:root {
  --bg: #0f172a;
  --bg-dark: #020617;
  --card: #1e293b;
  --card-soft: #172033;
  --border: #334155;
  --text: #e5e7eb;
  --muted: #cbd5e1;
  --muted-2: #94a3b8;
  --primary: #38bdf8;
  --success: #22c55e;
  --warning: #facc15;
  --danger: #ef4444;
  --radius: 16px;
  --max-width: 1100px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  background:
    radial-gradient(
      circle at top left,
      rgba(56, 189, 248, 0.1),
      transparent 34%
    ),
    var(--bg);
  color: var(--text);
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.6;
}
img,
video {
  max-width: 100%;
  display: block;
}
a {
  color: inherit;
}

.site-header {
  background-color: rgba(2, 6, 23, 0.94);
  border-bottom: 1px solid var(--border);
  padding: 18px 60px;
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(10px);
}
.navbar {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
}
.brand,
nav h2 {
  color: var(--primary);
  font-size: 20px;
  font-weight: 800;
  text-decoration: none;
}
.nav-links,
nav ul {
  display: flex;
  gap: 22px;
  list-style: none;
}
.nav-links a,
nav a {
  color: var(--text);
  text-decoration: none;
  font-size: 15px;
  transition: color 0.2s ease;
}
.nav-links a:hover,
nav a:hover {
  color: var(--primary);
}

.section {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 90px 60px;
}
.section-compact {
  padding-top: 42px;
  padding-bottom: 42px;
}
.hero {
  min-height: 85vh;
  display: flex;
  align-items: center;
}
.hero-content {
  max-width: 790px;
}
.project-hero {
  padding-bottom: 50px;
}

h1 {
  max-width: 900px;
  color: #fff;
  font-size: clamp(40px, 6vw, 64px);
  line-height: 1.05;
  letter-spacing: -1.5px;
  margin-bottom: 22px;
}
h2 {
  color: #fff;
  font-size: 30px;
  margin-bottom: 22px;
}
h3 {
  color: var(--primary);
  margin-bottom: 10px;
}
p {
  color: var(--muted);
}
.eyebrow,
.hero-tag {
  color: var(--primary);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 13px;
  margin-bottom: 12px;
}
.hero-description {
  max-width: 760px;
  color: var(--muted);
  font-size: 20px;
  margin-bottom: 28px;
}
.section-heading {
  margin-bottom: 10px;
}

.hero-actions,
.hero-buttons,
.contact-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 26px;
}
.button,
.hero-buttons a,
.contact-links a {
  background-color: var(--primary);
  color: var(--bg-dark);
  padding: 12px 22px;
  text-decoration: none;
  font-weight: 800;
  border-radius: 10px;
  display: inline-block;
  transition:
    transform 0.2s ease,
    background-color 0.2s ease;
}
.button:hover,
.hero-buttons a:hover,
.contact-links a:hover {
  background-color: #7dd3fc;
  transform: translateY(-2px);
}
.button-secondary,
.secondary-button {
  background-color: transparent !important;
  color: var(--primary) !important;
  border: 1px solid var(--primary);
}

.tech-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.tech-list span {
  background-color: rgba(30, 41, 59, 0.9);
  color: var(--muted);
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  font-size: 14px;
}

.card,
.about-card,
.contact-card,
.project-card,
.skill-card,
.timeline-item,
.feature-card,
.image-card,
.metric-card {
  background-color: rgba(30, 41, 59, 0.92);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.18);
}
.card,
.about-card,
.contact-card {
  padding: 30px;
  max-width: 930px;
}
.card p + p,
.about-card p + p {
  margin-top: 14px;
}

