/* ============================================================
   portfolio.css — Himanshu Singhal Personal Portfolio
   Modern, accessible, dark-theme stylesheet
   Author: Himanshu Singhal
   Updated: 2026
   ============================================================ */

/* ----------------------------------------------------------
   CSS Custom Properties (Design Tokens)
   ---------------------------------------------------------- */
:root {
  /* Colours */
  --clr-bg:             #0d1117;
  --clr-surface:        #161b22;
  --clr-surface-2:      #1f2937;
  --clr-border:         #30363d;
  --clr-accent:         #58a6ff;
  --clr-accent-muted:   rgba(88, 166, 255, 0.12);
  --clr-text-primary:   #e6edf3;
  --clr-text-secondary: #8b949e;
  --clr-text-muted:     #6e7681;
  --clr-heading:        #f0f6fc;
  --clr-tag-bg:         #21262d;
  --clr-tag-text:       #79c0ff;
  --clr-card-border:    #21262d;

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;

  /* Spacing scale */
  --sp-xs:  0.5rem;
  --sp-sm:  1rem;
  --sp-md:  1.5rem;
  --sp-lg:  2rem;
  --sp-xl:  3rem;
  --sp-2xl: 4rem;
  --sp-3xl: 6rem;

  /* Layout */
  --max-w:        1100px;
  --max-w-narrow:  700px;

  /* Radii */
  --r-sm:  4px;
  --r-md:  8px;
  --r-lg: 12px;

  /* Motion */
  --ease:      0.2s ease;
  --ease-slow: 0.4s ease;

  /* Shadows */
  --shadow-card:       0 1px 3px rgba(0,0,0,.4), 0 4px 16px rgba(0,0,0,.3);
  --shadow-card-hover: 0 4px 12px rgba(0,0,0,.5), 0 8px 32px rgba(0,0,0,.4);
}

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

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

body {
  background-color: var(--clr-bg);
  color: var(--clr-text-primary);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  /* Remove grey tap-highlight flash on Android Chrome */
  -webkit-tap-highlight-color: transparent;
}

img, svg { display: block; max-width: 100%; }

a {
  color: var(--clr-accent);
  text-decoration: none;
  transition: color var(--ease), opacity var(--ease);
  /* Eliminate 300ms tap delay on mobile */
  touch-action: manipulation;
}
a:hover { opacity: .8; }
a:focus-visible {
  outline: 2px solid var(--clr-accent);
  outline-offset: 3px;
  border-radius: var(--r-sm);
}

ul { list-style: none; }

/* ----------------------------------------------------------
   Accessibility
   ---------------------------------------------------------- */
.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  background: var(--clr-accent);
  color: #000;
  padding: .5rem 1rem;
  font-weight: 600;
  border-radius: var(--r-sm);
  z-index: 9999;
  transition: top var(--ease);
}
.skip-link:focus { top: 1rem; }

/* ----------------------------------------------------------
   Layout utilities
   ---------------------------------------------------------- */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--sp-lg);
}
.container--narrow {
  max-width: var(--max-w-narrow);
  margin: 0 auto;
  padding: 0 var(--sp-lg);
}
.section { padding: var(--sp-3xl) 0; }
.section--alt { background-color: var(--clr-surface); }

.section-header { margin-bottom: var(--sp-2xl); }
.section-label {
  display: block;
  font-family: var(--font-mono);
  font-size: .8rem;
  color: var(--clr-accent);
  letter-spacing: .1em;
  text-transform: uppercase;
  margin-bottom: var(--sp-xs);
}
.section-title {
  font-size: clamp(1.75rem, 4vw, 2.4rem);
  font-weight: 700;
  color: var(--clr-heading);
  line-height: 1.2;
}

/* ----------------------------------------------------------
   Navigation
   ---------------------------------------------------------- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(13, 17, 23, .88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--ease), box-shadow var(--ease);
}
.site-header--scrolled {
  border-color: var(--clr-border);
  box-shadow: 0 4px 20px rgba(0,0,0,.4);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 1.1rem var(--sp-lg);
}

.nav-logo {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--clr-text-primary);
  letter-spacing: -.03em;
}
.nav-logo .accent { color: var(--clr-accent); }

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--sp-md);
}
.nav-link {
  font-size: .875rem;
  font-weight: 500;
  color: var(--clr-text-secondary);
  padding: .4rem 0;
  position: relative;
  transition: color var(--ease);
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 0; height: 2px;
  background: var(--clr-accent);
  transition: width var(--ease);
}
.nav-link:hover,
.nav-link--active { color: var(--clr-text-primary); opacity: 1; }
.nav-link:hover::after,
.nav-link--active::after { width: 100%; }

