/* ============================================================
   DESIGN SYSTEM — IT Portfolio
   Palette: Blue #1D4ED8 | Red #DC2626 | White #FFFFFF | Black #0F172A
   ============================================================ */

/* ── Google Fonts ── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

/* ── CSS Custom Properties ── */
:root {
  --clr-blue:       #1D4ED8;
  --clr-blue-dark:  #1e3a8a;
  --clr-blue-light: #3B82F6;
  --clr-red:        #DC2626;
  --clr-red-dark:   #b91c1c;
  --clr-white:      #FFFFFF;
  --clr-black:      #0F172A;
  --clr-gray-100:   #F1F5F9;
  --clr-gray-200:   #E2E8F0;
  --clr-gray-400:   #94A3B8;
  --clr-gray-600:   #475569;

  --font-base: 'Inter', sans-serif;
  --fw-light:  300;
  --fw-reg:    400;
  --fw-mid:    500;
  --fw-semi:   600;
  --fw-bold:   700;
  --fw-black:  900;

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  --shadow-sm: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.04);
  --shadow-md: 0 4px 16px rgba(0,0,0,.10);
  --shadow-lg: 0 12px 40px rgba(0,0,0,.14);
  --shadow-blue: 0 4px 20px rgba(29,78,216,.30);
  --shadow-red:  0 4px 20px rgba(220,38,38,.30);

  --nav-h: 68px;
  --transition: 0.25s cubic-bezier(.4,0,.2,1);
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-base);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--clr-black);
  background: var(--clr-white);
  overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
input, textarea, select { font-family: inherit; }

/* ── Layout ── */
.container {
  width: min(1120px, 100% - 2.5rem);
  margin-inline: auto;
}
.section {
  padding-block: 5rem;
}
.section--alt {
  background: var(--clr-gray-100);
}

/* ── Typography ── */
h1, h2, h3, h4 { line-height: 1.15; font-weight: var(--fw-bold); }
h1 { font-size: clamp(2.25rem, 5vw + 1rem, 3.75rem); }
h2 { font-size: clamp(1.75rem, 3vw + 0.5rem, 2.5rem); }
h3 { font-size: 1.25rem; }
.section-title {
  text-align: center;
  margin-bottom: 0.75rem;
}
.section-subtitle {
  text-align: center;
  color: var(--clr-gray-600);
  max-width: 55ch;
  margin-inline: auto;
  margin-bottom: 3rem;
}
.highlight-blue { color: var(--clr-blue); }
.highlight-red  { color: var(--clr-red);  }

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.7rem 1.6rem;
  border-radius: var(--radius-full);
  font-weight: var(--fw-semi);
  font-size: 0.9375rem;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
}
.btn-primary {
  background: var(--clr-blue);
  color: var(--clr-white);
  box-shadow: var(--shadow-blue);
}
.btn-primary:hover {
  background: var(--clr-blue-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(29,78,216,.40);
}
.btn-red {
  background: var(--clr-red);
  color: var(--clr-white);
  box-shadow: var(--shadow-red);
}
.btn-red:hover {
  background: var(--clr-red-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(220,38,38,.40);
}
.btn-outline {
  background: transparent;
  color: var(--clr-blue);
  border: 2px solid var(--clr-blue);
}
.btn-outline:hover {
  background: var(--clr-blue);
  color: var(--clr-white);
  transform: translateY(-2px);
  box-shadow: var(--shadow-blue);
}

/* ── Badge / Tag ── */
.badge {
  display: inline-block;
  padding: 0.25em 0.8em;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: var(--fw-semi);
  letter-spacing: 0.03em;
}
.badge-blue { background: rgba(29,78,216,.12); color: var(--clr-blue); }
.badge-red  { background: rgba(220,38,38,.12);  color: var(--clr-red);  }
.badge-gray { background: var(--clr-gray-200);  color: var(--clr-gray-600); }

