:root {
  --bg-page: #0b1120;
  --bg-card: #111d32;
  --border-card: #1e2d4a;
  --gold: #c9a84c;
  --text-heading: #ffffff;
  --text-body: #a0b0c8;
  --text-secondary: #8a9bb8;
  --font-heading: 'Oswald', sans-serif;
  --font-body: 'Lato', sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--bg-page);
  color: var(--text-body);
  line-height: 1.7;
}

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  color: var(--text-heading);
  text-transform: uppercase;
  letter-spacing: 1px;
}

a { color: var(--gold); text-decoration: none; }

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

.container { max-width: 1100px; margin: 0 auto; padding: 0 24px; }

/* ── Navigation ── */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: transparent;
  transition: background 0.3s;
}

.nav__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 70px;
}

.nav__logo {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  color: var(--gold);
  text-decoration: none;
  text-transform: none;
  letter-spacing: 0;
}

.nav__links {
  display: flex;
  gap: 32px;
  list-style: none;
}

.nav__links a {
  color: var(--text-body);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.3s;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-family: var(--font-body);
}

.nav__links a:hover {
  color: var(--gold);
}

.nav__toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.nav__hamburger,
.nav__hamburger::before,
.nav__hamburger::after {
  width: 24px;
  height: 2px;
  background: var(--text-body);
  display: block;
  position: relative;
  transition: all 0.3s;
}

.nav__hamburger::before {
  content: '';
  top: -7px;
}

.nav__hamburger::after {
  content: '';
  top: 7px;
}

@media (max-width: 768px) {
  .nav__toggle {
    display: block;
  }

  .nav__links {
    position: fixed;
    top: 0;
    right: -280px;
    width: 280px;
    height: 100vh;
    background: var(--bg-page);
    flex-direction: column;
    padding: 80px 32px 32px;
    gap: 24px;
    transition: right 0.3s;
    box-shadow: -4px 0 24px rgba(0, 0, 0, 0.5);
  }

  .nav--open .nav__links {
    right: 0;
  }

  .nav--open .nav__hamburger {
    background: transparent;
  }

  .nav--open .nav__hamburger::before {
    transform: rotate(45deg);
    top: 0;
  }

  .nav--open .nav__hamburger::after {
    transform: rotate(-45deg);
    top: 0;
  }
}

/* ── Hero ── */

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, #0b1120, #111d32);
}

.hero__inner {
  display: flex;
  align-items: center;
  gap: 48px;
}

.hero__text {
  flex: 1;
}

.hero__name {
  font-size: clamp(2.5rem, 5vw, 4rem);
  margin-bottom: 8px;
  line-height: 1.1;
}

.hero__tagline {
  color: var(--gold);
  font-family: var(--font-heading);
  font-size: 1.1rem;
  letter-spacing: 2px;
  text-transform: uppercase;
}

.hero__description {
  margin-top: 16px;
  font-size: 1.1rem;
  max-width: 500px;
  line-height: 1.7;
}

.hero__buttons {
  margin-top: 32px;
  display: flex;
  gap: 16px;
}

.btn {
  display: inline-block;
  padding: 12px 32px;
  border-radius: 4px;
  font-family: var(--font-heading);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  transition: all 0.3s;
  text-decoration: none;
  cursor: pointer;
  border: none;
}

.btn--primary {
  background: var(--gold);
  color: #0b1120;
}

.btn--primary:hover {
  filter: brightness(1.1);
}

.btn--outline {
  border: 1px solid var(--gold);
  color: var(--gold);
  background: transparent;
}

.btn--outline:hover {
  background: rgba(201, 168, 76, 0.1);
}

.hero__graphic {
  flex: 1;
  min-height: 300px;
  background:
    radial-gradient(circle at 70% 30%, rgba(201,168,76,0.05) 0%, transparent 50%),
    radial-gradient(circle at 30% 70%, rgba(30,45,74,0.4) 0%, transparent 50%);
}

@media (max-width: 768px) {
  .hero__inner {
    flex-direction: column;
    text-align: center;
  }

  .hero__graphic {
    display: none;
  }

  .hero__buttons {
    justify-content: center;
  }

  .hero__description {
    margin-left: auto;
    margin-right: auto;
  }
}

/* ── About ── */

.about {
  padding: 100px 0;
}

.about__inner {
  display: flex;
  gap: 48px;
  align-items: center;
}

.about__photo-placeholder {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  border: 3px solid var(--gold);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  font-family: var(--font-body);
  background: var(--bg-card);
  flex-shrink: 0;
}

