:root {
  color-scheme: light;
  --color-bg: #f8fafc;
  --background-body: radial-gradient(circle at top left, rgba(79, 70, 229, 0.18), transparent 45%),
    radial-gradient(circle at top right, rgba(20, 184, 166, 0.18), transparent 55%),
    #f8fafc;
  --color-surface: rgba(255, 255, 255, 0.88);
  --color-surface-strong: rgba(255, 255, 255, 0.94);
  --color-primary: #4f46e5;
  --color-primary-soft: rgba(99, 102, 241, 0.15);
  --color-primary-tint: rgba(79, 70, 229, 0.12);
  --color-primary-border-soft: rgba(79, 70, 229, 0.2);
  --color-primary-border-strong: rgba(79, 70, 229, 0.35);
  --color-accent: #14b8a6;
  --color-accent-hover: #0d9488;
  --color-link-underline: rgba(20, 184, 166, 0.4);
  --color-text: #0b1120;
  --color-text-muted: rgba(15, 23, 42, 0.7);
  --color-text-subtle: rgba(51, 65, 85, 0.85);
  --color-text-meta: rgba(71, 85, 105, 0.7);
  --color-text-tertiary: rgba(71, 85, 105, 0.6);
  --color-border: rgba(148, 163, 184, 0.3);
  --color-border-soft: rgba(148, 163, 184, 0.35);
  --color-border-strong: rgba(100, 116, 139, 0.55);
  --color-footer-border: rgba(148, 163, 184, 0.35);
  --color-spotlight-border: rgba(79, 70, 229, 0.2);
  --shadow-soft: 0 20px 45px rgba(15, 23, 42, 0.08);
  --shadow-lifted: 0 24px 40px rgba(15, 23, 42, 0.08);
  --shadow-strong: 0 30px 60px rgba(15, 23, 42, 0.12);
  --shadow-card-hover: 0 24px 50px rgba(79, 70, 229, 0.2);
  --color-ghost-bg: rgba(255, 255, 255, 0.65);
  --color-ghost-bg-hover: rgba(79, 70, 229, 0.12);
  --color-hero-stats-bg: rgba(255, 255, 255, 0.82);
  --color-highlight-bg: rgba(255, 255, 255, 0.82);
  --color-portrait-border: rgba(99, 102, 241, 0.35);
  --color-portrait-shadow: 0 30px 60px rgba(15, 23, 42, 0.18);
  --background-portrait-glow: radial-gradient(circle, rgba(99, 102, 241, 0.18), transparent 65%);
  --background-spotlight: linear-gradient(135deg, rgba(79, 70, 229, 0.08), rgba(20, 184, 166, 0.08));
  --color-footer-bg: rgba(248, 250, 252, 0.94);
  --color-footer-text: rgba(51, 65, 85, 0.85);
  --color-footer-copy: rgba(71, 85, 105, 0.7);
  --color-x-button-bg: #000000;
  --color-x-button-hover-bg: #222222;
  --color-x-button-text: #ffffff;