/* ══════════════════════════════════
   NAVBAR
══════════════════════════════════ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-h);
  background: rgba(255,255,255,0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--clr-gray-200);
  z-index: 1000;
  transition: box-shadow var(--transition);
}
.navbar.scrolled { box-shadow: var(--shadow-md); }
.navbar__inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}
.navbar__logo {
  font-size: 1.35rem;
  font-weight: var(--fw-black);
  letter-spacing: -0.03em;
}
.navbar__logo span:first-child { color: var(--clr-blue); }
.navbar__logo span:last-child  { color: var(--clr-red); }
.navbar__links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}
.navbar__link {
  padding: 0.45rem 1rem;
  border-radius: var(--radius-full);
  font-weight: var(--fw-mid);
  font-size: 0.9375rem;
  color: var(--clr-gray-600);
  transition: color var(--transition), background var(--transition);
}
.navbar__link:hover { color: var(--clr-blue); background: rgba(29,78,216,.07); }
.navbar__link.active { color: var(--clr-blue); font-weight: var(--fw-semi); background: rgba(29,78,216,.09); }
.navbar__cta {
  background: var(--clr-blue);
  color: var(--clr-white) !important;
  padding: 0.45rem 1.15rem !important;
  border-radius: var(--radius-full);
  font-weight: var(--fw-semi) !important;
  box-shadow: var(--shadow-blue);
}
.navbar__cta:hover { background: var(--clr-blue-dark) !important; transform: translateY(-1px); }

/* Hamburger */
.navbar__hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  padding: 4px;
  border-radius: var(--radius-sm);
  transition: background var(--transition);
}
.navbar__hamburger:hover { background: var(--clr-gray-100); }
.navbar__hamburger span {
  display: block;
  height: 2px;
  border-radius: 2px;
  background: var(--clr-black);
  transition: transform var(--transition), opacity var(--transition);
}
.navbar__hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.navbar__hamburger.open span:nth-child(2) { opacity: 0; }
.navbar__hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile nav */
@media (max-width: 768px) {
  .navbar__hamburger { display: flex; }
  .navbar__links {
    position: fixed;
    top: var(--nav-h);
    left: 0; right: 0;
    background: var(--clr-white);
    border-bottom: 1px solid var(--clr-gray-200);
    flex-direction: column;
    align-items: stretch;
    padding: 1rem 1.25rem;
    gap: 0.25rem;
    box-shadow: var(--shadow-md);
    transform: translateY(-110%);
    transition: transform 0.3s cubic-bezier(.4,0,.2,1);
    pointer-events: none;
  }
  .navbar__links.open { transform: translateY(0); pointer-events: auto; }
  .navbar__link { padding: 0.65rem 1rem; border-radius: var(--radius-md); }
  .navbar__cta { text-align: center; margin-top: 0.5rem; }
}

/* ══════════════════════════════════
   FOOTER
══════════════════════════════════ */
.footer {
  background: var(--clr-black);
  color: var(--clr-gray-400);
  padding-block: 3rem 1.75rem;
}
.footer__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem 3rem;
  margin-bottom: 2.5rem;
}
.footer__brand { grid-column: 1 / -1; }
.footer__logo {
  font-size: 1.5rem;
  font-weight: var(--fw-black);
  margin-bottom: 0.6rem;
}
.footer__logo span:first-child { color: var(--clr-blue-light); }
.footer__logo span:last-child  { color: var(--clr-red); }
.footer__tagline { font-size: 0.9rem; max-width: 38ch; }
.footer__col h4 {
  color: var(--clr-white);
  font-size: 0.875rem;
  font-weight: var(--fw-semi);
  margin-bottom: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.footer__col ul { display: flex; flex-direction: column; gap: 0.5rem; }
.footer__col a {
  font-size: 0.9rem;
  transition: color var(--transition);
}
.footer__col a:hover { color: var(--clr-white); }
.footer__socials {
  display: flex;
  gap: 0.75rem;
  margin-top: 1rem;
}
.footer__social-link {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,.07);
  display: grid;
  place-items: center;
  transition: background var(--transition), color var(--transition);
  font-size: 1rem;
}
.footer__social-link:hover { background: var(--clr-blue); color: var(--clr-white); }
.footer__bottom {
  border-top: 1px solid rgba(255,255,255,.08);
  padding-top: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-size: 0.85rem;
}
.footer__bottom a { transition: color var(--transition); }
.footer__bottom a:hover { color: var(--clr-white); }

