/* ==========================================================================
   MyFirst.News — site stylesheet
   Design tokens live at the top; tune the whole visual system here.
   ========================================================================== */

@layer reset, base, components, utilities;

/* --------------------------------------------------------------------------
   Design tokens
   -------------------------------------------------------------------------- */
:root {
  /* Color — all text/background pairs meet WCAG AA (verified) */
  --color-bg:             #fbf7f0;  /* warm off-white */
  --color-surface:        #fffdf8;  /* cards / callouts */
  --color-ink:            #23201b;  /* near-black body text */
  --color-muted:          #5b5348;  /* secondary text */
  --color-accent:         #c8452c;  /* coral — “voice one” */
  --color-accent-deep:    #b23a23;  /* coral for small text on bg */
  --color-secondary:      #3b5b7e;  /* slate blue — “voice two” */
  --color-secondary-deep: #2f4d6d;  /* link blue on bg */
  --color-border:         #e7ddcd;  /* hairlines */
  --color-focus:          #b23a23;

  /* Typography — system stack: fast, native, no webfont dependency */
  --font-body: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-size-base: 1rem;           /* 18px; the root size is set below */
  --leading: 1.6;
  --measure: 68ch;                  /* max line length for prose */

  /* Spacing */
  --space-xs: 0.35rem;
  --space-s:  0.65rem;
  --space-m:  1rem;
  --space-l:  1.75rem;
  --space-xl: 3rem;

  /* Shape */
  --radius: 0.9rem;
  --radius-chip: 999px;

  /* Two-voice waveform */
  --wave-a-stroke: var(--color-accent);
  --wave-b-stroke: var(--color-secondary);
}

/* --------------------------------------------------------------------------
   Reset
   -------------------------------------------------------------------------- */
@layer reset {
  *, *::before, *::after { box-sizing: border-box; }
  * { margin: 0; }
  img, svg, audio { display: block; max-width: 100%; }
}

/* --------------------------------------------------------------------------
   Base
   -------------------------------------------------------------------------- */
@layer base {
  html { font-size: 112.5%; /* 18px base */ }

  body {
    font-family: var(--font-body);
    font-size: var(--font-size-base);
    line-height: var(--leading);
    color: var(--color-ink);
    background: var(--color-bg);
    text-rendering: optimizeLegibility;
  }

  .wrap {
    max-width: 72ch;
    margin-inline: auto;
    padding-inline: var(--space-m);
  }

  main.wrap {
    padding-block: var(--space-l);
    /* Safari counts the animated paths beyond their SVG viewBox as page overflow. */
    overflow-x: clip;
  }

  h1, h2, h3 { line-height: 1.25; text-wrap: balance; }
  h1 { font-size: 1.9rem; }
  h2 { font-size: 1.4rem; }
  h3 { font-size: 1.15rem; }

  p, ul, ol { max-width: var(--measure); }
  main > * + *, section > * + * { margin-block-start: var(--space-m); }
  section + section { margin-block-start: var(--space-xl); }

  a { color: var(--color-secondary-deep); text-decoration-thickness: 1px; text-underline-offset: 0.15em; }
  a:hover { color: var(--color-accent-deep); }

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

  time, .meta { color: var(--color-muted); }
}

/* --------------------------------------------------------------------------
   Components
   -------------------------------------------------------------------------- */
@layer components {

  /* Skip link */
  .skip-link {
    position: absolute;
    inset-inline-start: var(--space-s);
    inset-block-start: var(--space-s);
    padding: var(--space-xs) var(--space-s);
    background: var(--color-ink);
    color: var(--color-bg);
    border-radius: var(--radius-chip);
    transform: translateY(-300%);
    z-index: 10;
  }
  .skip-link:focus { transform: none; }

  /* Header */
  .site-header {
    border-block-end: 1px solid var(--color-border);
    padding-block: var(--space-s);
  }
  .header-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-xs) var(--space-m);
  }
  .wordmark {
    font-weight: 800;
    font-size: 1.25rem;
    letter-spacing: -0.01em;
    color: var(--color-ink);
    text-decoration: none;
    line-height: 1.1;
  }
  .wordmark-waves {
    width: 9.5ch;
    height: 0.45em;
    margin-block-start: 0.1em;
  }
  .wordmark-waves path { fill: none; stroke-linecap: round; }
  .wordmark-waves .wave-a { stroke: var(--color-accent); stroke-width: 2.2; }
  .wordmark-waves .wave-b { stroke: var(--color-secondary); stroke-width: 1.8; }

  .site-nav { display: flex; flex-wrap: wrap; gap: var(--space-m); }
  .site-nav a {
    color: var(--color-ink);
    text-decoration: none;
    font-weight: 600;
    padding-block: 0.45em;
    border-block-end: 2px solid transparent;
  }
  .site-nav a:hover { border-block-end-color: var(--color-accent); }
  .site-nav a[aria-current="page"] { border-block-end-color: var(--color-accent); }

  /* Two-voice waveform ribbon — the recurring pop feature */
  .wave-ribbon {
    width: 100%;
    height: clamp(56px, 9vw, 96px);
    overflow: hidden;
    margin-block: var(--space-xl);
  }
  .wave-ribbon path {
    fill: none;
    stroke-linecap: round;
    stroke-linejoin: round;
  }
  .wave-ribbon .wave-a {
    stroke: var(--wave-a-stroke);
    stroke-width: 5;
    animation: wave-drift 16s linear infinite;
  }
  .wave-ribbon .wave-b {
    stroke: var(--wave-b-stroke);
    stroke-width: 4;
    opacity: 0.9;
    animation: wave-drift 11s linear infinite;
  }
  /* One full wavelength = 300 user units, so the loop is seamless */
  @keyframes wave-drift { to { transform: translateX(-300px); } }

