/* ===== NAV ===== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  background: rgba(9, 9, 11, 0.75);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--color-border);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.nav__logo {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.nav__logo span {
  color: var(--color-accent);
}

.nav__links {
  display: none;
  align-items: center;
  gap: var(--space-lg);
}

.nav__link {
  font-size: 1.4rem;
  font-weight: 500;
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
  position: relative;
}

.nav__link:hover,
.nav__link.is-active {
  color: var(--color-text);
}

.nav__link.is-active::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-neon-cyan), var(--color-accent), var(--color-neon-purple));
  border-radius: 2px;
  box-shadow: 0 0 8px var(--color-neon-glow);
}

.nav__github {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.2rem;
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--color-text);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.nav__github:hover {
  border-color: var(--color-border-accent);
  background: var(--color-surface-hover);
}

.nav__github svg {
  width: 16px;
  height: 16px;
}

.nav__toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  padding: 6px;
}

.nav__toggle-bar {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.nav.is-open .nav__toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav.is-open .nav__toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav.is-open .nav__toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.nav__mobile {
  display: none;
  position: fixed;
  inset: 0;
  padding: calc(var(--nav-height) + var(--space-xl)) var(--space-md) var(--space-xl);
  background: var(--color-bg);
  flex-direction: column;
  gap: var(--space-lg);
  z-index: 1001;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.nav.is-open .nav__mobile {
  display: flex;
}

@media (max-width: 899px) {
  .nav.is-open {
    background: var(--color-bg);
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }

  .nav.is-open .nav__inner {
    position: relative;
    z-index: 1002;
  }
}

.nav__mobile .nav__link {
  font-size: 2rem;
  font-weight: 600;
}

@media (min-width: 900px) {
  .nav__links {
    display: flex;
  }

  .nav__toggle {
    display: none;
  }
}

/* ===== HERO ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--nav-height);
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, black, transparent);
}

.hero__bg-gradient {
  position: absolute;
  inset: 0;
  --hero-gx: 50%;
  --hero-gy: 40%;
  background:
    radial-gradient(ellipse 55% 45% at var(--hero-gx) var(--hero-gy), rgba(99, 91, 255, 0.14), transparent 70%),
    radial-gradient(ellipse 40% 35% at 80% 70%, rgba(34, 211, 238, 0.08), transparent 65%),
    radial-gradient(ellipse 35% 30% at 15% 75%, rgba(167, 139, 250, 0.07), transparent 60%);
  animation: hero-gradient-drift 24s ease-in-out infinite alternate;
}

@keyframes hero-gradient-drift {
  from {
    filter: hue-rotate(0deg);
    opacity: 0.9;
  }
  to {
    filter: hue-rotate(12deg);
    opacity: 1;
  }
}

.hero__glow {
  position: absolute;
  width: 480px;
  height: 480px;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.2;
}

.hero__glow--1 {
  top: -10%;
  left: 20%;
  background: var(--color-accent);
}

.hero__glow--2 {
  bottom: 10%;
  right: 10%;
  background: var(--color-neon-blue);
  opacity: 0.12;
}

.hero__content {
  position: relative;
  z-index: 1;
  max-width: 820px;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.5rem 1.2rem;
  margin-bottom: var(--space-lg);
  font-family: var(--font-mono);
  font-size: 1.2rem;
  font-weight: 500;
  color: var(--color-accent);
  background: rgba(99, 91, 255, 0.1);
  border: 1px solid var(--color-border-accent);
  border-radius: 999px;
}

.hero__badge-dot {
  width: 6px;
  height: 6px;
  background: var(--color-success);
  border-radius: 50%;
}

.hero__title {
  font-size: clamp(3.6rem, 7vw, 6.4rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.05;
  margin-bottom: var(--space-sm);
}

.hero__title-accent {
  margin-top: -0.05em;
}

.hero__title em {
  font-style: normal;
  background: linear-gradient(
    120deg,
    var(--color-text) 0%,
    var(--color-neon-cyan) 35%,
    var(--color-accent) 55%,
    var(--color-neon-purple) 75%,
    var(--color-text) 100%
  );
  background-size: 220% auto;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: hero-accent-sweep 7s ease-in-out infinite;
}

@keyframes hero-accent-sweep {
  0%, 100% {
    background-position: 0% center;
  }
  50% {
    background-position: 100% center;
  }
}