@media (min-width: 600px) {
  .footer__inner { grid-template-columns: 2fr 1fr 1fr; }
  .footer__brand { grid-column: auto; }
}

/* ══════════════════════════════════
   HERO
══════════════════════════════════ */
.hero {
  min-height: 100svh;
  display: flex;
  align-items: center;
  padding-top: var(--nav-h);
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, #f0f5ff 0%, #ffffff 60%, #fff5f5 100%);
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 70% 40%, rgba(29,78,216,.08) 0%, transparent 70%),
    radial-gradient(ellipse 40% 35% at 20% 70%, rgba(220,38,38,.06) 0%, transparent 60%);
  pointer-events: none;
}
.hero__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  align-items: center;
  padding-block: 5rem;
}
.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 1rem;
  border-radius: var(--radius-full);
  background: rgba(29,78,216,.10);
  color: var(--clr-blue);
  font-size: 0.85rem;
  font-weight: var(--fw-semi);
  margin-bottom: 1.5rem;
  border: 1px solid rgba(29,78,216,.15);
}
.hero__badge-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--clr-blue);
  animation: pulse-dot 2s ease-in-out infinite;
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: .5; transform: scale(1.4); }
}
.hero__title { margin-bottom: 1.25rem; }
.hero__title .name {
  display: block;
  background: linear-gradient(135deg, var(--clr-blue), var(--clr-blue-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero__description {
  font-size: 1.125rem;
  color: var(--clr-gray-600);
  max-width: 52ch;
  margin-bottom: 2.25rem;
  line-height: 1.75;
}
.hero__actions { display: flex; flex-wrap: wrap; gap: 1rem; margin-bottom: 3rem; }
.hero__skills-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}
.hero__skills-strip .badge {
  font-size: 0.8125rem;
  padding: 0.35em 0.9em;
}
.hero__visual {
  display: flex;
  justify-content: center;
}
.hero__card {
  background: var(--clr-white);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--clr-gray-200);
  max-width: 400px;
  width: 100%;
  animation: float 5s ease-in-out infinite;
}
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-10px); }
}
.hero__card-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--clr-gray-200);
}
.hero__avatar {
  width: 52px; height: 52px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--clr-blue), var(--clr-blue-light));
  display: grid;
  place-items: center;
  font-size: 1.5rem;
  color: var(--clr-white);
  flex-shrink: 0;
}
.hero__card-name { font-weight: var(--fw-bold); font-size: 1.05rem; }
.hero__card-role { font-size: 0.82rem; color: var(--clr-gray-600); }
.hero__stat-list { display: flex; flex-direction: column; gap: 0.85rem; }
.hero__stat { display: flex; align-items: center; gap: 0.75rem; }
.hero__stat-icon {
  width: 36px; height: 36px;
  border-radius: var(--radius-sm);
  display: grid;
  place-items: center;
  font-size: 1rem;
  flex-shrink: 0;
}
.hero__stat-icon.blue { background: rgba(29,78,216,.12); }
.hero__stat-icon.red  { background: rgba(220,38,38,.12);  }
.hero__stat-icon.gray { background: var(--clr-gray-100);  }
.hero__stat-label { font-size: 0.875rem; font-weight: var(--fw-mid); }
.hero__stat-sub   { font-size: 0.75rem; color: var(--clr-gray-600); }

@media (min-width: 900px) {
  .hero__inner { grid-template-columns: 1fr 0.9fr; }
}

