/* "Road to AI Engineer Sydney" — hero/how-it-works/city-filter/timeline/
   destination. Content-driven (content.roadToSydney) so this is dead weight
   (loaded, but its selectors never match anything) on every other edition.
   Visual language adapted from a design reference the marketing team supplied
   (a static demo, not a live page) — reusing the site's own colour/type
   tokens (--link, --color-*, --font-heading/--font-body) rather than the
   demo's own hardcoded palette, with a few new page-scoped tokens (per-city
   colours; a paper-toned page background) that the shared system has no
   equivalent for. */
@layer components {

  .road-page {
    /* One consistent reading measure for the whole page — hero, how-it-works,
       timeline and destination all share it. */
    --road-measure: 960px;
    /* Per-city colours — the shared system has no per-city concept to reuse;
       Sydney intentionally reuses the site's own --link so the flagship city
       matches the site's existing accent instead of introducing a 4th hue. */
    --road-syd: var(--link, #4f46e5);
    --road-mel: #0d7d72;
    --road-bne: #b1590a;

    background: var(--color-bg, #fff);
    padding-block: clamp(2rem, 4vw, 3.5rem);
  }

  .road-measure {
    max-width: var(--road-measure);
    margin-inline: auto;
    padding-inline: 24px;
  }

  /* ------------------------------------------------------------
     Hero
  ------------------------------------------------------------ */
  #road-hero .road-eyebrow {
    font-size: var(--font-size-x-small);
    font-weight: var(--weight-bold, 800);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--link, #4f46e5);
    margin-block-end: 0.9rem;
  }
  #road-hero .road-dek { max-width: 52ch; color: var(--color-ink-weak, #444); }
  #road-hero .road-cta-row {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
    margin-block-end: 0.6rem;
  }
  #road-hero .road-fine,
  .road-fine {
    font-size: var(--font-size-x-small);
    color: var(--color-ink-muted, #666);
  }

  /* ------------------------------------------------------------
     How it works
  ------------------------------------------------------------ */
  #road-how {
    padding-block-start: 0.5rem;
    border-top: var(--hairline, 1px solid #eee);
  }
  #road-how .road-lead { max-width: 58ch; }
  .road-how-steps {
    list-style: none;
    margin: 1.4rem 0 0;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: clamp(1.25rem, 3vw, 2rem);
  }
  .road-how-steps .road-step-num {
    font-weight: var(--weight-bold, 800);
    font-size: var(--font-size-x-small);
    color: var(--link, #4f46e5);
    margin-block-end: 0.4rem;
  }
  .road-how-steps h3 { font-size: var(--font-size-regular); margin-block-end: 0.3rem; }
  .road-how-steps p { font-size: var(--font-size-small); color: var(--color-ink-muted, #666); margin: 0; }

  /* ------------------------------------------------------------
     City filter — sticky, pills with a per-city colour dot
  ------------------------------------------------------------ */
  .road-filter-shell {
    position: sticky;
    top: 0;
    z-index: 5;
    background: var(--color-bg, #fff);
    padding-block: 0.9rem;
    border-block-end: var(--hairline, 1px solid #eee);
  }
  .road-city-filter { display: flex; flex-wrap: wrap; gap: 0.5rem; }
  .road-filter-btn {
    --btn-bg: var(--color-bg, #fff);
    --btn-ink: var(--color-ink, #111);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.45rem 1rem;
    border-radius: var(--radius-pill, 999px);
    border: var(--hairline, 1px solid #ddd);
    font-size: var(--font-size-small);
    font-weight: var(--weight-medium, 600);
    cursor: pointer;
  }
  .road-filter-dot { width: 8px; height: 8px; border-radius: 50%; background: currentColor; }
  .road-filter-btn.is-active {
    --btn-bg: var(--link, #4f46e5);
    --btn-ink: var(--color-on-accent, #fff);
    border-color: var(--link, #4f46e5);
  }

