:root {
  --color-bg: #ffffff;
  --color-bg-alt: #f6f7f9;
  --color-bg-card: #ffffff;
  --color-bg-hero: #fafbfd;
  --color-accent: #3d5af1;
  --color-accent-hover: #2c46d4;
  --color-accent-subtle: rgba(61, 90, 241, 0.07);
  --color-accent-text: #3350cc;
  --color-text: #1c2537;
  --color-text-secondary: #475569;
  --color-text-muted: #6b7a8d;
  --color-heading: #0f172a;
  --color-border: #e8eaef;
  --color-border-hover: #d0d4dd;
  --color-shadow: rgba(15, 23, 42, 0.06);
  --color-shadow-md: rgba(15, 23, 42, 0.08);
  --font-display: 'HenriDidot', Georgia, 'Times New Roman', serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 5rem;
  --spacing-3xl: 7rem;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --shadow-xs: 0 1px 2px var(--color-shadow);
  --shadow-sm: 0 2px 8px var(--color-shadow);
  --shadow-md: 0 4px 20px var(--color-shadow-md);
  --shadow-lg: 0 8px 32px var(--color-shadow-md);
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

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

.section-padding {
  padding: var(--spacing-3xl) 0;
}

.container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ── Section header elements ── */
.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2.5px;
  color: var(--color-accent);
  margin-bottom: var(--spacing-sm);
}

.section-label::before {
  content: '';
  width: 20px;
  height: 2px;
  background: var(--color-accent);
  border-radius: 1px;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.875rem, 4.5vw, 2.75rem);
  font-weight: 400;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--color-heading);
  margin-bottom: var(--spacing-sm);
}

.section-subtitle {
  font-size: 1.0625rem;
  line-height: 1.7;
  color: var(--color-text-secondary);
  max-width: 560px;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  line-height: 1;
}

.btn-primary {
  background: var(--color-accent);
  color: #fff;
  box-shadow: 0 2px 8px rgba(61, 90, 241, 0.25);
}

.btn-primary:hover {
  background: var(--color-accent-hover);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(61, 90, 241, 0.3);
}

.btn-outline {
  background: transparent;
  color: var(--color-text);
  border: 1.5px solid var(--color-border);
}

.btn-outline:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background: var(--color-accent-subtle);
}

/* ══════════════════════════════════════
   NAVIGATION
   ══════════════════════════════════════ */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 14px 0;
  transition: all var(--transition);
  background: rgba(255, 255, 255, 0.6);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.site-nav.scrolled {
  background: rgba(255, 255, 255, 0.92);
  padding: 10px 0;
  box-shadow: 0 1px 0 var(--color-border);
}

.site-nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-nav__logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.site-nav__logo img {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  object-fit: cover;
}

.site-nav__logo-text {
  font-family: var(--font-display);
  font-size: 1.0625rem;
  color: var(--color-heading);
  letter-spacing: 0.3px;
}

.site-nav__links {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
}

.site-nav__links a {
  display: block;
  padding: 7px 14px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  border-radius: 6px;
  transition: all var(--transition);
}

.site-nav__links a:hover,
.site-nav__links a.active {
  color: var(--color-text);
  background: var(--color-bg-alt);
}

.site-nav__cta {
  padding: 8px 20px !important;
  font-weight: 600 !important;
  background: var(--color-accent);
  color: #fff !important;
  border-radius: 6px;
}

.site-nav__cta:hover {
  background: var(--color-accent-hover) !important;
  color: #fff !important;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--color-text);
  font-size: 1.375rem;
  cursor: pointer;
  padding: 8px;
}

/* ══════════════════════════════════════
   HERO
   ══════════════════════════════════════ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--color-bg-hero);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(61, 90, 241, 0.04) 0%, transparent 70%);
  pointer-events: none;
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-2xl);
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero__content {
  padding: var(--spacing-2xl) 0;
}

.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: var(--color-accent-subtle);
  border: 1px solid rgba(61, 90, 241, 0.12);
  border-radius: 100px;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: var(--spacing-lg);
}

