/* ========================================
   NextGen Biotech — Global Stylesheet
   ======================================== */

/* --- CSS Variables / Design Tokens --- */
:root {
  --clr-primary: #0a6e3a;
  --clr-primary-light: #11a355;
  --clr-primary-dark: #064d28;
  --clr-accent: #00c9a7;
  --clr-accent-light: #33f0cc;
  --clr-dark: #0d1117;
  --clr-darker: #060a10;
  --clr-surface: #161b22;
  --clr-surface-light: #1c2333;
  --clr-text: #e6edf3;
  --clr-text-muted: #8b949e;
  --clr-white: #ffffff;
  --clr-border: rgba(255,255,255,.08);
  --clr-glow: rgba(0,201,167,.25);
  --ff-heading: 'Inter', 'Segoe UI', system-ui, sans-serif;
  --ff-body: 'Inter', 'Segoe UI', system-ui, sans-serif;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 4px 24px rgba(0,0,0,.35);
  --transition: .3s cubic-bezier(.4,0,.2,1);
  --max-w: 1200px;
}

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--ff-body);
  background: var(--clr-dark);
  color: var(--clr-text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: var(--clr-accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--clr-accent-light); }
img { max-width: 100%; display: block; }
ul { list-style: none; }

/* --- Utility --- */
.container { width: 92%; max-width: var(--max-w); margin: 0 auto; }
.section { padding: 100px 0; }
.section-sm { padding: 60px 0; }
.text-center { text-align: center; }
.text-muted { color: var(--clr-text-muted); }

.section-label {
  display: inline-block;
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--clr-accent);
  margin-bottom: 12px;
}
.section-title {
  font-family: var(--ff-heading);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 20px;
}
.section-subtitle {
  font-size: 1.1rem;
  color: var(--clr-text-muted);
  max-width: 640px;
  margin: 0 auto 48px;
}

/* --- Buttons --- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 32px;
  border: none; border-radius: 50px; cursor: pointer;
  font-family: var(--ff-body); font-size: .95rem; font-weight: 600;
  transition: all var(--transition);
  text-decoration: none;
}
.btn-primary {
  background: linear-gradient(135deg, var(--clr-primary), var(--clr-accent));
  color: var(--clr-white);
  box-shadow: 0 4px 20px var(--clr-glow);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px var(--clr-glow);
  color: var(--clr-white);
}
.btn-outline {
  background: transparent;
  border: 2px solid var(--clr-accent);
  color: var(--clr-accent);
}
.btn-outline:hover {
  background: var(--clr-accent);
  color: var(--clr-dark);
}
.btn-sm { padding: 10px 22px; font-size: .85rem; }

/* --- Header / Navbar --- */
.header {
  position: fixed; top: 0; left: 0; width: 100%; z-index: 1000;
  background: rgba(13,17,23,.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--clr-border);
  transition: background var(--transition);
}
.header .container {
  display: flex; align-items: center; justify-content: space-between;
  height: 72px;
}
.logo {
  display: flex; align-items: center; gap: 10px;
  font-size: 1.35rem; font-weight: 800; color: var(--clr-white);
  letter-spacing: -.5px;
}
.logo .logo-icon {
  width: 36px; height: 36px;
  background: linear-gradient(135deg, var(--clr-primary), var(--clr-accent));
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem; color: #fff;
}
.nav-links { display: flex; align-items: center; gap: 32px; }
.nav-links a {
  color: var(--clr-text-muted);
  font-size: .9rem; font-weight: 500;
  transition: color var(--transition);
  position: relative;
}
.nav-links a::after {
  content: ''; position: absolute; bottom: -4px; left: 0;
  width: 0; height: 2px; background: var(--clr-accent);
  transition: width var(--transition);
}
.nav-links a:hover, .nav-links a.active { color: var(--clr-white); }
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }

/* Mobile hamburger */
.hamburger {
  display: none; flex-direction: column; gap: 5px;
  cursor: pointer; background: none; border: none; padding: 4px;
}
.hamburger span {
  width: 26px; height: 2px; background: var(--clr-text);
  border-radius: 2px; transition: var(--transition);
}
.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px,-5px); }