.nav-link--cta {
  border: 1px solid var(--clr-accent);
  color: var(--clr-accent);
  padding: .4rem 1rem;
  border-radius: var(--r-md);
  margin-left: var(--sp-xs);
}
.nav-link--cta::after { display: none; }
.nav-link--cta:hover { background: var(--clr-accent-muted); color: var(--clr-accent); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav-toggle span {
  display: block;
  width: 24px; height: 2px;
  background: var(--clr-text-primary);
  border-radius: 2px;
  transition: transform var(--ease), opacity var(--ease);
}

/* ----------------------------------------------------------
   Hero
   ---------------------------------------------------------- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 8rem 0 4rem;
}
.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-3xl);
  align-items: center;
}

.hero-greeting {
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--clr-accent);
  margin-bottom: var(--sp-sm);
}
.hero-name {
  font-size: clamp(2.5rem, 7vw, 4.5rem);
  font-weight: 800;
  color: var(--clr-heading);
  line-height: 1.05;
  letter-spacing: -.03em;
  margin-bottom: var(--sp-xs);
}
.hero-title {
  font-size: clamp(1.2rem, 3vw, 1.9rem);
  font-weight: 500;
  color: var(--clr-text-secondary);
  margin-bottom: var(--sp-md);
}
.hero-tagline {
  font-size: 1.0625rem;
  color: var(--clr-text-secondary);
  max-width: 480px;
  line-height: 1.8;
  margin-bottom: var(--sp-xl);
}
.hero-tagline strong { color: var(--clr-text-primary); font-weight: 600; }

.hero-cta {
  display: flex;
  gap: var(--sp-sm);
  flex-wrap: wrap;
  margin-bottom: var(--sp-xl);
}
.hero-social {
  display: flex;
  gap: var(--sp-md);
}
.hero-social a {
  color: var(--clr-text-secondary);
  transition: color var(--ease), transform var(--ease);
}
.hero-social a:hover { color: var(--clr-accent); transform: translateY(-2px); opacity: 1; }

/* Code window */
.code-window {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--r-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}
.code-window__titlebar {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: .85rem 1rem;
  background: var(--clr-surface-2);
  border-bottom: 1px solid var(--clr-border);
}
.dot { width: 12px; height: 12px; border-radius: 50%; }
.dot--red    { background: #ff5f57; }
.dot--yellow { background: #ffbd2e; }
.dot--green  { background: #28c840; }
.code-window__filename {
  font-family: var(--font-mono);
  font-size: .75rem;
  color: var(--clr-text-muted);
  margin-left: var(--sp-xs);
}
.code-window__body {
  padding: 1.25rem 1.5rem;
  overflow-x: auto;
}
.code-window__body code {
  font-family: var(--font-mono);
  font-size: .84rem;
  line-height: 1.9;
  white-space: pre;
  display: block;
}
.code-kw   { color: #ff7b72; }
.code-type { color: #79c0ff; }
.code-fn   { color: #d2a8ff; }
.code-prop { color: #d2a8ff; }
.code-str  { color: #a5d6ff; }

/* ----------------------------------------------------------
   Buttons
   ---------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: .75rem 1.75rem;
  border-radius: var(--r-md);
  font-size: .9375rem;
  font-weight: 600;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: all var(--ease);
  text-decoration: none;
  white-space: nowrap;
  border: 2px solid transparent;
  touch-action: manipulation;
}
.btn--primary {
  background: var(--clr-accent);
  color: #0d1117;
  border-color: var(--clr-accent);
}
.btn--primary:hover { background: transparent; color: var(--clr-accent); opacity: 1; }

.btn--outline {
  background: transparent;
  color: var(--clr-accent);
  border-color: var(--clr-accent);
}
.btn--outline:hover { background: var(--clr-accent-muted); opacity: 1; }

.btn--large { padding: 1rem 2.5rem; font-size: 1rem; }

/* ----------------------------------------------------------
   About
   ---------------------------------------------------------- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--sp-3xl);
  align-items: start;
}
.about-text p {
  color: var(--clr-text-secondary);
  margin-bottom: var(--sp-md);
  font-size: 1.0625rem;
  line-height: 1.85;
}
.about-text p strong { color: var(--clr-text-primary); font-weight: 600; }
.about-text a { color: var(--clr-accent); }