/* ══════════════════════════════════
   ABOUT PAGE
══════════════════════════════════ */
.about-hero {
  padding-top: calc(var(--nav-h) + 4rem);
  padding-bottom: 2rem;
  text-align: center;
}
.about-bio {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  align-items: center;
}
.about-bio__avatar {
  width: 160px; height: 160px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--clr-blue), var(--clr-blue-light));
  display: grid;
  place-items: center;
  font-size: 4rem;
  color: var(--clr-white);
  margin-inline: auto;
  box-shadow: var(--shadow-blue);
  flex-shrink: 0;
}
.about-bio__text h2 { margin-bottom: 1rem; }
.about-bio__text p { color: var(--clr-gray-600); line-height: 1.8; margin-bottom: 1rem; }
.about-bio__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-top: 1.5rem;
}
@media (min-width: 768px) {
  .about-bio { grid-template-columns: auto 1fr; }
  .about-bio__avatar { margin-inline: 0; }
}

/* Skills grid */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.5rem;
}
.skill-card {
  background: var(--clr-white);
  border: 1px solid var(--clr-gray-200);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  position: relative;
  overflow: hidden;
}
.skill-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--clr-blue), var(--clr-blue-light));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}
.skill-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--clr-blue-light); }
.skill-card:hover::before { transform: scaleX(1); }
.skill-card__icon {
  font-size: 2.25rem;
  margin-bottom: 1rem;
  display: block;
}
.skill-card__title { font-size: 1.1rem; font-weight: var(--fw-bold); margin-bottom: 0.5rem; }
.skill-card__desc { font-size: 0.9rem; color: var(--clr-gray-600); line-height: 1.7; margin-bottom: 1rem; }
.skill-card__tags { display: flex; flex-wrap: wrap; gap: 0.4rem; }

/* ══════════════════════════════════
   PROJECTS PAGE
══════════════════════════════════ */
.projects-hero {
  padding-top: calc(var(--nav-h) + 4rem);
  padding-bottom: 2rem;
  text-align: center;
}
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.75rem;
}
.project-card {
  background: var(--clr-white);
  border: 1px solid var(--clr-gray-200);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition), box-shadow var(--transition);
}
.project-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); }
.project-card__banner {
  height: 160px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3.5rem;
}
.project-card__banner.blue { background: linear-gradient(135deg, #dbeafe, #eff6ff); }
.project-card__banner.red  { background: linear-gradient(135deg, #fee2e2, #fff5f5); }
.project-card__banner.dark { background: linear-gradient(135deg, #1e293b, #0f172a); }
.project-card__banner.gray { background: linear-gradient(135deg, #f1f5f9, #e2e8f0); }
.project-card__body { padding: 1.5rem; flex: 1; display: flex; flex-direction: column; }
.project-card__tags { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-bottom: 0.85rem; }
.project-card__title { font-size: 1.1rem; font-weight: var(--fw-bold); margin-bottom: 0.6rem; }
.project-card__desc  { font-size: 0.9rem; color: var(--clr-gray-600); line-height: 1.7; flex: 1; margin-bottom: 1.25rem; }
.project-card__links { display: flex; gap: 0.75rem; }
.project-card__link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.875rem;
  font-weight: var(--fw-semi);
  color: var(--clr-blue);
  padding: 0.35rem 0;
  border-bottom: 2px solid transparent;
  transition: border-color var(--transition);
}
.project-card__link:hover { border-color: var(--clr-blue); }

