/* ─────────────────────────────────────────────────────────
   TOKENS
───────────────────────────────────────────────────────── */
:root {
  --bg: #0a0a0a;
  --surface: #111111;
  --surface-2: #161616;
  --border: #1e1e1e;
  --border-2: #2a2a2a;
  --text: #e2e2e2;
  --text-muted: #666666;
  --text-dim: #444444;
  --accent: #64ffda;
  --accent-dim: rgba(100, 255, 218, 0.08);
  --accent-border: rgba(100, 255, 218, 0.2);

  --font-sans: 'Space Grotesk', system-ui, sans-serif;
  --font-mono: 'Space Mono', 'Courier New', monospace;

  --nav-h: 64px;
  --radius: 8px;
  --radius-lg: 14px;

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 24px);
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  line-height: 1.7;
  min-height: 100vh;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

/* ─────────────────────────────────────────────────────────
   UTILITIES
───────────────────────────────────────────────────────── */
.container {
  width: min(1100px, 100% - 3rem);
  margin-inline: auto;
}

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

.mono {
  font-family: var(--font-mono);
  font-size: 0.85em;
}

.section {
  padding: 6rem 0;
}

.section-alt {
  background: var(--surface);
}

.section-title {
  font-size: clamp(1.6rem, 3vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 3rem;
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 1rem;
  color: var(--text);
}

.section-title::after {
  content: '';
  display: block;
  height: 1px;
  width: 200px;
  background: var(--border-2);
  flex-shrink: 0;
}

/* ─────────────────────────────────────────────────────────
   SCROLL REVEAL
───────────────────────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.65s var(--ease-out), transform 0.65s var(--ease-out);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ─────────────────────────────────────────────────────────
   BUTTONS
───────────────────────────────────────────────────────── */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  border: 1px solid var(--accent);
  color: var(--accent);
  background: transparent;
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.05em;
  transition: background 0.2s, color 0.2s, box-shadow 0.2s;
  cursor: pointer;
  text-transform: uppercase;
}

.btn-primary:hover {
  background: var(--accent-dim);
  box-shadow: 0 0 20px rgba(100, 255, 218, 0.12);
}

.btn-primary.btn-large {
  padding: 1rem 2.25rem;
  font-size: 0.88rem;
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.4rem;
  border: 1px solid var(--border-2);
  color: var(--text-muted);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  transition: border-color 0.2s, color 0.2s;
}

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

/* ─────────────────────────────────────────────────────────
   NAV
───────────────────────────────────────────────────────── */
.nav-wrap {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-h);
  background: rgba(10, 10, 10, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow 0.3s;
}

.nav-wrap.scrolled {
  box-shadow: 0 4px 32px rgba(0, 0, 0, 0.4);
}

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

.nav-logo {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.05em;
  padding: 0.4rem 0.6rem;
  border: 1px solid var(--accent-border);
  border-radius: 4px;
  transition: background 0.2s;
}

.nav-logo:hover {
  background: var(--accent-dim);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-links a {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  padding: 0.4rem 0.75rem;
  border-radius: 4px;
  transition: color 0.2s, background 0.2s;
  text-transform: uppercase;
}

.nav-links a:hover {
  color: var(--accent);
  background: var(--accent-dim);
}

.nav-links .nav-cta {
  color: var(--accent);
  border: 1px solid var(--accent-border);
}

.nav-links .nav-cta:hover {
  background: var(--accent-dim);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  min-width: 44px;
  min-height: 44px;
  align-items: center;
  justify-content: center;
}

.nav-toggle span {
  display: block;
  width: 26px;
  height: 2px;
  background: var(--text);
  transition: transform 0.3s, opacity 0.3s;
  transform-origin: center;
}

.nav-toggle.open span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}

.nav-toggle.open span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.nav-toggle.open span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* ─────────────────────────────────────────────────────────
   HERO
───────────────────────────────────────────────────────── */
.hero {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-top: var(--nav-h);
  position: relative;
  overflow: hidden;
}

/* subtle grid background */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 60px 60px;
  opacity: 0.35;
  mask-image: radial-gradient(ellipse 80% 70% at 50% 50%, black 30%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 80% 70% at 50% 50%, black 30%, transparent 100%);
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 3rem;
  position: relative;
  padding: 2.5rem 0 3rem;
}

.hero-greeting {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent);
  letter-spacing: 0.08em;
  margin-bottom: 0.5rem;
  opacity: 0;
  animation: fade-up 0.6s var(--ease-out) 0.2s forwards;
}

