/* ================================================================
   DAUDA YUSUF OLAMILEKAN — PORTFOLIO
   style.css
   ================================================================ */

/* ── GOOGLE FONTS ─────────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400;0,600;0,700;0,800;1,400&family=Source+Sans+Pro:wght@300;400;600;700&display=swap');

/* ── VARIABLES ────────────────────────────────────────────────── */
:root {
  --accent:       #C8703F;
  --accent-light: #E8A872;
  --accent-pale:  #FFF5ED;
  --accent-dark:  #8B4D2A;
  --black:        #1A1A1A;
  --dark:         #2D2D2D;
  --sidebar-bg:   #1E1E1E;
  --bg-light:     #F7F5F3;
  --body-text:    #3D3D3D;
  --muted:        #8A8A8A;
  --rule:         #D9D9D9;
  --white:        #FFFFFF;

  --font-heading: 'Playfair Display', serif;
  --font-body:    'Source Sans Pro', sans-serif;

  --nav-h:        72px;
  --container:    1160px;
  --radius:       6px;
  --transition:   0.3s ease;
}

/* ── RESET & BASE ─────────────────────────────────────────────── */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font-body);
  color: var(--body-text);
  background: var(--bg-light);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { display: block; max-width: 100%; }
a  { text-decoration: none; color: inherit; }
ul { list-style: none; }

/* ── CONTAINER ────────────────────────────────────────────────── */
.container {
  width: 90%;
  max-width: var(--container);
  margin: 0 auto;
}

/* ── SECTION WRAPPER ──────────────────────────────────────────── */
.section { padding: 100px 0; }
.section--dark { background: var(--sidebar-bg); color: var(--white); }
.section--light { background: var(--bg-light); color: var(--body-text); }

/* ── SECTION LABEL (overline) ─────────────────────────────────── */
.section-label {
  font-family: var(--font-body);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}

/* ── SECTION HEADING ──────────────────────────────────────────── */
.section-heading {
  font-family: var(--font-heading);
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 800;
  line-height: 1.15;
  color: inherit;
  margin-bottom: 16px;
}

.section-heading .accent { color: var(--accent); }

.section-subhead {
  font-size: 17px;
  line-height: 1.7;
  color: var(--muted);
  max-width: 560px;
  margin-bottom: 56px;
}

.section--dark .section-subhead { color: #9A9A9A; }

/* ── ACCENT RULE ──────────────────────────────────────────────── */
.accent-rule {
  width: 48px;
  height: 3px;
  background: var(--accent);
  border-radius: 2px;
  margin-bottom: 40px;
}

/* ── FADE-IN ANIMATION ────────────────────────────────────────── */
.fade-in {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}
.fade-in.is-visible {
  opacity: 1;
  transform: translateY(0);
}
.fade-in.delay-1 { transition-delay: 0.1s; }
.fade-in.delay-2 { transition-delay: 0.2s; }
.fade-in.delay-3 { transition-delay: 0.3s; }
.fade-in.delay-4 { transition-delay: 0.4s; }

/* ================================================================
   NAVIGATION
   ================================================================ */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  background: transparent;
  transition: background var(--transition), box-shadow var(--transition), height var(--transition);
}

.nav.scrolled {
  background: rgba(18, 18, 18, 0.97);
  backdrop-filter: blur(12px);
  box-shadow: 0 2px 24px rgba(0,0,0,0.3);
  height: 60px;
}

.nav__inner {
  width: 90%;
  max-width: var(--container);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav__logo {
  font-family: var(--font-heading);
  font-size: 22px;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: 1px;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 36px;
}

.nav__links a {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: rgba(255,255,255,0.75);
  position: relative;
  transition: color var(--transition);
}

.nav__links a::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0;
  width: 0; height: 2px;
  background: var(--accent);
  transition: width var(--transition);
}

.nav__links a:hover,
.nav__links a.active {
  color: var(--white);
}

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

/* Hamburger */
.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
}
.nav__hamburger span {
  display: block;
  width: 24px; height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: var(--transition);
}
.nav__hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__hamburger.open span:nth-child(2) { opacity: 0; }
.nav__hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile nav drawer */
.nav__mobile {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(18,18,18,0.98);
  z-index: 999;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 40px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}
.nav__mobile.open {
  opacity: 1;
  pointer-events: all;
}
.nav__mobile a {
  font-family: var(--font-heading);
  font-size: 28px;
  font-weight: 700;
  color: var(--white);
  transition: color var(--transition);
}
.nav__mobile a:hover { color: var(--accent); }