/* ══════════════════════════════════
   CONTACT PAGE
══════════════════════════════════ */
.contact-hero {
  padding-top: calc(var(--nav-h) + 4rem);
  padding-bottom: 2rem;
  text-align: center;
}
.contact-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  align-items: start;
}
@media (min-width: 768px) {
  .contact-layout { grid-template-columns: 1fr 1.4fr; }
}
.contact-info { display: flex; flex-direction: column; gap: 1.25rem; }
.contact-info-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1.25rem;
  border: 1px solid var(--clr-gray-200);
  border-radius: var(--radius-md);
  background: var(--clr-white);
  transition: box-shadow var(--transition), border-color var(--transition);
}
.contact-info-item:hover { box-shadow: var(--shadow-sm); border-color: var(--clr-blue-light); }
.contact-info-item__icon {
  width: 44px; height: 44px;
  border-radius: var(--radius-sm);
  background: rgba(29,78,216,.10);
  display: grid;
  place-items: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}
.contact-info-item__label { font-size: 0.78rem; color: var(--clr-gray-400); font-weight: var(--fw-semi); text-transform: uppercase; letter-spacing: 0.05em; }
.contact-info-item__value { font-size: 0.95rem; font-weight: var(--fw-mid); color: var(--clr-black); margin-top: 0.15rem; }

.contact-form {
  background: var(--clr-white);
  border: 1px solid var(--clr-gray-200);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-md);
}
.form-group { margin-bottom: 1.25rem; }
.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: var(--fw-semi);
  color: var(--clr-black);
  margin-bottom: 0.45rem;
}
.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.7rem 1rem;
  border: 1.5px solid var(--clr-gray-200);
  border-radius: var(--radius-md);
  font-size: 0.9375rem;
  color: var(--clr-black);
  background: var(--clr-white);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--clr-blue);
  box-shadow: 0 0 0 3px rgba(29,78,216,.12);
}
.form-group textarea { resize: vertical; min-height: 130px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.form-success {
  display: none;
  text-align: center;
  padding: 2rem;
  color: #16a34a;
  font-weight: var(--fw-semi);
}
.form-success span { font-size: 2.5rem; display: block; margin-bottom: 0.5rem; }

/* ══════════════════════════════════
   PAGE HEADER (generic)
══════════════════════════════════ */
.page-header {
  padding-top: calc(var(--nav-h) + 4rem);
  padding-bottom: 3rem;
  text-align: center;
  background: linear-gradient(135deg, #f0f5ff 0%, #ffffff 100%);
  border-bottom: 1px solid var(--clr-gray-200);
}
.page-header p { color: var(--clr-gray-600); margin-top: 0.75rem; }

/* ══════════════════════════════════
   404 PAGE
══════════════════════════════════ */
.not-found {
  min-height: 100svh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding-top: var(--nav-h);
  background: linear-gradient(135deg, #f0f5ff, #fff);
}
.not-found__code {
  font-size: clamp(6rem, 20vw, 12rem);
  font-weight: var(--fw-black);
  background: linear-gradient(135deg, var(--clr-blue), var(--clr-blue-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 0.5rem;
}
.not-found h2 { font-size: 1.75rem; margin-bottom: 0.75rem; }
.not-found p { color: var(--clr-gray-600); max-width: 40ch; margin-inline: auto; margin-bottom: 2rem; }

/* ══════════════════════════════════
   STAT STRIP (home)
══════════════════════════════════ */
.stat-strip {
  background: var(--clr-black);
  color: var(--clr-white);
  padding-block: 3rem;
}
.stat-strip__inner {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 2rem;
  text-align: center;
}
.stat-strip__num {
  font-size: 2.25rem;
  font-weight: var(--fw-black);
  background: linear-gradient(135deg, var(--clr-blue-light), #93c5fd);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.stat-strip__label { font-size: 0.875rem; color: var(--clr-gray-400); margin-top: 0.25rem; }

/* ══════════════════════════════════
   SCROLL-REVEAL ANIMATION
══════════════════════════════════ */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.6s cubic-bezier(.4,0,.2,1), transform 0.6s cubic-bezier(.4,0,.2,1);
}
.reveal.visible { opacity: 1; transform: none; }
.reveal-delay-1 { transition-delay: 0.10s; }
.reveal-delay-2 { transition-delay: 0.20s; }
.reveal-delay-3 { transition-delay: 0.30s; }
.reveal-delay-4 { transition-delay: 0.40s; }

/* ── Page transition ── */
body { animation: fadeIn .35s ease; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--clr-gray-200); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--clr-blue-light); }