.about-bullets {
  list-style: none;
  padding: 0;
  margin: .25rem 0 1.25rem 0;
  display: flex;
  flex-direction: column;
  gap: .55rem;
}
.about-bullets li {
  position: relative;
  padding-left: 1.5rem;
  color: var(--clr-text-secondary);
  font-size: 1.0625rem;
  line-height: 1.75;
}
.about-bullets li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--clr-accent);
  font-size: .8rem;
  top: .3rem;
}

.about-meta {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-sm);
  margin-top: var(--sp-lg);
  padding-top: var(--sp-lg);
  border-top: 1px solid var(--clr-border);
}
.meta-item { display: flex; flex-direction: column; gap: 2px; }
.meta-label {
  font-family: var(--font-mono);
  font-size: .73rem;
  color: var(--clr-text-muted);
  text-transform: uppercase;
  letter-spacing: .08em;
}
.meta-value { font-size: .9375rem; color: var(--clr-text-primary); }
.meta-value a { color: var(--clr-accent); }

.profile-image-wrapper {
  width: 250px;
  height: 250px;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 2px solid var(--clr-border);
  flex-shrink: 0;
  box-shadow: var(--shadow-card);
}
.profile-image-wrapper img { width: 100%; height: 100%; object-fit: cover; }

/* ----------------------------------------------------------
   Skills
   ---------------------------------------------------------- */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: var(--sp-lg);
}
.skill-category {
  background: var(--clr-surface-2);
  border: 1px solid var(--clr-card-border);
  border-radius: var(--r-lg);
  padding: var(--sp-lg);
  transition: border-color var(--ease), box-shadow var(--ease);
}
.skill-category:hover {
  border-color: var(--clr-accent);
  box-shadow: 0 0 0 1px var(--clr-accent-muted);
}
.skill-category__title {
  font-size: .8125rem;
  font-weight: 600;
  color: var(--clr-accent);
  text-transform: uppercase;
  letter-spacing: .1em;
  margin-bottom: var(--sp-md);
  font-family: var(--font-mono);
}
.skill-tags { display: flex; flex-wrap: wrap; gap: .5rem; }
.skill-tag {
  display: inline-block;
  padding: .3rem .75rem;
  background: var(--clr-tag-bg);
  color: var(--clr-text-secondary);
  border: 1px solid var(--clr-border);
  border-radius: 100px;
  font-size: .8125rem;
  font-weight: 500;
  transition: all var(--ease);
  cursor: default;
}
.skill-tag--primary {
  background: var(--clr-accent-muted);
  color: var(--clr-accent);
  border-color: rgba(88, 166, 255, .3);
}
.skill-tag:hover { border-color: var(--clr-accent); color: var(--clr-accent); }

/* ----------------------------------------------------------
   Experience
   ---------------------------------------------------------- */
.experience-list { display: flex; flex-direction: column; gap: var(--sp-lg); }

.experience-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-card-border);
  border-radius: var(--r-lg);
  padding: var(--sp-xl);
  transition: border-color var(--ease), box-shadow var(--ease), transform var(--ease);
  box-shadow: var(--shadow-card);
}
.experience-card:hover {
  border-color: var(--clr-accent);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-2px);
}
.experience-card--featured { border-left: 3px solid var(--clr-accent); }

.experience-card__header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--sp-md);
  margin-bottom: var(--sp-lg);
}
.experience-card__role {
  font-size: 1.1875rem;
  font-weight: 700;
  color: var(--clr-heading);
  margin-bottom: .25rem;
}
.experience-card__company { font-size: 1rem; font-weight: 500; color: var(--clr-accent); }
.experience-card__location { color: var(--clr-text-muted); font-weight: 400; font-size: .875rem; }
.experience-card__date {
  font-family: var(--font-mono);
  font-size: .8125rem;
  color: var(--clr-text-muted);
  white-space: nowrap;
  padding: .3rem .75rem;
  background: var(--clr-tag-bg);
  border-radius: 100px;
  border: 1px solid var(--clr-border);
  flex-shrink: 0;
}

.experience-card__points {
  display: flex;
  flex-direction: column;
  gap: .75rem;
  margin-bottom: var(--sp-lg);
}
.experience-card__points li {
  position: relative;
  padding-left: 1.5rem;
  color: var(--clr-text-secondary);
  font-size: .9375rem;
  line-height: 1.75;
}
.experience-card__points li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--clr-accent);
  font-size: .8rem;
  top: .26rem;
}
.experience-card__points li strong { color: var(--clr-text-primary); font-weight: 600; }