.hero__role {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: -0.02em;
  margin-bottom: 0.4rem;
}

.hero__meta {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  color: var(--color-text-subtle);
  letter-spacing: 0.02em;
  margin-bottom: var(--space-md);
}

.hero__role span {
  color: var(--color-accent);
}

.hero__desc {
  font-size: 1.85rem;
  color: var(--color-text-muted);
  line-height: 1.75;
  max-width: 58ch;
  margin-bottom: var(--space-lg);
}

.hero__proof {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-bottom: var(--space-lg);
}

.hero__proof-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.7rem 1.4rem;
  font-size: 1.3rem;
  font-weight: 500;
  color: var(--color-text);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  letter-spacing: -0.01em;
}

.hero__proof-badge--stack {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  color: var(--color-text-muted);
}

/* ===== ENGINEERING SNAPSHOT ===== */
.eng-snapshot {
  padding-block: var(--space-lg);
  border-block: 1px solid var(--color-border);
  background: var(--color-bg-elevated);
}

.eng-snapshot__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--color-border);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.eng-snapshot__item {
  padding: var(--space-sm) var(--space-md);
  background: var(--color-bg-elevated);
}

.eng-snapshot__label {
  font-size: 1.1rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-text-subtle);
  margin-bottom: 0.25rem;
}

.eng-snapshot__stack {
  font-size: 1.35rem;
  font-family: var(--font-mono);
  color: var(--color-text-muted);
  line-height: 1.5;
}

@media (min-width: 640px) {
  .eng-snapshot__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .eng-snapshot__grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ===== HIGHLIGHTS (legacy — unused) ===== */
.highlights {
  padding-block: var(--space-xl);
  border-block: 1px solid var(--color-border);
  background: var(--color-bg-elevated);
}

.highlights__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-sm);
}

.highlight-card {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-lg);
  background: var(--glass-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-base), transform var(--transition-base);
}

.highlight-card:hover {
  border-color: var(--color-border-accent);
}

.highlight-card__icon {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(99, 91, 255, 0.12);
  border-radius: var(--radius-sm);
  color: var(--color-accent);
}

.highlight-card__icon svg {
  width: 20px;
  height: 20px;
}

.highlight-card__metric {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: 0.2rem;
}

.highlight-card__label {
  font-size: 1.3rem;
  color: var(--color-text-muted);
  line-height: 1.4;
}

@media (min-width: 600px) {
  .highlights__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .highlights__grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ===== ABOUT ===== */
.about__grid {
  display: grid;
  gap: var(--space-xl);
  align-items: center;
}

.about__text p {
  font-size: 1.7rem;
  color: var(--color-text-muted);
  line-height: 1.8;
  margin-bottom: var(--space-md);
}

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

.about__photo {
  width: 200px;
  height: 200px;
  border-radius: var(--radius-xl);
  object-fit: cover;
  border: 1px solid var(--color-border);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}

@media (min-width: 768px) {
  .about__grid {
    grid-template-columns: 1fr auto;
  }
}

.collab-block {
  margin-top: var(--space-xl);
  padding: var(--space-lg);
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.collab-block__title {
  font-size: 1.6rem;
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

.collab-block__desc {
  font-size: 1.5rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: var(--space-md);
  max-width: 65ch;
}

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

.collab-block__item {
  display: grid;
  gap: 0.2rem;
  padding: var(--space-sm) var(--space-md);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
}

.collab-block__role {
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--color-accent);
}

.collab-block__detail {
  font-size: 1.35rem;
  color: var(--color-text-muted);
  line-height: 1.5;
}

@media (min-width: 768px) {
  .collab-block__list {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ===== EXPERIENCE ===== */
.experience {
  background: linear-gradient(180deg, rgba(99, 91, 255, 0.04) 0%, transparent 100%);
}

.experience--featured {
  position: relative;
}

.timeline__item--primary {
  border-color: var(--color-border-accent);
  background: rgba(99, 91, 255, 0.05);
  padding: var(--space-xl);
}

.timeline__featured-label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-sm);
}

.timeline__emphasis {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin: var(--space-md) 0;
  padding-bottom: var(--space-md);
  border-bottom: 1px solid var(--color-border);
}

.timeline__emphasis-pill {
  padding: 0.5rem 1rem;
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--color-text);
  background: rgba(99, 91, 255, 0.12);
  border: 1px solid var(--color-border-accent);
  border-radius: var(--radius-sm);
}

