/*
  Canterbury–Westland Science & Technology Fair
  Global CSS — mobile-first, responsive, accessible

  Header & Nav updates:
  - Two-row header layout
  - First row: logo/title (left) + CTAs (right)
  - Second row: nav bar takes full width
  - Mobile nav preserved
*/

:root {
  --color-primary: #0063a5;
  --color-secondary: #00a3a3;
  --color-accent: #ffb703;
  --color-bg: #ffffff;
  --color-bg-soft: #f5f7fa;
  --color-text: #1a1f2b;
  --color-muted: #6b7280;

  --radius: 12px;
  --shadow: 0 4px 16px rgba(0,0,0,.08);
  --container: 1100px;
}

[data-theme="dark"]{
  --color-bg: #0b1220;
  --color-bg-soft: #0f1628;
  --color-text: #e5e7eb;
  --color-muted: #9ca3af;
  --shadow: 0 6px 24px rgba(0,0,0,.4);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family: Inter, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
  color:var(--color-text);
  background:var(--color-bg);
  line-height:1.6;
}

img{max-width:100%; height:auto; display:block}
.container{max-width:var(--container); margin-inline:auto; padding: clamp(12px, 2vw, 20px)}

h1,h2,h3{font-family:Poppins, Inter, system-ui, -apple-system, "Segoe UI", Roboto; line-height:1.2}
h1{font-size:clamp(2rem, 2.6vw + 1rem, 3rem); margin:.2em 0 .3em}
h2{font-size:clamp(1.5rem, 1.4vw + 1rem, 2rem); margin:1.2em 0 .4em}
h3{font-size:clamp(1.1rem, 1vw + .8rem, 1.4rem); margin:1em 0 .3em}

p{margin:.6em 0}
.muted{color:var(--color-muted)}
.accent{color:var(--color-accent)}

/* Links & buttons */
a{color:var(--color-primary); text-decoration-color: color-mix(in oklab, var(--color-primary), transparent 60%)}
a:focus-visible, button:focus-visible, .btn:focus-visible{outline:3px solid var(--color-accent); outline-offset:2px}
.btn{display:inline-block; padding:.6em .9em; border-radius:10px; border:1px solid color-mix(in oklab, var(--color-text), transparent 80%); box-shadow:var(--shadow); text-decoration:none; color:var(--color-text); background:var(--color-bg-soft)}
.btn:hover{transform:translateY(-1px)}
.btn.primary{background:var(--color-primary); color:white; border-color:transparent}
.btn.outline{background:transparent}

a {
  text-decoration: none;
}

/* Header */
.skip-link{position:absolute; left:-9999px}
.skip-link:focus{left:16px; top:16px; z-index:999; background:var(--color-accent); color:#111; padding:.5em 1em; border-radius:8px}

.site-header{
  position:sticky;
  top:0;
  background:var(--color-bg);
  border-bottom:1px solid color-mix(in oklab, var(--color-text), transparent 90%);
  z-index:10000;
  will-change:transform;
}

/* Project card images */
.card img {
  border-radius: 12px;     /* soften corners */
  margin-bottom: 12px;     /* space between image and text */
  box-shadow: var(--shadow); /* optional: give them a soft shadow */
  object-fit: cover;       /* crop instead of stretching */
  width: 100%;             /* make them fill card width */
  height: 200px;           /* fixed height for consistency */
  border: 1px solid color-mix(in oklab, var(--color-text), transparent 85%);
}

.gallery-grid img {
  justify-content: center;
  border-radius: 12px;     /* soften corners */
  margin-bottom: 12px;     /* space between image and text */
  box-shadow: var(--shadow); /* optional: give them a soft shadow */
  object-fit: cover;       /* crop instead of stretching */
  width: 80%;             /* make them fill card width */
  border: 1px solid color-mix(in oklab, var(--color-text), transparent 85%);
}
.gallery-slideshow {
  position: relative;
  max-width: 900px;
  margin: 2rem auto;
  overflow: hidden;
  border-radius: 16px;
  box-shadow: var(--shadow);
}

.gallery-slideshow .slides {
  display: flex;
  transition: transform 0.6s ease;
}

.gallery-slideshow .slide {
  min-width: 100%;
  flex-shrink: 0;
}

.gallery-slideshow img {
  width: 100%;
  height: 500px;
  object-fit: cover;
  display: block;
  cursor: pointer; /* makes it clear you can click */
}

/* Controls */
.gallery-slideshow .prev,
.gallery-slideshow .next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(0,0,0,0.5);
  color: white;
  border: none;
  padding: .6em;
  cursor: pointer;
  border-radius: 50%;
  font-size: 1.5rem;
}

.gallery-slideshow .prev { left: 10px; }
.gallery-slideshow .next { right: 10px; }

/* Dots */
.gallery-slideshow .dots {
  text-align: center;
  margin-top: .6rem;
}

