:root {
  /* DUMUN 27 palette */
  --lavender: #AFC6FF;
  --blue:     #9ED9F7;
  --mint:     #A0E6E4;
  --teal:     #A8F0E6;

  /* neutrals */
  --ink:      #1a2238;
  --ink-soft: #4a5270;
  --paper:    #ffffff;
  --paper-2:  #f6f8ff;

  /* brand accent (mid of palette) */
  --accent:   #7ab7e8;
  --accent-2: #8ba7ff;

  /* gradients from the design doc */
  --grad-upright:  linear-gradient(180deg,
                    var(--lavender) 0%,
                    var(--blue)     40%,
                    var(--mint)     75%,
                    var(--teal)    100%);
  --grad-sideways: linear-gradient(110deg,
                    var(--lavender) 0%,
                    var(--blue)     40%,
                    var(--mint)     75%,
                    var(--teal)    100%);

  --serif: 'Cormorant Garamond', serif;
  --sans:  'DM Sans', sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--sans);
  background: var(--paper);
  color: var(--ink);
  line-height: 1.6;
}

/* NAV */
nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  position: fixed;
  width: 100%;
  box-sizing: border-box;
  background: rgba(255, 255, 255, 0.75);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(26, 34, 56, 0.06);
  z-index: 50;
  transition: background 0.3s ease, box-shadow 0.3s ease;
}

nav.scrolled {
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 0 2px 20px rgba(26, 34, 56, 0.06);
}

.nav-logo {
  font-family: var(--serif);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: 0.02em;
}

.nav-logo span {
  background: var(--grad-sideways);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-left: 0.3rem;
  font-weight: 600;
}

.nav-logo img {
  height: auto;
  width: 200px;
}

.nav-links {
  display: flex;
  gap: 1.75rem;
  list-style: none;
  margin: 0;
  padding: 0;
  align-items: center;
}

.nav-links a {
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 0.95rem;
  transition: color 0.2s ease;
}

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

.nav-cta {
  border: 1px solid transparent;
  padding: 8px 16px;
  border-radius: 999px;
  background: var(--grad-sideways);
  color: var(--ink) !important;
  font-weight: 500;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(138, 167, 255, 0.35);
}

.nav-toggle {
  display: none;
  cursor: pointer;
  font-size: 1.4rem;
}

/* HERO */
#hero {
  position: relative;
  height: 100vh;
  min-height: 640px;
  display: flex;
  justify-content: center;
  align-items: center;
  text-align: center;
  overflow: hidden;
  color: var(--ink);
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: var(--grad-upright);
  z-index: 0;
}

/* soft blur blobs for depth on the gradient */
.hero-bg::before,
.hero-bg::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.7;
}

.hero-bg::before {
  width: 520px;
  height: 520px;
  background: var(--lavender);
  top: -120px;
  left: -120px;
}

.hero-bg::after {
  width: 620px;
  height: 620px;
  background: var(--teal);
  bottom: -180px;
  right: -180px;
}

.hero-content {
  position: relative;
  z-index: 1;
  padding: 0 1.5rem;
}

.hero-eyebrow {
  font-size: 0.85rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 1.5rem;
}

.hero-title {
  font-family: var(--serif);
  font-size: 6rem;
  line-height: 0.95;
  margin: 0 0 1.5rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.hero-title em {
  font-style: normal;
  font-weight: 700;
  background: linear-gradient(110deg, #6e8fff 0%, #3fa8d6 55%, #4fb8a8 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-subtitle {
  font-family: var(--serif);
  font-size: 1.6rem;
  font-style: italic;
  color: var(--ink);
  margin: 0 0 0.5rem;
}

.hero-date {
  font-size: 0.95rem;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
  margin: 0;
}

.hero-actions {
  display: inline-flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 1rem;
}

/* BUTTONS */
.btn-primary,
.btn-outline {
  display: inline-block;
  padding: 12px 26px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn-primary {
  background: var(--grad-sideways);
  color: var(--ink);
  border: 1px solid transparent;
  box-shadow: 0 8px 24px rgba(138, 167, 255, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(138, 167, 255, 0.5);
}

.btn-outline {
  border: 1px solid var(--ink);
  color: var(--ink);
  background: transparent;
}

.btn-outline:hover {
  background: var(--ink);
  color: var(--paper);
}

/* GRID / SECTIONS */
.container {
  max-width: 1100px;
  margin: auto;
  padding: 5rem 1.5rem;
}

section {
  position: relative;
}

#about {
  background: var(--paper);
}

#committees {
  background: var(--paper-2);
}

#members {
  background: var(--paper);
}

#instagram {
  background: var(--paper-2);
  text-align: center;
}

#sponsors {
  background: var(--paper);
  text-align: center;
}

.section-label {
  font-size: 0.8rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.75rem;
  font-weight: 500;
}

