/* Base layout — reset, typography, sections, header, footer — Revamp 2.0 */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

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

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

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

button:focus:not(:focus-visible) {
  outline: none;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: var(--leading-tight);
  margin: 0 0 var(--space-md);
  letter-spacing: -0.015em;
}

p {
  margin: 0 0 var(--space-md);
}

p:last-child {
  margin-bottom: 0;
}

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

/* Skip link */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-md);
  z-index: 1000;
  padding: var(--space-sm) var(--space-md);
  background: var(--accent);
  color: var(--bg);
  border-radius: var(--radius-sm);
  font-weight: 600;
}

.skip-link:focus {
  top: var(--space-md);
}

/* Container */
.container {
  width: var(--container);
  margin-inline: auto;
}

/* Section */
.section {
  padding-block: var(--space-section);
  position: relative;
}

.section--alt {
  background: var(--bg-elevated);
}

.section-header {
  text-align: center;
  max-width: 46rem;
  margin-inline: auto;
  margin-bottom: var(--space-2xl);
}

.section-kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin-bottom: var(--space-xs);
  font-weight: 600;
}

.section-header h2 {
  font-size: var(--text-2xl);
  margin-bottom: var(--space-md);
  position: relative;
  display: inline-block;
  color: #fff;
}

.section-header h2::after {
  content: "";
  display: block;
  width: 2.75rem;
  height: 3px;
  background: var(--accent-gradient);
  margin: var(--space-sm) auto 0;
  border-radius: var(--radius-full);
}

.section-header p {
  color: var(--text-muted);
  font-size: var(--text-lg);
  line-height: var(--leading-relaxed);
}

/* Site header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-h);
  background: var(--glass);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition), border-color var(--transition);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  width: var(--container);
  margin-inline: auto;
}

.site-logo {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-lg);
  color: var(--text);
  letter-spacing: -0.01em;
}

.site-logo:hover {
  color: var(--accent);
}

.site-logo .version-tag {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 600;
  padding: 0.15rem 0.45rem;
  border-radius: var(--radius-full);
  background: var(--accent-muted);
  color: var(--accent);
  border: 1px solid var(--border-accent);
}

.site-nav {
  display: none;
}

.site-nav ul {
  display: flex;
  gap: 0.35rem;
}

.site-nav a {
  color: var(--text-muted);
  font-size: var(--text-sm);
  font-weight: 500;
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
}

.site-nav a:hover,
.site-nav a.is-active {
  color: var(--text);
  background: var(--surface);
}

.site-nav a.is-active {
  color: var(--accent);
  font-weight: 600;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.header-social {
  display: none;
  gap: var(--space-xs);
}

.header-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  border: 1px solid var(--border);
  transition: color var(--transition), border-color var(--transition), background var(--transition), transform var(--transition);
}

.header-social a:hover {
  color: var(--accent);
  border-color: var(--border-accent);
  background: var(--accent-muted);
  transform: translateY(-1px);
}

.nav-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  font-size: 1.25rem;
}

.nav-toggle:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

.mobile-nav {
  display: none;
  position: fixed;
  inset: var(--header-h) 0 0 0;
  z-index: 99;
  background: var(--bg);
  border-top: 1px solid var(--border);
  padding: var(--space-lg);
  overflow-y: auto;
}

.mobile-nav.is-open {
  display: block;
}

.mobile-nav ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.mobile-nav a {
  display: block;
  padding: var(--space-md);
  color: var(--text);
  font-weight: 500;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
}

.mobile-nav a:hover,
.mobile-nav a.is-active {
  background: var(--surface);
  border-color: var(--border);
  color: var(--accent);
}

@media (min-width: 900px) {
  .site-nav {
    display: block;
  }

  .header-social {
    display: flex;
  }

  .nav-toggle {
    display: none;
  }
}

/* Hero */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: calc(var(--header-h) + var(--space-xl)) var(--space-md) var(--space-2xl);
  overflow: hidden;
  text-align: center;
}

.hero__mesh {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse 70% 45% at 50% 0%, rgba(56, 189, 248, 0.18), transparent 70%),
    radial-gradient(ellipse 50% 35% at 85% 70%, rgba(99, 102, 241, 0.1), transparent),
    radial-gradient(ellipse 45% 30% at 15% 80%, rgba(20, 184, 166, 0.08), transparent);
}

.hero__grain {
  position: absolute;
  inset: 0;
  opacity: 0.035;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.hero__content {
  position: relative;
  z-index: 1;
  max-width: 48rem;
  margin-inline: auto;
}