@media (max-width: 768px) {
  .hamburger { display: flex; }
  .nav-links {
    position: fixed; top: 72px; left: 0; width: 100%;
    flex-direction: column; gap: 0;
    background: rgba(13,17,23,.97);
    backdrop-filter: blur(20px);
    max-height: 0; overflow: hidden;
    transition: max-height .4s ease;
  }
  .nav-links.open { max-height: 500px; }
  .nav-links a { padding: 16px 24px; width: 100%; border-bottom: 1px solid var(--clr-border); }
}

/* --- Hero Section --- */
.hero {
  position: relative; min-height: 100vh;
  display: flex; align-items: center;
  overflow: hidden;
  padding-top: 72px;
}
.hero-bg {
  position: absolute; inset: 0; z-index: 0;
  background:
    radial-gradient(ellipse 80% 60% at 20% 40%, rgba(10,110,58,.3), transparent),
    radial-gradient(ellipse 60% 50% at 80% 60%, rgba(0,201,167,.15), transparent),
    var(--clr-darker);
}
.hero-particles {
  position: absolute; inset: 0; z-index: 1;
  background-image:
    radial-gradient(2px 2px at 10% 20%, rgba(0,201,167,.4), transparent),
    radial-gradient(2px 2px at 30% 70%, rgba(0,201,167,.3), transparent),
    radial-gradient(2px 2px at 50% 30%, rgba(0,201,167,.25), transparent),
    radial-gradient(2px 2px at 70% 80%, rgba(0,201,167,.35), transparent),
    radial-gradient(2px 2px at 90% 50%, rgba(0,201,167,.2), transparent),
    radial-gradient(1.5px 1.5px at 15% 55%, rgba(255,255,255,.15), transparent),
    radial-gradient(1.5px 1.5px at 85% 25%, rgba(255,255,255,.1), transparent);
  animation: float-particles 20s linear infinite;
}
@keyframes float-particles {
  0% { transform: translateY(0); }
  50% { transform: translateY(-20px); }
  100% { transform: translateY(0); }
}
.hero .container { position: relative; z-index: 2; }
.hero-content { max-width: 720px; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 18px; border-radius: 50px;
  background: rgba(0,201,167,.1);
  border: 1px solid rgba(0,201,167,.25);
  font-size: .8rem; font-weight: 600; color: var(--clr-accent);
  margin-bottom: 28px;
}
.hero-badge .dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--clr-accent);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: .5; transform: scale(1.4); }
}
.hero-title {
  font-family: var(--ff-heading);
  font-size: clamp(2.5rem, 6vw, 4.2rem);
  font-weight: 900; line-height: 1.1;
  margin-bottom: 24px;
}
.hero-title .highlight {
  background: linear-gradient(135deg, var(--clr-accent), var(--clr-primary-light));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-desc {
  font-size: 1.15rem; color: var(--clr-text-muted);
  margin-bottom: 40px; max-width: 560px;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 16px; }

/* Stats bar */
.hero-stats {
  display: flex; gap: 48px; margin-top: 64px;
  padding-top: 40px; border-top: 1px solid var(--clr-border);
}
.hero-stat h3 {
  font-size: 2.2rem; font-weight: 800;
  background: linear-gradient(135deg, var(--clr-accent), var(--clr-primary-light));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-stat p { font-size: .85rem; color: var(--clr-text-muted); }

@media (max-width: 600px) {
  .hero-stats { flex-direction: column; gap: 20px; }
}

/* --- Cards Grid --- */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 28px;
}
.card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  padding: 36px 32px;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.card::before {
  content: ''; position: absolute; top: 0; left: 0;
  width: 100%; height: 3px;
  background: linear-gradient(90deg, var(--clr-primary), var(--clr-accent));
  opacity: 0; transition: opacity var(--transition);
}
.card:hover {
  transform: translateY(-4px);
  border-color: rgba(0,201,167,.2);
  box-shadow: 0 8px 32px rgba(0,201,167,.1);
}
.card:hover::before { opacity: 1; }
.card-icon {
  width: 56px; height: 56px;
  background: linear-gradient(135deg, rgba(0,201,167,.15), rgba(10,110,58,.15));
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem; margin-bottom: 20px;
}
.card h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: 12px; }
.card p { color: var(--clr-text-muted); font-size: .95rem; }