  /* ------------------------------------------------------------
     Timeline
  ------------------------------------------------------------ */
  .road-timeline-wrap { position: relative; padding-block-start: 2.5rem; }
  .road-timeline-wrap::before {
    content: '';
    position: absolute;
    left: 7px;
    top: 0;
    bottom: 0;
    width: 2px;
    background-image: linear-gradient(var(--color-rule, #ddd) 60%, transparent 0%);
    background-size: 2px 14px;
    background-repeat: repeat-y;
  }
  .road-stops { list-style: none; margin: 0; padding: 0; }

  /* "You are here" — positioned by JS as a percentage down the track between
     the series start and the conference; absent entirely before the series
     starts (Aug 4) rather than floating above Stop 01. */
  .road-yah {
    position: absolute;
    left: -3px;
    display: none;
    align-items: center;
    gap: 0.6rem;
    transform: translateY(-50%);
    z-index: 2;
  }
  .road-yah.is-visible { display: flex; }
  .road-yah-ring {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--color-bg, #fff);
    border: 2.5px solid var(--link, #4f46e5);
    box-shadow: 0 0 0 4px color-mix(in oklab, var(--link, #4f46e5) 12%, transparent);
  }
  .road-yah-label {
    font-size: var(--font-size-x-small);
    font-weight: var(--weight-bold, 800);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--link, #4f46e5);
    background: var(--color-bg, #fff);
    white-space: nowrap;
  }

  .road-stop { position: relative; margin-block-end: 2.1rem; }
  .road-stops > .road-stop:last-child { margin-block-end: 0; }
  /* Square waypoint + "Stop 0X" label share a flex row — align-items:center is
     what keeps the square vertically centred ON the label's text, rather than
     the two sitting on separate lines with no shared baseline (each was its
     own independently-positioned element before, hence the misalignment). */
  .road-stop-marker {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    margin-block-end: 0.4rem;
  }
  .road-stop-wp {
    flex: 0 0 auto;
    width: 16px;
    height: 16px;
    border-radius: 4px;
    background: var(--color-bg, #fff);
    border: 2px solid var(--stop-city, var(--color-rule));
  }
  .road-stop-num {
    font-size: var(--font-size-x-small);
    font-weight: var(--weight-bold, 800);
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--color-ink-muted, #666);
  }
  .road-card-wrap { padding-inline-start: 34px; }

  .road-card {
    background: var(--color-bg, #fff);
    border: var(--hairline, 1px solid #ddd);
    border-radius: var(--radius-3, 12px);
    padding: 1.25rem 1.4rem;
    box-shadow: 0 1px 2px rgba(20, 21, 31, 0.04), 0 8px 24px rgba(20, 21, 31, 0.06);
  }
  .road-card-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 0.9rem;
    margin-block-end: 0.5rem;
  }
  .road-card-date {
    font-size: var(--font-size-small);
    font-weight: var(--weight-medium, 600);
    font-variant-numeric: tabular-nums;
  }
  .road-city-tag {
    font-size: 10.5px;
    font-weight: var(--weight-bold, 800);
    letter-spacing: 0.05em;
    text-transform: uppercase;
    padding: 0.2rem 0.6rem;
    border-radius: var(--radius-pill, 999px);
    color: #fff;
    white-space: nowrap;
    background: var(--stop-city, var(--color-ink-muted));
  }
  .road-card h3 { font-size: var(--font-size-large); margin-block-end: 0.3rem; }
  .road-card .road-venue { font-size: var(--font-size-small); color: var(--color-ink-muted, #666); margin-block-end: 0.6rem; }
  .road-card .road-hook { font-size: var(--font-size-small); max-width: 52ch; margin-block-end: 1rem; }
  .road-card-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 0.6rem; }