.timeline__item--secondary {
  opacity: 0.92;
}

.timeline {
  position: relative;
  margin-top: var(--space-xl);
  padding-left: var(--space-lg);
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--color-neon-cyan), var(--color-accent), var(--color-border));
  transform: scaleY(0);
  transform-origin: top center;
  transition: transform 1s var(--motion-ease);
}

.timeline.is-visible::before {
  transform: scaleY(1);
}

.timeline__item {
  position: relative;
  margin-bottom: var(--space-xl);
  padding: var(--space-lg);
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  opacity: 0;
  transform: translate3d(-24px, 0, 0);
  transition:
    opacity var(--motion-duration) var(--motion-ease),
    transform var(--motion-duration) var(--motion-ease),
    border-color var(--transition-base);
}

.timeline__item:nth-child(even) {
  transform: translate3d(24px, 0, 0);
}

.timeline__item.is-visible {
  opacity: 1;
  transform: translate3d(0, 0, 0);
}

.timeline__item:hover {
  border-color: rgba(99, 91, 255, 0.28);
}

.timeline__item::before {
  content: '';
  position: absolute;
  left: calc(-1 * var(--space-lg) - 5px);
  top: var(--space-lg);
  width: 12px;
  height: 12px;
  background: var(--color-accent);
  border-radius: 50%;
  box-shadow: 0 0 12px var(--color-accent-glow);
}

.timeline__header {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-sm);
  margin-bottom: var(--space-sm);
}

.timeline__role {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.timeline__company {
  font-size: 1.5rem;
  color: var(--color-accent);
  font-weight: 600;
}

.timeline__date {
  font-family: var(--font-mono);
  font-size: 1.2rem;
  color: var(--color-text-subtle);
}

.timeline__list {
  margin-top: var(--space-md);
}

.timeline__list li {
  position: relative;
  padding-left: 1.6rem;
  font-size: 1.55rem;
  color: var(--color-text-muted);
  line-height: 1.75;
  margin-bottom: 0.6rem;
}

.timeline__list li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-size: 1.2rem;
}

@media (min-width: 768px) {
  .timeline {
    padding-left: var(--space-xl);
  }

  .timeline__item {
    padding: var(--space-xl);
  }

  .timeline__role {
    font-size: 2.4rem;
  }
}

/* ===== PROJECTS ===== */
.projects__grid {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
  margin-top: var(--space-xl);
}

.project-card {
  position: relative;
  padding: var(--space-xl);
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: border-color var(--transition-base), transform var(--transition-base);
}

.project-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent), #0070f3);
  opacity: 0;
  transition: opacity var(--transition-base);
}

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

.project-card:hover::before {
  opacity: 1;
}

.project-card__number {
  font-family: var(--font-mono);
  font-size: 1.2rem;
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
}

.project-card__title {
  font-size: clamp(2.2rem, 4vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-xs);
}

.project-card__tagline {
  font-size: 1.55rem;
  color: var(--color-text-subtle);
  margin-bottom: var(--space-sm);
}

.project-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: var(--space-md);
}

.project-card__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.case-study {
  display: grid;
  gap: var(--space-md);
  margin: var(--space-md) 0 var(--space-lg);
  padding: var(--space-lg);
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.case-study__block {
  display: grid;
  gap: 0.4rem;
}

.case-study__label {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.case-study__text {
  font-size: 1.55rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  max-width: 65ch;
}

/* ===== ENGINEERING PROFILE ===== */
.eng-profile {
  background: var(--color-bg-elevated);
  border-block: 1px solid var(--color-border);
}

.eng-profile.section--lg {
  padding-block: var(--space-xl);
}

.eng-profile__stack {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  margin-top: var(--space-lg);
}

.eng-profile__leetcode {
  padding: var(--space-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
}

.eng-profile__github-panel {
  padding: var(--space-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  display: grid;
  gap: var(--space-md);
}

.eng-profile__github-stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-sm);
}

.eng-profile__github-info {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.leetcode-stat--wide {
  grid-column: 1 / -1;
}

.leetcode-stat__value--mono {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-accent);
}

.leetcode-heatmap__fallback {
  font-size: 1.35rem;
  color: var(--color-text-muted);
  text-align: center;
  padding: var(--space-md);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-md);
}

.leetcode-heatmap__fallback a {
  color: var(--color-accent);
}

.eng-profile__grid {
  display: grid;
  gap: var(--space-md);
}

.eng-profile__card {
  padding: var(--space-lg);
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition-base);
}