.hero-name {
  font-size: clamp(2.4rem, 5vw, 4rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.05;
  color: var(--text);
  margin-bottom: 0.75rem;
  opacity: 0;
  animation: fade-up 0.6s var(--ease-out) 0.35s forwards;
}

.hero-tagline {
  font-size: clamp(0.9rem, 1.8vw, 1rem);
  color: var(--text-muted);
  line-height: 1.6;
  max-width: 480px;
  margin-bottom: 1.5rem;
  opacity: 0;
  animation: fade-up 0.6s var(--ease-out) 0.5s forwards;
}

.hero-links {
  display: flex;
  gap: 1.25rem;
  margin-bottom: 1.5rem;
  opacity: 0;
  animation: fade-up 0.6s var(--ease-out) 0.65s forwards;
}

.icon-link {
  color: var(--text-muted);
  transition: color 0.2s, transform 0.2s;
}

.icon-link:hover {
  color: var(--accent);
  transform: translateY(-2px);
}

.hero-text .btn-primary {
  opacity: 0;
  animation: fade-up 0.6s var(--ease-out) 0.8s forwards;
}

.hero-photo {
  position: relative;
  flex-shrink: 0;
  opacity: 0;
  animation: fade-in 0.8s var(--ease-out) 0.6s forwards;
}

.hero-photo img {
  width: clamp(160px, 15vw, 210px);
  height: clamp(220px, 22vw, 290px);
  object-fit: cover;
  object-position: center top;
  border-radius: 120px;
  border: 2px solid var(--border-2);
  filter: grayscale(20%);
  transition: filter 0.3s;
}

.hero-photo img:hover {
  filter: grayscale(0%);
}

.hero-photo::after {
  content: '';
  position: absolute;
  inset: -6px;
  border-radius: 126px;
  border: 1px solid var(--accent-border);
  animation: spin 12s linear infinite;
  background: conic-gradient(var(--accent) 0deg,
      transparent 60deg,
      transparent 300deg,
      var(--accent) 360deg);
  mask: radial-gradient(farthest-side, transparent calc(100% - 1.5px), black calc(100% - 1.5px));
  -webkit-mask: radial-gradient(farthest-side, transparent calc(100% - 1.5px), black calc(100% - 1.5px));
  opacity: 0.6;
}

.hero-scroll-hint {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  justify-content: center;
}

.scroll-line {
  display: block;
  width: 1px;
  height: 60px;
  background: linear-gradient(to bottom, var(--accent), transparent);
  animation: scroll-line 1.8s ease-in-out infinite;
  opacity: 0.7;
}

/* ─────────────────────────────────────────────────────────
   ABOUT
───────────────────────────────────────────────────────── */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 4rem;
  align-items: start;
}

.about-text {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.85;
}

.about-meta {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  border-left: 1px solid var(--border);
  padding-left: 2rem;
}

.about-meta li {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.meta-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.meta-value {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text);
}

/* ─────────────────────────────────────────────────────────
   PROJECTS
───────────────────────────────────────────────────────── */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-bottom: 2.5rem;
}

.project-card {
  text-decoration: none;
  color: inherit;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transition: border-color 0.25s, transform 0.25s, box-shadow 0.25s;
  position: relative;
  overflow: hidden;
}

.project-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 200px 150px at top left, var(--accent-dim), transparent);
  opacity: 0;
  transition: opacity 0.3s;
  pointer-events: none;
}

.project-card:hover {
  border-color: var(--accent-border);
  transform: translateY(-4px);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.3);
}

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

.project-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
}

.project-folder {
  color: var(--accent);
  opacity: 0.8;
}

.project-gh-links {
  display: flex;
  gap: 0.75rem;
}

.project-gh-link {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  color: var(--text-dim);
  transition: color 0.2s;
  font-family: var(--font-mono);
  font-size: 0.72rem;
}

.project-gh-link:hover {
  color: var(--accent);
}

.link-label {
  font-size: 0.7rem;
}

.project-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.4;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.badge {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  background: var(--accent-dim);
  color: var(--accent);
  border: 1px solid var(--accent-border);
  padding: 0.15rem 0.45rem;
  border-radius: 4px;
  letter-spacing: 0.04em;
  font-weight: 400;
}

.project-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.75;
  flex-grow: 1;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: auto;
}

.project-tags li {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--accent);
  letter-spacing: 0.04em;
}