  --max-width: 1120px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --color-bg: #06060f;
    --background-body: radial-gradient(circle at top left, rgba(79, 70, 229, 0.32), transparent 45%),
      radial-gradient(circle at top right, rgba(20, 184, 166, 0.25), transparent 55%),
      #06060f;
    --color-surface: rgba(17, 17, 31, 0.82);
    --color-surface-strong: rgba(28, 29, 50, 0.9);
    --color-primary-soft: rgba(99, 102, 241, 0.2);
    --color-primary-tint: rgba(79, 70, 229, 0.16);
    --color-primary-border-soft: rgba(79, 70, 229, 0.35);
    --color-primary-border-strong: rgba(99, 102, 241, 0.6);
    --color-text: #f8fafc;
    --color-text-muted: rgba(226, 232, 240, 0.78);
    --color-text-subtle: rgba(148, 163, 184, 0.85);
    --color-text-meta: rgba(148, 163, 184, 0.75);
    --color-text-tertiary: rgba(148, 163, 184, 0.6);
    --color-border: rgba(148, 163, 184, 0.32);
    --color-border-soft: rgba(148, 163, 184, 0.4);
    --color-border-strong: rgba(148, 163, 184, 0.6);
    --color-footer-border: rgba(99, 102, 241, 0.25);
    --color-spotlight-border: rgba(99, 102, 241, 0.25);
    --shadow-soft: 0 20px 45px rgba(15, 23, 42, 0.45);
    --shadow-lifted: 0 24px 40px rgba(15, 23, 42, 0.35);
    --shadow-strong: 0 30px 60px rgba(15, 23, 42, 0.55);
    --shadow-card-hover: 0 24px 50px rgba(15, 23, 42, 0.5);
    --color-ghost-bg: rgba(15, 23, 42, 0.4);
    --color-ghost-bg-hover: rgba(148, 163, 184, 0.15);
    --color-hero-stats-bg: rgba(15, 23, 42, 0.5);
    --color-highlight-bg: rgba(15, 23, 42, 0.55);
    --color-portrait-border: rgba(99, 102, 241, 0.55);
    --color-portrait-shadow: 0 30px 60px rgba(15, 23, 42, 0.55);
    --background-portrait-glow: radial-gradient(circle, rgba(99, 102, 241, 0.3), transparent 65%);
    --background-spotlight: linear-gradient(135deg, rgba(79, 70, 229, 0.15), rgba(20, 184, 166, 0.12));
    --color-footer-bg: rgba(8, 8, 16, 0.96);
    --color-footer-text: rgba(148, 163, 184, 0.85);
    --color-footer-copy: rgba(148, 163, 184, 0.6);
    --color-accent: #2dd4bf;
    --color-accent-hover: #2dd4bf;
    --color-link-underline: rgba(20, 184, 166, 0.6);
    --color-x-button-bg: #ffffff;
    --color-x-button-hover-bg: #e2e8f0;
    --color-x-button-text: #0f172a;
  }
}