.hero h1 {
  font-size: var(--text-hero);
  margin-bottom: var(--space-sm);
  letter-spacing: -0.025em;
  color: #fff;
}

.hero__roles {
  font-size: var(--text-xl);
  color: var(--text-muted);
  margin-bottom: var(--space-md);
  min-height: 1.6em;
  font-family: var(--font-display);
}

.hero__roles .role-text {
  color: var(--accent);
  font-weight: 700;
  border-right: 2px solid var(--accent);
  padding-right: 2px;
  animation: blink-caret 0.8s infinite;
}

@keyframes blink-caret {
  from, to { border-color: transparent }
  50% { border-color: var(--accent) }
}

.hero__subtitle {
  font-size: var(--text-lg);
  color: var(--text-muted);
  line-height: var(--leading-relaxed);
  max-width: 42rem;
  margin-inline: auto;
  margin-bottom: var(--space-xl);
}

/* Quick Action Strip in Hero */
.hero-quick-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  margin-top: var(--space-md);
  font-size: var(--text-xs);
  color: var(--text-muted);
}

.quick-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.75rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition);
  font-family: var(--font-mono);
}

.quick-chip:hover {
  background: var(--surface-hover);
  color: var(--text);
  border-color: var(--border-accent);
}

/* Main offset for fixed header on anchor scroll */
main {
  scroll-margin-top: var(--header-h);
}

[id] {
  scroll-margin-top: calc(var(--header-h) + var(--space-md));
}

/* About grid */
.about-grid {
  display: grid;
  gap: var(--space-2xl);
  align-items: start;
}

@media (min-width: 768px) {
  .about-grid {
    grid-template-columns: minmax(220px, 300px) 1fr;
  }
}

.about-photo-wrapper {
  position: relative;
}

.about-photo {
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-strong);
  box-shadow: var(--shadow-md);
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
}

.about-photo-wrapper::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-accent);
  pointer-events: none;
}

.about-content h3 {
  font-size: var(--text-xl);
  color: #fff;
  margin-bottom: 0.25rem;
}

.about-content .about-title-tag {
  color: var(--accent);
  font-weight: 600;
  font-size: var(--text-sm);
  display: block;
  margin-bottom: var(--space-md);
}

.about-meta {
  display: grid;
  gap: var(--space-sm);
  margin: var(--space-lg) 0;
  padding: var(--space-md);
  background: var(--surface);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
}

@media (min-width: 540px) {
  .about-meta {
    grid-template-columns: 1fr 1fr;
  }
}

.about-meta li {
  display: flex;
  gap: var(--space-sm);
  font-size: var(--text-sm);
  color: var(--text-muted);
}

.about-meta strong {
  color: var(--text);
  font-weight: 600;
  min-width: 4.5rem;
}

.about-meta a {
  color: var(--accent);
}

/* Experience layout */
.experience-grid {
  display: grid;
  gap: var(--space-2xl);
}

@media (min-width: 900px) {
  .experience-grid {
    grid-template-columns: minmax(260px, 320px) 1fr;
    gap: var(--space-2xl);
  }
}

/* Footer */
.site-footer {
  padding: var(--space-2xl) var(--space-md);
  border-top: 1px solid var(--border);
  text-align: center;
  color: var(--text-muted);
  font-size: var(--text-sm);
  background: var(--bg);
}

.site-footer__links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-md);
  margin-top: var(--space-md);
}

.site-footer__links a {
  color: var(--accent);
}

/* Back to top */
.back-to-top {
  position: fixed;
  bottom: var(--space-lg);
  right: var(--space-lg);
  z-index: 50;
  width: 2.75rem;
  height: 2.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text);
  opacity: 0;
  visibility: hidden;
  transform: translateY(0.5rem);
  transition: opacity var(--transition), visibility var(--transition), transform var(--transition), background var(--transition);
}

.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--accent);
  color: var(--bg);
  border-color: var(--accent);
}

.back-to-top:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

/* Toast notification */
.toast-notice {
  position: fixed;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%) translateY(2rem);
  opacity: 0;
  visibility: hidden;
  background: var(--surface-active);
  color: #fff;
  border: 1px solid var(--accent);
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  z-index: 1000;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: transform var(--transition), opacity var(--transition), visibility var(--transition);
  pointer-events: none;
}

.toast-notice.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.toast-notice i {
  color: var(--accent);
}

/* Reveal animation */
.reveal {
  opacity: 0;
  transform: translateY(1.25rem);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}