.eng-profile__card:hover {
  border-color: var(--color-border-accent);
}

.eng-profile__card-title {
  font-size: 1.6rem;
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

.eng-profile__card-desc {
  font-size: 1.4rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: var(--space-md);
}

.eng-profile__list {
  display: grid;
  gap: 0.5rem;
}

.eng-profile__list li {
  font-size: 1.35rem;
  color: var(--color-text-muted);
  padding-left: 1.4rem;
  position: relative;
  line-height: 1.5;
}

.eng-profile__list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
}

.eng-profile__list--projects li {
  display: grid;
  gap: 0.15rem;
  padding-left: 0;
}

.eng-profile__list--projects li::before {
  display: none;
}

.eng-profile__project-name {
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--color-text);
}

.eng-profile__project-detail {
  font-size: 1.25rem;
  color: var(--color-text-subtle);
}

.eng-profile__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: var(--space-md);
}

.eng-profile__ownership-label {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
}

.eng-profile__ownership-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.eng-profile__ownership-grid span {
  font-size: 1.2rem;
  font-weight: 500;
  padding: 0.4rem 0.9rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-muted);
}

.leetcode-panel__stats--featured {
  grid-template-columns: repeat(2, 1fr);
}

.leetcode-stat--highlight .leetcode-stat__value {
  color: var(--color-accent);
  font-size: 2.4rem;
}

.leetcode-stat--badge .leetcode-stat__value {
  color: var(--color-success);
}

@media (min-width: 600px) {
  .leetcode-panel__stats--featured {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 900px) {
  .eng-profile__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .eng-profile__github-stats {
    grid-template-columns: 180px 1fr;
  }

  .leetcode-stat--wide {
    grid-column: auto;
  }

  .leetcode-panel__stats--featured {
    grid-template-columns: repeat(6, 1fr);
  }
}

/* ===== GITHUB (legacy helpers) ===== */
.github-section {
  background: var(--color-bg-elevated);
  border-block: 1px solid var(--color-border);
}

.github-section.section--lg {
  padding-block: var(--space-xl);
}

.github__layout {
  display: grid;
  gap: var(--space-md);
  margin-top: var(--space-md);
}

.github__activity {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

/* ===== LEETCODE PANEL ===== */
.leetcode-panel {
  padding: var(--space-md);
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.leetcode-panel__header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-md);
  margin-bottom: var(--space-md);
}

.leetcode-panel__title {
  font-size: 1.6rem;
  font-weight: 600;
  margin-bottom: 0.2rem;
}

.leetcode-panel__subtitle {
  font-size: 1.25rem;
  color: var(--color-text-subtle);
}

.leetcode-panel__link {
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-accent);
  padding: 0.4rem 0.8rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition-fast);
}

.leetcode-panel__link:hover {
  border-color: var(--color-border-accent);
}

.leetcode-panel__stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

.leetcode-stat {
  padding: var(--space-sm) var(--space-md);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  text-align: center;
}

.leetcode-stat__value {
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-text);
}

.leetcode-stat__value--loading {
  color: var(--color-text-subtle);
  font-size: 1.4rem;
}

.leetcode-stat__label {
  font-size: 1.1rem;
  color: var(--color-text-subtle);
  margin-top: 0.2rem;
}

.leetcode-heatmap {
  margin-top: var(--space-md);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  opacity: 0;
  transform: translate3d(0, 12px, 0);
  transition:
    opacity var(--motion-duration) var(--motion-ease),
    transform var(--motion-duration) var(--motion-ease);
}

.leetcode-heatmap.is-visible {
  opacity: 1;
  transform: translate3d(0, 0, 0);
}

.leetcode-heatmap__grid {
  display: flex;
  gap: 3px;
  min-width: min-content;
  padding-bottom: var(--space-xs);
}

.leetcode-heatmap__week {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.leetcode-heatmap__day {
  width: 11px;
  height: 11px;
  border-radius: 2px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
}

.leetcode-heatmap__day[data-level="1"] {
  background: rgba(99, 91, 255, 0.25);
  border-color: rgba(99, 91, 255, 0.3);
}

.leetcode-heatmap__day[data-level="2"] {
  background: rgba(99, 91, 255, 0.45);
  border-color: rgba(99, 91, 255, 0.5);
}