:root[data-theme="light"] {
  color-scheme: light;
  --color-bg: #f8fafc;
  --background-body: radial-gradient(circle at top left, rgba(79, 70, 229, 0.18), transparent 45%),
    radial-gradient(circle at top right, rgba(20, 184, 166, 0.18), transparent 55%),
    #f8fafc;
  --color-surface: rgba(255, 255, 255, 0.88);
  --color-surface-strong: rgba(255, 255, 255, 0.94);
  --color-primary-soft: rgba(99, 102, 241, 0.15);
  --color-primary-tint: rgba(79, 70, 229, 0.12);
  --color-primary-border-soft: rgba(79, 70, 229, 0.2);
  --color-primary-border-strong: rgba(79, 70, 229, 0.35);
  --color-text: #0b1120;
  --color-text-muted: rgba(15, 23, 42, 0.7);
  --color-text-subtle: rgba(51, 65, 85, 0.85);
  --color-text-meta: rgba(71, 85, 105, 0.7);
  --color-text-tertiary: rgba(71, 85, 105, 0.6);
  --color-border: rgba(148, 163, 184, 0.3);
  --color-border-soft: rgba(148, 163, 184, 0.35);
  --color-border-strong: rgba(100, 116, 139, 0.55);
  --color-footer-border: rgba(148, 163, 184, 0.35);
  --color-spotlight-border: rgba(79, 70, 229, 0.2);
  --shadow-soft: 0 20px 45px rgba(15, 23, 42, 0.08);
  --shadow-lifted: 0 24px 40px rgba(15, 23, 42, 0.08);
  --shadow-strong: 0 30px 60px rgba(15, 23, 42, 0.12);
  --shadow-card-hover: 0 24px 50px rgba(79, 70, 229, 0.2);
  --color-ghost-bg: rgba(255, 255, 255, 0.65);
  --color-ghost-bg-hover: rgba(79, 70, 229, 0.12);
  --color-hero-stats-bg: rgba(255, 255, 255, 0.82);
  --color-highlight-bg: rgba(255, 255, 255, 0.82);
  --color-portrait-border: rgba(99, 102, 241, 0.35);
  --color-portrait-shadow: 0 30px 60px rgba(15, 23, 42, 0.18);
  --background-portrait-glow: radial-gradient(circle, rgba(99, 102, 241, 0.18), transparent 65%);
  --background-spotlight: linear-gradient(135deg, rgba(79, 70, 229, 0.08), rgba(20, 184, 166, 0.08));
  --color-footer-bg: rgba(248, 250, 252, 0.94);
  --color-footer-text: rgba(51, 65, 85, 0.85);
  --color-footer-copy: rgba(71, 85, 105, 0.7);
  --color-x-button-bg: #000000;
  --color-x-button-hover-bg: #222222;
  --color-x-button-text: #ffffff;
  --color-accent-hover: #0d9488;
  --color-link-underline: rgba(20, 184, 166, 0.4);
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --color-bg: #06060f;
  --background-body: radial-gradient(circle at top left, rgba(79, 70, 229, 0.32), transparent 45%),
    radial-gradient(circle at top right, rgba(20, 184, 166, 0.25), transparent 55%),
    #06060f;
  --color-surface: rgba(17, 17, 31, 0.82);
  --color-surface-strong: rgba(28, 29, 50, 0.9);
  --color-primary-soft: rgba(99, 102, 241, 0.2);
  --color-primary-tint: rgba(79, 70, 229, 0.16);
  --color-primary-border-soft: rgba(79, 70, 229, 0.35);
  --color-primary-border-strong: rgba(99, 102, 241, 0.6);
  --color-text: #f8fafc;
  --color-text-muted: rgba(226, 232, 240, 0.78);
  --color-text-subtle: rgba(148, 163, 184, 0.85);
  --color-text-meta: rgba(148, 163, 184, 0.75);
  --color-text-tertiary: rgba(148, 163, 184, 0.6);
  --color-border: rgba(148, 163, 184, 0.32);
  --color-border-soft: rgba(148, 163, 184, 0.4);
  --color-border-strong: rgba(148, 163, 184, 0.6);
  --color-footer-border: rgba(99, 102, 241, 0.25);
  --color-spotlight-border: rgba(99, 102, 241, 0.25);
  --shadow-soft: 0 20px 45px rgba(15, 23, 42, 0.45);
  --shadow-lifted: 0 24px 40px rgba(15, 23, 42, 0.35);
  --shadow-strong: 0 30px 60px rgba(15, 23, 42, 0.55);
  --shadow-card-hover: 0 24px 50px rgba(15, 23, 42, 0.5);
  --color-ghost-bg: rgba(15, 23, 42, 0.4);
  --color-ghost-bg-hover: rgba(148, 163, 184, 0.15);
  --color-hero-stats-bg: rgba(15, 23, 42, 0.5);
  --color-highlight-bg: rgba(15, 23, 42, 0.55);
  --color-portrait-border: rgba(99, 102, 241, 0.55);
  --color-portrait-shadow: 0 30px 60px rgba(15, 23, 42, 0.55);
  --background-portrait-glow: radial-gradient(circle, rgba(99, 102, 241, 0.3), transparent 65%);
  --background-spotlight: linear-gradient(135deg, rgba(79, 70, 229, 0.15), rgba(20, 184, 166, 0.12));
  --color-footer-bg: rgba(8, 8, 16, 0.96);
  --color-footer-text: rgba(148, 163, 184, 0.85);
  --color-footer-copy: rgba(148, 163, 184, 0.6);
  --color-x-button-bg: #ffffff;
  --color-x-button-hover-bg: #e2e8f0;
  --color-x-button-text: #0f172a;
  --color-accent-hover: #2dd4bf;
  --color-link-underline: rgba(20, 184, 166, 0.6);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--background-body);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background 0.35s ease, color 0.35s ease;
}