.project-grid,
.skills-grid,
.feature-grid,
.project-summary-grid {
  display: grid;
  gap: 25px;
}
.project-grid {
  grid-template-columns: repeat(3, 1fr);
}
.skills-grid,
.feature-grid {
  grid-template-columns: repeat(2, 1fr);
}
.project-summary-grid {
  grid-template-columns: repeat(4, 1fr);
}
.project-card,
.skill-card,
.timeline-item,
.feature-card,
.metric-card {
  padding: 25px;
}
.project-card.featured {
  border-color: rgba(56, 189, 248, 0.75);
}
.project-card p {
  margin-bottom: 18px;
}
.project-card span {
  color: var(--muted-2);
  font-size: 14px;
}
.project-status {
  color: var(--warning);
  font-size: 14px;
  font-weight: 800;
  margin-bottom: 10px;
}
.project-status.completed {
  color: var(--success);
}
.project-link {
  display: inline-block;
  margin-top: 20px;
  color: var(--primary);
  text-decoration: none;
  font-weight: 800;
}
.project-link:hover {
  text-decoration: underline;
}
.skill-card,
.timeline-item,
.architecture-card {
  border-left: 4px solid var(--primary);
}
.timeline {
  display: grid;
  gap: 20px;
}

.metric-card span {
  display: block;
  color: var(--muted-2);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}
.metric-card strong {
  color: #fff;
  font-size: 18px;
}
.architecture-flow {
  color: #fff;
  font-weight: 800;
  font-size: 18px;
  margin-bottom: 12px;
}

.check-list {
  list-style: none;
  display: grid;
  gap: 12px;
}
.check-list li {
  color: var(--muted);
  position: relative;
  padding-left: 28px;
}
.check-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--success);
  font-weight: 800;
}

.gallery {
  display: grid;
  gap: 26px;
  margin-top: 24px;
}
.gallery-small {
  grid-template-columns: repeat(3, 1fr);
}
.image-card {
  overflow: hidden;
}
.image-card img,
.about-card img {
  width: 100%;
  border-bottom: 1px solid var(--border);
}
.image-card figcaption {
  color: var(--muted);
  padding: 18px 22px 22px;
  font-size: 15px;
}
.media-card video {
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--bg-dark);
}
.video-caption {
  margin-top: 16px;
  color: var(--muted-2);
  font-size: 15px;
}

.back-button {
  display: inline-block;
  color: var(--primary);
  text-decoration: none;
  font-weight: 800;
  border: 1px solid var(--primary);
  padding: 12px 20px;
  border-radius: 10px;
  transition:
    background-color 0.2s ease,
    color 0.2s ease;
}
.back-button:hover {
  background-color: var(--primary);
  color: var(--bg-dark);
}

.site-footer,
footer {
  border-top: 1px solid var(--border);
  background-color: var(--bg-dark);
  text-align: center;
  padding: 24px 20px;
}
.site-footer p,
footer p {
  color: var(--muted-2);
}

@media (max-width: 950px) {
  .project-grid,
  .skills-grid,
  .feature-grid,
  .project-summary-grid,
  .gallery-small {
    grid-template-columns: 1fr;
  }
  .site-header {
    padding: 18px 24px;
  }
  .navbar {
    flex-direction: column;
    align-items: flex-start;
  }
  .nav-links,
  nav ul {
    flex-wrap: wrap;
    gap: 12px;
  }
  .section {
    padding-left: 25px;
    padding-right: 25px;
  }
  .hero-actions,
  .hero-buttons {
    flex-direction: column;
    align-items: flex-start;
  }
}
@media (max-width: 560px) {
  .section {
    padding-top: 65px;
    padding-bottom: 65px;
  }
  .section-compact {
    padding-top: 34px;
    padding-bottom: 34px;
  }
  .card,
  .about-card,
  .contact-card,
  .project-card,
  .skill-card,
  .timeline-item,
  .feature-card,
  .metric-card {
    padding: 22px;
  }
  .nav-links,
  nav ul {
    flex-direction: column;
  }
}

.project-page {
  max-width: 1100px;
  margin: 0 auto;
  padding: 90px 60px;
}

.project-page video {
  margin: 30px 0 50px;
  border-radius: 16px;
  border: 1px solid #334155;
}

.project-page h2 {
  margin-top: 45px;
}

.project-page ul {
  margin-left: 25px;
  margin-bottom: 25px;
}

.project-page li {
  color: #cbd5e1;
  margin-bottom: 8px;
}

.project-page .gallery {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 25px;
}

.project-page .gallery img {
  width: 100%;
  border-radius: 14px;
  border: 1px solid #334155;
  background: #1e293b;
}

@media (max-width: 800px) {
  .project-page {
    padding: 60px 25px;
  }

  .project-page .gallery {
    grid-template-columns: 1fr;
  }
}