/* Theme colors and utilities */
:root {
  --accent-glow: drop-shadow(0 0 8px rgba(77, 208, 225, 0.45));
}

body {
  margin: 0;
  color: var(--text);
  background: radial-gradient(circle at 15% 15%, rgba(77, 208, 225, 0.14), transparent 52%),
              radial-gradient(circle at 85% 20%, rgba(198, 92, 255, 0.10), transparent 55%),
              linear-gradient(165deg, var(--bg) 0%, var(--bg-2) 100%);
  font-family: var(--font-ui);
  line-height: 1.6;
}

h1, h2, h3, h4 {
  letter-spacing: -0.02em;
  font-weight: 700;
}

a {
  color: var(--accent);
  transition: color 150ms ease;
}

a:hover, a:focus {
  color: var(--accent-2);
  text-decoration: none;
}

::selection {
  background: rgba(77, 208, 225, 0.22);
}

.logo {
  font-weight: 700;
  letter-spacing: 0.05em;
  font-size: 1.05rem;
  color: var(--color-fg);
}

.logo:hover,
.logo:focus {
  color: var(--color-accent);
}

.site-header {
  padding: 1.2rem 0;
  position: sticky;
  top: 0;
  background: rgba(10, 26, 47, 0.85);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(10px);
  z-index: 20;
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  width: min(100%, var(--max-width));
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.site-nav {
  display: none;
}

.site-nav--open {
  display: block;
  position: absolute;
  top: 100%;
  right: 0;
  left: 0;
  background: rgba(10, 26, 47, 0.95);
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding: 1rem var(--gutter);
}

.site-nav__list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.site-nav__list li {
  margin: 0;
}

.site-nav__list a {
  display: block;
  padding: 0.65rem 0.9rem;
  border-radius: 0.45rem;
  color: var(--color-fg);
}

.site-nav__list a:hover,
.site-nav__list a:focus {
  background: rgba(77, 208, 225, 0.12);
}

.nav-toggle {
  display: inline-flex;
  height: 2.4rem;
  width: 2.4rem;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 0.6rem;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.nav-toggle:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.nav-toggle__bar {
  width: 1.25rem;
  height: 2px;
  background: var(--color-fg);
  margin: 2px 0;
  border-radius: 999px;
}

@media (min-width: 880px) {
  .nav-toggle {
    display: none;
  }

  .site-nav {
    display: block;
    position: static;
    background: transparent;
    border: none;
    padding: 0;
  }

  .site-nav__list {
    flex-direction: row;
    gap: 1.25rem;
  }

  .site-nav__list a {
    padding: 0.35rem 0;
  }

    body[class^="bg-hero-"] {
    background-attachment: scroll; /* avoid fixed bg on mobile */
  }

  .hero {
    padding: 3.2rem 1.4rem 2.6rem;
    background-position: center top;
  }

  .hero--main {
    background-image: url("../assets/images/hero-main-sm.jpg");
  }

  .hero--ions {
    background-image: url("../assets/images/hero-ions-sm.jpg");
  }

  .hero--education {
    background-image: url("../assets/images/hero-education-sm.jpg");
  }

  .hero--about {
    background-image: url("../assets/images/hero-about-sm.jpg");
  }
}

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 4.5rem 1.6rem 3.5rem;
  border-radius: 0;               /* remove rounded edges for full‑page */
  overflow: hidden;
  color: var(--text);
  background-color: rgba(10, 16, 28, 0.72);
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  box-shadow: none;               /* no shadow for full viewport */
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(10,16,28,0.78) 0%, rgba(10,16,28,0.94) 85%);
  pointer-events: none;
}

.hero__title {
  text-shadow: 0 3px 18px rgba(0, 0, 0, 0.65);
}

.hero__subtitle {
  color: rgba(255, 255, 255, 0.92);
  text-shadow: 0 2px 14px rgba(0, 0, 0, 0.68);
}

/* page-specific hero images */
.hero--main {
  background-image: url("../assets/images/hero-main.jpg");
}