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

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

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

.page {
  min-height: 100vh;
}

.hero {
  padding: 48px 24px 96px;
  position: relative;
}

.has-js .hero.hero--animate {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.has-js .hero.hero--visible {
  opacity: 1;
  transform: translateY(0);
}

.nav {
  max-width: var(--max-width);
  margin: 0 auto 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.nav__actions {
  display: flex;
  align-items: center;
  gap: 20px;
}

.nav__logo {
  font-weight: 700;
  letter-spacing: 0.04em;
  font-size: 1rem;
  text-transform: uppercase;
}

.nav__links {
  display: flex;
  gap: 20px;
  font-size: 0.95rem;
  color: var(--color-text-muted);
}

.nav__links a {
  padding: 8px 0;
  position: relative;
}

.nav__links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width 0.25s ease;
}

.nav__links a:hover::after,
.nav__links a:focus-visible::after {
  width: 100%;
}

.has-js .theme-toggle {
  display: inline-flex;
}

.theme-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  background: var(--color-ghost-bg);
  color: var(--color-text);
  font-size: 1.1rem;
  padding: 0;
  cursor: pointer;
  transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease,
    box-shadow 0.2s ease;
}

.theme-toggle:hover,
.theme-toggle:focus-visible {
  border-color: var(--color-border-strong);
  background: var(--color-ghost-bg-hover);
  box-shadow: 0 0 0 3px var(--color-primary-soft);
}

.theme-toggle:hover {
  transform: translateY(-1px);
}

.theme-toggle:focus-visible {
  outline: none;
}

.theme-toggle__icon {
  display: none;
  line-height: 1;
}

.theme-toggle__icon--sun {
  display: inline;
}

:root[data-theme="dark"] .theme-toggle__icon--sun {
  display: none;
}

:root[data-theme="dark"] .theme-toggle__icon--moon {
  display: inline;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) .theme-toggle__icon--sun {
    display: none;
  }

  :root:not([data-theme]) .theme-toggle__icon--moon {
    display: inline;
  }
}

.hero__content {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 48px;
  align-items: center;
}

.hero__text h1 {
  font-size: clamp(2.25rem, 4vw, 3.5rem);
  line-height: 1.05;
  margin: 12px 0 24px;
  font-weight: 700;
}

.hero__summary {
  color: var(--color-text-muted);
  font-size: 1.05rem;
  margin-bottom: 32px;
}

.eyebrow {
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--color-text-subtle);
  font-size: 0.8rem;
}

.hero__cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 28px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 22px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.button--primary {
  background: linear-gradient(135deg, var(--color-primary), #312e81);
  box-shadow: var(--shadow-soft);
  color: #ffffff;
}

.button--primary:hover {
  transform: translateY(-1px);
  background: linear-gradient(135deg, #4338ca, #1e1b4b);
  color: #ffffff;
}

.button--ghost {
  border-color: var(--color-border-soft);
  background: var(--color-ghost-bg);
}

.button--ghost:hover {
  background: var(--color-ghost-bg-hover);
  border-color: var(--color-border-strong);
}

/* X (formerly Twitter) button style to match x.com branding */
.button.button--x {
  background: var(--color-x-button-bg);
  color: var(--color-x-button-text);
  border: none;
  border-radius: 8px;
  padding: 0.6em 1.4em;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
  gap: 0.5em;
}

.button.button--x:hover {
  background: var(--color-x-button-hover-bg);
  color: var(--color-x-button-text);
  transform: translateY(-1px);
}

.button.button--x svg {
  display: block;
  margin-right: 0;
}

.hero__stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 24px;
  padding: 24px;
  background: var(--color-hero-stats-bg);
  border: 1px solid var(--color-border);
  border-radius: 18px;
}

.hero__stats dt {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-tertiary);
}

.hero__stats dd {
  font-size: 1.05rem;
  font-weight: 600;
  margin: 6px 0 0;
}

.hero__portrait {
  position: relative;
  justify-self: center;
}

.hero__portrait img {
  width: min(320px, 80vw);
  border-radius: 26px;
  border: 2px solid var(--color-portrait-border);
  box-shadow: var(--color-portrait-shadow);
}

