:root {
  --bg: #f5f7fb;
  --surface: #eef2f7;
  --primary: #0f172a;
  --secondary: #1e293b;
  --accent: #3b82f6;
  --text: #f8fafc;
  --muted: #cbd5e1;
  --border: rgba(255, 255, 255, 0.16);
  --success: #10b981;
  --shadow: 0 20px 45px rgba(15, 23, 42, 0.08);
  --radius: 24px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Poppins', sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 20% 20%, rgba(129, 140, 248, 0.42), transparent 24%),
    radial-gradient(circle at 80% 10%, rgba(59, 130, 246, 0.34), transparent 20%),
    radial-gradient(circle at 50% 80%, rgba(14, 165, 233, 0.28), transparent 24%),
    linear-gradient(135deg, #07111f 0%, #0f172a 40%, #111827 100%);
  line-height: 1.7;
}

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

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

.container {
  width: min(1120px, calc(100% - 2rem));
  margin: 0 auto;
}

.section {
  padding: 6rem 0;
}

.section-alt {
  background:
    radial-gradient(circle at 10% 20%, rgba(59, 130, 246, 0.16), transparent 22%),
    radial-gradient(circle at 90% 80%, rgba(129, 140, 248, 0.16), transparent 24%),
    rgba(15, 23, 42, 0.92);
}

.scroll-progress {
  position: fixed;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), #60a5fa);
  transform-origin: left;
  transform: scaleX(0);
  z-index: 1000;
}

.site-header {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 999;
  transition: background 0.3s ease, box-shadow 0.3s ease;
}

.site-header.scrolled {
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.08);
  backdrop-filter: blur(14px);
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 74px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: white;
  font-size: 0.9rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.4rem;
  color: var(--muted);
}

.nav-links a {
  position: relative;
  transition: color 0.2s ease;
}

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

.nav-toggle {
  display: none;
  background: none;
  border: 0;
  cursor: pointer;
  padding: 0.3rem;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--primary);
  margin: 4px 0;
  transition: transform 0.2s ease;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.35rem;
  border-radius: 999px;
  font-weight: 600;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

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

.btn-primary {
  background: var(--primary);
  color: white;
  box-shadow: 0 12px 24px rgba(15, 23, 42, 0.12);
}

.btn-secondary {
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.95);
  color: var(--primary);
}

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 7rem;
  background:
    radial-gradient(circle at 15% 20%, rgba(59, 130, 246, 0.25), transparent 18%),
    radial-gradient(circle at 80% 10%, rgba(129, 140, 248, 0.22), transparent 20%),
    radial-gradient(circle at 50% 80%, rgba(56, 189, 248, 0.2), transparent 24%),
    linear-gradient(120deg, rgba(7, 17, 31, 0.96), rgba(15, 23, 42, 0.96));
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle, rgba(255,255,255,0.85) 1px, transparent 1px),
    radial-gradient(circle, rgba(255,255,255,0.45) 1px, transparent 1px);
  background-size: 120px 120px, 220px 220px;
  background-position: 0 0, 40px 80px;
  opacity: 0.25;
  pointer-events: none;
}

.hero-grid,
.about-grid,
.contact-grid,
.footer-grid {
  display: grid;
  gap: 2.5rem;
}

.hero-grid {
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
}

.eyebrow,
.section-tag {
  color: var(--accent);
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-size: 0.8rem;
  margin-bottom: 0.8rem;
}

.hero h1 {
  font-size: clamp(2.4rem, 4vw, 3.4rem);
  line-height: 1.08;
  margin-bottom: 1rem;
  letter-spacing: -0.03em;
}

.role-row {
  display: flex;
  gap: 0.6rem;
  font-size: clamp(1.1rem, 2vw, 1.4rem);
  font-weight: 600;
  color: var(--secondary);
  margin-bottom: 1rem;
}

.role {
  color: var(--accent);
}

.hero-description {
  max-width: 620px;
  font-size: 1.02rem;
  color: var(--muted);
  margin-bottom: 1.6rem;
}

