/* Math & Science Night — site styles */

/* ---------- Fonts (Metropolis, self-hosted) ---------- */
@font-face {
  font-family: 'Metropolis';
  font-weight: 300;
  font-style: normal;
  font-display: swap;
  src: url('../assets/fonts/metropolis-300.woff2') format('woff2');
}
@font-face {
  font-family: 'Metropolis';
  font-weight: 400;
  font-style: normal;
  font-display: swap;
  src: url('../assets/fonts/metropolis-400.woff2') format('woff2');
}
@font-face {
  font-family: 'Metropolis';
  font-weight: 500;
  font-style: normal;
  font-display: swap;
  src: url('../assets/fonts/metropolis-500.woff2') format('woff2');
}
@font-face {
  font-family: 'Metropolis';
  font-weight: 600;
  font-style: normal;
  font-display: swap;
  src: url('../assets/fonts/metropolis-600.woff2') format('woff2');
}
@font-face {
  font-family: 'Metropolis';
  font-weight: 700;
  font-style: normal;
  font-display: swap;
  src: url('../assets/fonts/metropolis-700.woff2') format('woff2');
}
@font-face {
  font-family: 'Metropolis';
  font-weight: 800;
  font-style: normal;
  font-display: swap;
  src: url('../assets/fonts/metropolis-800.woff2') format('woff2');
}

/* ---------- Base ---------- */
:root {
  --sidebar-w: 300px;
  --bg-side: #000000;
  --bg-main: #272727;
  --accent: #9fa8da;
  --text: rgba(255, 255, 255, 0.8);
  --text-dim: rgba(255, 255, 255, 0.7);
  --white: #ffffff;
  --font: 'Metropolis', 'Apple Color Emoji', 'Noto Color Emoji', sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  font-size: 17.2px;
  font-weight: 400;
  line-height: 1.5;
  letter-spacing: -0.02em;
  color: var(--text);
  background: var(--bg-main);
}

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

a { color: inherit; }

/* ---------- Sidebar ---------- */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-w);
  height: 100vh;
  background: var(--bg-side);
  display: flex;
  flex-direction: column;
  align-items: center;
  z-index: 100;
}

.brand {
  text-align: center;
  padding: 30px 20px 0;
}

.brand-logo img {
  width: 100px;
  height: 100px;
  margin: 0 auto;
}

.brand-title {
  display: block;
  margin-top: 18px;
  font-size: 21px;
  font-weight: 200;
  letter-spacing: -0.02em;
  line-height: 1.6;
  color: var(--white);
  text-decoration: none;
}

.brand-title strong { font-weight: 900; }

.brand-slogan {
  margin-top: 10px;
  font-size: 15.2px;
  font-weight: 400;
  letter-spacing: 1px;
  line-height: 1.6;
  color: var(--white);
}

.nav {
  flex: 1;
  display: flex;
  align-items: center;
  width: 100%;
}

.nav ul {
  list-style: none;
  width: 100%;
}

.nav li { padding: 7px 0; text-align: center; }

.nav a {
  display: block;
  padding: 0 50px;
  font-size: 15.2px;
  font-weight: 300;
  line-height: 23px;
  letter-spacing: normal;
  color: var(--text);
  text-decoration: none;
  transition: color 0.15s;
}

.nav a:hover { color: var(--white); }

.nav a.active {
  color: var(--accent);
  font-weight: 500;
}

.side-footer {
  padding: 20px;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.45);
  text-align: center;
}

/* Mobile menu button (hidden on desktop) */
.menu-toggle {
  display: none;
  background: none;
  border: 0;
  cursor: pointer;
  padding: 10px;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--white);
  margin: 5px 0;
  transition: transform 0.2s, opacity 0.2s;
}

/* ---------- Main column ---------- */
.main { margin-left: var(--sidebar-w); }

/* ---------- Hero ---------- */
.hero {
  height: 300px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-main) url('../assets/img/star-pattern.png') center center repeat;
}

.hero h1 {
  font-size: 72px;
  font-weight: 500;
  line-height: 1.5;
  letter-spacing: normal;
  color: var(--white);
  text-align: center;
}

/* ---------- Sections ---------- */
.section { padding: 60px 20px; }

.section.pattern {
  background: var(--bg-main) url('../assets/img/star-pattern.png') center center repeat;
}