.portrait__glow {
  position: absolute;
  inset: -14%;
  background: var(--background-portrait-glow);
  filter: blur(2px);
  border-radius: 32px;
  z-index: -1;
}

main {
  padding: 48px 24px 120px;
}

.section {
  max-width: var(--max-width);
  margin: 0 auto 96px;
}

.section__intro {
  max-width: 720px;
  margin-bottom: 32px;
}

.section__description {
  color: var(--color-text-muted);
}

.about__grid {
  display: grid;
  gap: 28px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.about__grid p {
  margin: 0;
  color: var(--color-text-muted);
}

.about__highlights {
  list-style: none;
  margin: 0;
  padding: 24px;
  background: var(--color-highlight-bg);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  display: grid;
  gap: 12px;
}

.about__highlights a {
  text-decoration: underline;
  text-decoration-color: var(--color-link-underline);
}

.skills {
  position: relative;
}

.skill-groups {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.skill-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 22px;
  padding: 28px;
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow-lifted);
}

.skill-card h3 {
  margin-top: 0;
  margin-bottom: 12px;
}

.skill-card p {
  color: var(--color-text-muted);
  margin-bottom: 18px;
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.skill-tags span {
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--color-primary-tint);
  border: 1px solid var(--color-primary-border-soft);
  font-size: 0.85rem;
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 32px;
}

.project-card {
  padding: 32px;
  background: var(--color-surface-strong);
  border-radius: 24px;
  border: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: 16px;
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.project-card:hover {
  transform: translateY(-6px);
  border-color: var(--color-primary-border-strong);
  box-shadow: var(--shadow-card-hover);
}

.project-card__meta {
  display: flex;
  justify-content: space-between;
  font-size: 0.82rem;
  color: var(--color-text-meta);
}

.project-card h3 {
  margin: 0;
  font-size: 1.4rem;
}

.project-card p {
  margin: 0;
  color: var(--color-text-muted);
}

.project-card ul {
  margin: 0;
  padding-left: 20px;
  color: var(--color-text-muted);
  display: grid;
  gap: 8px;
}

.project-card a {
  margin-top: auto;
  color: var(--color-accent);
  font-weight: 600;
}

.project-card a:hover {
  color: var(--color-accent-hover);
}

.spotlight {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 32px;
  background: var(--background-spotlight);
  border-radius: 30px;
  padding: 48px;
  border: 1px solid var(--color-spotlight-border);
}

.spotlight__content p {
  color: var(--color-text-muted);
}

.spotlight__stats {
  display: grid;
  gap: 24px;
}

.spotlight__value {
  display: block;
  font-size: 2.4rem;
  font-weight: 700;
}

.spotlight__label {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  letter-spacing: 0.02em;
}

.footer {
  background: var(--color-footer-bg);
  padding: 72px 24px 48px;
  border-top: 1px solid var(--color-footer-border);
}

.footer__inner {
  max-width: var(--max-width);
  margin: 0 auto 48px;
  display: grid;
  gap: 32px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.footer__inner h2 {
  margin: 12px 0 20px;
}

.footer__inner p {
  color: var(--color-text-muted);
  margin: 0 0 24px;
}

.footer__cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.footer__links {
  display: grid;
  gap: 12px;
  align-content: start;
  color: var(--color-footer-text);
}

.footer__copy {
  max-width: var(--max-width);
  margin: 0 auto;
  text-align: center;
  color: var(--color-footer-copy);
  font-size: 0.86rem;
}

@media (max-width: 760px) {
  .nav__links {
    display: none;
  }

  .nav__actions {
    gap: 12px;
  }

  .hero {
    padding-top: 32px;
  }

  .hero__content {
    text-align: center;
  }

  .hero__cta,
  .hero__stats {
    justify-content: center;
  }

  .hero__portrait {
    order: -1;
  }

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

  .spotlight {
    padding: 36px;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    transition-duration: 0.001ms !important;
    animation-duration: 0.001ms !important;
  }
}