/* =====================================================================
   EasyZIPCodes — app.css
   Light, modern data-product theme. Plain CSS, no build step.
   Fonts are self-hosted under /static/fonts (CSP: font-src falls back
   to default-src 'self', so only same-origin fonts load).
   ===================================================================== */

/* --- Self-hosted fonts --------------------------------------------- */
@font-face {
  font-family: "Space Grotesk";
  font-style: normal;
  font-weight: 400 700;            /* variable axis */
  font-display: swap;
  src: url("../fonts/space-grotesk-var-latin.woff2") format("woff2");
}
@font-face {
  font-family: "IBM Plex Mono";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("../fonts/ibm-plex-mono-400-latin.woff2") format("woff2");
}
@font-face {
  font-family: "IBM Plex Mono";
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url("../fonts/ibm-plex-mono-600-latin.woff2") format("woff2");
}

/* --- Tokens --------------------------------------------------------- */
:root {
  /* Color palette (light) */
  --color-bg:          #f4f6f6;   /* page background */
  --color-surface:     #ffffff;   /* cards */
  --color-surface-2:   #f7fafa;   /* inset fields */
  --color-border:      rgba(11, 31, 42, 0.08);
  --color-border-2:    rgba(11, 31, 42, 0.14);
  --color-line:        rgba(11, 31, 42, 0.09);
  --color-ink:         #0b1f2a;   /* near-black navy (headings/buttons) */
  --color-text:        #2a3942;   /* body text */
  --color-muted:       #56646b;   /* sub-headlines */
  --color-label:       #7a8a92;   /* mono labels */
  --color-label-soft:  #9aa8ae;   /* faint mono (prefix, "Try:") */
  --color-chip:        #3a4d55;   /* chip text */

  --color-accent:      #0e9c8e;   /* teal/emerald */
  --color-accent-ink:  #0b6b61;   /* dark green text */
  --color-accent-tint: rgba(14, 156, 142, 0.10);
  --color-accent-line: rgba(14, 156, 142, 0.30);

  /* Typography */
  --font-sans: "Space Grotesk", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;

  --text-xs:   0.75rem;
  --text-sm:   0.875rem;
  --text-base: 1rem;
  --text-lg:   1.125rem;
  --text-xl:   clamp(1.3rem, 3vw, 1.6rem);
  --text-2xl:  clamp(1.7rem, 4vw, 2.1rem);
  --text-hero: clamp(2.4rem, 6vw, 4rem);

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-8: 3rem;
  --space-10: 4rem;

  /* Layout */
  --max-width: 73.75rem;          /* 1180px, matches the mock */
  --radius:    0.5rem;
  --radius-md: 0.8125rem;         /* 13px — inputs/buttons */
  --radius-lg: 1rem;              /* 16px — stat tiles */
  --radius-xl: 1.5rem;            /* 24px — hero card */

  --shadow-card:  0 1px 2px rgba(8, 22, 30, 0.04);
  --shadow-hero:  0 30px 80px -50px rgba(8, 22, 30, 0.35);
  --shadow-seg:   0 1px 2px rgba(8, 22, 30, 0.12);

  --transition: 150ms ease;
}

/* --- Reset ---------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* --- Base ----------------------------------------------------------- */
html { font-size: 16px; scroll-behavior: smooth; }

body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: var(--color-accent-ink); text-decoration: none; }
a:hover { color: var(--color-accent); text-decoration: underline; }

h1, h2, h3 { color: var(--color-ink); letter-spacing: -0.02em; }
h1 { font-size: var(--text-2xl); font-weight: 700; line-height: 1.15; margin-bottom: var(--space-4); }
h2 { font-size: var(--text-xl);  font-weight: 700; line-height: 1.25; margin-bottom: var(--space-3); margin-top: var(--space-6); }
h3 { font-size: var(--text-lg);  font-weight: 600; margin-bottom: var(--space-2); margin-top: var(--space-4); }

p { margin-bottom: var(--space-4); }

ul, ol { padding-left: var(--space-5); margin-bottom: var(--space-4); }
li { margin-bottom: var(--space-1); }

code, pre {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  color: var(--color-ink);
}
code { padding: 0.12em 0.4em; }
pre  { padding: var(--space-4); overflow-x: auto; margin-bottom: var(--space-4); }
pre code { background: none; border: none; padding: 0; }

table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: var(--space-5);
  font-size: var(--text-sm);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
th, td {
  padding: var(--space-3) var(--space-4);
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}
th {
  background: var(--color-surface-2);
  color: var(--color-label);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover td { background: var(--color-surface-2); }
td code { font-size: var(--text-xs); }