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

/* dot-grid texture */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, rgba(200,112,63,0.12) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
}

/* accent glow blob */
.hero::after {
  content: '';
  position: absolute;
  top: -200px; right: -200px;
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(200,112,63,0.08) 0%, transparent 70%);
  pointer-events: none;
}

.hero__inner {
  width: 90%;
  max-width: var(--container);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 420px;
  align-items: center;
  gap: 64px;
  padding-top: var(--nav-h);
}

.hero__label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 20px;
}

.hero__name {
  font-family: var(--font-heading);
  font-size: clamp(36px, 6vw, 72px);
  font-weight: 800;
  color: var(--white);
  line-height: 1.08;
  margin-bottom: 8px;
}

.hero__name .accent { color: var(--accent); }

/* animated underline */
.hero__name-line {
  display: block;
  width: 0;
  height: 4px;
  background: var(--accent);
  border-radius: 2px;
  margin: 16px 0 28px;
  animation: expandLine 1s ease 0.6s forwards;
}
@keyframes expandLine {
  to { width: 80px; }
}

.hero__tagline {
  font-size: clamp(14px, 1.8vw, 18px);
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--accent-light);
  margin-bottom: 28px;
}

.hero__bio {
  font-size: 17px;
  line-height: 1.75;
  color: rgba(255,255,255,0.65);
  max-width: 520px;
  margin-bottom: 44px;
}

.hero__ctas {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  cursor: pointer;
  transition: all var(--transition);
  border: 2px solid transparent;
}

.btn--primary {
  background: var(--accent);
  color: var(--white);
}
.btn--primary:hover {
  background: var(--accent-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(200,112,63,0.35);
}

.btn--outline {
  background: transparent;
  color: var(--white);
  border-color: rgba(255,255,255,0.35);
}
.btn--outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}

/* Headshot */
.hero__photo-wrap {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

.hero__photo-ring {
  position: relative;
  width: 360px;
  height: 360px;
  flex-shrink: 0;
}

.hero__photo-ring::before {
  content: '';
  position: absolute;
  inset: -8px;
  border-radius: 50%;
  border: 3px solid var(--accent);
  opacity: 0.6;
  animation: pulse-ring 3s ease-in-out infinite;
}

.hero__photo-ring::after {
  content: '';
  position: absolute;
  inset: -20px;
  border-radius: 50%;
  border: 1px solid rgba(200,112,63,0.2);
}

@keyframes pulse-ring {
  0%, 100% { transform: scale(1); opacity: 0.6; }
  50%       { transform: scale(1.03); opacity: 0.9; }
}

.hero__photo {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
  object-position: center top;
  border: 4px solid var(--accent);
  position: relative;
  z-index: 1;
}

.hero__scroll-hint {
  position: absolute;
  bottom: 36px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: rgba(255,255,255,0.35);
  font-size: 11px;
  letter-spacing: 2px;
  text-transform: uppercase;
  animation: bounce 2s ease-in-out infinite;
}

.hero__scroll-hint svg { opacity: 0.5; }

@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50%       { transform: translateX(-50%) translateY(6px); }
}

/* ================================================================
   ABOUT
   ================================================================ */
.about__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 72px;
  align-items: start;
}

.about__stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 36px;
}

.stat-card {
  background: var(--white);
  border: 1px solid var(--rule);
  border-top: 3px solid var(--accent);
  border-radius: var(--radius);
  padding: 24px 20px;
  text-align: center;
}

.stat-card__number {
  font-family: var(--font-heading);
  font-size: 38px;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 8px;
}

.stat-card__label {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--muted);
  line-height: 1.4;
}

.about__bio {
  font-size: 17px;
  line-height: 1.8;
  color: var(--body-text);
  margin-bottom: 28px;
}

.about__note {
  background: var(--white);
  border-left: 4px solid var(--accent);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 24px 28px;
  margin-top: 8px;
}

.about__note-title {
  font-family: var(--font-heading);
  font-size: 15px;
  font-weight: 700;
  color: var(--accent-dark);
  margin-bottom: 10px;
}

.about__note-text {
  font-size: 15px;
  line-height: 1.75;
  color: var(--body-text);
  font-style: italic;
}

/* ================================================================
   SERVICES
   ================================================================ */
.services__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.service-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius);
  padding: 36px 32px;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius);
  border: 1px solid var(--accent);
  opacity: 0;
  transition: opacity var(--transition);
}

.service-card:hover {
  background: rgba(200,112,63,0.06);
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(0,0,0,0.3);
}