.hero__title {
  font-family: var(--font-display);
  font-size: clamp(2.25rem, 5vw, 3.5rem);
  font-weight: 400;
  line-height: 1.12;
  letter-spacing: -0.01em;
  color: var(--color-heading);
  margin-bottom: var(--spacing-md);
}

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

.hero__description {
  font-size: 1.0625rem;
  line-height: 1.75;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-xl);
  max-width: 480px;
}

.hero__actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.hero__image {
  display: flex;
  justify-content: center;
  align-items: flex-end;
  position: relative;
}

.hero__image-wrapper {
  position: relative;
  width: 100%;
  max-width: 420px;
}

.hero__image-wrapper img {
  width: 100%;
  height: auto;
  position: relative;
  z-index: 2;
}

.hero__image-wrapper::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 80%;
  height: 55%;
  background: linear-gradient(180deg, transparent 0%, var(--color-accent-subtle) 100%);
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
  z-index: 1;
}

.hero__logos {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-top: var(--spacing-md);
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--color-border);
}

.hero__logos-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  white-space: nowrap;
}

.hero__logos-grid {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.hero__logos-grid .logo-item {
  width: 44px;
  height: 44px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 5px;
  transition: all var(--transition);
}

.hero__logos-grid .logo-item:hover {
  border-color: var(--color-border-hover);
  box-shadow: var(--shadow-sm);
  transform: translateY(-1px);
}

.hero__logos-grid .logo-item img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: 3px;
}

/* ══════════════════════════════════════
   ABOUT
   ══════════════════════════════════════ */
.about {
  background: var(--color-bg);
}

.about .container {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: var(--spacing-3xl);
  align-items: center;
}

.about__image-frame {
  width: 220px;
  height: 220px;
  border-radius: 50%;
  overflow: hidden;
  border: 4px solid var(--color-bg-alt);
  box-shadow: var(--shadow-md);
  margin: 0 auto;
}

.about__image-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.about__stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-xl);
}

.about__stat {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  text-align: center;
}

.about__stat-number {
  font-family: var(--font-display);
  font-size: 1.75rem;
  color: var(--color-accent);
  line-height: 1.1;
  margin-bottom: 4px;
}

.about__stat-label {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.about__text p {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-sm);
}

.about__highlight {
  background: var(--color-bg-alt);
  border-left: 3px solid var(--color-accent);
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin-top: var(--spacing-md);
}

.about__highlight p {
  font-size: 1rem;
  font-style: italic;
  color: var(--color-text-secondary);
  margin-bottom: 0;
}

.about__highlight strong {
  color: var(--color-heading);
  font-style: normal;
}

/* ══════════════════════════════════════
   VENTURES
   ══════════════════════════════════════ */
.ventures {
  background: var(--color-bg-alt);
}

.ventures__header {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
}

.ventures__header .section-subtitle {
  margin: 0 auto;
}

.ventures__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--spacing-md);
}

.venture-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  transition: all var(--transition);
  position: relative;
}

.venture-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--color-accent);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  opacity: 0;
  transition: opacity var(--transition);
}

.venture-card:hover {
  border-color: var(--color-border-hover);
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

.venture-card:hover::after {
  opacity: 1;
}

.venture-card__icon {
  width: 44px;
  height: 44px;
  background: var(--color-accent-subtle);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-md);
  color: var(--color-accent);
  font-size: 1.125rem;
}

.venture-card__title {
  font-family: var(--font-display);
  font-size: 1.375rem;
  color: var(--color-heading);
  margin-bottom: var(--spacing-xs);
  line-height: 1.25;
}

.venture-card__text {
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--color-text-secondary);
}

/* ══════════════════════════════════════
   SKILLS
   ══════════════════════════════════════ */
.skills {
  background: var(--color-bg);
}

.skills .container {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: var(--spacing-3xl);
  align-items: start;
}

.skills__list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.skill-item {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  transition: all var(--transition);
}

.skill-item:hover {
  border-color: var(--color-border-hover);
  box-shadow: var(--shadow-sm);
}