.leetcode-heatmap__day[data-level="3"] {
  background: rgba(99, 91, 255, 0.7);
  border-color: rgba(99, 91, 255, 0.75);
}

.leetcode-heatmap__day[data-level="4"] {
  background: var(--color-accent);
  border-color: var(--color-accent);
}

.leetcode-heatmap__legend {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.4rem;
  margin-top: var(--space-sm);
  font-size: 1.1rem;
  color: var(--color-text-subtle);
}

.leetcode-heatmap__level {
  width: 11px;
  height: 11px;
  border-radius: 2px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
}

.leetcode-heatmap__level[data-level="1"] {
  background: rgba(99, 91, 255, 0.25);
}

.leetcode-heatmap__level[data-level="2"] {
  background: rgba(99, 91, 255, 0.45);
}

.leetcode-heatmap__level[data-level="3"] {
  background: rgba(99, 91, 255, 0.7);
}

.github__profile {
  padding: var(--space-md);
  background: var(--glass-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.github__bio {
  font-size: 1.4rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

.btn--full {
  width: 100%;
}

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

.github__avatar {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  border: 2px solid var(--color-border);
}

.github__username {
  font-size: 2rem;
  font-weight: 700;
}

.github__handle {
  font-family: var(--font-mono);
  font-size: 1.3rem;
  color: var(--color-text-muted);
}

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

.github__stat {
  text-align: center;
  padding: var(--space-md);
  background: var(--color-surface);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
}

.github__stat-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.2;
}

.github__stat-value--loading {
  color: var(--color-text-subtle);
  font-size: 1.4rem;
}

.github__stat-label {
  font-size: 1.1rem;
  color: var(--color-text-subtle);
  margin-top: 0.3rem;
}

.github__stat-value--mono {
  font-family: var(--font-mono);
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--color-accent);
}

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

.github__repo {
  padding: var(--space-sm) var(--space-md);
  background: var(--glass-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition-base), transform var(--transition-base);
}

.github__repo:hover {
  border-color: var(--color-border-accent);
}

.github__repo-name {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: 0.4rem;
}

.github__repo-desc {
  font-size: 1.4rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
  line-height: 1.6;
}

.github__repo-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  align-items: center;
}

.github__repo-lang {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 1.2rem;
  color: var(--color-text-subtle);
}

.github__repo-lang::before {
  content: '';
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-accent);
}

.github__tech-cloud {
  margin-top: var(--space-md);
  padding: var(--space-sm) var(--space-md);
  background: var(--glass-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.github__tech-cloud h3 {
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: var(--space-sm);
  color: var(--color-text-muted);
}

.github__tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

@media (min-width: 900px) {
  .github__layout {
    grid-template-columns: 1fr 1.4fr;
  }
}

/* ===== SKILLS ===== */
.skills__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
  margin-top: var(--space-xl);
}

.skill-group {
  padding: var(--space-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition-base), transform var(--transition-base);
}

.skill-group:hover {
  border-color: var(--color-border-accent);
}

.skill-group__title {
  font-family: var(--font-mono);
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-md);
}

.skill-group__items {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

@media (min-width: 600px) {
  .skills__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .skills__grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ===== PHILOSOPHY ===== */
.philosophy__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
  margin-top: var(--space-xl);
}

.philosophy-card {
  padding: var(--space-lg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  transition: border-color var(--transition-base);
}

.philosophy-card:hover {
  border-color: var(--color-border-accent);
}

.philosophy-card__title {
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 0.6rem;
}

.philosophy-card__text {
  font-size: 1.4rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

@media (min-width: 768px) {
  .philosophy__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .philosophy__grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* ===== AI SECTION ===== */
.ai-section {
  background: linear-gradient(135deg, rgba(99, 91, 255, 0.06), rgba(0, 112, 243, 0.04));
  border-block: 1px solid var(--color-border);
}

.ai-section__content {
  max-width: 720px;
  margin-top: var(--space-md);
}

.ai-section__content p {
  font-size: 1.7rem;
  color: var(--color-text-muted);
  line-height: 1.8;
  margin-bottom: var(--space-md);
}

.ai-section__pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: var(--space-lg);
}

/* ===== FOCUS ===== */
.focus__pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: var(--space-lg);
}

.focus__pill {
  padding: 0.8rem 1.6rem;
  font-size: 1.4rem;
  font-weight: 500;
  background: var(--glass-bg);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  transition: all var(--transition-base);
}

