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

:root {
  --bg: #0f172a;
  --bg-soft: #111827;
  --card: rgba(255, 255, 255, 0.08);
  --card-solid: #ffffff;
  --text: #e5e7eb;
  --text-dark: #1f2937;
  --muted: #cbd5e1;
  --primary: #38bdf8;
  --primary-dark: #0ea5e9;
  --border: rgba(255, 255, 255, 0.15);
  --shadow: 0 18px 40px rgba(15, 23, 42, 0.18);
  --radius: 20px;
  --container: 1120px;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.6;
  background:
    radial-gradient(circle at top left, rgba(56, 189, 248, 0.18), transparent 30%),
    linear-gradient(180deg, #0f172a 0%, #111827 25%, #f8fafc 25%, #f8fafc 100%);
  color: var(--text-dark);
}

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

a {
  text-decoration: none;
}

.container {
  width: min(92%, var(--container));
  margin: 0 auto;
}

.header {
  color: var(--text);
  padding-bottom: 4rem;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.2rem 0;
  position: sticky;
  top: 0;
  backdrop-filter: blur(14px);
  z-index: 20;
}

.logo {
  color: #ffffff;
  font-weight: 700;
  font-size: 1.05rem;
}

.menu-toggle {
  display: none;
  border: none;
  background: transparent;
  color: #ffffff;
  font-size: 1.7rem;
  cursor: pointer;
}

.nav-links {
  display: flex;
  gap: 1.2rem;
  list-style: none;
}

.nav-links a {
  color: #e2e8f0;
  font-weight: 600;
}

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

.hero {
  min-height: calc(100vh - 90px);
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: 2rem;
  padding: 3rem 0 1rem;
}

.eyebrow,
.section-label {
  text-transform: uppercase;
  letter-spacing: 0.15em;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 0.8rem;
}

.hero h1 {
  font-size: clamp(2.4rem, 5vw, 4.5rem);
  line-height: 1.1;
  margin-bottom: 1rem;
}

.hero h1 span {
  color: #ffffff;
}

.hero-description {
  color: var(--muted);
  font-size: 1.05rem;
  max-width: 560px;
  margin-bottom: 1.5rem;
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.btn {
  display: inline-block;
  padding: 0.9rem 1.3rem;
  border-radius: 999px;
  font-weight: 700;
  transition: transform 0.2s ease, background 0.2s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: var(--primary);
  color: #082f49;
}

.btn-primary:hover {
  background: var(--primary-dark);
  color: #ffffff;
}

.btn-secondary {
  background: transparent;
  color: #ffffff;
  border: 1px solid var(--border);
}

.hero-card {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.profile-placeholder {
  aspect-ratio: 4 / 3;
  background: linear-gradient(135deg, rgba(56, 189, 248, 0.25), rgba(255, 255, 255, 0.08));
}

.profile-placeholder img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-card-content {
  padding: 1.5rem;
}

.hero-card-content h2 {
  margin-bottom: 0.7rem;
  color: #ffffff;
}

.hero-card-content p {
  color: #e2e8f0;
  margin-bottom: 0.4rem;
}

.section {
  padding: 5rem 0;
}

.section-heading {
  margin-bottom: 1.6rem;
}

.section-heading h2 {
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  color: #0f172a;
}

.about-card,
.education-card,
.contact-card,
.project-card {
  background: var(--card-solid);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.about-card,
.education-card,
.contact-card {
  padding: 2rem;
}

.about-card p,
.education-card p,
.contact-card p {
  font-size: 1.03rem;
  color: #475569;
}

.education-card h3 {
  margin-bottom: 0.7rem;
  color: #0f172a;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.4rem;
}

.project-card {
  overflow: hidden;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.project-card:hover {
  transform: translateY(-6px);
}

.project-image {
  aspect-ratio: 16 / 10;
  background: #e2e8f0;
}

.project-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.project-content {
  padding: 1.3rem;
}

.project-content h3 {
  color: #0f172a;
  margin-bottom: 0.7rem;
}

.project-content p {
  color: #475569;
}

.contact-list {
  margin-top: 1rem;
  display: grid;
  gap: 0.5rem;
}

.footer {
  background: #0f172a;
  color: #cbd5e1;
  padding: 1.2rem 0;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
}

.back-to-top {
  color: var(--primary);
  font-weight: 700;
}

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
    padding-top: 2rem;
  }

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

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 720px) {
  .menu-toggle {
    display: block;
  }

  .nav {
    align-items: flex-start;
    flex-wrap: wrap;
  }

  .nav-links {
    width: 100%;
    display: none;
    flex-direction: column;
    gap: 0.8rem;
    padding-top: 1rem;
  }

  .nav-links.show {
    display: flex;
  }

  .hero-buttons {
    flex-direction: column;
    align-items: flex-start;
  }

  .about-card,
  .education-card,
  .contact-card {
    padding: 1.3rem;
  }
}