:root {
  --bg: #060807;
  --bg-alt: #0d1210;
  --surface: #101613;
  --border: #1f2a25;
  --text: #f4f7f5;
  --text-muted: #9aa79f;
  --green-lime: #9ede4a;
  --green: #3fb87a;
  --teal: #12877a;
  --gradient: linear-gradient(135deg, var(--green-lime), var(--green) 55%, var(--teal));
  --radius: 14px;
  --max-width: 1120px;
  --font-display: "Space Grotesk", sans-serif;
  --font-body: "Inter", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.15;
  margin: 0 0 0.5em;
}

p {
  margin: 0 0 1em;
  color: var(--text-muted);
}

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

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

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.gradient-text {
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--green);
  margin-bottom: 0.75em;
}

.section-lead {
  max-width: 640px;
  font-size: 1.05rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 12px 22px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, opacity 0.15s ease, border-color 0.15s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn:disabled:hover {
  transform: none;
}

.btn-primary {
  background: var(--gradient);
  color: #06120c;
}

.btn-primary:hover {
  opacity: 0.92;
}

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

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

.btn-small {
  padding: 9px 18px;
  font-size: 0.85rem;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(6, 8, 7, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  padding-bottom: 14px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-mark {
  width: 30px;
  height: 30px;
}

.brand-name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.05rem;
}

.brand-name-light {
  color: var(--text-muted);
  font-weight: 500;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  font-size: 0.92rem;
  font-weight: 500;
}

.main-nav a {
  color: var(--text-muted);
  transition: color 0.15s ease;
}

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

.nav-cta {
  padding: 8px 18px;
  border-radius: 999px;
  background: var(--gradient);
  color: #06120c !important;
  font-weight: 600;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}

.nav-toggle span {
  display: block;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
}

/* Hero */
.hero {
  padding: 120px 0 90px;
  background:
    radial-gradient(circle at 15% 0%, rgba(158, 222, 74, 0.08), transparent 45%),
    radial-gradient(circle at 85% 20%, rgba(18, 135, 122, 0.14), transparent 50%);
}

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

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  margin-bottom: 0.4em;
}

.hero-sub {
  font-size: 1.1rem;
  max-width: 560px;
}

.hero-actions {
  display: flex;
  gap: 14px;
  margin-top: 32px;
  flex-wrap: wrap;
}

/* Sections */
section {
  padding: 90px 0;
  border-top: 1px solid var(--border);
}

section h2 {
  font-size: clamp(1.7rem, 3.5vw, 2.3rem);
}

.mission {
  background: var(--bg-alt);
}

.pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.pillar {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
}

.pillar-icon {
  color: var(--green);
  font-size: 1.1rem;
  margin-bottom: 12px;
}

.pillar h3 {
  font-size: 1.1rem;
  margin-bottom: 0.4em;
}

.pillar p {
  margin: 0;
  font-size: 0.95rem;
}

/* Solutions */
.solutions-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.solution-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  display: flex;
  flex-direction: column;
}

.solution-card--live {
  border-color: rgba(63, 184, 122, 0.4);
  background: linear-gradient(180deg, rgba(63, 184, 122, 0.08), rgba(16, 22, 19, 0));
}

.solution-card--soon {
  opacity: 0.7;
}

.solution-card-head {
  margin-bottom: 14px;
}

.solution-tag {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--gradient);
  color: #06120c;
}

.solution-tag--soon {
  background: var(--border);
  color: var(--text-muted);
}

.solution-card h3 {
  font-size: 1.3rem;
}

.solution-card p {
  flex: 1;
  font-size: 0.95rem;
}

.solution-card .btn {
  align-self: flex-start;
  margin-top: 12px;
}

/* Research */
.research {
  background: var(--bg-alt);
}

.paper-card {
  margin-top: 40px;
  display: flex;
  align-items: center;
  gap: 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  flex-wrap: wrap;
}

.paper-card-icon {
  font-size: 2rem;
}

.paper-card-body {
  flex: 1;
  min-width: 220px;
}

.paper-card-body h3 {
  font-size: 1.15rem;
  margin-bottom: 0.3em;
}

.paper-card-body p {
  margin: 0;
  font-size: 0.95rem;
}

/* Partners */
.partner-card {
  margin-top: 40px;
  display: flex;
  align-items: center;
  gap: 28px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  flex-wrap: wrap;
}

.partner-logo {
  width: 96px;
  height: 96px;
  object-fit: contain;
  border-radius: 10px;
  background: #fff;
  padding: 8px;
}

.partner-card h3 {
  font-size: 1.15rem;
}

.partner-card p {
  margin: 0;
  max-width: 520px;
}

/* Contact */
.contact-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: start;
}

.contact-email {
  display: inline-block;
  margin-top: 8px;
  font-weight: 600;
  color: var(--green);
  font-size: 1.05rem;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 6px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
}

.contact-form label {
  font-size: 0.85rem;
  font-weight: 600;
  margin-top: 12px;
  color: var(--text-muted);
}

.contact-form input,
.contact-form textarea {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 0.95rem;
  resize: vertical;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--green);
}

.contact-form button {
  margin-top: 20px;
  align-self: flex-start;
}

.form-note {
  font-size: 0.85rem;
  margin: 10px 0 0;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 40px 0;
  background: var(--bg-alt);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-family: var(--font-display);
}

.footer-nav {
  display: flex;
  gap: 22px;
  font-size: 0.9rem;
  color: var(--text-muted);
}

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

.footer-copy {
  font-size: 0.85rem;
  margin: 0;
  color: var(--text-muted);
  width: 100%;
  text-align: center;
}

@media (min-width: 640px) {
  .footer-copy {
    width: auto;
    text-align: left;
  }
}

/* Responsive */
@media (max-width: 860px) {
  .contact-inner {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 780px) {
  .pillars,
  .solutions-grid {
    grid-template-columns: 1fr;
  }

  .main-nav {
    position: fixed;
    top: 63px;
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    align-items: flex-start;
    padding: 20px 24px 28px;
    gap: 18px;
    transform: translateY(-140%);
    transition: transform 0.25s ease;
  }

  .main-nav.open {
    transform: translateY(0);
  }

  .nav-toggle {
    display: flex;
  }

  .nav-cta {
    padding: 10px 18px;
  }
}