.focus__pill:hover {
  border-color: var(--color-border-accent);
  background: rgba(99, 91, 255, 0.08);
}

/* ===== CONTACT ===== */
.contact__grid {
  display: grid;
  gap: var(--space-xl);
  margin-top: var(--space-xl);
}

.contact__links {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.contact__link-item {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-base), transform var(--transition-base);
}

.contact__link-item:hover {
  border-color: var(--color-border-accent);
}

.contact__link-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(99, 91, 255, 0.12);
  border-radius: var(--radius-sm);
  color: var(--color-accent);
}

.contact__link-icon svg {
  width: 20px;
  height: 20px;
}

.contact__link-label {
  font-size: 1.2rem;
  color: var(--color-text-subtle);
}

.contact__link-value {
  font-size: 1.5rem;
  font-weight: 600;
}

.contact__form {
  padding: var(--space-xl);
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
}

.contact__field {
  margin-bottom: var(--space-md);
}

.contact__field label {
  display: block;
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--color-text-muted);
}

.contact__field input,
.contact__field textarea {
  width: 100%;
  padding: 1.2rem 1.4rem;
  font-family: inherit;
  font-size: 1.5rem;
  color: var(--color-text);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition-fast);
}

.contact__field input:focus,
.contact__field textarea:focus {
  outline: none;
  border-color: var(--color-accent);
}

.contact__field textarea {
  resize: vertical;
  min-height: 120px;
}

.contact__submit {
  width: 100%;
  margin-top: var(--space-sm);
}

.contact__feedback {
  margin-top: var(--space-md);
  padding: var(--space-md);
  border-radius: var(--radius-sm);
  font-size: 1.4rem;
  display: none;
}

.contact__feedback--success {
  background: rgba(34, 197, 94, 0.1);
  color: var(--color-success);
  border: 1px solid rgba(34, 197, 94, 0.3);
}

.contact__feedback--error {
  background: rgba(239, 68, 68, 0.1);
  color: var(--color-error);
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.contact__feedback.is-visible {
  display: block;
}

@media (min-width: 900px) {
  .contact__grid {
    grid-template-columns: 1fr 1.2fr;
  }
}

.credentials__more {
  margin-top: var(--space-lg);
}

/* ===== BEYOND ENGINEERING ===== */
.accordion-section {
  padding-block: var(--space-xl);
  border-top: 1px solid var(--color-border);
}

.accordion-section--secondary {
  background: var(--color-bg-elevated);
}

.accordion__trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-lg);
  font-size: 1.8rem;
  font-weight: 600;
  color: var(--color-text-muted);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}

.accordion__trigger:hover {
  color: var(--color-text);
  border-color: var(--color-border-accent);
}

.accordion__trigger[aria-expanded="true"] {
  color: var(--color-text);
  border-color: var(--color-border-accent);
  border-bottom-left-radius: 0;
  border-bottom-right-radius: 0;
}

.accordion__icon {
  width: 20px;
  height: 20px;
  transition: transform var(--transition-base);
}

.accordion__trigger[aria-expanded="true"] .accordion__icon {
  transform: rotate(180deg);
}

.accordion__panel {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows var(--transition-slow);
}

.accordion__panel.is-open {
  grid-template-rows: 1fr;
}

.accordion__panel-inner {
  overflow: hidden;
}

.accordion__content {
  padding: var(--space-lg);
  border: 1px solid var(--color-border);
  border-top: none;
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
  background: var(--color-surface);
}

.accordion__intro {
  font-size: 1.4rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-lg);
}

/* ===== CREDENTIALS MARQUEE ===== */
.credentials-showcase {
  overflow: hidden;
  padding-block: var(--space-2xl);
  border-block: 1px solid var(--color-border);
  background: linear-gradient(180deg, rgba(99, 91, 255, 0.04) 0%, transparent 55%);
}

.credentials-showcase__header {
  margin-bottom: var(--space-lg);
}

.credentials-showcase__marquees {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.marquee {
  overflow: hidden;
  width: 100%;
  mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
}

.marquee__track {
  display: flex;
  width: max-content;
  animation: marquee-scroll 55s linear infinite;
}

.marquee--reverse .marquee__track {
  animation-direction: reverse;
}

.marquee:hover .marquee__track {
  animation-play-state: paused;
}

.marquee__group {
  display: flex;
  gap: var(--space-md);
  padding-inline: calc(var(--space-md) / 2);
}

