:root {
  --cubs-green-dark: #1b4332;
  --cubs-green: #2d6a4f;
  --cubs-green-light: #40916c;
  --text-dark: #1a1a1a;
  --text-muted: #555;
  --bg-subtle: #f6f9f7;
  --border: #e0e8e4;
}

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

body {
  font-family: 'Inter', 'Segoe UI', Arial, sans-serif;
  line-height: 1.7;
  color: var(--text-dark);
  background: #fff;
}

/* ── Navbar ── */
.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.9rem 2.5rem;
  background-color: var(--cubs-green-dark);
  color: #fff;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 12px rgba(0,0,0,0.15);
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  font-weight: 700;
  font-size: 1.05rem;
  color: #fff;
  text-decoration: none;
  letter-spacing: -0.01em;
}

.logo-img {
  height: 52px;
  width: 52px;
  border-radius: 50%;
  object-fit: cover;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 0.5rem;
  align-items: center;
}

.nav-links a {
  color: rgba(255,255,255,0.85);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  padding: 0.4rem 0.8rem;
  border-radius: 6px;
  transition: color 0.2s ease, background-color 0.2s ease;
}

.nav-links a:hover {
  color: #fff;
  background-color: rgba(255,255,255,0.1);
}

.btn-nav {
  background-color: var(--cubs-green-light);
  color: #fff !important;
  padding: 0.5rem 1.2rem;
  border-radius: 20px;
  font-weight: 600;
}

.btn-nav:hover {
  background-color: #fff !important;
  color: var(--cubs-green-dark) !important;
}

/* ── Hero ── */
.hero {
  position: relative;
  background-color: var(--cubs-green-dark);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4rem;
  flex-wrap: wrap;
  padding: 5rem 3rem;
  min-height: 70vh;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url('background photos/fresher.jpeg');
  background-size: cover;
  background-position: center 70%;
  filter: grayscale(100%) brightness(0.32);
  z-index: 0;
}

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

.hero-logo-badge {
  flex-shrink: 0;
  width: clamp(180px, 33vw, 340px);
  height: clamp(180px, 33vw, 340px);
  background-color: #fff;
  border-radius: 50%;
  overflow: hidden;
  box-shadow: 0 16px 48px rgba(0,0,0,0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.hero-logo-img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.hero-text {
  max-width: 480px;
}

.hero h1 {
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin-bottom: 1.1rem;
}

.hero p {
  font-size: 1.15rem;
  opacity: 0.88;
  line-height: 1.65;
}

/* ── Stats bar ── */
.stats {
  display: flex;
  justify-content: center;
  gap: 4rem;
  flex-wrap: wrap;
  padding: 2.5rem 2rem;
  background-color: var(--bg-subtle);
  border-bottom: 1px solid var(--border);
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.15rem;
}

.stat-number {
  font-size: 2rem;
  font-weight: 700;
  color: var(--cubs-green-dark);
  letter-spacing: -0.03em;
}

.stat-label {
  font-size: 0.78rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 500;
}

/* ── Sections ── */
.section {
  padding: 4rem 2rem;
  max-width: 900px;
  margin: 0 auto;
}

.section h2 {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
  color: var(--cubs-green-dark);
}

.section p {
  color: #444;
  font-size: 1.05rem;
}

/* ── What We Do ── */
.what-we-do-section {
  background: var(--bg-subtle);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 4rem 2rem;
}

.what-we-do-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 2rem;
  max-width: 1100px;
  margin: 0 auto;
}

.what-we-do-card {
  text-align: center;
  padding: 0 1rem;
}

.what-we-do-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--cubs-green-dark);
  margin-bottom: 0.75rem;
}

.what-we-do-card p {
  font-size: 0.95rem;
  color: #555;
  line-height: 1.7;
}

.pricing-note {
  text-align: center;
  margin-top: 2.5rem;
  font-size: 0.95rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.pricing-note i {
  color: var(--cubs-green-light);
}

/* ── Membership ── */
.membership-price {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--cubs-green-dark);
  margin-top: 1rem;
  letter-spacing: -0.01em;
}