.skill-item__icon {
  width: 40px;
  height: 40px;
  min-width: 40px;
  background: var(--color-accent-subtle);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
  font-size: 1rem;
}

.skill-item__content h3 {
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-heading);
  margin-bottom: 3px;
}

.skill-item__content p {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.65;
  margin-bottom: 0;
}

/* ══════════════════════════════════════
   MILESTONES
   ══════════════════════════════════════ */
.milestones-section {
  background: var(--color-bg-alt);
}

.milestones-section__header {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
}

.milestones-section__header .section-subtitle {
  margin: 0 auto;
}

.milestones-section__layout {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: var(--spacing-2xl);
  align-items: start;
}

.timeline {
  position: relative;
  padding-left: 36px;
}

.timeline::before {
  content: '';
  position: absolute;
  top: 0;
  left: 10px;
  bottom: 0;
  width: 2px;
  background: var(--color-border);
}

.timeline-item {
  position: relative;
  padding-bottom: var(--spacing-md);
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -30px;
  top: 5px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-bg-alt);
  border: 2px solid var(--color-accent);
  z-index: 1;
}

.timeline-item--current::before {
  background: var(--color-accent);
  box-shadow: 0 0 0 4px var(--color-accent-subtle);
}

.timeline-item__year {
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--color-accent);
  margin-bottom: 4px;
  letter-spacing: 0.5px;
}

.timeline-item__text {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.timeline-item__text a {
  text-decoration: underline;
  text-underline-offset: 2px;
  text-decoration-color: rgba(61, 90, 241, 0.3);
}

.timeline-item__text a:hover {
  text-decoration-color: var(--color-accent);
}

.milestones-section__sidebar {
  position: sticky;
  top: 90px;
}

.milestones-section__stats {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
}

.milestones-section__stats-title {
  font-family: var(--font-display);
  font-size: 1.125rem;
  color: var(--color-heading);
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-sm);
  border-bottom: 1px solid var(--color-border);
}

.stat-row {
  display: flex;
  align-items: baseline;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) 0;
  border-bottom: 1px solid var(--color-border);
}

.stat-row:last-child {
  border-bottom: none;
}

.stat-row__number {
  font-family: var(--font-display);
  font-size: 2rem;
  color: var(--color-accent);
  line-height: 1;
  min-width: 72px;
}

.stat-row__label {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

.milestones-section__image {
  margin-top: var(--spacing-md);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  background: var(--color-bg);
}

.milestones-section__image img {
  width: 100%;
}

/* ══════════════════════════════════════
   PUBLICATION
   ══════════════════════════════════════ */
.publication {
  background: var(--color-bg);
}

.publication__card {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-2xl);
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--spacing-lg);
  align-items: start;
}

.publication__icon {
  width: 56px;
  height: 56px;
  background: var(--color-accent-subtle);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
  font-size: 1.5rem;
}

.publication__meta {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: var(--spacing-xs);
}

.publication__title {
  font-family: var(--font-display);
  font-size: 1.375rem;
  color: var(--color-heading);
  margin-bottom: var(--spacing-sm);
  line-height: 1.3;
}

.publication__text {
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-md);
}

.publication__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  font-size: 0.9375rem;
  color: var(--color-accent);
  transition: gap var(--transition);
}

.publication__link:hover {
  gap: 10px;
}

/* ══════════════════════════════════════
   CONTACT
   ══════════════════════════════════════ */
.contact {
  background: var(--color-bg-alt);
}

.contact .container {
  text-align: center;
}

.contact__header {
  margin-bottom: var(--spacing-2xl);
}

.contact__header .section-subtitle {
  margin: 0 auto;
}

.contact__email {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-sm) var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
  transition: all var(--transition);
}

.contact__email:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-sm);
}

.contact__email i {
  color: var(--color-accent);
  font-size: 1.125rem;
}

.contact__email span {
  font-size: 1.0625rem;
  font-weight: 500;
  color: var(--color-heading);
}

.contact__socials {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: var(--spacing-xl);
}

