/* =================================================================
   Australian Collection of Duckweed Clones — shared stylesheet
   A hand-coded static site. Every page links to this one file, so
   colours, type and layout can be changed here in one place.

   Palette theme: water + duckweed. Teal water, frond greens, a pale
   water-mint background.

   Contents
     1.  Design tokens (colours, type, spacing)
     2.  Base + links
     3.  Layout wrappers
     4.  Header: brand + primary nav + section sub-nav
     5.  Page head / hero
     6.  Prose, figures, dividers
     7.  Link lists
     8.  Placeholder ("under construction") notice
     9.  Contact block
     10. Footer
     11. Reduced motion
     12. Responsive
   ================================================================= */


/* ----------------------------------------------------------------
   1. Design tokens
   ---------------------------------------------------------------- */
:root {
  --water:      #0E7C86;   /* primary teal */
  --water-deep: #0A5A62;   /* darker teal for hovers/headings */
  --frond:      #4E9A51;   /* duckweed green */
  --frond-deep: #3B7A3E;
  --frond-lite: #9BD44E;   /* bright lily-pad accent (use sparingly) */

  --surface:  #F1F7F5;     /* page background — pale water */
  --panel:    #FFFFFF;     /* cards / header */
  --band:     #E1EFEA;     /* section band */
  --line:     #CFE3DC;     /* hairlines / borders */

  --ink:      #0F2320;     /* body text */
  --ink-soft: #45564F;     /* secondary text */

  --wrap: 78rem;
  --measure: 46rem;        /* comfortable reading width */

  --radius: 10px;

  --display: "Spectral", Georgia, "Times New Roman", serif;
  --body: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}


/* ----------------------------------------------------------------
   2. Base + links
   ---------------------------------------------------------------- */
* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--surface);
  color: var(--ink);
  font-family: var(--body);
  font-size: 1.02rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
  font-family: var(--display);
  line-height: 1.18;
  color: var(--water-deep);
  font-weight: 600;
}

h2 { font-size: 1.55rem; margin: 2.4rem 0 0.6rem; }
h3 { font-size: 1.2rem; margin: 1.6rem 0 0.4rem; color: var(--frond-deep); }

p { margin: 0 0 1rem; max-width: var(--measure); }

a { color: var(--water); text-decoration: underline; text-underline-offset: 2px; }
a:hover { color: var(--frond-deep); }

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

hr { border: 0; }


/* ----------------------------------------------------------------
   3. Layout wrappers
   ---------------------------------------------------------------- */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: 1.5rem;
}
main.wrap { padding-block: 2.5rem 3.5rem; }


/* ----------------------------------------------------------------
   4. Header: brand + primary nav + section sub-nav
   ---------------------------------------------------------------- */
.site-header {
  background: var(--panel);
  border-bottom: 1px solid var(--line);
}

.brand-row { padding-block: 1.1rem; }

.brand {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  text-decoration: none;
  color: inherit;
}
.brand:hover { color: inherit; }

/* Site logo in the header */
.brand-logo {
  flex: none;
  height: 3rem;
  width: auto;
  display: block;
}

.brand-name {
  display: block;
  font-family: var(--display);
  font-weight: 600;
  font-size: 1.22rem;
  color: var(--water-deep);
  line-height: 1.15;
}
.brand-tag {
  display: block;
  font-size: 0.82rem;
  color: var(--ink-soft);
  margin-top: 0.1rem;
}

/* Primary navigation */
nav.primary {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.4rem;
  padding-block: 0.7rem;
  border-top: 1px solid var(--line);
}
nav.primary a {
  text-decoration: none;
  color: var(--ink-soft);
  font-weight: 500;
  font-size: 0.98rem;
  padding: 0.15rem 0;
  border-bottom: 2px solid transparent;
}
nav.primary a:hover { color: var(--water-deep); }
nav.primary a[aria-current="page"] {
  color: var(--water-deep);
  border-bottom-color: var(--frond-lite);
}

/* Section sub-navigation (Database / Resources / About) */
/* subnav sits in a full-width band; the nav itself stays aligned to .wrap */
.subnav-bar { background: var(--band); border-bottom: 1px solid var(--line); }
nav.subnav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem 1.1rem;
  padding-block: 0.6rem;
  font-size: 0.9rem;
}
nav.subnav a {
  text-decoration: none;
  color: var(--ink-soft);
  padding: 0.1rem 0;
  border-bottom: 2px solid transparent;
}
nav.subnav a:hover { color: var(--water-deep); }
nav.subnav a[aria-current="page"] {
  color: var(--water-deep);
  font-weight: 600;
  border-bottom-color: var(--frond);
}