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

.service-card__icon {
  font-size: 36px;
  margin-bottom: 20px;
  display: block;
}

.service-card__title {
  font-family: var(--font-heading);
  font-size: 22px;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 12px;
}

.service-card__desc {
  font-size: 15px;
  line-height: 1.7;
  color: rgba(255,255,255,0.6);
}

.service-card__tag {
  display: inline-block;
  margin-top: 20px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--accent-light);
}

/* ================================================================
   EXPERIENCE
   ================================================================ */
.experience__timeline {
  position: relative;
  padding-left: 36px;
}

.experience__timeline::before {
  content: '';
  position: absolute;
  left: 0; top: 8px; bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent), transparent);
}

.exp-item {
  position: relative;
  margin-bottom: 52px;
}

.exp-item::before {
  content: '';
  position: absolute;
  left: -42px;
  top: 8px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--bg-light);
  box-shadow: 0 0 0 3px rgba(200,112,63,0.25);
}

.exp-item__header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 6px;
}

.exp-item__company {
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--muted);
}

.exp-item__date {
  background: var(--accent);
  color: var(--white);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.5px;
  padding: 4px 10px;
  border-radius: 3px;
  white-space: nowrap;
}

.exp-item__role {
  font-family: var(--font-heading);
  font-size: 22px;
  font-weight: 700;
  color: var(--black);
  margin-bottom: 16px;
}

.exp-item__bullets {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.exp-item__bullets li {
  font-size: 15px;
  line-height: 1.65;
  color: var(--body-text);
  padding-left: 18px;
  position: relative;
}

.exp-item__bullets li::before {
  content: '';
  position: absolute;
  left: 0; top: 9px;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
}

/* ================================================================
   SKILLS
   ================================================================ */
.skills__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}

.skills__panel-title {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 2px solid rgba(200,112,63,0.4);
}

.skills__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.chip {
  display: inline-flex;
  align-items: center;
  padding: 8px 16px;
  border-radius: 100px;
  font-size: 13px;
  font-weight: 600;
  border: 1.5px solid rgba(200,112,63,0.45);
  color: rgba(255,255,255,0.8);
  background: rgba(200,112,63,0.06);
  transition: all var(--transition);
  cursor: default;
}

.chip:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--white);
  transform: translateY(-2px);
}

/* ================================================================
   AI TOOLS & PROJECTS
   ================================================================ */
.projects__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.project-card {
  background: var(--white);
  border-radius: var(--radius);
  border-left: 4px solid var(--accent);
  padding: 32px 28px;
  box-shadow: 0 2px 16px rgba(0,0,0,0.06);
  transition: all var(--transition);
}

.project-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 36px rgba(200,112,63,0.14);
}

.project-card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 14px;
}

.project-card__name {
  font-family: var(--font-heading);
  font-size: 21px;
  font-weight: 700;
  color: var(--black);
}

.project-card__badge {
  background: var(--accent-pale);
  color: var(--accent-dark);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 3px;
}

.project-card__desc {
  font-size: 15px;
  line-height: 1.7;
  color: var(--body-text);
}

/* ================================================================
   VIDEO DEMOS
   ================================================================ */
.demos__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}

.demos__grid .demo-block:nth-child(3):last-child {
  grid-column: 1 / -1;
  max-width: 680px;
  margin-inline: auto;
  width: 100%;
}

.demo-block__title {
  font-family: var(--font-heading);
  font-size: 24px;
  font-weight: 700;
  color: var(--accent-light);
  margin-bottom: 16px;
}

.demo-block__video,
.demo-block__video iframe {
  width: 100%;
  border-radius: var(--radius);
  background: #111;
  outline: 2px solid rgba(200,112,63,0.25);
  display: block;
  aspect-ratio: 16/9;
  object-fit: cover;
}

.demo-block__meta {
  margin-top: 20px;
}

.demo-block__desc-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 6px;
}

.demo-block__desc {
  font-size: 15px;
  line-height: 1.7;
  color: rgba(255,255,255,0.7);
  margin-bottom: 20px;
}

.demo-block__problem {
  background: rgba(200,112,63,0.08);
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 16px 20px;
}

.demo-block__problem-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--accent-light);
  margin-bottom: 6px;
}

.demo-block__problem-text {
  font-size: 15px;
  line-height: 1.7;
  color: rgba(255,255,255,0.7);
}

/* ================================================================
   CERTIFICATIONS
   ================================================================ */
.certs__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
  max-width: 800px;
}

