:root {
  --background: #f8f9fa;
  --surface: #f8f9fa;
  --surface-rgb: 248, 249, 250;
  --surface-container-low: #eef2f7;
  --surface-container-lowest: #ffffff;
  --surface-container-high: #dde5f0;
  --surface-variant: #e5ebf3;
  --primary: #000000;
  --primary-container: #101b30;
  --secondary: #47607e;
  --secondary-fixed-dim: #5d7694;
  --tertiary: #000000;
  --on-surface: #0f1728;
  --on-surface-soft: #4f5f76;
  --on-primary-container: #dbe7ff;
  --outline-variant: rgba(71, 96, 126, 0.16);
  --ghost-border: rgba(71, 96, 126, 0.15);
  --ambient-shadow: 0 32px 60px rgba(15, 23, 40, 0.06);
  --radius-lg: 1.5rem;
  --radius-md: 1rem;
  --radius-sm: 0.75rem;
  --space-edge: clamp(1.4rem, 4vw, 3.5rem);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Manrope", sans-serif;
  color: var(--on-surface);
  background:
    radial-gradient(circle at 12% 10%, rgba(16, 27, 48, 0.18) 0%, transparent 28%),
    radial-gradient(circle at 88% 16%, rgba(71, 96, 126, 0.16) 0%, transparent 24%),
    linear-gradient(180deg, #f6f8fb 0%, #eef3f8 48%, #f8f9fa 100%);
  line-height: 1.7;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.1;
  font-family: "Plus Jakarta Sans", sans-serif;
  letter-spacing: -0.03em;
}

p {
  margin: 0;
}

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

.ambient {
  position: fixed;
  inset: -14rem auto auto -12rem;
  width: 32rem;
  height: 32rem;
  background: radial-gradient(circle, rgba(16, 27, 48, 0.18), transparent 66%);
  filter: blur(20px);
  pointer-events: none;
  z-index: -1;
  animation: float 12s ease-in-out infinite alternate;
}

.site-header {
  width: min(1100px, calc(100% - 2.5rem));
  margin: 1.2rem auto 0;
  padding: 0.9rem 1.15rem;
  border-radius: 999px;
  background: rgba(var(--surface-rgb), 0.7);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 18px 50px rgba(15, 23, 40, 0.05);
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 1rem;
  z-index: 10;
}

.logo {
  font-family: "Plus Jakarta Sans", sans-serif;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--primary-container);
  font-size: 0.92rem;
}

.nav {
  display: flex;
  gap: 1.25rem;
}

.nav a {
  font-size: 0.94rem;
  color: var(--on-surface-soft);
  transition: color 180ms ease;
}

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

main {
  width: min(1100px, calc(100% - 2.5rem));
  margin: 2.6rem auto 4rem;
  display: grid;
  gap: 7rem;
}

.hero,
.section,
.site-footer {
  padding-inline: var(--space-edge);
}

.hero {
  max-width: 860px;
  display: grid;
  gap: 1.25rem;
  padding-top: 2rem;
}

.eyebrow {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--secondary);
  font-weight: 700;
}

.hero h1 {
  font-size: clamp(2.75rem, 7vw, 5.25rem);
  max-width: 11ch;
}

.hero-text {
  max-width: 62ch;
  color: var(--on-surface-soft);
  font-size: 1rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin-top: 0.4rem;
}

.button {
  padding: 0.82rem 1.35rem;
  border-radius: 999px;
  border: 1px solid var(--ghost-border);
  font-size: 0.95rem;
  font-weight: 700;
  transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease, border-color 180ms ease;
}

.button:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 34px rgba(15, 23, 40, 0.06);
}

.button-primary {
  color: var(--on-primary-container);
  border-color: transparent;
  background: linear-gradient(135deg, var(--primary-container), var(--secondary-fixed-dim));
  box-shadow: 0 24px 52px rgba(16, 27, 48, 0.14);
}

.button-primary:hover {
  background: linear-gradient(135deg, #1a2946, #6d87a7);
}

.button-ghost {
  background: rgba(var(--surface-rgb), 0.58);
  color: var(--primary-container);
}

.section {
  display: grid;
  gap: 1.6rem;
  padding-top: 3.5rem;
  padding-bottom: 3.5rem;
  border-radius: calc(var(--radius-lg) + 0.5rem);
}

#projects {
  background: linear-gradient(180deg, var(--surface-container-low) 0%, #edf2f8 100%);
}