.project-tags li::before {
  content: '#';
  opacity: 0.5;
}

.projects-more {
  text-align: center;
}

/* ─────────────────────────────────────────────────────────
   SKILLS
───────────────────────────────────────────────────────── */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}

.skill-group {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
}

.skill-group-title {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 1.25rem;
}

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

.skill-tags li {
  font-size: 0.8rem;
  font-family: var(--font-mono);
  background: var(--surface-2);
  border: 1px solid var(--border-2);
  color: var(--text-muted);
  padding: 0.3rem 0.7rem;
  border-radius: 4px;
  transition: border-color 0.2s, color 0.2s, background 0.2s;
}

.skill-tags li:hover {
  border-color: var(--accent-border);
  color: var(--text);
  background: var(--accent-dim);
}

/* ─────────────────────────────────────────────────────────
   CERTIFICATIONS
───────────────────────────────────────────────────────── */
.certs-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.cert-card {
  display: flex;
  flex-direction: column;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color 0.25s, transform 0.25s, box-shadow 0.25s;
  cursor: pointer;
  text-decoration: none;
}

.cert-card:hover {
  border-color: var(--accent-border);
  transform: translateY(-3px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.3);
}

.cert-thumb {
  width: 100%;
  height: 180px;
  overflow: hidden;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.cert-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top;
  transition: transform 0.3s;
}

.cert-card:hover .cert-thumb img {
  transform: scale(1.03);
}

.cert-info {
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  flex-grow: 1;
}

.cert-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.15rem;
  line-height: 1.4;
}

.cert-issuer {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  letter-spacing: 0.03em;
  margin-bottom: 0.75rem;
}

.cert-topics {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-bottom: 0.75rem;
}

.cert-topics li {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-muted);
  background: var(--bg);
  border: 1px solid var(--border-2);
  padding: 0.2rem 0.55rem;
  border-radius: 4px;
  letter-spacing: 0.02em;
}

.cert-link-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--accent);
  opacity: 0;
  transition: opacity 0.2s;
}

.cert-card:hover .cert-link-label {
  opacity: 1;
}

/* ─────────────────────────────────────────────────────────
   EDUCATION
───────────────────────────────────────────────────────── */
.edu-card {
  display: flex;
  align-items: flex-start;
  gap: 2rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  transition: border-color 0.2s;
}

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

.edu-logo {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--accent);
  border: 1px solid var(--accent-border);
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  background: var(--accent-dim);
  letter-spacing: 0.06em;
  flex-shrink: 0;
}

.edu-right {
  flex-grow: 1;
}

.edu-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.edu-institution {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
}

.edu-location {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
}

.edu-degree {
  color: var(--text-muted);
  font-size: 1rem;
  margin-bottom: 1rem;
}

.edu-meta {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
}

.edu-gpa,
.edu-grad {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* ─────────────────────────────────────────────────────────
   CONTACT
───────────────────────────────────────────────────────── */
.contact-inner {
  text-align: center;
  max-width: 600px;
  margin-inline: auto;
}

.contact-overline {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
}

.contact-heading {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  margin-bottom: 1.25rem;
  color: var(--text);
}

.contact-text {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 2.5rem;
}

/* ─────────────────────────────────────────────────────────
   FOOTER
───────────────────────────────────────────────────────── */
.footer {
  border-top: 1px solid var(--border);
  padding: 2rem 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-links {
  display: flex;
  gap: 1.25rem;
}

.footer-links a {
  color: var(--text-dim);
  transition: color 0.2s, transform 0.2s;
}

.footer-links a:hover {
  color: var(--accent);
  transform: translateY(-2px);
}

.footer-copy {
  font-size: 0.78rem;
  color: var(--text-dim);
}

/* ─────────────────────────────────────────────────────────
   ANIMATIONS
───────────────────────────────────────────────────────── */
@keyframes fade-up {
  from {
    opacity: 0;
    transform: translateY(16px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fade-in {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

@keyframes scroll-line {
  0% {
    transform: scaleY(0);
    transform-origin: top;
    opacity: 1;
  }

  50% {
    transform: scaleY(1);
    transform-origin: top;
    opacity: 1;
  }

  51% {
    transform-origin: bottom;
  }

  100% {
    transform: scaleY(0);
    transform-origin: bottom;
    opacity: 0.3;
  }
}

/* ─────────────────────────────────────────────────────────
   RESPONSIVE — TABLET  (≤ 900px)
───────────────────────────────────────────────────────── */
@media (max-width: 900px) {
  .hero-inner {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 1.5rem;
  }

