:root,
:root[data-theme="dark"] {
  --bg: #0a0a0a;
  --sheet-bg: #0f0f0f;
  --text: #fafafa;
  --muted: #a3a3a3;
  --border: #262626;
  --border-soft: rgba(255, 255, 255, 0.055);
  --hover-bg: #171717;
  --sheet-shadow: 0 0 40px -14px rgba(255, 255, 255, 0.12);
  --font-family: "Wanted Sans Variable", "Wanted Sans", -apple-system, "system-ui", system-ui, sans-serif;
}

:root[data-theme="light"] {
  --bg: #ffffff;
  --sheet-bg: #ffffff;
  --text: #171717;
  --muted: #525252;
  --border: #e5e5e5;
  --border-soft: rgba(10, 10, 10, 0.04);
  --hover-bg: #fafafa;
  --sheet-shadow: 0 0 40px -12px rgba(0, 0, 0, 0.12);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
  font-weight: 400;
  line-height: 24px;
  -webkit-font-smoothing: antialiased;
  overscroll-behavior: none;
  transition: background-color 0.2s ease, color 0.2s ease;
}

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

ul {
  list-style: none;
}

.container {
  max-width: 768px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Reveal-on-scroll */
[data-reveal] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s, transform 0.6s;
}

[data-reveal].revealed {
  opacity: 1;
  transform: translateY(0);
}

/* Hero: pinned behind the sheet while scrolling */
.hero {
  position: sticky;
  top: 0;
  z-index: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--bg);
  transition: background-color 0.2s ease;
}

.hero h1 {
  font-size: 60px;
  font-weight: 700;
  line-height: 60px;
  text-align: center;
}

.hero-tagline {
  margin-top: 24px;
  font-size: 36px;
  font-weight: 500;
  line-height: 40px;
  text-align: center;
}

.hero-sub {
  margin-top: 16px;
  font-size: 20px;
  font-weight: 400;
  line-height: 28px;
  color: var(--muted);
  text-align: center;
}

.hero-links {
  margin-top: 32px;
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

.hero-links a {
  font-size: 16px;
  line-height: 24px;
  padding: 10px 20px;
  border: 1px solid var(--border);
  border-radius: 8px;
  transition: background-color 0.15s ease;
}

.hero-links a:hover {
  background: var(--hover-bg);
}

.theme-toggle {
  font-size: 16px;
  line-height: 24px;
  width: 44px;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: transparent;
  color: var(--text);
  cursor: pointer;
  font-family: inherit;
  transition: background-color 0.15s ease;
}

.theme-toggle:hover {
  background: var(--hover-bg);
}

.theme-toggle .icon-moon {
  display: none;
}

:root[data-theme="light"] .theme-toggle .icon-sun {
  display: none;
}

:root[data-theme="light"] .theme-toggle .icon-moon {
  display: block;
}

/* Sheet: rounded card that scrolls over the pinned hero */
.sheet {
  position: relative;
  z-index: 10;
  margin: 0 18px;
  padding-bottom: 18px;
  background: var(--sheet-bg);
  border: 1px solid var(--border-soft);
  border-radius: 32px 32px 0 0;
  box-shadow: var(--sheet-shadow);
  transition: background-color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

@media (min-width: 640px) {
  .sheet {
    margin: 0 36px;
    padding-bottom: 36px;
  }
}

@media (min-width: 1024px) {
  .sheet {
    margin: 0 60px;
    padding-bottom: 60px;
  }
}

.sheet section,
.sheet footer {
  padding: 96px 0;
}

/* Section headings shared */
.sheet h2 {
  font-size: 24px;
  font-weight: 600;
  line-height: 32px;
  margin-bottom: 24px;
}

/* Feature blocks */
.features-wrap {
  display: flex;
  flex-direction: column;
  gap: 48px;
}

.feature-title {
  font-size: 18px;
  font-weight: 600;
  line-height: 28px;
}

.feature-desc {
  margin-top: 4px;
  font-size: 18px;
  font-weight: 400;
  line-height: 28px;
  color: var(--muted);
}

/* Experience */
.exp-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.exp-name {
  display: block;
  font-size: 24px;
  font-weight: 600;
  line-height: 32px;
}

.exp-meta {
  display: block;
  font-size: 18px;
  font-weight: 400;
  line-height: 28px;
  color: var(--muted);
}

/* Selected work */
.work-note {
  margin-top: -12px;
  margin-bottom: 24px;
  font-size: 16px;
  line-height: 24px;
  color: var(--muted);
}

.work-note a {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.work-note a:hover {
  color: var(--text);
}

.project-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.project {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 24px;
}

.project-head {
  display: flex;
  align-items: center;
  gap: 12px;
}

.project-icon {
  width: 32px;
  height: 32px;
  border-radius: 6px;
  display: block;
}

.project h3 {
  font-size: 24px;
  font-weight: 600;
  line-height: 32px;
}

.project-meta {
  margin-top: 16px;
  font-size: 18px;
  font-weight: 400;
  line-height: 28px;
  color: var(--muted);
}

.project-desc {
  margin-top: 16px;
  font-size: 18px;
  font-weight: 400;
  line-height: 28px;
}

.project-bullets {
  margin-top: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.project-bullets li {
  font-size: 18px;
  font-weight: 400;
  line-height: 28px;
  color: var(--muted);
  padding-left: 20px;
  position: relative;
}

.project-bullets li::before {
  content: "·";
  position: absolute;
  left: 4px;
}

.project-bullets strong {
  font-weight: 500;
  color: var(--text);
}

/* Resume CTA */
.resume-cta p {
  font-size: 18px;
  line-height: 28px;
  color: var(--muted);
}

.resume-links {
  margin-top: 24px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.resume-links a {
  font-size: 16px;
  line-height: 24px;
  padding: 10px 20px;
  border: 1px solid var(--border);
  border-radius: 8px;
  transition: background-color 0.15s ease;
}

.resume-links a:hover {
  background: var(--hover-bg);
}

/* Closing */
.closing-text {
  font-size: 18px;
  font-weight: 400;
  line-height: 28px;
  color: var(--muted);
}

/* Contact */
.contact .container {
  text-align: center;
}

.contact-email {
  display: inline-block;
  margin-top: 16px;
  font-size: 20px;
  font-weight: 400;
  line-height: 28px;
  text-decoration: underline;
  text-underline-offset: 4px;
  transition: color 0.15s ease;
}

.contact-email:hover {
  color: var(--muted);
}

/* Responsive */
@media (max-width: 640px) {
  .hero h1 {
    font-size: 40px;
    line-height: 44px;
  }

  .hero-tagline {
    font-size: 26px;
    line-height: 32px;
  }

  .hero-sub {
    font-size: 17px;
    line-height: 26px;
  }

  .sheet section,
  .sheet footer {
    padding: 64px 0;
  }

  .project h3,
  .exp-name {
    font-size: 20px;
    line-height: 28px;
  }
}