/* --- About Page --- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
@media (max-width: 768px) { .about-grid { grid-template-columns: 1fr; } }
.about-visual {
  position: relative;
  background: linear-gradient(135deg, rgba(10,110,58,.2), rgba(0,201,167,.1));
  border-radius: var(--radius);
  padding: 48px;
  border: 1px solid var(--clr-border);
  min-height: 400px;
  display: flex; align-items: center; justify-content: center;
}
.dna-helix {
  font-size: 6rem; opacity: .7;
  animation: rotate-slow 12s linear infinite;
}
@keyframes rotate-slow {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}
.about-text h2 { font-size: 2rem; margin-bottom: 20px; }
.about-text p { color: var(--clr-text-muted); margin-bottom: 16px; }
.feature-list { margin-top: 24px; }
.feature-list li {
  display: flex; align-items: flex-start; gap: 12px;
  margin-bottom: 16px; color: var(--clr-text-muted);
}
.feature-list li .check {
  flex-shrink: 0; width: 24px; height: 24px;
  background: rgba(0,201,167,.15);
  border-radius: 50%; display: flex; align-items: center; justify-content: center;
  color: var(--clr-accent); font-size: .75rem; margin-top: 2px;
}

/* --- Events --- */
.events-list { display: flex; flex-direction: column; gap: 24px; }
.event-card {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 28px;
  align-items: center;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  padding: 28px 32px;
  transition: all var(--transition);
}
.event-card:hover {
  border-color: rgba(0,201,167,.2);
  box-shadow: 0 4px 24px rgba(0,201,167,.08);
}
.event-date {
  text-align: center;
  background: linear-gradient(135deg, rgba(0,201,167,.12), rgba(10,110,58,.12));
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  min-width: 80px;
}
.event-date .month { font-size: .75rem; font-weight: 700; text-transform: uppercase; color: var(--clr-accent); letter-spacing: 1px; }
.event-date .day { font-size: 1.8rem; font-weight: 800; line-height: 1.2; }
.event-date .year { font-size: .75rem; color: var(--clr-text-muted); }
.event-info h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 6px; }
.event-info p { color: var(--clr-text-muted); font-size: .9rem; }
.event-meta { display: flex; gap: 16px; margin-top: 8px; font-size: .8rem; color: var(--clr-text-muted); }
.event-meta span { display: flex; align-items: center; gap: 4px; }

@media (max-width: 768px) {
  .event-card { grid-template-columns: 1fr; text-align: center; }
  .event-date { margin: 0 auto; }
  .event-actions { margin: 0 auto; }
}

/* --- Contact Form --- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}
@media (max-width: 768px) { .contact-grid { grid-template-columns: 1fr; } }
.form-group { margin-bottom: 20px; }
.form-group label {
  display: block; font-size: .85rem; font-weight: 600;
  margin-bottom: 8px; color: var(--clr-text);
}
.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 14px 18px;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-sm);
  color: var(--clr-text);
  font-family: var(--ff-body);
  font-size: .95rem;
  transition: border-color var(--transition);
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--clr-accent);
  box-shadow: 0 0 0 3px var(--clr-glow);
}
.form-group textarea { resize: vertical; min-height: 140px; }

.contact-info-item {
  display: flex; gap: 16px; align-items: flex-start;
  margin-bottom: 28px;
}
.contact-info-item .icon {
  width: 48px; height: 48px; flex-shrink: 0;
  background: rgba(0,201,167,.1);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem;
}
.contact-info-item h4 { font-size: 1rem; margin-bottom: 4px; }
.contact-info-item p { color: var(--clr-text-muted); font-size: .9rem; }

/* --- Footer --- */
.footer {
  background: var(--clr-darker);
  border-top: 1px solid var(--clr-border);
  padding: 60px 0 30px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}
@media (max-width: 768px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 480px) { .footer-grid { grid-template-columns: 1fr; } }
.footer-about .logo { margin-bottom: 16px; }
.footer-about p { color: var(--clr-text-muted); font-size: .9rem; }
.footer h4 {
  font-size: .85rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 2px;
  color: var(--clr-text); margin-bottom: 20px;
}
.footer ul li { margin-bottom: 10px; }
.footer ul li a { color: var(--clr-text-muted); font-size: .9rem; }
.footer ul li a:hover { color: var(--clr-accent); }
.footer-bottom {
  display: flex; justify-content: space-between; align-items: center;
  padding-top: 28px; border-top: 1px solid var(--clr-border);
  font-size: .85rem; color: var(--clr-text-muted);
}
@media (max-width: 600px) {
  .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
}