  /* ------------------------------------------------------------
     Button variants — .button (bold fill) already exists site-wide; these
     two are scoped to this page for the secondary/tertiary actions.
  ------------------------------------------------------------ */
  .road-btn-outline {
    --btn-bg: transparent;
    --btn-ink: var(--color-ink, #111);
    border: 1.5px solid var(--color-rule, #ddd);
    padding: 0.55rem 0.9rem;
    border-radius: 7px;
    font-size: var(--font-size-small);
    font-weight: var(--weight-medium, 600);
    cursor: pointer;
  }
  .road-btn-outline:hover { border-color: var(--link, #4f46e5); }
  .road-btn-outline[disabled] { opacity: 0.5; cursor: default; }
  .road-btn-tinted {
    --btn-bg: color-mix(in oklab, var(--link, #4f46e5) 12%, var(--color-bg, #fff));
    --btn-ink: color-mix(in oklab, var(--link, #4f46e5) 80%, black 10%);
    border: none;
    padding: 0.55rem 0.9rem;
    border-radius: 7px;
    font-size: var(--font-size-small);
    font-weight: var(--weight-medium, 600);
    cursor: pointer;
  }
  .road-btn-tinted[disabled] { opacity: 0.7; cursor: default; }

  /* Add-to-calendar — native Popover API (button popovertarget + [popover]):
     light-dismiss (click outside / Esc closes it, opening one auto-closes any
     other) is built in. Positioning it under its own button still needs a
     little JS though — a popover promotes to the top layer, which takes it
     out of its DOM parent's layout box, so plain CSS positioning can't anchor
     it there (position: fixed + JS-computed coordinates, set in the script). */
  .road-cal-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
  }
  .road-cal-chevron {
    /* An SVG box has exact, font-independent dimensions, so it flex-centres
       against the label reliably — text-character chevrons (⌄) sit at
       wildly different heights within their own em-box depending on the
       font, which is what made this keep reading as "misaligned". */
    width: 0.65em;
    height: 0.65em;
    flex: none;
    transition: transform 0.15s ease;
  }
  .road-cal-toggle.is-open .road-cal-chevron { transform: rotate(180deg); }
  .road-cal-menu {
    position: fixed;
    margin: 0;
    min-width: 196px;
    background: var(--color-bg, #fff);
    border: var(--hairline, 1px solid #ddd);
    border-radius: var(--radius-3, 10px);
    padding: 0.4rem;
    box-shadow: 0 1px 2px rgba(20, 21, 31, 0.04), 0 8px 24px rgba(20, 21, 31, 0.06);
  }
  .road-cal-menu a {
    display: block;
    padding: 0.55rem 0.7rem;
    border-radius: 7px;
    font-size: var(--font-size-small);
    font-weight: var(--weight-medium, 600);
    text-decoration: none;
    color: var(--color-ink, #111);
  }
  .road-cal-menu a:hover { background: color-mix(in oklab, var(--link, #4f46e5) 10%, var(--color-bg, #fff)); color: var(--link, #4f46e5); }

  /* ------------------------------------------------------------
     Destination — visually distinct: gradient fill, stat row.
  ------------------------------------------------------------ */
  .road-destination {
    margin-block-start: 3rem;
    background: linear-gradient(155deg, var(--link, #4f46e5), color-mix(in oklab, var(--link, #4f46e5) 75%, black 20%));
    border-radius: var(--radius-3, 16px);
    padding: clamp(1.75rem, 4vw, 2.4rem);
    color: var(--color-on-accent, #fff);
  }
  .road-destination .road-eyebrow { color: rgba(255, 255, 255, 0.85); }
  .road-destination h2 { color: inherit; font-size: var(--font-size-x-large); margin-block-end: 0.6rem; }
  .road-destination .road-dest-blurb { max-width: 54ch; opacity: 0.92; margin-block-end: 1.25rem; }
  .road-dest-meta {
    display: flex;
    gap: 1.6rem;
    flex-wrap: wrap;
    font-size: var(--font-size-small);
    margin-block-end: 1.5rem;
  }
  .road-dest-meta b { display: block; font-size: var(--font-size-regular); font-weight: var(--weight-bold, 800); margin-block-end: 0.1rem; }
  .road-dest-actions { display: flex; align-items: center; gap: 1rem; flex-wrap: wrap; }
  .road-destination .button {
    --btn-bg: var(--color-on-accent, #fff);
    --btn-ink: var(--link, #4f46e5);
  }
  .road-destination .road-cal-toggle {
    --btn-bg: transparent;
    --btn-ink: var(--color-on-accent, #fff);
    border-color: rgba(255, 255, 255, 0.55);
  }
  .road-destination .road-cal-toggle:hover { border-color: #fff; }