.btn-cta {
  display: inline-block;
  margin-top: 1.2rem;
  background-color: var(--cubs-green-dark);
  color: #fff;
  text-decoration: none;
  font-weight: 600;
  font-size: 1rem;
  padding: 0.85rem 2rem;
  border-radius: 8px;
  transition: background-color 0.2s ease, transform 0.15s ease;
  box-shadow: 0 2px 8px rgba(27,67,50,0.25);
}

.btn-cta:hover {
  background-color: var(--cubs-green-light);
  transform: translateY(-1px);
}

/* ── Events list ── */
.events-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.events-list li {
  padding: 0.9rem 1rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-subtle);
  transition: border-color 0.2s ease;
}

.events-list li:hover {
  border-color: var(--cubs-green-light);
}

/* ── Events page header ── */
.page-header {
  position: relative;
  background-color: var(--cubs-green-dark);
  color: #fff;
  padding: 6rem 2.5rem;
  text-align: center;
}

.page-header > * {
  position: relative;
  z-index: 1;
}

.events-header::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url('background photos/Knowles talk linkedin .jpeg');
  background-size: cover;
  background-position: center;
  filter: grayscale(100%) brightness(0.3);
  z-index: 0;
}

.sponsorships-header::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url('background photos/hackathon.jpeg');
  background-size: cover;
  background-position: center 65%;
  filter: grayscale(100%) brightness(0.3);
  z-index: 0;
}

.page-header h1 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
}

.page-header p {
  font-size: 1.1rem;
  opacity: 0.85;
}

/* ── Past events gallery ── */
.gallery-section {
  padding: 4rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.gallery-section h2 {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--cubs-green-dark);
  margin-bottom: 2rem;
}

.poster-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1.5rem;
}

.poster-card {
  background: #fff;
  border-radius: 12px;
  border: 1px solid var(--border);
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  cursor: pointer;
}

.poster-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 28px rgba(0,0,0,0.12);
}

.poster-card img {
  width: 100%;
  aspect-ratio: 3/4;
  object-fit: cover;
  display: block;
}

.poster-card-body {
  padding: 0.9rem 1rem;
}

.poster-card-title {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-dark);
  margin-bottom: 0.2rem;
}

.poster-card-date {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* ── Lightbox (click poster to enlarge) ── */
.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.85);
  z-index: 999;
  align-items: center;
  justify-content: center;
}

.lightbox.open {
  display: flex;
}

.lightbox img {
  max-width: 90vw;
  max-height: 90vh;
  border-radius: 8px;
  object-fit: contain;
}

.lightbox-close {
  position: fixed;
  top: 1.2rem;
  right: 1.5rem;
  font-size: 2rem;
  color: #fff;
  cursor: pointer;
  background: none;
  border: none;
  line-height: 1;
}

/* ── Sponsorship page ── */
.sponsor-stats {
  display: flex;
  gap: 3rem;
  flex-wrap: wrap;
  margin-top: 2rem;
  padding: 2rem;
  background: var(--bg-subtle);
  border-radius: 12px;
  border: 1px solid var(--border);
}

.sponsor-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  flex: 1;
  min-width: 100px;
}

.sponsor-offer-section {
  background: var(--bg-subtle);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 1rem 0;
}

.offer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1.25rem;
  margin-top: 1.5rem;
}

.offer-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.4rem 1.2rem;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.offer-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.09);
}

.offer-icon {
  font-size: 1.5rem;
  color: var(--cubs-green-light);
  margin-bottom: 0.75rem;
}

.offer-title {
  font-weight: 700;
  font-size: 1rem;
  color: var(--cubs-green-dark);
  margin-bottom: 0.4rem;
}

.offer-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.55;
}

.sponsor-cta-section {
  padding: 4rem 2rem;
}

.sponsor-cta-box {
  max-width: 640px;
  margin: 0 auto;
  text-align: center;
  background: linear-gradient(135deg, var(--cubs-green-dark), var(--cubs-green));
  color: #fff;
  padding: 3rem 2.5rem;
  border-radius: 16px;
  box-shadow: 0 8px 32px rgba(27,67,50,0.2);
}

