/* =========================================================================
   Burbank Amateur Radio Club (BARC) — stylesheet
   -------------------------------------------------------------------------
   Goal: clean, accessible HTML5/CSS with a retro HAM-radio aesthetic
   (warm paper tones, masthead serifs, callsign monospace, schematic blue)
   tempered by modern layout, spacing, and focus handling.
   ========================================================================= */

/* ---- 1. Design tokens --------------------------------------------------- */
:root {
  /* Palette: warm paper + schematic blue + shiba rust */
  --c-bg:        #f3e8d2;   /* warm cream "paper" */
  --c-surface:   #fbf3e0;   /* slightly lighter card */
  --c-surface-2: #efe0c2;   /* sidebar / inset */
  --c-ink:       #1a2330;   /* near-black for text */
  --c-ink-soft:  #3a4656;
  --c-muted:     #6b5c46;
  --c-primary:   #1f4f7a;   /* schematic / old-ink blue */
  --c-primary-d: #15395a;
  --c-accent:    #c75b2a;   /* shiba rust (decorative / backgrounds) */
  --c-accent-d:  #8a3c18;   /* darker rust for small text (WCAG AA-safe on cream) */
  --c-mustard:   #d8a32b;
  --c-rule:      #c9b791;   /* hairline rule the color of aged paper */

  /* Type */
  --ff-serif:  Georgia, "Iowan Old Style", "Palatino Linotype", Palatino, serif;
  --ff-sans:   -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --ff-mono:   "SFMono-Regular", ui-monospace, Menlo, Consolas, "Courier New", monospace;

  /* Rhythm */
  --fs-base:   1rem;         /* 16px */
  --lh-base:   1.6;
  --space-1:   0.25rem;
  --space-2:   0.5rem;
  --space-3:   0.75rem;
  --space-4:   1rem;
  --space-6:   1.5rem;
  --space-8:   2rem;
  --space-12:  3rem;

  --radius:    4px;
  --max-w:     68rem;
}

/* ---- 2. Reset-ish base -------------------------------------------------- */
*,
*::before,
*::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

body {
  margin: 0;
  font-family: var(--ff-sans);
  font-size: var(--fs-base);
  line-height: var(--lh-base);
  color: var(--c-ink);
  background-color: var(--c-bg);
  /* Subtle "old paper" gradient — no image required */
  background-image:
    radial-gradient(circle at 20% 0%, rgba(255,255,255,0.55), transparent 60%),
    radial-gradient(circle at 80% 100%, rgba(199,91,42,0.08), transparent 55%);
  background-attachment: fixed;
}

img, svg { max-width: 100%; height: auto; display: block; }

/* ---- 3. Typography ------------------------------------------------------ */
h1, h2, h3, h4 {
  font-family: var(--ff-serif);
  color: var(--c-ink);
  line-height: 1.2;
  margin: 0 0 var(--space-4);
  letter-spacing: 0.01em;
}
h1 { font-size: clamp(1.75rem, 2.4vw + 1rem, 2.75rem); }
h2 { font-size: clamp(1.4rem, 1.4vw + 1rem, 1.9rem); }
h3 { font-size: 1.25rem; }

p { margin: 0 0 var(--space-4); }

a {
  color: var(--c-primary);
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}
a:hover { color: var(--c-primary-d); }
a:focus-visible {
  outline: 3px solid var(--c-mustard);
  outline-offset: 2px;
  border-radius: 2px;
}

/* Monospace for technical radio data (callsigns, frequencies, grid squares) */
.mono,
code,
kbd { font-family: var(--ff-mono); }

/* ---- 4. Accessibility helpers ------------------------------------------ */

/* Skip link, visible only on focus */
.skip-link {
  position: absolute;
  left: var(--space-2);
  top: -3rem;
  background: var(--c-ink);
  color: var(--c-bg);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius);
  z-index: 100;
  text-decoration: none;
}
.skip-link:focus { top: var(--space-2); }

/* Visually hidden but still available to screen readers */
.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;
}