  /* Episode number chip */
  .chip {
    display: inline-block;
    padding: 0.1em 0.7em;
    background: var(--color-accent);
    color: #fff;
    font-weight: 700;
    font-size: 0.85rem;
    border-radius: var(--radius-chip);
    letter-spacing: 0.02em;
  }
  .chip--alt { background: var(--color-secondary); }

  /* Episode card (home recent list + archive) */
  .episode-list { list-style: none; padding: 0; display: grid; grid-template-columns: minmax(0, 1fr); gap: var(--space-m); max-width: var(--measure); }
  .episode-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: var(--space-m) var(--space-l);
    transition: border-color 150ms ease, transform 150ms ease;
  }
  .episode-card:hover { border-color: var(--color-accent); transform: translateY(-2px); }
  .card-meta { font-size: 0.9rem; color: var(--color-muted); margin-block-end: var(--space-xs); display: flex; align-items: center; gap: 0.6ch; flex-wrap: wrap; }
  /* Keep date + duration together when space allows. Narrow layouts may
     wrap inside the group so enlarged text can still reflow. */
  .card-meta .meta-when { white-space: nowrap; }
  .episode-card h2, .episode-card h3 { margin-block-end: var(--space-xs); font-size: 1.15rem; }
  .episode-card h2 a, .episode-card h3 a { color: var(--color-ink); text-decoration: none; }
  .episode-card:hover h2 a, .episode-card:hover h3 a { color: var(--color-accent-deep); text-decoration: underline; }

  /* Hero (home, latest episode) */
  .hero {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: var(--space-l);
  }
  .hero > * + * { margin-block-start: var(--space-m); }
  .kicker {
    text-transform: uppercase;
    letter-spacing: 0.12em;
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--color-accent-deep);
  }
  .hero h1 { font-size: 1.7rem; }
  /* Latest-episode title links to its page, like episode-card titles */
  .hero h1 a { color: var(--color-ink); text-decoration: none; }
  .hero h1 a:hover { color: var(--color-accent-deep); text-decoration: underline; text-decoration-thickness: 2px; }

  /* Audio player */
  .player audio { width: 100%; }

  /* Story list */
  .story-list { list-style: none; padding: 0; }
  .story-list li {
    display: flex;
    gap: 1ch;
    padding-block: var(--space-xs);
    border-block-end: 1px solid var(--color-border);
  }
  .story-list li:last-child { border-block-end: 0; }
  .story-list .time {
    flex: 0 0 3.5ch;
    font-variant-numeric: tabular-nums;
    color: var(--color-secondary-deep);
    font-weight: 600;
  }

  /* “Talk about it” callout */
  .talk-about-it {
    background: color-mix(in srgb, var(--color-accent) 6%, var(--color-bg));
    border-inline-start: 5px solid var(--color-accent);
    border-radius: var(--radius);
    margin-block-start: var(--space-m);
    padding: var(--space-m) var(--space-l);
    max-width: var(--measure);
  }
  .talk-about-it h2, .talk-about-it h3 { color: var(--color-accent-deep); font-size: 1.15rem; }
  .talk-about-it p { margin-block-start: var(--space-xs); }

  /* Keep source links comfortable to tap without turning them into buttons. */
  .show-notes > ul a {
    display: inline-block;
    padding-block: 0.45em;
  }

  /* Prev / next episode nav */
  .prev-next {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: var(--space-s);
    max-width: var(--measure);
    margin-block-start: var(--space-xl);
  }
  .prev-next a { font-weight: 600; }

  /* Buttons (subscribe directories) */
  .button-list { list-style: none; padding: 0; display: grid; gap: var(--space-s); width: 100%; max-width: 34ch; }
  .button {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 1ch;
    padding: 0.6em 1em;
    border: 2px solid var(--color-ink);
    border-radius: var(--radius-chip);
    color: var(--color-ink);
    text-decoration: none;
    font-weight: 700;
    background: var(--color-surface);
    transition: background 120ms ease, border-color 120ms ease;
  }
  .button:hover { border-color: var(--color-accent); color: var(--color-accent-deep); }

  /* Feed URL block */
  .feed-url {
    display: block;
    max-width: var(--measure);
    padding: var(--space-s) var(--space-m);
    background: var(--color-ink);
    color: var(--color-bg);
    border-radius: var(--radius);
    font-size: 0.95rem;
    overflow-x: auto;
    overflow-wrap: anywhere;
    user-select: all;
  }

  /* Footer */
  .site-footer {
    border-block-start: 1px solid var(--color-border);
    padding-block: var(--space-l);
    color: var(--color-muted);
    font-size: 0.9rem;
  }
  .site-footer nav { margin-block-end: var(--space-xs); }
  .site-footer a { color: var(--color-muted); }
  .site-footer a:hover { color: var(--color-accent-deep); }
}

/* --------------------------------------------------------------------------
   Utilities
   -------------------------------------------------------------------------- */
@layer utilities {
  .visually-hidden {
    position: absolute;
    width: 1px; height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    clip-path: inset(50%);
    white-space: nowrap;
  }
}

@media (max-width: 34rem) {
  .card-meta .meta-when { white-space: normal; }
}

/* --------------------------------------------------------------------------
   Motion preferences
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  .wave-ribbon .wave-a,
  .wave-ribbon .wave-b { animation: none; }
  * { transition: none !important; }
}