/* ==========================================================================
   Layout — containers, section rhythm, grids
   ========================================================================== */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 4vw, 3rem);
}

section {
  position: relative;
  padding-block: var(--space-3xl);
}

.section-head {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  margin-bottom: var(--space-2xl);
  max-width: 640px;
}

.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
  font-family: var(--font-display);
  font-size: var(--fs-xs);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
}

.section-eyebrow::before {
  content: '';
  width: 28px;
  height: 1.5px;
  background: var(--gradient-accent);
  display: inline-block;
}

.section-title {
  font-size: var(--fs-h1);
  line-height: 1.1;
}

.section-desc {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 56ch;
}

/* Header */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 500;
  height: var(--header-height);
  display: flex;
  align-items: center;
  border-bottom: 1px solid transparent;
  transition: background var(--dur-base) var(--ease-out), border-color var(--dur-base) var(--ease-out), backdrop-filter var(--dur-base) var(--ease-out);
}

.site-header.is-scrolled {
  background: rgba(11, 15, 25, 0.72);
  backdrop-filter: blur(16px) saturate(140%);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  border-bottom-color: var(--border);
}

.site-header__inner {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.nav__links {
  display: flex;
  gap: var(--space-md);
  font-size: var(--fs-small);
  font-weight: 500;
  color: var(--text-secondary);
}

.nav__links a {
  position: relative;
  padding-block: 6px;
  transition: color var(--dur-fast) var(--ease-out);
}

.nav__links a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-accent);
  transition: width var(--dur-base) var(--ease-out);
}

.nav__links a:hover,
.nav__links a:focus-visible,
.nav__links a.is-active {
  color: var(--text-primary);
}

.nav__links a:hover::after,
.nav__links a.is-active::after {
  width: 100%;
}

/* Hero */
.hero {
  position: relative;
  display: flex;
  align-items: center;
  min-height: 100svh;
  padding-top: var(--header-height);
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: -1;
}

.hero__grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: var(--space-2xl);
  align-items: center;
  width: 100%;
}

.hero__content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-md);
}

.hero__kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
  padding: 0.45em 0.9em 0.45em 0.6em;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-pill);
  font-size: var(--fs-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.02);
}

.hero__kicker .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent-glow);
}

.hero__title {
  font-size: var(--fs-hero);
  line-height: 1.02;
  letter-spacing: -0.03em;
}

.hero__title .line {
  display: block;
  overflow: hidden;
}

.hero__title .gradient-text {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero__role {
  font-family: var(--font-display);
  font-size: clamp(1.1rem, 2vw, 1.5rem);
  color: var(--text-secondary);
  font-weight: 500;
}

.hero__desc {
  color: var(--text-secondary);
  max-width: 54ch;
  font-size: 1.05rem;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-top: var(--space-xs);
}

.hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  margin-top: var(--space-sm);
  color: var(--text-muted);
  font-size: var(--fs-small);
}

.hero__meta span {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
}

.hero__portrait {
  position: relative;
  justify-self: center;
  width: min(100%, 420px);
}

.hero__portrait-frame {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4 / 4.6;
  border: 1px solid var(--border-strong);
  background: linear-gradient(160deg, var(--surface), var(--bg-soft));
  box-shadow: var(--shadow-lg);
}

.hero__portrait img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
}

.hero__portrait-glow {
  position: absolute;
  inset: -20%;
  background: radial-gradient(closest-side, var(--accent-glow), transparent 70%);
  filter: blur(30px);
  opacity: 0.55;
  z-index: -1;
}

.hero__stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-sm);
  margin-top: var(--space-2xl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--border);
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 0.2em;
}

.stat__value {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 700;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.stat__label {
  font-size: var(--fs-xs);
  color: var(--text-muted);
  letter-spacing: 0.04em;
}

.scroll-cue {
  position: absolute;
  left: 50%;
  bottom: var(--space-lg);
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-muted);
  font-size: var(--fs-xs);
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

/* About */
.about__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
  align-items: start;
}

.about__text p + p {
  margin-top: var(--space-sm);
}

.about__text {
  color: var(--text-secondary);
  font-size: 1.05rem;
}

.about__highlights {
  display: grid;
  gap: var(--space-sm);
}

/* Experience Timeline */
.timeline {
  position: relative;
  max-width: 820px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 11px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: linear-gradient(var(--accent), transparent 95%);
  opacity: 0.4;
}

.timeline__item {
  position: relative;
  padding-left: var(--space-xl);
  padding-bottom: var(--space-xl);
}

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

.timeline__dot {
  position: absolute;
  left: 0;
  top: 6px;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--bg-soft);
  border: 2px solid var(--accent);
  box-shadow: 0 0 0 4px rgba(69, 230, 255, 0.08);
}

.timeline__dot::after {
  content: '';
  position: absolute;
  inset: 6px;
  border-radius: 50%;
  background: var(--gradient-accent);
}

.timeline__date {
  font-family: var(--font-display);
  font-size: var(--fs-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.4em;
  display: block;
}

.timeline__role {
  font-size: var(--fs-h3);
  margin-bottom: 0.15em;
}

.timeline__org {
  color: var(--text-secondary);
  font-weight: 500;
  margin-bottom: var(--space-sm);
}

.timeline__list {
  display: grid;
  gap: 0.55em;
  color: var(--text-secondary);
}

.timeline__list li {
  position: relative;
  padding-left: 1.3em;
  font-size: 0.98rem;
}

.timeline__list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

/* Projects */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: var(--space-xl);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
}

.project-card {
  grid-column: span 1;
}

.project-card--feature {
  grid-column: span 2;
}

/* Skills */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
}

/* Contact */
.contact__grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--space-2xl);
  align-items: center;
}

.contact__links {
  display: grid;
  gap: var(--space-sm);
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding-block: var(--space-lg);
}

.site-footer__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  color: var(--text-muted);
  font-size: var(--fs-small);
}

.footer__socials {
  display: flex;
  gap: var(--space-sm);
}