.section-heading {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  color: var(--text-heading);
  text-transform: uppercase;
  letter-spacing: 1px;
  font-weight: 700;
}

.section-heading__bar {
  width: 40px;
  height: 3px;
  background: var(--gold);
  margin: 14px 0 20px;
}

.about__socials {
  display: flex;
  gap: 12px;
  margin-top: 20px;
}

.social-link {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid var(--border-card);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: all 0.3s;
}

.social-link:hover {
  border-color: var(--gold);
  color: var(--gold);
}

@media (max-width: 768px) {
  .about__inner {
    flex-direction: column;
    text-align: center;
  }

  .about__photo-placeholder {
    margin: 0 auto;
  }

  .about__socials {
    justify-content: center;
  }
}

/* ── Projects ── */

.section-heading--centered {
  text-align: center;
}

.section-heading__bar--centered {
  margin: 14px auto 40px;
}

.projects {
  padding: 100px 0;
}

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

.card {
  display: flex;
  flex-direction: column;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-left: 3px solid var(--border-card);
  border-radius: 4px;
  padding: 28px 24px;
  text-decoration: none;
  transition: all 0.3s;
}

.card:hover {
  border-left-color: var(--gold);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.3);
}

.card__title {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  margin-bottom: 10px;
  color: var(--text-heading);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.card__description {
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--text-body);
  flex: 1;
}

.card__tech {
  font-size: 0.75rem;
  color: var(--text-secondary);
  letter-spacing: 1px;
  margin-top: 16px;
  display: block;
}

.card__link {
  font-size: 0.85rem;
  color: var(--gold);
  margin-top: 12px;
  display: block;
}

@media (max-width: 1024px) {
  .card-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .card-grid {
    grid-template-columns: 1fr;
  }
}

/* ── Research ── */

.research {
  padding: 80px 0;
}

.research-list {
  list-style: none;
  max-width: 700px;
  margin: 0 auto;
}

.research-item {
  padding: 24px 0;
  border-bottom: 1px solid var(--border-card);
}

.research-item:last-child {
  border-bottom: none;
}

.research-item__title {
  font-family: var(--font-heading);
  font-size: 1rem;
  color: var(--text-heading);
  text-transform: none;
}

.research-item__meta {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 6px;
}

.research-item__link {
  font-size: 0.85rem;
  color: var(--gold);
  margin-top: 8px;
  display: inline-block;
}

/* ── Contact ── */

.contact {
  padding: 100px 0;
  text-align: center;
}

.contact__blurb {
  max-width: 400px;
  margin: 0 auto 28px;
  font-size: 1rem;
}

.contact__btn {
  display: inline-block;
}

.contact__social {
  margin-top: 20px;
  display: flex;
  justify-content: center;
}

/* ── Footer ── */

.footer {
  padding: 32px 0;
  text-align: center;
  border-top: 1px solid var(--border-card);
}

.footer p {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* ── Animations ── */

@keyframes heroFadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero__text {
  animation: heroFadeIn 0.8s ease-out both;
}

.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

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

.nav--scrolled {
  background: rgba(11, 17, 32, 0.95);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.3);
}

/* ── Project Detail ── */

.project-detail {
  padding-top: 100px;
  padding-bottom: 80px;
}

.project-detail__back {
  display: inline-block;
  margin-bottom: 32px;
  color: var(--gold);
  font-size: 0.9rem;
  transition: opacity 0.3s;
}

.project-detail__back:hover {
  opacity: 0.8;
}

.project-detail__video-placeholder {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: 8px;
  aspect-ratio: 16 / 9;
  max-width: 800px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 40px;
}

.project-detail__title {
  font-family: var(--font-heading);
  font-size: 2.2rem;
  margin-bottom: 32px;
}

.project-detail__content h2 {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  color: var(--gold);
  margin-top: 36px;
  margin-bottom: 12px;
  text-transform: none;
}

.project-detail__content p {
  margin-bottom: 16px;
}

.project-detail__tech {
  list-style: none;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.project-detail__tech li {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  padding: 6px 16px;
  border-radius: 4px;
  font-size: 0.85rem;
  color: var(--text-body);
}

.project-detail__links {
  display: flex;
  gap: 16px;
  margin-top: 16px;
}