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

/* --- Layout --------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

/* Text-heavy pages get a narrower, more readable measure. */
.prose { max-width: 56rem; }

/* --- Header (sticky top bar) --------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(244, 246, 246, 0.82);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-line);
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: 14px var(--space-6);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  color: var(--color-ink);
}
.brand:hover { color: var(--color-ink); text-decoration: none; }
.brand__dot {
  width: 11px; height: 11px;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 0 4px rgba(14, 156, 142, 0.16);
  flex: none;
}
.brand__name {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: -0.02em;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}
.site-nav__link {
  padding: var(--space-2) 14px;
  border-radius: var(--radius);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-ink);
}
.site-nav__link:hover {
  background: rgba(11, 31, 42, 0.06);
  color: var(--color-ink);
  text-decoration: none;
}
.site-nav__cta {
  margin-left: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius);
  font-size: var(--text-sm);
  font-weight: 600;
  background: var(--color-ink);
  color: #fff;
}
.site-nav__cta:hover { background: var(--color-accent); color: #fff; text-decoration: none; }

/* --- Main / Footer -------------------------------------------------- */
main { flex: 1; padding: var(--space-8) 0; }

footer {
  border-top: 1px solid var(--color-line);
  padding: var(--space-6) 0;
  font-size: var(--text-sm);
  color: var(--color-label);
}
footer .container { display: flex; flex-direction: column; gap: var(--space-2); }
footer a { color: var(--color-label); }
footer a:hover { color: var(--color-accent); }

/* =====================================================================
   Search box (shared: home hero + /search page)
   ===================================================================== */
.zip-search {
  display: flex;
  gap: 10px;
  align-items: stretch;
  width: 100%;
  max-width: 35rem;
}
.zip-search__field { position: relative; flex: 1; }
.zip-search__input {
  width: 100%;
  padding: 18px;
  border-radius: var(--radius-md);
  border: 1.5px solid #d5dddd;
  background: var(--color-surface-2);
  color: var(--color-ink);
  font-family: var(--font-mono);
  font-size: 1.25rem;
  letter-spacing: 0.08em;
  outline: none;
  transition: border-color var(--transition), background var(--transition);
  -webkit-appearance: none;
  appearance: none;
}
.zip-search__input::placeholder { color: var(--color-label-soft); }
.zip-search__input:focus {
  border-color: var(--color-accent);
  background: #fff;
  box-shadow: 0 0 0 3px var(--color-accent-tint);
}

.zip-search__btn {
  display: inline-flex;
  align-items: center;
  padding: 0 28px;
  border: none;
  border-radius: var(--radius-md);
  background: var(--color-ink);
  color: #fff;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 1rem;
  white-space: nowrap;
  cursor: pointer;
  transition: background var(--transition);
}
.zip-search__btn:hover { background: var(--color-accent); }

/* =====================================================================
   Home
   ===================================================================== */
/* Audience switcher (segmented toggle) */
.audience {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  padding: var(--space-5) var(--space-5) var(--space-1);
  flex-wrap: wrap;
}
.audience__label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-label);
}
.segmented {
  display: inline-flex;
  gap: var(--space-1);
  padding: var(--space-1);
  background: #e7ecec;
  border-radius: 11px;
}
.segmented__seg {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius);
  font-size: 0.84375rem;
  font-weight: 600;
  color: var(--color-muted);
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
}
.segmented__seg:hover { color: var(--color-ink); text-decoration: none; }
.segmented__seg.is-active {
  background: #fff;
  color: var(--color-ink);
  box-shadow: var(--shadow-seg);
}
.segmented__icon { font-size: 0.9375rem; line-height: 1; }
.segmented__icon--mono { font-family: var(--font-mono); font-size: 0.8125rem; }

