:root {
  --bg: #081a07;
  --card: #0b1622;
  --muted: #9aa5b1;
  --accent: #2dd43e;
  --text: #e6eef6;
  --glass: rgba(255, 255, 255, 0.03);

  --radius: 12px;
  --container: 80%;
  --gap: 20px;
  --transition: 240ms cubic-bezier(0.2, 0.9, 0.2, 1);
}

* {
  box-sizing: border-box;
}
html,
body {
  height: 100%;
}
body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI",
    Roboto, "Helvetica Neue", Arial;
  /* smoother, dark-blue gradient instead of bright green */
  background: linear-gradient(180deg, var(--bg) 100vh, #020810 100vh);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.45;
}

/* LAYOUT */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 28px;
  width: 100%;
}
/* Header */
.site-header {
  position: sticky;
  top: 0;
  backdrop-filter: blur(6px);
  z-index: 100;
  border-bottom: 1px solid rgba(255, 255, 255, 0.03);
  flex-wrap: wrap;
}
/* Header (hide certain menu items on mobile so it looks better) */
@media (max-width: 768px) {
  .desktop-only {
    display: none;
  }
}


.header-inner {
  display: flex;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  text-decoration: none;
}
.brand-name {
  font-weight: 600;
}

.nav {
  display: flex;
  gap: 16px;
}
.nav a {
  color: var(--muted);
  text-decoration: none;
  padding: 8px;
  border-radius: 8px;
  transition: var(--transition);
}
.nav a:hover {
  color: var(--text);
  background: var(--glass);
}

.btn {
  padding: 8px 12px;
  border-radius: 8px;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.04);
  color: var(--text);
  cursor: pointer;
  text-decoration: none;
  font-weight: 600;
}
.btn.primary {
  /* background: linear-gradient(90deg, var(--accent), #60fa84); */
  border: 1px solid rgba(255, 255, 255, 0.5);
  background: url("images/StarsB.jpg");
  background-position: center;
  background-size: cover;
  color: white;
}
.btn.ghost {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.5);
}

/* HERO */
.hero {
  position: relative;
  padding: 40px 0;
  /* ensure hero spans full viewport width and the background fills it */
  background-image: url("images/StarsA.jpg");
  background-repeat: no-repeat;
  background-position: center center;
  background-size: cover;
  min-height: 60vh; /* adjust as needed */
  display: flex;
  align-items: center;
}

/* keep the centered constrained content inside .hero-inner */
.hero-inner {
  display: flex;
  gap: 30px;
  align-items: center;
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 28px;
  background: transparent; /* ensure inner doesn't block background */
}
.hero-left {
  flex: 1;
}
.hero-image {
  flex: 0 0 220px;
}
.hero-image img {
  width: 100%;
  height: auto;
  border-radius: 16px;
  object-fit: cover;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

/* Responsive behavior */
@media (max-width: 900px) {
  .hero-inner {
    flex-direction: column;
    text-align: center;
  }
  .hero-image {
    max-width: 220px;
  }
}

h1 {
  font-size: 32px;
  margin: 6px 0 8px;
}
.lead {
  color: var(--muted);
  max-width: 55ch;
}
.cta-row {
  margin-top: 16px;
}
.hero-stats {
  display: flex;
  gap: 16px;
  list-style: none;
  padding: 0;
  margin: 18px 0 0;
  color: var(--muted);
}
.hero-stats li {
  font-weight: 600;
}

/* Cards and project grid */
.card {
  display: block;
  max-width: 320px;
  padding: 16px;
  border-radius: 12px;
  background: linear-gradient(
    180deg,
    rgba(255, 255, 255, 0.08),
    rgba(255, 255, 255, 0.04)
  );
  border: 1px solid rgba(255, 255, 255, 0.02);
  text-decoration: none;
  color: var(--text);
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}
.card:hover {
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
  transform: translateY(-2px);
}

.card-title {
  margin: 0 0 8px;
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text);
}
.card-description {
  margin: 0 0 12px;
  font-size: 0.95rem;
  color: var(--muted);
}
.card-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.tag {
  font-size: 0.75rem;
  padding: 4px 8px;
  background: rgba(255, 255, 255, 0.03);
  border-radius: 9px;
  color: var(--muted);
}

/* sections */
.section {
  padding: 36px 0;
}
.section-head {
  display: flex;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
}
.muted {
  color: var(--muted);
}
.grid {
  display: grid;
  gap: var(--gap);
}
.about-grid {
  grid-template-columns: 1fr 320px;
}

@media (max-width: 880px) {
  .hero-inner,
  .about-grid {
    flex-direction: column;
  }
  .hero-right {
    width: 100%;
  }
  .about-grid {
    grid-template-columns: 1fr;
  }
}

/* small */
.small {
  font-size: 13px;
}
.muted.small {
  color: var(--muted);
}

/* footer */
.site-footer {
  background-color: rgba(0, 0, 0, 0.2);
  padding: 22px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.02);
  margin-top: 36px;
}

/* modal (used by the lightweight JS modal created at runtime) */
.simple-modal {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  background: rgba(0, 0, 0, 0.6);
  z-index: 200;
}
.simple-modal .modal-card {
  background: linear-gradient(180deg, #07101a, #0b1622);
  padding: 18px;
  border-radius: 12px;
  max-width: 880px;
  width: calc(100% - 40px);
  color: var(--text);
  border: 1px solid rgba(255, 255, 255, 0.04);
}
.simple-modal .close-btn {
  margin-top: 12px;
  display: inline-block;
  padding: 8px 12px;
  border-radius: 8px;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.06);
  cursor: pointer;
  color: var(--muted);
}

/* light theme (toggle) */
:root.light {
  --bg: #f6fbff;
  --card: #ffffff;
  --muted: #0d973b;
  --accent: #0ea545;
  --text: #03111a;
  --glass: rgba(2, 6, 23, 0.02);
}