.hero-actions,
.resume-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1.8rem;
}

.social-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
}

.social-links a {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1px solid var(--border);
  color: var(--secondary);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.social-links a:hover {
  transform: translateY(-2px);
  border-color: var(--accent);
  color: var(--accent);
}

.hero-visual img,
.about-visual img {
  border-radius: 32px;
  box-shadow: var(--shadow);
}

.about-grid {
  grid-template-columns: 0.85fr 1.15fr;
  align-items: center;
}

.about-content h2,
.section-heading h2,
.contact-info h2,
.resume-card h2 {
  font-size: clamp(1.8rem, 3vw, 2.5rem);
  line-height: 1.2;
  margin-bottom: 1rem;
}

.about-content p,
.section-heading p,
.contact-info p,
.resume-card p,
.project-body p,
.achievement-card p,
.skill-card ul,
.contact-form label span,
.footer-grid p {
  color: var(--muted);
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 1.4rem;
}

.info-grid article,
.card,
.resume-card,
.contact-form {
  background: rgba(15, 23, 42, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius);
  box-shadow: 0 20px 45px rgba(2, 6, 23, 0.35);
}

.info-grid article,
.card,
.resume-card {
  padding: 1.2rem;
}

.info-grid h3,
.skill-card h3,
.achievement-card h3,
.project-body h3 {
  font-size: 1rem;
  margin-bottom: 0.4rem;
}

.section-heading {
  max-width: 720px;
  margin-bottom: 2rem;
}

.skill-grid,
.achievement-grid,
.project-grid {
  display: grid;
  gap: 1.4rem;
}

.skill-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.achievement-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.project-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.card {
  padding: 1.3rem;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 24px 50px rgba(15, 23, 42, 0.1);
}

.skill-card ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 0.8rem;
}

.skill-card li,
.tags span {
  display: inline-flex;
  padding: 0.4rem 0.7rem;
  background: var(--surface);
  color: var(--secondary);
  border-radius: 999px;
  font-size: 0.9rem;
}

.achievement-card span {
  display: inline-block;
  margin-top: 1rem;
  font-weight: 600;
  color: var(--accent);
}

.project-card {
  overflow: hidden;
  padding: 0;
}

.project-card img {
  width: 100%;
  height: 220px;
  object-fit: cover;
}

.project-body {
  padding: 1.2rem 1.2rem 1.4rem;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin: 0.9rem 0 1rem;
}

.project-links {
  display: flex;
  gap: 0.8rem;
}

.project-links a {
  color: var(--accent);
  font-weight: 600;
}

.resume-card {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 2rem;
  padding: 2rem;
}

.contact-grid {
  grid-template-columns: 0.9fr 1.1fr;
}

.contact-info ul {
  list-style: none;
  margin-top: 1rem;
  display: grid;
  gap: 0.7rem;
}

.contact-form {
  padding: 1.4rem;
  display: grid;
  gap: 1rem;
}

.contact-form label {
  display: grid;
  gap: 0.45rem;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 0.9rem 1rem;
  font: inherit;
  color: var(--text);
  background: var(--surface);
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: 2px solid rgba(59, 130, 246, 0.15);
  border-color: var(--accent);
}

.form-message {
  min-height: 1.2rem;
  color: var(--success);
  font-weight: 600;
}

.site-footer {
  background:
    radial-gradient(circle at 20% 20%, rgba(59, 130, 246, 0.16), transparent 18%),
    radial-gradient(circle at 80% 80%, rgba(129, 140, 248, 0.18), transparent 20%),
    var(--primary);
  color: rgba(255, 255, 255, 0.9);
  padding: 3rem 0 5rem;
  position: relative;
}

.footer-grid {
  grid-template-columns: 1fr auto;
  align-items: center;
}

.footer-links {
  display: flex;
  gap: 1rem;
}

.back-to-top {
  position: absolute;
  right: 2rem;
  bottom: 2rem;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: white;
  color: var(--primary);
  display: grid;
  place-items: center;
  box-shadow: var(--shadow);
}