/* Hero card */
.home-hero { padding-top: var(--space-5); padding-bottom: var(--space-5); }

.hero-card {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-xl);
  background: var(--color-surface);
  color: var(--color-ink);
  padding: clamp(2.5rem, 5vw, 4.625rem) clamp(1.5rem, 4vw, 3.5rem) clamp(2.5rem, 4vw, 4rem);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-hero);
}
.hero-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(14, 156, 142, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(14, 156, 142, 0.07) 1px, transparent 1px);
  background-size: 40px 40px;
  opacity: 0.9;
  animation: ezDrift 14s linear infinite;
  pointer-events: none;
}
.hero-card::after {
  content: "";
  position: absolute;
  right: -80px;
  top: -60px;
  width: 360px;
  height: 360px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(14, 156, 142, 0.16), transparent 65%);
  pointer-events: none;
}
.hero-card__body { position: relative; }

@keyframes ezDrift {
  from { background-position: 0 0; }
  to   { background-position: 40px 40px; }
}
@media (prefers-reduced-motion: reduce) {
  .hero-card::before { animation: none; }
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 6px 13px;
  border-radius: 999px;
  background: var(--color-accent-tint);
  border: 1px solid var(--color-accent-line);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--color-accent-ink);
}
.badge__dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 8px rgba(14, 156, 142, 0.6);
  flex: none;
}

.hero-title {
  font-size: var(--text-hero);
  line-height: 1.02;
  font-weight: 700;
  letter-spacing: -0.03em;
  max-width: 47.5rem;
  margin: var(--space-5) 0 0;
  color: var(--color-ink);
}
.hero-sub {
  font-size: clamp(1.05rem, 2.2vw, 1.1875rem);
  line-height: 1.55;
  color: var(--color-muted);
  max-width: 35rem;
  margin: var(--space-5) 0 0;
}
.home-hero .zip-search { margin-top: var(--space-6); }

.try-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: var(--space-5);
}
.try-row__label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-label-soft);
}
.chip {
  padding: 5px 12px;
  border-radius: 999px;
  border: 1px solid var(--color-border-2);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--color-chip);
  transition: border-color var(--transition), color var(--transition);
}
.chip:hover { border-color: var(--color-accent); color: var(--color-accent); text-decoration: none; }

/* Stat strip */
.stat-strip {
  display: grid;
  /* auto-fit so the row stays balanced whether 3 or 4 tiles are shown */
  grid-template-columns: repeat(auto-fit, minmax(10rem, 1fr));
  gap: var(--space-4);
  margin-top: var(--space-5);
}
.stat-tile {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
}
.stat-tile__num {
  font-size: clamp(1.75rem, 3vw, 2.125rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-ink);
}
.stat-tile__label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-label);
  margin-top: var(--space-1);
}

/* Area Profile (ZIP detail) — muted source caption tucked under the heading. */
.area-profile__src {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-label);
  margin-top: calc(-1 * var(--space-2));
}

/* =====================================================================
   ZIP detail
   ===================================================================== */
.zip-header {
  padding-bottom: var(--space-5);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-5);
}
.zip-header h1 { margin-bottom: var(--space-2); }
.zip-meta { font-size: var(--text-lg); color: var(--color-muted); }
.zip-meta strong { color: var(--color-ink); }

.zip-map {
  margin: var(--space-5) 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-surface);
}
.zip-map__canvas {
  background: var(--color-surface-2);
  min-height: 240px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}
.zip-map figcaption {
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  color: var(--color-muted);
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  font-family: var(--font-mono);
}
.zip-map__loading,
.zip-map__error {
  font-size: var(--text-sm);
  color: var(--color-muted);
  padding: 0 var(--space-4);
  text-align: center;
}
.zip-map__canvas .leaflet-container { min-height: 300px; }

.poi-section { margin-top: var(--space-6); }
.poi-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(10rem, 1fr));
  gap: var(--space-2);
  list-style: none;
  padding: 0;
  margin-bottom: var(--space-5);
}
.poi-list li {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-3);
  font-size: var(--text-sm);
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0;
}
.poi-list li::after {
  content: attr(data-count);
  color: var(--color-accent-ink);
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: var(--text-xs);
}