/* --- Modal --- */
.modal-overlay {
  position: fixed; inset: 0; z-index: 2000;
  background: rgba(0,0,0,.7);
  backdrop-filter: blur(8px);
  display: flex; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none;
  transition: opacity var(--transition);
}
.modal-overlay.active { opacity: 1; pointer-events: all; }
.modal {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  padding: 40px;
  max-width: 520px; width: 92%;
  max-height: 90vh; overflow-y: auto;
  transform: translateY(20px);
  transition: transform var(--transition);
}
.modal-overlay.active .modal { transform: translateY(0); }
.modal-header {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 24px;
}
.modal-header h2 { font-size: 1.4rem; font-weight: 700; }
.modal-close {
  width: 36px; height: 36px;
  background: rgba(255,255,255,.05);
  border: 1px solid var(--clr-border);
  border-radius: 50%; cursor: pointer;
  color: var(--clr-text-muted); font-size: 1.1rem;
  display: flex; align-items: center; justify-content: center;
  transition: all var(--transition);
}
.modal-close:hover { background: rgba(255,255,255,.1); color: var(--clr-text); }

/* --- Toast Notification --- */
.toast {
  position: fixed; bottom: 32px; right: 32px; z-index: 3000;
  padding: 16px 24px; border-radius: var(--radius-sm);
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  color: var(--clr-text);
  font-size: .9rem; font-weight: 500;
  box-shadow: var(--shadow);
  transform: translateX(120%);
  transition: transform .4s ease;
}
.toast.show { transform: translateX(0); }
.toast.success { border-left: 4px solid var(--clr-accent); }
.toast.error { border-left: 4px solid #f85149; }

/* --- Page Header (inner pages) --- */
.page-header {
  padding: 140px 0 60px;
  background:
    radial-gradient(ellipse 60% 50% at 50% 0%, rgba(0,201,167,.08), transparent),
    var(--clr-darker);
  border-bottom: 1px solid var(--clr-border);
}
.page-header h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800; margin-bottom: 12px;
}
.page-header p { color: var(--clr-text-muted); font-size: 1.1rem; max-width: 560px; margin: 0 auto; }

/* --- Animations --- */
.fade-in {
  opacity: 0; transform: translateY(30px);
  transition: opacity .6s ease, transform .6s ease;
}
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* --- Scrollbar --- */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--clr-dark); }
::-webkit-scrollbar-thumb { background: var(--clr-surface-light); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--clr-text-muted); }

/* --- Admin Styles --- */
.admin-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 24px;
}
.admin-table th, .admin-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--clr-border);
  font-size: .9rem;
}
.admin-table th {
  background: var(--clr-surface);
  font-weight: 700;
  color: var(--clr-accent);
  text-transform: uppercase;
  font-size: .75rem;
  letter-spacing: 1px;
}
.admin-table tr:hover td { background: rgba(0,201,167,.03); }
.admin-tabs { display: flex; gap: 12px; margin-bottom: 32px; }
.admin-tab {
  padding: 10px 20px; border-radius: 50px; cursor: pointer;
  background: var(--clr-surface); border: 1px solid var(--clr-border);
  color: var(--clr-text-muted); font-size: .85rem; font-weight: 600;
  transition: all var(--transition);
}
.admin-tab.active, .admin-tab:hover {
  background: var(--clr-accent); color: var(--clr-dark); border-color: var(--clr-accent);
}

/* --- Misc --- */
.badge {
  display: inline-block;
  padding: 4px 12px; border-radius: 50px;
  font-size: .75rem; font-weight: 700;
  background: rgba(0,201,167,.12); color: var(--clr-accent);
}
.divider {
  height: 1px;
  background: var(--clr-border);
  margin: 48px 0;
}