.experience-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  padding-top: var(--sp-md);
  border-top: 1px solid var(--clr-border);
}
.exp-tag {
  font-family: var(--font-mono);
  font-size: .75rem;
  color: var(--clr-text-muted);
  padding: .2rem .6rem;
  background: var(--clr-tag-bg);
  border-radius: var(--r-sm);
  border: 1px solid var(--clr-border);
}

/* ----------------------------------------------------------
   Achievements
   ---------------------------------------------------------- */
.achievements-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--sp-lg);
}
.achievement-card {
  background: var(--clr-surface-2);
  border: 1px solid var(--clr-card-border);
  border-radius: var(--r-lg);
  padding: var(--sp-xl);
  text-align: center;
  transition: border-color var(--ease), transform var(--ease), box-shadow var(--ease);
}
.achievement-card:hover {
  border-color: var(--clr-accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
}
.achievement-card__icon { font-size: 2rem; margin-bottom: var(--sp-sm); }
.achievement-card__stat {
  font-size: 1.375rem;
  font-weight: 800;
  color: var(--clr-accent);
  margin-bottom: var(--sp-sm);
  line-height: 1.2;
}
.achievement-card__desc {
  font-size: .875rem;
  color: var(--clr-text-secondary);
  line-height: 1.65;
}

/* ----------------------------------------------------------
   Education
   ---------------------------------------------------------- */
.education-card {
  display: flex;
  align-items: center;
  gap: var(--sp-xl);
  background: var(--clr-surface);
  border: 1px solid var(--clr-card-border);
  border-radius: var(--r-lg);
  padding: var(--sp-xl);
  max-width: 700px;
  box-shadow: var(--shadow-card);
}
.education-card__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 60px; height: 60px;
  background: var(--clr-accent-muted);
  border-radius: var(--r-md);
  color: var(--clr-accent);
  flex-shrink: 0;
}
.education-card__degree {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--clr-heading);
  margin-bottom: .4rem;
}
.education-card__institution {
  font-size: .9375rem;
  color: var(--clr-accent);
  margin-bottom: var(--sp-sm);
}
.education-card__meta {
  display: flex;
  gap: var(--sp-sm);
  font-size: .8125rem;
  font-family: var(--font-mono);
  color: var(--clr-text-muted);
  flex-wrap: wrap;
}
.meta-sep { color: var(--clr-border); }

/* ----------------------------------------------------------
   Contact
   ---------------------------------------------------------- */
#contact .container--narrow { text-align: center; }

.contact-intro {
  font-size: 1.0625rem;
  color: var(--clr-text-secondary);
  line-height: 1.8;
  margin-bottom: var(--sp-xl);
}
.contact-social {
  display: flex;
  justify-content: center;
  gap: var(--sp-lg);
  margin-top: var(--sp-xl);
}
.contact-social a {
  color: var(--clr-text-secondary);
  transition: color var(--ease), transform var(--ease);
}
.contact-social a:hover { color: var(--clr-accent); transform: translateY(-3px); opacity: 1; }

/* ----------------------------------------------------------
   Footer
   ---------------------------------------------------------- */
.site-footer {
  border-top: 1px solid var(--clr-border);
  padding: var(--sp-xl) 0;
  text-align: center;
}
.site-footer .container { display: flex; flex-direction: column; align-items: center; gap: var(--sp-xs); }
.site-footer p { font-size: .8125rem; color: var(--clr-text-muted); font-family: var(--font-mono); }
.site-footer a { color: var(--clr-accent); }
.footer-copy { color: var(--clr-text-muted); }

/* ----------------------------------------------------------
   Back to Top
   ---------------------------------------------------------- */
.back-to-top {
  position: fixed;
  bottom: 2rem; right: 2rem;
  width: 44px; height: 44px;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--r-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--clr-text-secondary);
  opacity: 0;
  visibility: hidden;
  transition: all var(--ease);
  z-index: 50;
}
.back-to-top--visible { opacity: 1; visibility: visible; }
.back-to-top:hover { background: var(--clr-accent); color: #0d1117; border-color: var(--clr-accent); opacity: 1; }