  /* ------------------------------------------------------------
     Shared RSVP dialog
  ------------------------------------------------------------ */
  .road-rsvp-dialog {
    margin: auto; /* reset.css's `* { margin: 0 }` clobbers dialog:modal's UA centring otherwise */
    max-width: 640px;
    width: calc(100% - 48px);
    border: none;
    border-radius: var(--radius-3, 14px);
    padding: 2.25rem 2.5rem;
  }
  .road-rsvp-dialog::backdrop { background: rgba(9, 9, 15, 0.55); }
  .road-rsvp-eyebrow {
    font-size: var(--font-size-x-small);
    font-weight: var(--weight-bold, 800);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--link, #4f46e5);
    margin-block-end: 0.5rem;
  }
  #road-rsvp-title { padding-inline-end: 2rem; margin-block-end: 0.2rem; }
  #road-rsvp-meta { font-size: var(--font-size-small); color: var(--color-ink-muted, #666); margin-block-end: 1.4rem; }
  .road-rsvp-close {
    --btn-bg: transparent;
    --btn-ink: var(--color-ink-muted, #666);
    position: absolute;
    top: 0.9rem;
    right: 0.9rem;
    width: 2rem;
    height: 2rem;
    padding: 0; /* a <button>'s default UA padding is asymmetric — left on top
      of an explicit width/height it turns a "circle" into a visible ellipse */
    border: none;
    border-radius: var(--radius-pill, 999px);
    font-size: 1.4rem;
    line-height: 1;
    cursor: pointer;
  }
  .road-rsvp-close:hover {
    --btn-bg-hover: color-mix(in oklab, var(--link, #4f46e5) 12%, transparent);
    color: var(--link, #4f46e5);
  }
  /* The [hidden] override is needed because #road-rsvp-form's own ID selector
     (specificity 1,0,0) otherwise beats the UA stylesheet's default
     `[hidden] { display: none }` (0,1,0) — without it, setting form.hidden in
     JS has no visible effect and the form stays on screen under the
     confirmation state. */
  #road-rsvp-form { display: flex; flex-direction: column; gap: 0.9rem; }
  #road-rsvp-form[hidden] { display: none; }
  .road-field-row { display: flex; gap: 0.75rem; }
  .road-field { display: flex; flex-direction: column; gap: 0.35rem; flex: 1; min-width: 0; }
  .road-field label { font-size: var(--font-size-x-small); font-weight: var(--weight-medium, 600); color: var(--color-ink-muted, #666); }
  .road-field input {
    font-size: var(--font-size-small);
    padding: 0.6rem 0.7rem;
    border-radius: 8px;
    border: 1.5px solid var(--color-rule, #ddd);
    background: var(--color-bg, #fff);
    color: var(--color-ink, #111);
  }
  .road-field input:focus {
    outline: none;
    border-color: var(--link, #4f46e5);
    box-shadow: 0 0 0 3px color-mix(in oklab, var(--link, #4f46e5) 12%, transparent);
  }
  #road-rsvp-form .submit-btn { margin-block-start: 0.3rem; width: 100%; }

  .road-rsvp-confirm { text-align: center; padding-block: 0.4rem 0.1rem; }
  .road-rsvp-confirm-check {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: color-mix(in oklab, var(--link, #4f46e5) 12%, var(--color-bg, #fff));
    color: var(--link, #4f46e5);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    margin: 0 auto 1rem;
  }
  .road-rsvp-confirm p { font-size: var(--font-size-small); margin-block-end: 1.4rem; }
  .road-rsvp-confirm .road-btn-outline { width: 100%; }

  @media (max-width: 720px) {
    .road-how-steps { grid-template-columns: 1fr; }
    .road-field-row { flex-direction: column; }
  }

  /* Home-page "Road to AI Engineer" teaser (sections/road-to-sydney.js) — same
     type scale as its Workshops/Hack Day siblings, just a soft indigo tint so
     it reads as a distinct programme rather than another plain .part block. */
  #road-to-sydney {
    background: color-mix(in oklab, var(--link, #4f46e5) 6%, var(--color-bg, #fff));
  }
}