#about {
  background: linear-gradient(180deg, #f8f9fa 0%, #edf2f7 100%);
}

#contact {
  background: linear-gradient(180deg, var(--primary-container) 0%, #162743 100%);
  color: #edf4ff;
}

#contact .eyebrow,
#contact p,
#contact .section-heading h2 {
  color: inherit;
}

#contact p {
  color: rgba(237, 244, 255, 0.82);
}

.section-heading {
  display: grid;
  gap: 0.35rem;
}

.section h2 {
  font-size: clamp(1.75rem, 4vw, 2.6rem);
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 1rem;
  align-items: stretch;
}

.project-card {
  background: var(--surface-container-lowest);
  border-radius: var(--radius-lg);
  padding: 1rem;
  display: grid;
  gap: 0.9rem;
  box-shadow: var(--ambient-shadow);
  transition: transform 180ms ease, box-shadow 180ms ease;
  min-width: 0;
  overflow: hidden;
  align-content: start;
}

.project-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 38px 64px rgba(15, 23, 40, 0.08);
}

.project-tag {
  width: fit-content;
  color: var(--secondary);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-weight: 800;
  padding: 0.3rem 0.65rem;
  border-radius: var(--radius-sm);
  background: var(--surface-variant);
}

.project-card h3 {
  font-size: 1rem;
}

.project-preview {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 10;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: linear-gradient(180deg, #d9e2ee 0%, #eef3f9 100%);
}

.project-preview img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
  display: block;
}

.project-card p {
  color: var(--on-surface-soft);
  font-size: 0.88rem;
  line-height: 1.6;
}

.project-card h3 a {
  color: var(--primary-container);
  font-weight: 700;
}

.featured-video {
  width: 100%;
  margin-top: 0.75rem;
  padding: 1.4rem;
  border-radius: calc(var(--radius-lg) + 0.25rem);
  background: rgba(var(--surface-rgb), 0.72);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: var(--ambient-shadow);
  display: grid;
  gap: 1rem;
}

.featured-video-head {
  display: grid;
  gap: 0.45rem;
}

.featured-video-head h3 {
  font-size: 1.2rem;
}

.featured-video-head p {
  color: var(--on-surface-soft);
}

.video-shell {
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: #09101d;
}

.video-shell iframe {
  width: 100%;
  height: 100%;
  border: 0;
}

.video-hint {
  font-size: 0.9rem;
  color: var(--on-surface-soft);
}

.about-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 1rem;
}

.skills {
  background: var(--surface-container-high);
  border-radius: calc(var(--radius-lg) + 0.15rem);
  padding: 1.3rem;
  display: grid;
  gap: 0.55rem;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.5);
}

.skills h3 {
  font-size: 1rem;
  color: var(--primary-container);
}

.skills p {
  color: var(--on-surface-soft);
}

.contact p {
  max-width: 68ch;
}

.contact-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
}

.contact-links a {
  padding: 0.72rem 1rem;
  border-radius: var(--radius-md);
  border: 1px solid rgba(237, 244, 255, 0.16);
  background: rgba(248, 249, 250, 0.08);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: background-color 180ms ease, border-color 180ms ease, transform 180ms ease;
}

.contact-links a:hover {
  background-color: rgba(248, 249, 250, 0.14);
  border-color: rgba(237, 244, 255, 0.24);
  transform: translateY(-2px);
}

.site-footer {
  width: min(1100px, calc(100% - 2.5rem));
  margin: 0 auto 2rem;
  color: var(--on-surface-soft);
  font-size: 0.92rem;
}

.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 450ms ease, transform 450ms ease;
}

.reveal.in-view {
  opacity: 1;
  transform: translateY(0);
}

@keyframes float {
  from {
    transform: translate(0, 0);
  }
  to {
    transform: translate(56px, 34px);
  }
}

@media (max-width: 980px) {
  .project-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .project-preview {
    height: 180px;
  }

  .about-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 680px) {
  .site-header {
    width: calc(100% - 1.4rem);
    top: 0.7rem;
    margin-top: 0.7rem;
    border-radius: 1rem;
    padding: 0.8rem 0.85rem;
  }

  .nav {
    gap: 0.8rem;
  }

  .nav a {
    font-size: 0.86rem;
  }

  main,
  .site-footer {
    width: calc(100% - 1.4rem);
  }

  main {
    gap: 4.5rem;
  }

  .hero,
  .section,
  .site-footer {
    padding-inline: 1.2rem;
  }

  .section {
    padding-top: 2rem;
    padding-bottom: 2rem;
  }

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

  .project-preview {
    height: 210px;
  }
}