: var(--fs-12);
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  border-radius: var(--radius-pill);
  line-height: 1;
  white-space: nowrap;
}
.badge::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}
.badge--hot      { background: var(--color-accent); color: #fff; }
.badge--rising   { background: var(--color-rising); color: #1a1a1a; }
.badge--breaking { background: var(--color-breaking); color: #fff; }
.badge--cooling  { background: var(--color-cooling-soft); color: var(--color-cooling); }
.badge--sample   { background: #f4f4f5; color: #52525b; }

/* ---------- Card ---------- */
.card {
  display: flex;
  flex-direction: column;
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}
.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-line-strong);
}
.card__media {
  aspect-ratio: 16 / 10;
  background: linear-gradient(135deg, #fafafa 0%, #ececef 100%);
  position: relative;
  overflow: hidden;
}
.card__media svg {
  width: 100%;
  height: 100%;
  opacity: 0.5;
}
.card__body {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
  padding: var(--sp-5);
  flex: 1;
}
.card__meta {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  font-size: var(--fs-12);
  color: var(--color-muted);
  flex-wrap: wrap;
}
.card__cat {
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 700;
  color: var(--color-ink-soft);
}
.card__title {
  font-family: var(--font-display);
  font-size: var(--fs-20);
  font-weight: 700;
  line-height: 1.25;
  color: var(--color-ink);
  letter-spacing: -0.01em;
}
.card__title a:hover { color: var(--color-accent); }
.card__excerpt {
  font-size: var(--fs-14);
  color: var(--color-ink-soft);
  line-height: 1.55;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.card__footer {
  margin-top: auto;
  padding-top: var(--sp-3);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--fs-12);
  color: var(--color-muted);
}

@media (min-width: 700px) {
  .card__title { font-size: var(--fs-24); }
}

/* Card variants */
.card--featured {
  border-color: transparent;
}
.card--featured .card__media { aspect-ratio: 16 / 9; }
.card--featured .card__title { font-size: var(--fs-24); }
@media (min-width: 700px) {
  .card--featured .card__title { font-size: var(--fs-32); }
}

/* ---------- Card grid ---------- */
.grid {
  display: grid;
  gap: var(--sp-5);
  grid-template-columns: 1fr;
}
@media (min-width: 700px) {
  .grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1024px) {
  .grid--3 { grid-template-columns: repeat(3, 1fr); }
}

/* ---------- Section heading ---------- */
.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--sp-4);
  margin-bottom: var(--sp-6);
  padding-bottom: var(--sp-3);
  border-bottom: 1px solid var(--color-line);
}
.section-head__title {
  font-family: var(--font-display);
  font-size: var(--fs-24);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--color-ink);
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
}
.section-head__title .icon-flame { color: var(--color-accent); }
.section-head__more {
  font-size: var(--fs-14);
  font-weight: 600;
  color: var(--color-ink-soft);
}
.section-head__more:hover { color: var(--color-accent); }

/* ---------- Eyebrow / Page title ---------- */
.page-eyebrow {
  display: inline-block;
  font-size: var(--fs-12);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-accent);
  margin-bottom: var(--sp-3);
}
.page-title {
  font-family: var(--font-display);
  font-size: var(--fs-32);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.1;
  color: var(--color-ink);
}
.page-lede {
  margin-top: var(--sp-3);
  font-size: var(--fs-18);
  color: var(--color-ink-soft);
  max-width: 60ch;
}
@media (min-width: 700px) {
  .page-title { font-size: var(--fs-40); }
}

/* ---------- Advertisement placeholder ---------- */
.ad-slot {
  margin: var(--sp-6) 0;
  padding: var(--sp-6) var(--sp-4);
  background: repeating-linear-gradient(
    45deg,
    var(--color-surface-alt),
    var(--color-surface-alt) 12px,
    #f0f0f2 12px,
    #f0f0f2 24px
  );
  border: 1px dashed var(--color-line-strong);
  border-radius: var(--radius-md);
  text-align: center;
  color: var(--color-muted);
  font-size: var(--fs-12);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-weight: 600;
}
.ad-slot--inline { margin-block: var(--sp-5); }
.ad-slot--leaderboard {
  margin-block: var(--sp-4);
  padding-block: var(--sp-8);
}

/* ---------- Footer disclaimer ---------- */
.mvp-note {
  background: var(--color-surface-alt);
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
  padding-block: var(--sp-4);
}
.mvp-note__inner {
  font-size: var(--fs-12);
  color: var(--color-muted);
  text-align: center;
  max-width: 720px;
  margin-inline: auto;
}