.cert-card {
  background: var(--white);
  border-radius: var(--radius);
  border-top: 4px solid var(--accent);
  padding: 32px 28px;
  box-shadow: 0 2px 16px rgba(0,0,0,0.06);
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: all var(--transition);
}

.cert-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(200,112,63,0.12);
}

.cert-card__icon {
  font-size: 32px;
}

.cert-card__name {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 700;
  color: var(--black);
  line-height: 1.3;
}

.cert-card__org {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--accent);
}

/* ================================================================
   TESTIMONIALS
   ================================================================ */
.testimonials__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.testimonial-card {
  background: rgba(255,255,255,0.04);
  border-left: 4px solid var(--accent);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 36px 32px;
  transition: all var(--transition);
}

.testimonial-card:hover {
  background: rgba(200,112,63,0.06);
}

.testimonial-card__quote-mark {
  font-family: var(--font-heading);
  font-size: 64px;
  color: var(--accent);
  line-height: 0.6;
  margin-bottom: 24px;
  opacity: 0.6;
  display: block;
}

.testimonial-card__text {
  font-size: 16px;
  font-style: italic;
  line-height: 1.8;
  color: rgba(255,255,255,0.75);
  margin-bottom: 28px;
}

.testimonial-card__author {
  font-size: 15px;
  font-weight: 700;
  color: var(--accent-light);
  margin-bottom: 4px;
}

.testimonial-card__role {
  font-size: 13px;
  color: var(--muted);
}

/* ================================================================
   CONTACT
   ================================================================ */
.contact {
  padding: 120px 0;
  text-align: center;
  background: var(--sidebar-bg);
  position: relative;
  overflow: hidden;
}

.contact::before {
  content: '';
  position: absolute;
  bottom: -200px; left: 50%;
  transform: translateX(-50%);
  width: 700px; height: 700px;
  background: radial-gradient(circle, rgba(200,112,63,0.07) 0%, transparent 65%);
  pointer-events: none;
}

.contact .section-heading { color: var(--white); }

.contact__sub {
  font-size: 17px;
  line-height: 1.7;
  color: rgba(255,255,255,0.5);
  max-width: 480px;
  margin: 0 auto 48px;
}

.contact__buttons {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
}

.contact__btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 36px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  transition: all var(--transition);
  border: 2px solid transparent;
}

.contact__btn--email {
  background: var(--accent);
  color: var(--white);
}
.contact__btn--email:hover {
  background: var(--accent-dark);
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(200,112,63,0.35);
}

.contact__btn--linkedin {
  background: transparent;
  border-color: rgba(255,255,255,0.25);
  color: var(--white);
}
.contact__btn--linkedin:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}

/* ================================================================
   FOOTER
   ================================================================ */
.footer {
  background: var(--black);
  padding: 32px 0;
  text-align: center;
  border-top: 1px solid rgba(255,255,255,0.06);
}

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.footer__logo {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 800;
  color: var(--accent);
}

.footer__copy {
  font-size: 13px;
  color: rgba(255,255,255,0.3);
}

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

/* ================================================================
   RESPONSIVE
   ================================================================ */
@media (max-width: 1024px) {
  .hero__inner {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 48px;
  }
  .hero__bio { margin-left: auto; margin-right: auto; }
  .hero__ctas { justify-content: center; }
  .hero__photo-wrap { justify-content: center; }
  .hero__photo-ring { width: 280px; height: 280px; }

  .about__grid { grid-template-columns: 1fr; gap: 48px; }
  .about__stats { grid-template-columns: repeat(4, 1fr); }

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

@media (max-width: 768px) {
  .section { padding: 72px 0; }

  .nav__links { display: none; }
  .nav__hamburger { display: flex; }
  .nav__mobile { display: flex; }

  .hero__inner { padding-top: calc(var(--nav-h) + 20px); }
  .hero__name { font-size: clamp(32px, 10vw, 48px); }

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

  .services__grid { grid-template-columns: 1fr; }
  .projects__grid { grid-template-columns: 1fr; }
  .demos__grid    { grid-template-columns: 1fr; gap: 56px; }
  .certs__grid    { grid-template-columns: 1fr; }
  .testimonials__grid { grid-template-columns: 1fr; }

  .footer__inner { flex-direction: column; text-align: center; }
}

@media (max-width: 480px) {
  .about__stats { grid-template-columns: 1fr 1fr; }
  .stat-card__number { font-size: 30px; }
  .hero__photo-ring { width: 220px; height: 220px; }
  .contact__buttons { flex-direction: column; align-items: stretch; }
  .contact__btn { justify-content: center; }
}