.brand-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(12rem, 1fr));
  gap: var(--space-1) var(--space-4);
  list-style: none;
  padding: 0;
  margin-bottom: var(--space-5);
  font-size: var(--text-sm);
  color: var(--color-muted);
}

/* =====================================================================
   Search results
   ===================================================================== */
.search-results { list-style: none; padding: 0; margin-top: var(--space-5); }
.search-results li { border-bottom: 1px solid var(--color-border); margin-bottom: 0; }
.search-results li a {
  display: block;
  padding: var(--space-3) var(--space-2);
  font-size: var(--text-lg);
  color: var(--color-ink);
  transition: color var(--transition);
}
.search-results li a:hover { color: var(--color-accent); text-decoration: none; }

/* =====================================================================
   Download
   ===================================================================== */
.download-btn {
  display: inline-block;
  padding: var(--space-3) var(--space-6);
  background: var(--color-ink);
  color: #fff;
  border-radius: var(--radius-md);
  font-weight: 700;
  font-size: var(--text-lg);
  margin-bottom: var(--space-5);
  transition: background var(--transition);
}
.download-btn:hover { background: var(--color-accent); color: #fff; text-decoration: none; }

/* =====================================================================
   API docs
   ===================================================================== */
nav[data-tabs] {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  padding: var(--space-1);
  background: #e7ecec;
  border-radius: 11px;
  margin: var(--space-5) 0;
  width: fit-content;
}
nav[data-tabs] button {
  padding: var(--space-2) var(--space-4);
  border: none;
  border-radius: var(--radius);
  background: transparent;
  color: var(--color-muted);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
}
nav[data-tabs] button:hover { color: var(--color-ink); }
nav[data-tabs] button[aria-current="page"] {
  background: #fff;
  color: var(--color-ink);
  box-shadow: var(--shadow-seg);
}

.api-section {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5) var(--space-6);
  margin-bottom: var(--space-5);
  box-shadow: var(--shadow-card);
}
.api-section h2 { margin-top: 0; }
.code-example { position: relative; }
.code-copy {
  position: absolute;
  top: var(--space-2);
  right: var(--space-2);
  padding: var(--space-1) var(--space-3);
  border: 1px solid var(--color-border-2);
  border-radius: var(--radius);
  background: var(--color-surface);
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  cursor: pointer;
  transition: color var(--transition), border-color var(--transition);
}
.code-copy:hover { color: var(--color-accent); border-color: var(--color-accent); }

/* =====================================================================
   Error pages
   ===================================================================== */
.error-page { text-align: center; padding: var(--space-10) 0; }
.error-page h1 {
  font-size: var(--text-hero);
  color: var(--color-ink);
  font-weight: 700;
  letter-spacing: -0.03em;
}
.error-page p { font-size: var(--text-lg); color: var(--color-muted); }

/* =====================================================================
   Responsive
   ===================================================================== */
@media (max-width: 60rem) {
  .stat-strip { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 40rem) {
  .container { padding: 0 var(--space-4); }
  main { padding: var(--space-5) 0; }
  .site-header__inner { padding: 12px var(--space-4); }
  .site-nav__link { display: none; }          /* keep brand + CTA on mobile; footer holds the links */

  .zip-search { flex-direction: column; }
  .zip-search__btn { justify-content: center; padding: var(--space-4); }

  .api-section { padding: var(--space-4); }
  .poi-list { grid-template-columns: repeat(auto-fill, minmax(8rem, 1fr)); }
}

/* ---- Key places + Wikipedia about (zip detail) ---- */
.about-section p {
  max-width: 56rem;
}
.about-attribution {
  font-size: var(--text-sm);
  color: var(--color-muted);
}
.key-places-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(14rem, 1fr));
  gap: var(--space-2);
  list-style: none;
  padding: 0;
  margin-bottom: var(--space-5);
}
.key-places-list li {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-3);
  font-size: var(--text-sm);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: 0;
}
.place-category {
  color: var(--color-accent-ink);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  white-space: nowrap;
}
.key-places-nearby h2 {
  color: var(--color-muted);
}