:root {
  color-scheme: light;
  --bg: #ffffff;
  --surface: #f7f7f7;
  --surface-alt: #fcfcfc;
  --text: #111111;
  --muted: #5f5f5f;
  --border: rgba(17, 17, 17, 0.12);
  --accent: #111111;
  --shadow: 0 18px 70px rgba(17, 17, 17, 0.04);
}

[data-theme="dark"] {
  color-scheme: dark;
  --bg: #090909;
  --surface: #111111;
  --surface-alt: #141414;
  --text: #f5f5f5;
  --muted: #9d9d9d;
  --border: rgba(255, 255, 255, 0.1);
  --accent: #f5f5f5;
  --shadow: 0 18px 70px rgba(0, 0, 0, 0.16);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background: radial-gradient(circle at top left, rgba(0, 0, 0, 0.02), transparent 40%),
    var(--bg);
  color: var(--text);
  font-family: Inter, "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 16px;
  line-height: 1.65;
}

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

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

a:hover,
button:hover {
  opacity: 0.84;
}

button,
a.button {
  font: inherit;
}

.page-shell {
  max-width: 1150px;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 4rem;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 20;
  padding: 1rem 0;
  backdrop-filter: blur(14px);
  background: rgba(255, 255, 255, 0.82);
  border-bottom: 1px solid var(--border);
}

[data-theme="dark"] .topbar {
  background: rgba(14, 14, 14, 0.88);
}

.brand {
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  font-size: 1.1rem;
  margin-left: 25px;
}

.topbar__nav {
  display: flex;
  gap: 1.75rem;
  align-items: center;
  flex-wrap: wrap;
}

.topbar__nav a {
  color: var(--muted);
  font-size: 0.95rem;
  transition: color 0.2s ease;
}

.topbar__nav a:hover,
.topbar__nav a:focus-visible {
  color: var(--accent);
}

.theme-toggle {
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.85rem 1.1rem;
  background: transparent;
  color: var(--text);
  cursor: pointer;
}

.hero {
  padding: 3rem 0 2rem;
}

.eyebrow,
.section__eyebrow {
  margin: 0 0 0.75rem;
  color: var(--muted);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-size: 0.78rem;
}

.hero h1 {
  margin: 0;
  font-size: clamp(3rem, 6vw, 5rem);
  line-height: 0.98;
  letter-spacing: -0.05em;
}

.hero__description {
  max-width: 620px;
  margin: 1.5rem 0 2rem;
  font-size: 1.05rem;
  color: var(--muted);
}

.hero__actions {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  flex-wrap: wrap;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  border: 1px solid var(--accent);
  padding: 0.95rem 1.4rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.button--primary {
  background: var(--accent);
  color: var(--bg);
}

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

.hero__links a {
  color: var(--muted);
  font-size: 0.95rem;
}

.section {
  padding: 3rem 0;
}

.section__header {
  max-width: 780px;
}

.section__header h2 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 2.75rem);
  line-height: 1.05;
}

.content-grid,
.project-grid,
.achievement-grid,
.contact-grid {
  display: grid;
  gap: 1.5rem;
}

.content-grid {
  grid-template-columns: minmax(0, 1.6fr) minmax(240px, 1fr);
  align-items: start;
  margin-top: 2.5rem;
}

.content-grid__text p {
  max-width: 40rem;
  color: var(--muted);
}

.skills-panel {
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 1.6rem;
  background: var(--surface);
}

.skills-panel h3 {
  margin: 0 0 1rem;
  font-size: 1rem;
  letter-spacing: 0.02em;
}

.skill-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.85rem;
}

.skill-list li {
  font-size: 0.96rem;
  color: var(--text);
}

.project-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 2rem;
}

.project-card,
.achievement-card {
  border: 1px solid var(--border);
  border-radius: 22px;
  padding: 1.75rem;
  background: var(--surface);
}

.project-card__meta {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.9rem;
  color: var(--muted);
  margin-bottom: 1rem;
}

.project-card h3,
.achievement-card h3 {
  margin: 0 0 0.95rem;
  font-size: 1.15rem;
}

.project-card p,
.achievement-card p {
  margin: 0 0 1.25rem;
  color: var(--muted);
}

.project-card__tags{
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.project-card__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  padding-top: 30px;
}

.project-card__tags span {
  padding: 0.45rem 0.8rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 0.85rem;
  color: var(--text);
}

.project-card__links a {
  font-size: 0.95rem;
  border-bottom: 1px solid transparent;
}

.project-card__links a:hover {
  border-color: currentColor;
}

.timeline {
  position: relative;
  padding-left: 1rem;
  margin-top: 2rem;
}

.timeline::before {
  content: "";
  position: absolute;
  top: 0;
  left: 10px;
  bottom: 0;
  width: 1px;
  background: var(--border);
}

.timeline__item {
  position: relative;
  padding: 1.1rem 0 1.6rem 2rem;
}

.timeline__item:last-child {
  padding-bottom: 0;
}

.timeline__marker {
  position: absolute;
  left: -0.8rem;
  top: 1.2rem;
  width: 0.65rem;
  height: 0.65rem;
  border-radius: 50%;
  background: var(--bg);
  border: 1px solid var(--accent);
}

.timeline__period {
  margin: 0 0 0.5rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.timeline__company {
  margin: 0.35rem 0 1rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.achievement-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 2rem;
}

.contact-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 2rem;
}

.contact-label {
  margin: 0 0 0.5rem;
  color: var(--muted);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
}

.contact-grid a {
  display: inline-block;
  color: var(--accent);
  font-weight: 600;
}

.footer {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.95rem;
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.75s ease, transform 0.75s ease;
}

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

@media (max-width: 860px) {
  .content-grid,
  .project-grid,
  .achievement-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .topbar {
    flex-wrap: wrap;
    gap: 0.75rem;
  }

  .topbar__nav {
    justify-content: center;
    width: 100%;
  }
}

@media (max-width: 620px) {
  .page-shell {
    padding: 1rem 0.9rem 3rem;
  }

  .hero {
    padding-top: 2rem;
  }

  .hero__description {
    margin-bottom: 1.5rem;
  }

  .project-card,
  .achievement-card {
    padding: 1.4rem;
  }

  .theme-toggle {
    width: 100%;
    justify-content: center;
  }
}