html, body {
  height: 100%;
}

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

:root {
  --bg: #0f172a;
  --bg-alt: #111827;
  --panel: #1e293b;
  --panel-soft: #243449;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --accent: #38bdf8;
  --accent-strong: #0ea5e9;
  --border: #334155;
  --white: #ffffff;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
  --radius: 16px;
  --radius-sm: 10px;
  --max-width: 1100px;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: Arial, sans-serif;
  background:
    radial-gradient(circle at top left, rgba(56, 189, 248, 0.08), transparent 30%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-alt) 100%);
  color: var(--text);
  line-height: 1.6;
}

main {
  flex: 1;
}

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

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

a:hover {
  color: var(--white);
}

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

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(15, 23, 42, 0.88);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 72px;
}

.logo {
  color: var(--white);
  text-decoration: none;
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.main-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.5rem;
}

.main-nav a {
  color: var(--muted);
  text-decoration: none;
  padding: 0.55rem 0.85rem;
  border-radius: 999px;
  transition: background-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.main-nav a:hover,
.main-nav a.active {
  color: var(--white);
  background: rgba(56, 189, 248, 0.14);
}

/* Hero */
.hero {
  padding: 5rem 0 3rem;
}

.hero-inner {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 2rem;
  align-items: center;
  background: linear-gradient(180deg, rgba(30, 41, 59, 0.95), rgba(17, 24, 39, 0.95));
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 2rem;
  box-shadow: var(--shadow);
}

.profile-image {
  width: 180px;
  height: 180px;
  border-radius: 50%;
  object-fit: cover;
  border: 4px solid rgba(255, 255, 255, 0.12);
}

.hero-text h1 {
  margin: 0 0 0.5rem;
  font-size: clamp(2rem, 4vw, 3.4rem);
  line-height: 1.1;
  color: var(--white);
}

.hero-text p {
  margin: 0 0 1rem;
  max-width: 700px;
  color: var(--muted);
  font-size: 1.05rem;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1rem;
}

.hero-badge {
  padding: 0.55rem 0.85rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.03);
  color: var(--text);
  font-size: 0.95rem;
}

/* Sections */
.section {
  padding: 2rem 0;
}

.section-title {
  margin: 0 0 1.25rem;
  font-size: 1.9rem;
  color: var(--white);
}

.section-intro {
  margin: 0 0 1.5rem;
  max-width: 760px;
  color: var(--muted);
}

/* Cards / panels */
.card {
  background: linear-gradient(180deg, rgba(30, 41, 59, 0.95), rgba(20, 29, 44, 0.95));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: var(--shadow);
}

.grid {
  display: grid;
  gap: 1.25rem;
}

.grid-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

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

/* Timeline / experience */
.timeline {
  display: grid;
  gap: 1rem;
}

.timeline-item {
  background: rgba(30, 41, 59, 0.92);
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent-strong);
  border-radius: var(--radius-sm);
  padding: 1rem 1rem 1rem 1.1rem;
}

.timeline-item h3 {
  margin: 0 0 0.2rem;
  color: var(--white);
  font-size: 1.15rem;
}

.timeline-meta {
  margin-bottom: 0.6rem;
  color: var(--accent);
  font-weight: 600;
  font-size: 0.95rem;
}

.timeline-item p {
  margin: 0;
  color: var(--muted);
}

/* Skill cards */
.skill-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.skill-item {
  background: rgba(30, 41, 59, 0.92);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1rem;
}

.skill-item h3 {
  margin: 0 0 0.35rem;
  color: var(--white);
  font-size: 1.05rem;
}

.skill-item p {
  margin: 0;
  color: var(--muted);
  font-size: 0.96rem;
}

/* Badges */
.badge-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.badge-card {
  background: rgba(30, 41, 59, 0.92);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1rem;
  text-align: center;
}

.badge-card h3 {
  margin: 0.75rem 0 0.35rem;
  font-size: 1rem;
  color: var(--white);
}

.badge-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

/* Contact */
.contact-list {
  display: grid;
  gap: 0.85rem;
}

.contact-list a,
.contact-list span {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text);
}

/* Footer */
.site-footer {
  margin-top: 3rem;
  background: rgba(15, 23, 42, 0.95);
  border-top: 1px solid var(--border);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 72px;
  color: var(--muted);
  font-size: 0.95rem;
}

/* Utilities */
.text-muted {
  color: var(--muted);
}

.text-center {
  text-align: center;
}

.hidden {
  display: none;
}

/* Responsive */
@media (max-width: 900px) {
  .hero-inner,
  .grid-2,
  .grid-3,
  .badge-grid {
    grid-template-columns: 1fr;
  }

  .skill-list {
    grid-template-columns: 1fr;
  }

  .hero-inner {
    text-align: center;
  }

  .profile-image {
    margin: 0 auto;
  }

  .hero-meta {
    justify-content: center;
  }

  .footer-inner {
    flex-direction: column;
    justify-content: center;
    text-align: center;
    padding: 1rem 0;
  }
}

@media (max-width: 700px) {
  .header-inner {
    padding: 0.85rem 0;
    align-items: flex-start;
    flex-direction: column;
  }

  .main-nav {
    width: 100%;
    justify-content: flex-start;
  }

  .hero {
    padding-top: 3rem;
  }

  .hero-inner {
    padding: 1.25rem;
  }

  .section-title {
    font-size: 1.55rem;
  }
}