/* ----------------------------------------------------------------
   5. Page head / hero
   ---------------------------------------------------------------- */
.page-head { padding-block: 2.2rem 0.5rem; }
.eyebrow {
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--frond-deep);
  margin: 0 0 0.4rem;
  font-weight: 600;
}
.page-title {
  font-size: clamp(1.7rem, 4vw, 2.5rem);
  margin: 0 0 0.5rem;
}
.standfirst {
  font-size: 1.1rem;
  color: var(--ink-soft);
  max-width: var(--measure);
}

.hero { padding-block: 2.6rem 1rem; }
.hero .lede { font-size: 1.15rem; color: var(--ink-soft); }


/* ----------------------------------------------------------------
   6. Prose, figures, dividers
   ---------------------------------------------------------------- */
figure {
  margin: 1.6rem 0;
  max-width: 44rem;
}
figure img {
  border-radius: var(--radius);
  border: 1px solid var(--line);
}
figcaption {
  font-size: 0.86rem;
  color: var(--ink-soft);
  font-style: italic;
  margin-top: 0.5rem;
}

/* Responsive video wrapper */
.video {
  position: relative;
  max-width: 44rem;
  aspect-ratio: 16 / 9;
  margin: 1.6rem 0;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--band);
}
.video iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}
.video.portrait {
  aspect-ratio: 9 / 16;   /* vertical YouTube Short */
  max-width: 20rem;        /* keep it phone-width, not a giant column */
}

/* Embedded Google Form */
.form-embed {
  width: 100%;
  max-width: 44rem;
  height: 900px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  margin: 1.4rem 0;
  background: var(--panel);
}

/* Divider: a little row of floating fronds */
.divider {
  border: 0;
  height: 1.4rem;
  margin: 2.4rem 0;
  background-image:
    radial-gradient(circle, var(--frond) 0 40%, transparent 42%),
    radial-gradient(circle, var(--frond-lite) 0 40%, transparent 42%),
    radial-gradient(circle, var(--water) 0 40%, transparent 42%);
  background-size: 0.7rem 0.7rem, 0.7rem 0.7rem, 0.7rem 0.7rem;
  background-position: left center, center center, right center;
  background-repeat: no-repeat;
  opacity: 0.8;
}


/* ----------------------------------------------------------------
   7. Link lists
   ---------------------------------------------------------------- */
.link-group {
  list-style: none;
  padding: 0;
  margin: 1rem 0;
  max-width: var(--measure);
}
.link-group li {
  padding: 0.7rem 0;
  border-bottom: 1px solid var(--line);
}
.link-group li:first-child { border-top: 1px solid var(--line); }


/* ----------------------------------------------------------------
   8. Placeholder ("under construction") notice
   ---------------------------------------------------------------- */
.placeholder {
  max-width: var(--measure);
  margin: 1.5rem 0;
  padding: 1.1rem 1.25rem;
  background: var(--band);
  border: 1px dashed var(--frond);
  border-radius: var(--radius);
  color: var(--ink-soft);
}
.placeholder strong { color: var(--frond-deep); }


/* ----------------------------------------------------------------
   9. Contact block
   ---------------------------------------------------------------- */
.contact-block {
  max-width: var(--measure);
  margin: 1.5rem 0;
  padding-left: 1rem;
  border-left: 3px solid var(--band);
}
.contact-block address {
  font-style: normal;
  line-height: 1.8;
}


/* ----------------------------------------------------------------
   10. Footer
   ---------------------------------------------------------------- */
.site-footer {
  border-top: 1px solid var(--line);
  background: var(--panel);
  color: var(--ink-soft);
  font-size: 0.9rem;
}
.site-footer .wrap { padding-block: 1.4rem; }
.site-footer a { color: var(--water); }


/* ----------------------------------------------------------------
   11. Reduced motion
   ---------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}


/* ----------------------------------------------------------------
   12. Responsive
   ---------------------------------------------------------------- */
@media (max-width: 40rem) {
  body { font-size: 1rem; }
  .brand-name { font-size: 1.08rem; }
  .brand-tag { font-size: 0.78rem; }
  nav.primary { gap: 0.3rem 1rem; }
  .form-embed { height: 1100px; }
}

/* ----------------------------------------------------------------
   13. Helper aliases (referenced in markup)
   ---------------------------------------------------------------- */
.wrap-wide { max-width: var(--wrap); }        /* header/footer align with content */
.brand-text { display: flex; flex-direction: column; }

/* ----------------------------------------------------------------
   15. News entries
   ---------------------------------------------------------------- */
.news-entry {
  max-width: var(--measure);
  padding: 1.2rem 0;
  border-bottom: 1px solid var(--line);
}
.news-entry:first-of-type { border-top: 1px solid var(--line); }
.news-date {
  font-family: var(--display);
  font-weight: 600;
  color: var(--frond-deep);
  margin: 0 0 0.3rem;
}