/* ---- 5. Layout shell --------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: var(--space-4);
}

main {
  padding-block: var(--space-8) var(--space-12);
}

/* ---- 6. Masthead / header ---------------------------------------------- */
.masthead {
  background: var(--c-surface);
  border-bottom: 4px double var(--c-primary);
}
.masthead__inner {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  padding-block: var(--space-4);
  flex-wrap: wrap;
}

/* Logo block: SVG framed like an old license plate / QSL card */
.brand {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  text-decoration: none;
  color: inherit;
}
.brand__mark {
  width: 92px;
  height: auto;
  background: var(--c-surface-2);
  border: 2px solid var(--c-ink);
  padding: var(--space-2);
  border-radius: var(--radius);
  box-shadow: 3px 3px 0 var(--c-ink);
}
.brand__name {
  font-family: var(--ff-serif);
  font-weight: 700;
  font-size: clamp(1.3rem, 1.2vw + 1rem, 1.7rem);
  line-height: 1.1;
  margin: 0;
}
.brand__call {
  font-family: var(--ff-mono);
  font-size: 0.85rem;
  color: var(--c-accent-d);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-top: var(--space-1);
}

/* ---- 7. Primary navigation --------------------------------------------- */
.nav {
  margin-left: auto;
}
.nav__list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav__link {
  display: inline-block;
  padding: var(--space-2) var(--space-4);
  font-family: var(--ff-serif);
  font-size: 1.05rem;
  color: var(--c-ink);
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: var(--radius);
}
.nav__link:hover {
  background: var(--c-surface-2);
  border-color: var(--c-rule);
}
.nav__link[aria-current="page"] {
  background: var(--c-ink);
  color: var(--c-surface);
  border-color: var(--c-ink);
}

/* ---- 8. Hero / page banner --------------------------------------------- */
.hero {
  background: var(--c-surface);
  border: 1px solid var(--c-rule);
  border-radius: var(--radius);
  padding: var(--space-8);
  margin-bottom: var(--space-8);
  position: relative;
  overflow: hidden;
}
/* Retro ASCII-ish divider via border styles, no images. */
.hero::before {
  content: "";
  position: absolute;
  inset: 8px;
  border: 1px dashed var(--c-rule);
  pointer-events: none;
  border-radius: var(--radius);
}
.hero__eyebrow {
  font-family: var(--ff-mono);
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-size: 0.8rem;
  color: var(--c-accent-d);
  margin-bottom: var(--space-2);
}
.hero__lede {
  font-size: 1.15rem;
  color: var(--c-ink-soft);
  max-width: 48ch;
}

/* ---- 9. Content sections ----------------------------------------------- */
.section {
  background: var(--c-surface);
  border: 1px solid var(--c-rule);
  border-radius: var(--radius);
  padding: var(--space-8);
  margin-bottom: var(--space-6);
}
.section__title {
  display: flex;
  align-items: baseline;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
  border-bottom: 1px solid var(--c-rule);
  padding-bottom: var(--space-2);
}
.section__title::before {
  content: "::";
  color: var(--c-accent);
  font-family: var(--ff-mono);
}

/* Two-column content where the viewport allows. */
.grid-2 {
  display: grid;
  gap: var(--space-6);
  grid-template-columns: 1fr;
}
@media (min-width: 48rem) {
  .grid-2 { grid-template-columns: 1fr 1fr; }
}

/* Card list for features / event highlights */
.cards {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: 1fr;
  list-style: none;
  padding: 0;
  margin: 0;
}
@media (min-width: 40rem) { .cards { grid-template-columns: 1fr 1fr; } }
@media (min-width: 64rem) { .cards { grid-template-columns: repeat(3, 1fr); } }

.card {
  background: var(--c-surface-2);
  border: 1px solid var(--c-rule);
  border-radius: var(--radius);
  padding: var(--space-4);
}
.card h3 { margin-top: 0; }

/* "Callout" / notice box */
.callout {
  border-left: 4px solid var(--c-accent);
  background: var(--c-surface-2);
  padding: var(--space-4) var(--space-6);
  border-radius: 0 var(--radius) var(--radius) 0;
  margin-block: var(--space-4);
}
.callout--info { border-left-color: var(--c-primary); }