.gallery-slideshow .dot {
  height: 12px;
  width: 12px;
  margin: 0 4px;
  background: var(--color-muted);
  border-radius: 50%;
  display: inline-block;
  cursor: pointer;
}

.gallery-slideshow .dot.active {
  background: var(--color-primary);
}


/* Top row: logo + CTAs */
.header-top{
  display:flex;
  justify-content:space-between;
  align-items:center;
  padding: 0.4rem clamp(12px, 2vw, 20px);
  gap:16px;
  flex-wrap:wrap;
}
.branding{
  display:flex;
  align-items:center;
  gap:10px;
}
.branding .logo{
  width:40px;
  height:auto;
}
.branding h1{
  font-size:1rem;
  margin:0;
}

.header-actions{
  display:flex;
  align-items:center;
  gap:12px;
}

/* Second row: nav spans entire screen width */
/* Full-width nav bar */
.main-nav {
  /* span the full page but don't use 100vw (it causes horizontal overflow)  left: 0;
  right: 0;
  width: 100%;        /* <- use 100% instead of 100vw */
  margin: 0;
  padding: 0;
  background: var(--color-bg);
  border-top: 1px solid color-mix(in oklab, var(--color-text), transparent 92%);
  border-bottom: 1px solid color-mix(in oklab, var(--color-text), transparent 92%);
  box-sizing: border-box; /* ensure borders/padding don't expand width */
}
/* ensure the .container inside the nav doesn't constrain layout — let nav be full width */
.main-nav .container {
  max-width: none;
  width: 100%;
  margin: 0;
  padding: 0;
}

/* target only the top-level nav list (prevents nested .submenu <ul> from becoming flex) */
.main-nav > .container > ul {
  display: flex;
  justify-content: space-evenly; /* Even spacing across full width */
  flex-wrap: nowrap;             /* Keep in one line */
  list-style: none;
  margin: 0;
  padding: 0.35rem 0;            /* reduced vertical padding */
  gap: 0;
  width: 100%;
}

/* top-level items behave as equal columns */
.main-nav > .container > ul > li {
  flex: 1;
  text-align: center;
}

.main-nav a{
  text-decoration:none;
  color:var(--color-primary);
  font-weight:500;
  padding:0.3em 0.5em;
  border-radius:8px;
}
.main-nav a:hover,
.main-nav a[aria-current="page"]{
  background:var(--color-bg-soft);
}

/* Dropdown submenu (desktop) */
.main-nav li {
  position: relative;
}

/* submenu override: block layout, vertical stack */
.submenu {
  display: none;                 /* hidden by default */
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  min-width: 220px;
  background: var(--color-bg);
  border: 1px solid color-mix(in oklab, var(--color-text), transparent 88%);
  border-radius: 12px;
  padding: 8px 0;
  box-shadow: 0 8px 24px rgba(0,0,0,.12);
  z-index: 11000;
  list-style: none;
  flex-direction: column;        /* when displayed, stack vertically */
}

.submenu li {
  width: 100%;
}

.submenu a {
  display: block;
  padding: 0.5em 1em;
  color: var(--color-text);
  text-decoration: none;
  border-radius: 0;
}

.submenu a:hover {
  background: var(--color-bg-soft);
}

/* Show submenu on hover/focus (desktop) */
.has-submenu:hover > .submenu,
.has-submenu:focus-within > .submenu {
  display: block;
}

/* Also allow explicit open via class (used for mobile click toggle) */
.has-submenu.open > .submenu {
  display: block;
}

/* Submenu arrows inline with text (arrow is purely visual) */
.has-submenu > a::after {
  content: "▾";
  margin-left: 0.3em;
  font-size: 0.8em;
  vertical-align: middle;
  opacity: 0.8;
}

/* Mobile nav adjustments */
@media (max-width: 860px) {
  .main-nav > .container > ul {
    flex-direction: column;
    align-items: flex-start;
  }

  .submenu {
    position: static;
    display: none;
    box-shadow: none;
    border: 0;
    padding-left: 16px;
    background: transparent;
  }

  .has-submenu > a::after {
    content: "▸";
  }
  .has-submenu.open > a::after {
    content: "▾";
  }
}

/* Menu button */
.menu-button{
  display:inline-flex;
  align-items:center;
  gap:.5rem;
  padding:.45em .6em;
  border-radius:8px;
  background:transparent;
  border:0;
  cursor:pointer;
}
.menu-button:after{content:'▾'; font-size:.8rem; opacity:.9}

/* Mobile nav toggle */
.nav-toggle{display:none}
.nav-toggle-bar{display:block; width:22px; height:2px; background:var(--color-text); margin:4px 0}

@media (max-width: 860px){
  .header-top{flex-wrap:wrap}
  .menu-button:after{content:'▸'}
  .nav-toggle{display:block}
}