.hero--ions {
  background-image: url("../assets/images/hero-ions.jpg");
}

.hero--education {
  background-image: url("../assets/images/hero-education.jpg");
}

.hero--about {
  background-image: url("../assets/images/hero-about.jpg");
}

.highlight {
  color: var(--color-accent);
}

.text-muted {
  color: var(--color-muted);
}

/* ----------------------------- */
/* Base palette (moodboard style) */
/* ----------------------------- */
:root {
  --bg: #050611;
  --bg-2: #0b0f1a;
  --panel: rgba(18, 26, 42, 0.72);
  --panel-2: rgba(22, 34, 54, 0.84);
  --text: rgba(242, 245, 255, 0.94);
  --muted: rgba(200, 210, 226, 0.62);
  --border: rgba(94, 174, 231, 0.22);

  --accent: #4dd0e1;
  --accent-2: #c65cff;
  --accent-3: #f2c94c;

  --shadow: 0 18px 48px rgba(0, 0, 0, 0.55);
  --glow: 0 0 40px rgba(77, 208, 225, 0.30);

  --font-ui: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
}

body {
  margin: 0;
  color: var(--text);
  background: radial-gradient(circle at 15% 15%, rgba(77, 208, 225, 0.14), transparent 52%),
              radial-gradient(circle at 85% 20%, rgba(198, 92, 255, 0.10), transparent 55%),
              linear-gradient(165deg, var(--bg) 0%, var(--bg-2) 100%);
  font-family: var(--font-ui);
  line-height: 1.6;
}

h1, h2, h3, h4 {
  letter-spacing: -0.02em;
  font-weight: 700;
}

a {
  color: var(--accent);
  transition: color 150ms ease;
}

a:hover, a:focus {
  color: var(--accent-2);
  text-decoration: none;
}

::selection {
  background: rgba(77, 208, 225, 0.22);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(255,255,255,0.04) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 120px 120px;
  opacity: 0.18;
  mix-blend-mode: overlay;
}

@media (max-width: 900px) {
  .hero {
    padding: 3.2rem 1.4rem 2.6rem;
    background-position: center top;
  }

  .hero--main {
    background-image: url("../assets/images/hero-main-sm.jpg");
  }

  .hero--ions {
    background-image: url("../assets/images/hero-ions-sm.jpg");
  }

  .hero--education {
    background-image: url("../assets/images/hero-education-sm.jpg");
  }

.hero--about {
  background-image: url("../assets/images/hero-about-sm.jpg");
}
.hero--contact {
  background-image: url("../assets/images/hero-contact-sm.jpg");
}
.hero--community {
  background-image: url("../assets/images/hero-community-sm.jpg");
}
.hero--ionization {
  background-image: url("../assets/images/hero-ionization-sm.jpg");
}
.hero--accelerators {
  background-image: url("../assets/images/hero-accelerators-sm.jpg");
}
.hero--applications {
  background-image: url("../assets/images/hero-applications-sm.jpg");
}
}

/* ensure the page can be full height for background coverage */
html, body {
  height: 100%;
}

/* shared full-page background styling */
body[class^="bg-hero-"] {
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  background-attachment: fixed;
  background-color: #050611;
}

/* keep the hero block transparent so the page background shows through */
.hero {
  background: transparent;
  box-shadow: none;
}

/* per-page full-page backgrounds */
body.bg-hero-main { background-image: url("../assets/images/hero-main.jpg"); }
body.bg-hero-ions { background-image: url("../assets/images/hero-ions.jpg"); }
body.bg-hero-education { background-image: url("../assets/images/hero-education.jpg"); }

body.bg-hero-about { background-image: url("../assets/images/hero-about.jpg"); }
body.bg-hero-contact { background-image: url("../assets/images/hero-contact.jpg"); }
body.bg-hero-community { background-image: url("../assets/images/hero-community.jpg"); }
body.bg-hero-ionization { background-image: url("../assets/images/hero-ionization.jpg"); }
body.bg-hero-accelerators { background-image: url("../assets/images/hero-accelerators.jpg"); }
body.bg-hero-applications { background-image: url("../assets/images/hero-applications.jpg"); }