.sponsor-cta-box h2 {
  color: #fff;
  font-size: 1.8rem;
  margin-bottom: 0.75rem;
}

.sponsor-cta-box p {
  color: rgba(255,255,255,0.88);
  margin-bottom: 1.5rem;
  font-size: 1.05rem;
}

.sponsor-cta-box .btn-cta {
  background: #fff;
  color: var(--cubs-green-dark);
}

.sponsor-cta-box .btn-cta:hover {
  background: var(--bg-subtle);
}

/* ── Partner grid ── */
.partner-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.partner-card {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1.2rem;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #fff;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.partner-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.1);
}

.sponsors-section {
  padding-top: 1.5rem;
}

.sponsors-thankyou {
  color: var(--text-muted);
  font-style: italic;
  margin-bottom: 1.5rem;
}

.partner-logo-placeholder {
  flex-shrink: 0;
  width: 110px;
  height: 110px;
  background: var(--bg-subtle);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  color: var(--text-muted);
  border: 1px solid var(--border);
}

.sponsor-logo-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  margin-top: 1.5rem;
  align-items: center;
}

.sponsor-logo-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  padding: 1.5rem 2rem;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #fff;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  flex: 1;
  min-width: 180px;
}

.sponsor-logo-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.1);
}

.sponsor-logo-card img {
  width: 100%;
  max-width: 200px;
  height: 120px;
  object-fit: contain;
}

.sponsor-logo-name {
  font-weight: 600;
  font-size: 1rem;
  color: var(--text-muted);
}

.become-partner-btn {
  text-align: center;
  margin-top: 2rem;
}

.partner-logo-placeholder img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: 8px;
}

.partner-name {
  font-weight: 700;
  font-size: 1rem;
  color: var(--cubs-green-dark);
  margin-bottom: 0.3rem;
}

.partner-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ── Filter bar ── */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2rem;
}

.filter-btn {
  background: none;
  border: 1.5px solid var(--border);
  border-radius: 20px;
  padding: 0.4rem 1rem;
  font-family: 'Inter', sans-serif;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.2s ease;
}

.filter-btn:hover {
  border-color: var(--cubs-green-light);
  color: var(--cubs-green-dark);
}

.filter-btn.active {
  background-color: var(--cubs-green-dark);
  border-color: var(--cubs-green-dark);
  color: #fff;
}

/* ── Event category tags ── */
.event-tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  margin-bottom: 0.4rem;
}

.tag-speaker     { background: #d1fae5; color: #065f46; }
.tag-networking  { background: #dbeafe; color: #1e40af; }
.tag-hackathon   { background: #ede9fe; color: #5b21b6; }
.tag-collaboration { background: #fef3c7; color: #92400e; }
.tag-social      { background: #fce7f3; color: #9d174d; }

/* ── Hidden card state (used by filter JS) ── */
.poster-card.hidden {
  display: none;
}

/* ── Placeholder cards ── */
.poster-placeholder {
  width: 100%;
  aspect-ratio: 3/4;
  background: var(--bg-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* ── Leadership section ── */
.leadership-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.leader-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 0.75rem;
}

.leader-photo-placeholder {
  width: 110px;
  height: 110px;
  border-radius: 50%;
  background: var(--bg-subtle);
  border: 2px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  color: var(--cubs-green-light);
  overflow: hidden;
  transition: border-color 0.2s ease;
}

.leader-card:hover .leader-photo-placeholder {
  border-color: var(--cubs-green-light);
}

.leader-photo-placeholder img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
}

.leader-name {
  font-weight: 600;
  font-size: 1rem;
  color: var(--text-dark);
}

.leader-role {
  font-size: 0.85rem;
  color: var(--cubs-green);
  font-weight: 500;
}

/* ── Fade-in animation ── */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Footer ── */
footer {
  text-align: center;
  padding: 2rem;
  background-color: var(--cubs-green-dark);
  color: rgba(255,255,255,0.8);
  font-size: 0.9rem;
}

.social-links {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin-bottom: 1rem;
}

.social-links a {
  color: rgba(255,255,255,0.7);
  font-size: 1.4rem;
  transition: color 0.2s ease;
}

.social-links a:hover {
  color: #fff;
}