/* ---------- Footer ---------- */
.site-footer {
  background: #0a0a0a;
  color: #d4d4d8;
  padding-block: var(--sp-10);
  margin-top: var(--sp-12);
}
.site-footer__inner {
  display: grid;
  gap: var(--sp-8);
}
.site-footer__brand {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-3);
  color: #fff;
  font-weight: 800;
  font-size: var(--fs-18);
}
.site-footer__brand .brand__mark { color: #fff; }
.site-footer__tagline {
  margin-top: var(--sp-3);
  font-size: var(--fs-14);
  color: #a1a1aa;
  max-width: 36ch;
  line-height: 1.5;
}
.site-footer__col h4,
.site-footer__heading {
  font-size: var(--fs-12);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: #fff;
  margin-bottom: var(--sp-3);
  font-weight: 700;
}
.site-footer__list li { margin-bottom: var(--sp-2); }
.site-footer__link {
  font-size: var(--fs-14);
  color: #a1a1aa;
  transition: color 0.15s ease;
}
.site-footer__link:hover { color: #fff; }
.site-footer__bottom {
  margin-top: var(--sp-8);
  padding-top: var(--sp-5);
  border-top: 1px solid #27272a;
  font-size: var(--fs-12);
  color: #71717a;
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
}
@media (min-width: 700px) {
  .site-footer__inner { grid-template-columns: 2fr 1fr 1fr 1fr; gap: var(--sp-10); }
  .site-footer__bottom { flex-direction: row; justify-content: space-between; }
}

/* ---------- Prose (long-form text pages) ---------- */
.prose > * + * { margin-top: var(--sp-4); }
.prose h2 {
  font-family: var(--font-display);
  font-size: var(--fs-20);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--color-ink);
  margin-top: var(--sp-8);
  padding-bottom: var(--sp-2);
  border-bottom: 1px solid var(--color-line);
}
@media (min-width: 700px) {
  .prose h2 { font-size: var(--fs-24); }
}
.prose h3 {
  font-family: var(--font-display);
  font-size: var(--fs-18);
  font-weight: 700;
  color: var(--color-ink);
  margin-top: var(--sp-6);
}
.prose p {
  font-size: var(--fs-16);
  line-height: 1.7;
  color: var(--color-ink-soft);
}
.prose p strong { color: var(--color-ink); }
.prose ul {
  list-style: disc;
  padding-left: var(--sp-5);
  color: var(--color-ink-soft);
}
.prose ul li { margin-top: var(--sp-2); }
.prose a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}
.prose a:hover { color: var(--color-ink); }
.prose .prose-meta {
  font-size: var(--fs-12);
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--sp-6);
}

/* ---------- Article (single story) ---------- */
.article-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--sp-3);
  margin-top: var(--sp-4);
  font-size: var(--fs-12);
  color: var(--color-muted);
}
.article-meta__time { white-space: nowrap; }
.article-meta__sep   { color: var(--color-line-strong); }

.article-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-bottom: var(--sp-5);
  font-size: var(--fs-14);
  font-weight: 600;
  color: var(--color-ink-soft);
}
.article-back:hover { color: var(--color-accent); }

.article-hero {
  margin-top: var(--sp-6);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-line);
  background: var(--color-surface-alt);
}
.article-hero svg {
  display: block;
  width: 100%;
  height: auto;
}

.article-byline {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  margin-top: var(--sp-6);
  padding-top: var(--sp-5);
  border-top: 1px solid var(--color-line);
  font-size: var(--fs-14);
  color: var(--color-muted);
  flex-wrap: wrap;
}
.article-byline strong { color: var(--color-ink); font-weight: 700; }

.article-share {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-3);
  margin-top: var(--sp-6);
  padding-top: var(--sp-5);
  border-top: 1px solid var(--color-line);
}
.article-share__label {
  font-size: var(--fs-12);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-muted);
  align-self: center;
  margin-right: var(--sp-2);
}
.share-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-pill);
  background: var(--color-surface);
  font-size: var(--fs-14);
  font-weight: 600;
  color: var(--color-ink-soft);
  transition: border-color 0.15s ease, color 0.15s ease, background 0.15s ease;
}
.share-btn:hover {
  border-color: var(--color-ink);
  color: var(--color-ink);
}
.share-btn svg { width: 16px; height: 16px; flex-shrink: 0; }

.article-source {
  margin-top: var(--sp-6);
  padding: var(--sp-4);
  background: var(--color-surface-alt);
  border-radius: var(--radius-md);
  font-size: var(--fs-14);
  color: var(--color-muted);
}
.article-source strong { color: var(--color-ink); }

.related-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--sp-4);
  margin-bottom: var(--sp-6);
  padding-bottom: var(--sp-3);
  border-bottom: 1px solid var(--color-line);
}
.related-head h2 {
  font-family: var(--font-display);
  font-size: var(--fs-24);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--color-ink);
}

@media (max-width: 480px) {
  .share-btn span { display: none; }
  .share-btn { padding: 8px 10px; }
}

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

.text-muted { color: var(--color-muted); }
.text-soft  { color: var(--color-ink-soft); }

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}