.section-inner { max-width: 920px; margin: 0 auto; }

.section-inner.wide { max-width: 1160px; }

.section h1 {
  font-size: 37px;
  font-weight: 500;
  line-height: 1.35;
  letter-spacing: normal;
  color: var(--white);
  margin-bottom: 20px;
}

.section h1 strong { font-weight: 800; }

/* Short accent line under headings */
.section h1::after {
  content: '';
  display: block;
  width: 80px;
  height: 2px;
  background: var(--accent);
  margin-top: 16px;
}

.section h1.centered { text-align: center; }
.section h1.centered::after { margin-left: auto; margin-right: auto; }

.section h3 {
  font-size: 19.2px;
  font-weight: 500;
  line-height: 1.5;
  color: var(--text-dim);
  padding-bottom: 3px;
}

.section p { margin-bottom: 26px; }

.section p:last-child { margin-bottom: 0; }

.spacer { height: 40px; }

.divider {
  border: 0;
  height: 1px;
  background: rgba(255, 255, 255, 0.4);
  margin: 10px 0;
}

/* Text links */
.text-link {
  color: var(--white);
  text-decoration: none;
}

.text-link:hover { text-decoration: underline; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  font-size: 18px;
  font-weight: 400;
  color: var(--white);
  background: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 5px;
  padding: 14px 32px;
  text-decoration: none;
  text-align: center;
  transition: background 0.15s, border-color 0.15s;
}

.btn:hover {
  background: #8a93ce;
  border-color: #8a93ce;
}

/* ---------- Gallery ---------- */
.gallery {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
}

.gallery.cols-3 { grid-template-columns: repeat(3, 1fr); }

.gallery a {
  display: block;
  border-radius: 5px;
  overflow: hidden;
}

.gallery img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: 5px;
  cursor: pointer;
  transition: opacity 0.15s;
}

.gallery img:hover { opacity: 0.88; }

/* ---------- Team columns ---------- */
.team-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  margin-top: 20px;
}

.team-card h1 {
  font-size: 29px;
  margin-bottom: 16px;
}

.team-card h1::after { display: none; }

.team-card p { margin-bottom: 24px; }

/* ---------- Contact ---------- */
.contact-label {
  color: var(--white);
  font-weight: 600;
  margin-bottom: 6px !important;
}

/* ---------- Lightbox ---------- */
.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.92);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.lightbox.open { display: flex; }

.lightbox img {
  max-width: 88vw;
  max-height: 88vh;
  border-radius: 4px;
}

.lightbox button {
  position: absolute;
  background: none;
  border: 0;
  color: rgba(255, 255, 255, 0.85);
  font-size: 44px;
  font-family: var(--font);
  cursor: pointer;
  padding: 16px;
  line-height: 1;
}

.lightbox button:hover { color: var(--white); }

.lightbox .lb-close { top: 12px; right: 20px; }
.lightbox .lb-prev { left: 12px; top: 50%; transform: translateY(-50%); }
.lightbox .lb-next { right: 12px; top: 50%; transform: translateY(-50%); }

/* ---------- Mobile ---------- */
@media (max-width: 1000px) {
  .main { margin-left: 0; }

  .sidebar {
    position: sticky;
    top: 0;
    width: 100%;
    height: auto;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    padding: 12px 20px;
  }

  .brand {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 0;
    text-align: left;
  }

  .brand-logo img { width: 56px; height: 56px; }

  .brand-title { margin-top: 0; font-size: 17px; line-height: 1.3; }

  .brand-slogan, .side-footer { display: none; }

  .menu-toggle { display: block; }

  .nav {
    display: none;
    position: fixed;
    top: 80px;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-side);
    z-index: 99;
  }

  .nav.open { display: flex; align-items: flex-start; }

  .nav ul { padding-top: 30px; }

  .nav li { padding: 14px 0; }

  .nav a { font-size: 18px; }

  .hero { height: 220px; }

  .hero h1 { font-size: 48px; }

  .section h1 { font-size: 30px; }

  .gallery, .gallery.cols-3 { grid-template-columns: repeat(3, 1fr); gap: 16px; }

  .team-grid { grid-template-columns: 1fr; }
}

@media (max-width: 600px) {
  .hero h1 { font-size: 38px; }

  .gallery, .gallery.cols-3 { grid-template-columns: repeat(2, 1fr); }
}