/* ----------------------------------------------------------
   Responsive — Tablet (≤ 900px)
   ---------------------------------------------------------- */
@media (max-width: 900px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: var(--sp-2xl);
  }
  /* Keep hero TEXT first — do NOT pull visual above the name */
  .hero-visual { order: 2; }
  .hero-tagline { max-width: 100%; }

  .about-grid { grid-template-columns: 1fr; }
  /* Show photo first in the about section on smaller screens */
  .about-image { order: -1; display: flex; justify-content: center; }
  .profile-image-wrapper { width: 200px; height: 200px; }

  /* Stack header vertically, keep date badge pinned to the start */
  .experience-card__header { flex-direction: column; gap: var(--sp-xs); }
  .experience-card__date { align-self: flex-start; }

  /* 2-column achievement grid at tablet — 1 column only on true mobile */
  .achievements-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ----------------------------------------------------------
   Responsive — Mobile (≤ 768px)
   ---------------------------------------------------------- */
@media (max-width: 768px) {
  /* --- Navigation --- */
  .nav-toggle { display: flex; }

  .nav-menu {
    position: absolute;
    top: 100%; left: 0; right: 0;
    background: var(--clr-surface);
    border-bottom: 1px solid var(--clr-border);
    box-shadow: 0 8px 32px rgba(0, 0, 0, .5);
    flex-direction: column;
    padding: var(--sp-md);
    gap: .25rem;
    transform: translateY(-8px);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--ease), transform var(--ease), visibility var(--ease);
  }
  .nav-menu--open { transform: translateY(0); opacity: 1; visibility: visible; }

  /* Larger tap targets for nav links */
  .nav-link { padding: .7rem .5rem; font-size: .9375rem; }
  .nav-link--cta { width: 100%; text-align: center; padding: .7rem 1rem; margin-left: 0; }

  /* Hamburger animates to an × when menu is open */
  .nav-toggle[aria-expanded="true"] span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }
  .nav-toggle[aria-expanded="true"] span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
  }
  .nav-toggle[aria-expanded="true"] span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  /* --- General spacing --- */
  .section { padding: var(--sp-2xl) 0; }
  .section-header { margin-bottom: var(--sp-lg); }

  /* --- Hero --- */
  /* 100svh respects the iOS Safari address-bar so nothing is clipped;
     100vh is the fallback for older Android browsers */
  .hero { min-height: 100vh; min-height: 100svh; padding: 5.5rem 0 3rem; }
  .hero-cta { flex-direction: column; align-items: stretch; }
  .btn { width: 100%; text-align: center; }

  /* --- Achievements: 1 column on true mobile --- */
  .achievements-grid { grid-template-columns: 1fr; }

  /* --- Education --- */
  .education-card { flex-direction: column; text-align: center; }
  .education-card__meta { justify-content: center; }

  /* --- About --- */
  .about-meta { grid-template-columns: 1fr; }

  /* --- Containers --- */
  .container,
  .container--narrow { padding: 0 var(--sp-sm); }
}

/* ----------------------------------------------------------
   Responsive — Small phones (≤ 480px)
   ---------------------------------------------------------- */
@media (max-width: 480px) {
  /* Tighten the spacing scale */
  :root {
    --sp-xl:  2rem;
    --sp-2xl: 3rem;
  }

  /* Typography */
  .hero-name { font-size: 2.1rem; }
  .hero-title { font-size: 1.1rem; }
  .section-title { font-size: 1.5rem; }

  /* Cards */
  .experience-card { padding: var(--sp-md); }
  .achievement-card { padding: var(--sp-md); }

  /* Code window — scrollable horizontally, never expands the page */
  .code-window { max-width: 100%; }
  .code-window__body {
    padding: .875rem 1rem;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
  .code-window__body code { font-size: .75rem; }

  /* Skills — 1 column on very small screens */
  .skills-grid { grid-template-columns: 1fr; }

  /* Social icon tap areas — minimum 44×44 touch target */
  .hero-social a,
  .contact-social a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: .5rem;
    margin: -.5rem;
  }

  /* Back-to-top placement */
  .back-to-top { bottom: 1rem; right: 1rem; }
}

/* ----------------------------------------------------------
   Print
   ---------------------------------------------------------- */
@media print {
  .site-header, .back-to-top, .hero-visual, .nav-toggle { display: none; }
  body { background: white; color: #111; }
  .section--alt { background: #f8f8f8; }
  a { color: currentColor; }
  .experience-card, .achievement-card, .education-card { box-shadow: none; border: 1px solid #ddd; }
}