/* Theme toggle */
/* Theme toggle */
.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: .6em .9em; /* match .btn */
  border-radius: 10px; /* match .btn radius */
  border: 1px solid color-mix(in oklab, var(--color-text), transparent 80%);
  background: var(--color-bg-soft);
  box-shadow: var(--shadow); /* same depth as .btn */
  font: inherit; /* ensure text sizing matches */
  line-height: 1.2;
  cursor: pointer;
}
.theme-toggle:hover {
  transform: translateY(-1px); /* same hover lift as .btn */
}


/* Hero */
.hero{
  background:linear-gradient(180deg, color-mix(in oklab, var(--color-primary), transparent 85%), transparent), var(--color-bg-soft);
  position:relative;
  z-index:0;
}
.hero-inner{display:grid; grid-template-columns:1.2fr 1fr; gap:24px; align-items:center}
.hero-copy h1{margin-top:0}
@media (max-width: 900px){.hero-inner{grid-template-columns:1fr}}

/* NEW — make the hero image circular while preserving layout
   - Forces equal width/height for the image, uses object-fit: cover to crop nicely.
   - Adjust the clamp values to taste (min, responsive, max).
*/
.hero .hero-inner img,
.hero > .container .hero-inner img {
  /* ensure the hero image becomes a square that scales with viewport */
  /* width: clamp(160px, 30vw, 420px);
  height: clamp(160px, 30vw, 420px); */
  border-radius: 50px; /* circle */
  object-fit: cover;     /* crop to fit the square */
  display: block;
  margin-inline-start: auto;
  margin-inline-end: auto;
  align-self: center;
}

/* Layout helpers, cards, footer, etc. — unchanged */
.grid{display:grid; gap:20px}
.grid-2{grid-template-columns:repeat(2, minmax(0,1fr))}
.grid-3{grid-template-columns:repeat(3, minmax(0,1fr))}
@media (max-width: 900px){.grid-2, .grid-3{grid-template-columns:1fr}}

.cards{display:grid; gap:16px}
.cards-3{grid-template-columns:repeat(3, minmax(0,1fr))}
.cards-2{grid-template-columns:repeat(2, minmax(0,1fr))}
@media (max-width: 900px){.cards-2, .cards-3{grid-template-columns:1fr}}

.card{background:var(--color-bg); border:1px solid color-mix(in oklab, var(--color-text), transparent 88%); border-radius:12px; padding:clamp(12px, 1.2vw + 8px, 20px); box-shadow:var(--shadow)}
.card h3{margin-top:0}
.chips{display:flex; gap:8px; flex-wrap:wrap}
.chip{display:inline-block; padding:.2em .6em; background:var(--color-bg-soft); border-radius:999px; font-size:.85em}
.meta{font-size:.9em; color:var(--color-muted)}

.input{width:100%; padding:.7em .8em; border-radius:12px; border:1px solid color-mix(in oklab, var(--color-text), transparent 80%); background:var(--color-bg)}
.form-row{margin-bottom:12px}
.filters{display:flex; gap:12px; align-items:center; flex-wrap:wrap; margin-bottom:16px}
.search{flex:1}

.breadcrumbs{color:var(--color-muted); font-size:.9em}

.site-footer{margin-top:40px; border-top:1px solid color-mix(in oklab, var(--color-text), transparent 90%); background:var(--color-bg-soft)}
.footer-grid{display:grid; gap:16px; grid-template-columns: 2fr 1fr 1fr}
.footer-heading{margin:.6em 0}
.footer-links{list-style:none; padding:0; margin:0}
.footer-links a{display:block; padding:.3em 0}
.footer-bottom{display:flex; justify-content:space-between; gap:12px; align-items:center; padding-top:0}
@media (max-width: 900px){.footer-grid{grid-template-columns:1fr}.footer-bottom{flex-direction:column; align-items:flex-start}}

.cta-band{background:linear-gradient(90deg, color-mix(in oklab, var(--color-primary), transparent 85%), color-mix(in oklab, var(--color-secondary), transparent 85%)); margin:24px 0}
.cta-inner{display:flex; align-items:center; justify-content:space-between; gap:16px}

.lightbox-backdrop{position:fixed; inset:0; background:rgba(0,0,0,.6); display:none; align-items:center; justify-content:center; padding:24px}
.lightbox-backdrop.open{display:flex}
.lightbox-backdrop .content{max-width:min(1100px, 96vw); max-height:90vh}
.lightbox-backdrop img{width:100%; height:auto; border-radius:12px}
.lightbox-close{position:absolute; top:16px; right:16px; background:white; color:#111; border:0; border-radius:10px; padding:.4em .6em}

/* Tables */
.table{width:100%; border-collapse:separate; border-spacing:0}
.table th, .table td{padding:.6em .8em; border-bottom:1px solid color-mix(in oklab, var(--color-text), transparent 88%)}
.table th{text-align:left}

@media print{
  .site-header, .site-footer, .nav-ctas, .nav-toggle{display:none !important}
  a[href]::after{content:" (" attr(href) ")"; font-size:.9em}
}