@keyframes marquee-scroll {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

.cert-card {
  flex: 0 0 auto;
  width: clamp(200px, 28vw, 280px);
  padding: 0;
  text-align: left;
  font: inherit;
  color: inherit;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  cursor: pointer;
  transition: border-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}

.cert-card:hover {
  border-color: var(--color-border-accent);
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25);
}

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

.cert-card__img-wrap {
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--color-surface);
}

.cert-card__img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.cert-card__body {
  padding: var(--space-sm) var(--space-md) var(--space-md);
}

.cert-card__title {
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.35;
  margin-bottom: 0.3rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.cert-card__source {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--color-accent);
}

.credentials-showcase__footer {
  text-align: center;
  padding-bottom: var(--space-md);
}

@media (prefers-reduced-motion: reduce) {
  .marquee__track {
    animation: none;
    flex-wrap: wrap;
    width: 100%;
    justify-content: center;
  }

  .marquee {
    mask-image: none;
    -webkit-mask-image: none;
    overflow: visible;
  }

  .marquee__group[aria-hidden="true"] {
    display: none;
  }

  .credentials-showcase__marquees {
    gap: var(--space-lg);
  }

  .marquee__group {
    flex-wrap: wrap;
    justify-content: center;
  }
}

@media (max-width: 767px) {
  .cert-card {
    width: clamp(180px, 72vw, 240px);
  }
}

/* ===== ACCORDION ===== */
.creative__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--space-md);
}

.creative__item {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
  cursor: pointer;
  transition: transform var(--transition-base);
}

.creative__item:hover {
  border-color: var(--color-border-accent);
}

.creative__item img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
}

/* ===== MODAL ===== */
.modal {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(8px);
  align-items: center;
  justify-content: center;
  padding: var(--space-md);
}

.modal.is-open {
  display: flex;
}

.modal__content {
  position: relative;
  max-width: 90vw;
  max-height: 90vh;
}

.modal__content img {
  max-height: 80vh;
  border-radius: var(--radius-md);
}

.modal__caption {
  text-align: center;
  margin-top: var(--space-md);
  font-size: 1.4rem;
  color: var(--color-text-muted);
}

.modal__close {
  position: absolute;
  top: -40px;
  right: 0;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  font-size: 2rem;
}

.section__cta {
  margin-top: var(--space-xl);
}

/* ===== FOOTER ===== */
.footer {
  padding: var(--space-lg) 0;
  border-top: 1px solid var(--color-border);
}

.footer__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
  text-align: center;
}

.footer__name {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.footer__role {
  font-size: 1.3rem;
  color: var(--color-text-muted);
}

.footer__links {
  display: flex;
  gap: var(--space-md);
  margin-top: 0.4rem;
}

.footer__links a {
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

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

/* ===== MOBILE ===== */
@media (max-width: 767px) {
  .hero {
    min-height: auto;
    padding-top: calc(var(--nav-height) + var(--space-md));
    padding-bottom: var(--space-xl);
  }

  .hero__title {
    font-size: clamp(3rem, 9vw, 4rem);
  }

  .hero__desc {
    font-size: 1.65rem;
  }

  .hero__proof-badge {
    font-size: 1.2rem;
    padding: 0.6rem 1.1rem;
  }

  .btn-group .btn {
    flex: 1 1 calc(50% - 0.4rem);
    min-width: 140px;
  }

  .timeline {
    padding-left: var(--space-md);
  }

  .timeline__item {
    transform: translate3d(-12px, 0, 0);
  }

  .timeline__item:nth-child(even) {
    transform: translate3d(12px, 0, 0);
  }

  .timeline__item::before {
    left: calc(-1 * var(--space-md) - 5px);
  }

  .timeline__item--primary {
    padding: var(--space-lg);
  }

  .timeline__role {
    font-size: 1.8rem;
  }

  .project-card {
    padding: var(--space-lg);
  }

  .case-study {
    padding: var(--space-md);
  }

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

  .contact__form {
    padding: var(--space-lg);
  }

  .nav__mobile .nav__link {
    font-size: 1.8rem;
  }
}

@media (max-width: 374px) {
  .container {
    width: 94%;
  }

  .hero__proof {
    gap: 0.5rem;
  }

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

  .btn-group .btn {
    flex: 1 1 100%;
  }
}