.social-link {
  width: 48px;
  height: 48px;
  border: 1.5px solid var(--color-border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-secondary);
  font-size: 1.125rem;
  transition: all var(--transition);
}

.social-link:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background: var(--color-accent-subtle);
  transform: translateY(-2px);
}

.social-link svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
}

.contact__qr-wrapper {
  display: inline-block;
  background: var(--color-bg-card);
  border-radius: var(--radius-md);
  padding: 14px;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.contact__qr-wrapper img {
  width: 110px;
  height: 110px;
  margin: 0 auto;
}

.contact__qr-label {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  margin-top: var(--spacing-sm);
}

/* ══════════════════════════════════════
   FOOTER
   ══════════════════════════════════════ */
.site-footer {
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-lg) 0;
}

.site-footer .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-lg);
  flex-wrap: wrap;
}

.site-footer__brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.site-footer__brand img {
  width: 32px;
  height: 32px;
  border-radius: 50%;
}

.site-footer__brand-name {
  font-family: var(--font-display);
  font-size: 0.875rem;
  color: var(--color-heading);
}

.site-footer__links {
  display: flex;
  gap: var(--spacing-lg);
  list-style: none;
  flex-wrap: wrap;
}

.site-footer__links a {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  transition: color var(--transition);
}

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

.site-footer__copy {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  text-align: right;
}

.site-footer__copy a {
  color: var(--color-text-secondary);
}

/* ══════════════════════════════════════
   BACK TO TOP
   ══════════════════════════════════════ */
.back-to-top {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 44px;
  height: 44px;
  background: var(--color-accent);
  color: #fff;
  border: none;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition);
  z-index: 100;
  box-shadow: var(--shadow-md);
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(61, 90, 241, 0.35);
}

/* ══════════════════════════════════════
   SCROLL ANIMATIONS (progressive)
   ══════════════════════════════════════ */
.js-ready .fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease-out, transform 0.5s ease-out;
}

.js-ready .fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in-delay-1 { transition-delay: 0.08s; }
.fade-in-delay-2 { transition-delay: 0.16s; }
.fade-in-delay-3 { transition-delay: 0.24s; }
.fade-in-delay-4 { transition-delay: 0.32s; }

/* ══════════════════════════════════════
   RESPONSIVE
   ══════════════════════════════════════ */
@media (max-width: 1024px) {
  .hero .container {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero__content {
    padding-top: 120px;
    order: 1;
  }

  .hero__image { order: 2; }

  .hero__description {
    margin: 0 auto var(--spacing-xl);
  }

  .hero__actions { justify-content: center; }

  .hero__logos {
    justify-content: center;
    flex-direction: column;
    text-align: center;
  }

  .hero__logos-grid { justify-content: center; }

  .hero__image-wrapper { max-width: 320px; }

  .about .container {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .about__highlight { text-align: left; }

  .skills .container { grid-template-columns: 1fr; }

  .milestones-section__layout { grid-template-columns: 1fr; }

  .milestones-section__sidebar { position: static; }

  .publication__card {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .publication__icon { margin: 0 auto; }
}

@media (max-width: 768px) {
  .section-padding {
    padding: var(--spacing-2xl) 0;
  }

  .site-nav__links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: var(--spacing-sm);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
  }

  .site-nav__links.open {
    display: flex;
  }

  .site-nav__links a {
    padding: 12px 16px;
    width: 100%;
    text-align: center;
  }

  .nav-toggle { display: block; }

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

  .site-footer .container {
    flex-direction: column;
    text-align: center;
  }

  .site-footer__links { justify-content: center; }
  .site-footer__copy { text-align: center; }
}

@media (max-width: 480px) {
  .hero__title { font-size: 2rem; }
  .hero__content { padding-top: 100px; }
  .section-title { font-size: 1.625rem; }

  .venture-card { padding: var(--spacing-lg); }

  .btn {
    padding: 11px 22px;
    font-size: 0.875rem;
  }

  .contact__email {
    flex-direction: column;
    gap: 6px;
    padding: var(--spacing-sm) var(--spacing-md);
  }
}