/* ---- 10. Data tables (repeaters, net schedule) ------------------------- */
.table-wrap { overflow-x: auto; }

table.data {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--ff-mono);
  font-size: 0.95rem;
  background: var(--c-surface);
}
table.data caption {
  caption-side: top;
  text-align: left;
  font-family: var(--ff-serif);
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: var(--space-2);
}
table.data th,
table.data td {
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--c-rule);
  text-align: left;
  vertical-align: top;
}
table.data thead th {
  background: var(--c-ink);
  color: var(--c-surface);
  font-family: var(--ff-serif);
  letter-spacing: 0.05em;
}
table.data tbody tr:nth-child(even) td { background: var(--c-surface-2); }

/* ---- 11. Definition-style "spec" list ---------------------------------- */
.spec {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: var(--space-2) var(--space-4);
  margin: 0;
  font-family: var(--ff-mono);
  font-size: 0.95rem;
}
.spec dt { color: var(--c-muted); text-transform: uppercase; letter-spacing: 0.1em; font-size: 0.8rem; align-self: center; }
.spec dd { margin: 0; }

/* ---- 12. Buttons -------------------------------------------------------- */
.btn {
  display: inline-block;
  font-family: var(--ff-serif);
  font-weight: 700;
  font-size: 1rem;
  padding: var(--space-3) var(--space-6);
  background: var(--c-primary);
  color: var(--c-surface);
  border: 2px solid var(--c-primary-d);
  border-radius: var(--radius);
  text-decoration: none;
  box-shadow: 3px 3px 0 var(--c-ink);
  transition: transform 120ms ease, box-shadow 120ms ease, background 120ms ease;
}
.btn:hover {
  background: var(--c-primary-d);
  color: var(--c-surface);
  transform: translate(-1px, -1px);
  box-shadow: 4px 4px 0 var(--c-ink);
}
.btn:active {
  transform: translate(2px, 2px);
  box-shadow: 1px 1px 0 var(--c-ink);
}
.btn--ghost {
  background: transparent;
  color: var(--c-primary);
  border-color: var(--c-primary);
  box-shadow: none;
}
.btn--ghost:hover {
  background: var(--c-primary);
  color: var(--c-surface);
}

/* ---- 13. Forms ---------------------------------------------------------- */
.form {
  display: grid;
  gap: var(--space-4);
  max-width: 40rem;
}
.form label {
  display: block;
  font-weight: 600;
  margin-bottom: var(--space-1);
}
.form input,
.form select,
.form textarea {
  width: 100%;
  font: inherit;
  padding: var(--space-2) var(--space-3);
  background: var(--c-bg);
  border: 1px solid var(--c-ink-soft);
  border-radius: var(--radius);
  color: var(--c-ink);
}
.form input:focus-visible,
.form select:focus-visible,
.form textarea:focus-visible {
  outline: 3px solid var(--c-mustard);
  outline-offset: 1px;
  border-color: var(--c-ink);
}
.form small { color: var(--c-muted); }

/* ---- 14. Footer --------------------------------------------------------- */
.footer {
  border-top: 4px double var(--c-primary);
  background: var(--c-surface);
  padding-block: var(--space-6);
  margin-top: var(--space-12);
  color: var(--c-muted);
  font-size: 0.9rem;
}
.footer__grid {
  display: grid;
  gap: var(--space-6);
  grid-template-columns: 1fr;
}
@media (min-width: 48rem) {
  .footer__grid { grid-template-columns: 2fr 1fr 1fr; }
}
.footer h4 {
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--c-ink);
  margin-bottom: var(--space-2);
}
.footer ul { list-style: none; padding: 0; margin: 0; }
.footer li { margin-bottom: var(--space-1); }
.footer__sign {
  font-family: var(--ff-mono);
  color: var(--c-accent-d);
  margin-top: var(--space-4);
}

/* ---- 15. Utility -------------------------------------------------------- */
.stack > * + * { margin-top: var(--space-4); }
.text-center { text-align: center; }
.lede { font-size: 1.1rem; color: var(--c-ink-soft); }