.section-title {
  font-family: var(--serif);
  font-size: 2.75rem;
  line-height: 1.1;
  margin: 0 0 1.5rem;
  font-weight: 600;
  color: var(--ink);
}

.section-title em {
  font-style: normal;
  background: var(--grad-sideways);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-weight: 700;
}

.section-desc {
  color: var(--ink-soft);
  font-size: 1.05rem;
  max-width: 55ch;
}

/* ABOUT */
.about-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 3rem;
  align-items: center;
}

.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.stat-box {
  padding: 1.75rem 1.25rem;
  border-radius: 18px;
  background: var(--grad-upright);
  color: var(--ink);
  text-align: center;
  font-size: 0.9rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  box-shadow: 0 10px 30px rgba(138, 167, 255, 0.2);
}

.stat-box span {
  display: block;
  font-family: var(--serif);
  font-size: 2.4rem;
  font-weight: 700;
  text-transform: none;
  letter-spacing: normal;
  margin-bottom: 0.25rem;
}

/* COMMITTEES */
.committees-grid,
.members-grid {
  display: grid;
  gap: 1.25rem;
}

.committees-grid {
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  margin-top: 2.5rem;
}

.committee-card {
  text-align: center;
  padding: 2rem 1.25rem;
  background: var(--paper);
  border: 1px solid rgba(26, 34, 56, 0.08);
  border-radius: 18px;
  position: relative;
  overflow: hidden;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.committee-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--grad-sideways);
  opacity: 0;
  transition: opacity 0.25s ease;
  z-index: 0;
}

.committee-card > * {
  position: relative;
  z-index: 1;
}

.committee-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 36px rgba(138, 167, 255, 0.25);
  border-color: transparent;
}

.committee-card:hover::before {
  opacity: 0.35;
}

.committee-card h3 {
  font-family: var(--serif);
  font-size: 1.35rem;
  margin: 0 0 0.5rem;
  color: var(--ink);
}

.committee-card p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

/* MEMBERS */
.members-grid {
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  margin-top: 2.5rem;
}

.members-grid-2 {
  grid-template-columns: repeat(2, 1fr);
  max-width: 460px;
  margin: 2.5rem auto 3rem;
}

.members-grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

.member-card {
  text-align: center;
}

.member-avatar {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  overflow: hidden;
  margin: 0 auto 1rem;
  padding: 3px;
  background: var(--grad-sideways);
  box-shadow: 0 10px 24px rgba(138, 167, 255, 0.25);
}

.member-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
  background: var(--paper);
}

.member-card h3 {
  font-family: var(--serif);
  font-size: 1.1rem;
  margin: 0 0 0.2rem;
  color: var(--ink);
}

.member-card p {
  margin: 0;
  font-size: 0.85rem;
  color: var(--ink-soft);
  letter-spacing: 0.05em;
}

/* INSTAGRAM */
.insta-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin: 2rem 0;
  border-radius: 18px;
  overflow: hidden;
}

.insta-grid img {
  width: 100%;
  display: block;
  aspect-ratio: 1;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.insta-grid img:hover {
  transform: scale(1.03);
}

/* SPONSORS */
.sponsors-row {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 2rem;
}

.sponsor-box {
  border: 1px solid rgba(26, 34, 56, 0.12);
  padding: 1.5rem 2.5rem;
  border-radius: 14px;
  color: var(--ink-soft);
  background: var(--paper);
  transition: border-color 0.25s ease, color 0.25s ease;
}

.sponsor-box:hover {
  border-color: var(--accent);
  color: var(--ink);
}

/* FOOTER */
footer {
  width: 100%;
  text-align: center;
  padding: 2rem 1rem;
  background: var(--ink);
  color: var(--paper-2);
  font-size: 0.9rem;
  position: relative;
}

footer::before {
  content: "";
  display: block;
  height: 3px;
  width: 100%;
  background: var(--grad-sideways);
  position: absolute;
  top: 0;
  left: 0;
}

/* MOBILE */
@media (max-width: 900px) {
  .nav-links {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 100%;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    padding: 1.5rem 2rem;
    border-radius: 0 0 0 18px;
    box-shadow: 0 12px 30px rgba(26, 34, 56, 0.1);
  }

  .nav-links.open {
    display: flex;
  }

  .nav-toggle {
    display: block;
  }

  .hero-title {
    font-size: 4rem;
  }

  .section-title {
    font-size: 2rem;
  }

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

  .members-grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

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