:root {
  --bg: #0b0c10;
  --bg-alt: #121319;
  --card: #16171f;
  --border: #23242e;
  --text: #f2f3f5;
  --text-dim: #9a9ca6;
  --accent: #6ee7c8;
  --accent-dim: rgba(110, 231, 200, 0.12);
  --font-body: 'Inter', system-ui, sans-serif;
  --font-head: 'Space Grotesk', system-ui, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}

h1, h2, h3, h4 {
  font-family: var(--font-head);
  font-weight: 600;
  line-height: 1.2;
}

a {
  color: inherit;
  text-decoration: none;
}

/* Header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(11, 12, 16, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  font-family: var(--font-head);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.logo span {
  color: var(--accent);
}

.nav {
  display: flex;
  align-items: center;
  gap: 32px;
  font-size: 0.95rem;
  color: var(--text-dim);
}

.nav a {
  transition: color 0.2s ease;
}

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

.nav-cta {
  padding: 8px 18px;
  border-radius: 999px;
  border: 1px solid var(--accent);
  color: var(--text) !important;
}

.nav-cta:hover {
  background: var(--accent-dim);
}

/* Hero */

.hero {
  padding: 120px 0 96px;
  border-bottom: 1px solid var(--border);
}

.hero-inner {
  max-width: 760px;
}

.eyebrow {
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  margin-bottom: 20px;
}

.hero-sub {
  color: var(--text-dim);
  font-size: 1.1rem;
  max-width: 60ch;
  margin-bottom: 36px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn {
  padding: 12px 26px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: all 0.2s ease;
  display: inline-block;
}

.btn-primary {
  background: var(--accent);
  color: #06110d;
}

.btn-primary:hover {
  opacity: 0.9;
}

.btn-ghost {
  border: 1px solid var(--border);
  color: var(--text);
}

.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* About */

.about {
  padding: 96px 0;
  border-bottom: 1px solid var(--border);
}

.about h2 {
  font-size: 2rem;
  margin-bottom: 24px;
}

.about p {
  color: var(--text-dim);
  max-width: 70ch;
  font-size: 1.05rem;
}

/* Section shared */

.team, .future {
  padding: 96px 0;
}

.team {
  border-bottom: 1px solid var(--border);
  background: var(--bg-alt);
}

.team h2, .future h2 {
  font-size: 2rem;
  margin-bottom: 8px;
}

.section-sub {
  color: var(--text-dim);
  margin-bottom: 48px;
}

/* Team grid */

.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.member-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px 28px;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.member-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
}

.member-photo {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--accent-dim);
  color: var(--accent);
  font-family: var(--font-head);
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
  margin-bottom: 20px;
}

.member-card h3 {
  font-size: 1.15rem;
  margin-bottom: 4px;
}

.role {
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  margin-bottom: 20px;
}

.member-block {
  margin-top: 18px;
}

.member-block h4 {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  margin-bottom: 8px;
}

.member-block ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.member-block li {
  font-size: 0.92rem;
  color: var(--text);
  padding-left: 16px;
  position: relative;
}

.member-block li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

.member-block p {
  font-size: 0.92rem;
  color: var(--text);
}

/* Future projects */

.future-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
}

.future-card {
  display: block;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.future-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
}

.future-tag {
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.future-card h3 {
  font-size: 1.1rem;
  margin: 12px 0 10px;
}

.future-card p {
  color: var(--text-dim);
  font-size: 0.95rem;
}

.future-link {
  display: inline-block;
  margin-top: 16px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text);
}

.future-card:hover .future-link {
  color: var(--accent);
}

/* Project detail pages */

.project-hero {
  padding: 88px 0 56px;
  border-bottom: 1px solid var(--border);
}

.back-link {
  display: inline-block;
  color: var(--text-dim);
  font-size: 0.9rem;
  margin-bottom: 24px;
  transition: color 0.2s ease;
}

.back-link:hover {
  color: var(--accent);
}

.project-hero .future-tag {
  display: inline-block;
  margin-bottom: 16px;
}

.project-hero h1 {
  font-size: clamp(2rem, 4.5vw, 2.8rem);
  margin-bottom: 18px;
}

.project-hero .hero-sub {
  margin-bottom: 0;
}

.project-content {
  padding: 72px 0;
}

.project-content h2 {
  font-size: 1.5rem;
  margin: 40px 0 16px;
}

.project-content h2:first-child {
  margin-top: 0;
}

.project-content p {
  color: var(--text-dim);
  max-width: 70ch;
  font-size: 1.02rem;
  margin-bottom: 16px;
}

.project-content ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-width: 70ch;
}

.project-content li {
  font-size: 1rem;
  color: var(--text);
  padding-left: 18px;
  position: relative;
}

.project-content li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

.project-meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 24px;
  margin-top: 32px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
  max-width: 70ch;
}

.project-meta div h4 {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  margin-bottom: 6px;
}

.project-meta div p {
  color: var(--text);
  font-size: 0.95rem;
  margin-bottom: 0;
}

/* Stat grid */

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 16px;
  max-width: 70ch;
  margin: 24px 0 28px;
}

.stat-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px 18px;
}

.stat-number {
  font-family: var(--font-head);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1.15;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-dim);
  margin-top: 8px;
}

/* Problem / fix list */

.fix-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
  max-width: 70ch;
  margin: 24px 0 8px;
}

.fix-item {
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 24px 26px;
  background: var(--card);
}

.fix-label {
  font-size: 0.74rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 6px;
  display: block;
}

.fix-problem-label {
  color: #e8917a;
}

.fix-solution-label {
  color: var(--accent);
}

.fix-item p {
  color: var(--text);
  font-size: 0.95rem;
  max-width: none;
  margin-bottom: 18px;
}

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

.fix-item h3 {
  font-size: 1.05rem;
  margin-bottom: 14px;
}

/* Sources */

.sources-note {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  max-width: 70ch;
}

.sources-note h4 {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  margin-bottom: 10px;
}

.sources-note ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.sources-note li {
  font-size: 0.8rem;
}

.sources-note a {
  color: var(--text-dim);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color 0.2s ease;
}

.sources-note a:hover {
  color: var(--accent);
}

/* Footer */

.site-footer {
  padding: 40px 0;
  border-top: 1px solid var(--border);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  color: var(--text-dim);
  font-size: 0.9rem;
}

.footer-email {
  color: var(--text-dim);
  transition: color 0.2s ease;
}

.footer-email:hover {
  color: var(--accent);
}

/* Sponsorship */

.sponsor-box {
  margin-top: 40px;
  padding: 32px;
  border: 1px solid var(--accent);
  border-radius: 16px;
  background: var(--accent-dim);
  max-width: 70ch;
}

.sponsor-box h2 {
  margin-top: 0;
  margin-bottom: 12px;
}

.sponsor-box p {
  color: var(--text);
  margin-bottom: 24px;
}

/* Responsive */

@media (max-width: 640px) {
  .nav {
    gap: 16px;
    font-size: 0.85rem;
  }
  .nav-cta {
    padding: 6px 14px;
  }
  .hero {
    padding: 88px 0 64px;
  }
}