  /* Show photo centered above text, smaller */
  .hero-photo {
    display: flex;
    justify-content: center;
    order: -1;
  }

  .hero-photo img {
    width: 130px;
    height: 175px;
    border-radius: 80px;
  }

  .hero-photo::after {
    border-radius: 86px;
  }

  .hero-links {
    justify-content: center;
  }

  .hero-text .btn-primary {
    align-self: center;
  }

  .hero-tagline {
    margin-inline: auto;
  }

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

  .about-meta {
    border-left: none;
    border-top: 1px solid var(--border);
    padding-left: 0;
    padding-top: 1.5rem;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 1.5rem;
  }

  .about-meta li {
    min-width: 120px;
  }

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

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

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

/* ─────────────────────────────────────────────────────────
   RESPONSIVE — MOBILE  (≤ 640px)
───────────────────────────────────────────────────────── */
@media (max-width: 640px) {
  .section {
    padding: 3rem 0;
  }

  .section-title {
    font-size: 1.4rem;
    margin-bottom: 2rem;
  }

  .section-title::after {
    width: 50px;
  }

  /* ── Nav: hamburger dropdown ── */
  .nav-toggle {
    display: flex;
  }

  .nav-links {
    display: none;
    position: fixed;
    top: var(--nav-h);
    left: 0;
    right: 0;
    z-index: 99;
    background: #0f0f0f;
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    align-items: stretch;
    padding: 1rem 1.5rem 1.5rem;
    gap: 0.25rem;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links li {
    border-bottom: 1px solid var(--border);
  }

  .nav-links li:last-child {
    border-bottom: none;
  }

  .nav-links a {
    padding: 1rem 1rem;
    font-size: 1rem;
    font-family: var(--font-sans);
    letter-spacing: 0;
    text-transform: none;
    color: var(--text);
    border-radius: var(--radius);
    display: block;
  }

  .nav-links li:last-child {
    margin-top: 0.75rem;
    padding: 0.25rem 0;
  }

  .nav-links .nav-cta {
    text-align: center;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    padding: 0.9rem 1rem;
    border: 1px solid var(--accent-border);
    border-radius: var(--radius);
    color: var(--accent);
  }

  /* ── Hero ── */
  .hero-inner {
    padding: 1.5rem 0 2rem;
    gap: 1rem;
  }

  .hero-photo img {
    width: 110px;
    height: 145px;
    border-radius: 65px;
  }

  .hero-photo::after {
    border-radius: 71px;
  }

  .hero-name {
    font-size: 2rem;
  }

  .hero-tagline {
    font-size: 0.88rem;
  }

  /* ── About ── */
  .about-meta {
    flex-direction: column;
    gap: 1rem;
  }

  /* ── Projects ── */
  .projects-grid {
    grid-template-columns: 1fr;
  }

  .project-card {
    padding: 1.25rem;
  }

  /* Use normal font for tags on mobile — less "code" feel */
  .project-tags li {
    font-family: var(--font-sans);
    font-size: 0.78rem;
  }

  /* ── Skills ── */
  .skill-group {
    padding: 1.25rem;
  }

  .skill-tags li {
    font-family: var(--font-sans);
    font-size: 0.82rem;
  }

  /* ── Certs ── */
  .certs-grid {
    grid-template-columns: 1fr;
  }

  .cert-thumb {
    height: 150px;
  }

  .cert-link-label {
    opacity: 1;
  }

  .cert-title {
    font-size: 0.88rem;
  }

  .cert-issuer {
    font-family: var(--font-sans);
    font-size: 0.78rem;
  }

  /* ── Education ── */
  .edu-card {
    flex-direction: column;
    gap: 1rem;
    padding: 1.5rem;
  }

  .edu-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .edu-meta {
    flex-direction: column;
    gap: 0.5rem;
  }

  .edu-gpa,
  .edu-grad {
    font-family: var(--font-sans);
  }

  /* ── Footer ── */
  .footer-inner {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

}

/* ─────────────────────────────────────────────────────────
   BACK TO TOP
───────────────────────────────────────────────────────── */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 90;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--surface-2);
  border: 1px solid var(--border-2);
  border-radius: 50%;
  color: var(--text-muted);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity 0.3s, visibility 0.3s, transform 0.3s, border-color 0.2s, color 0.2s;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  border-color: var(--accent-border);
  color: var(--accent);
}

/* ─────────────────────────────────────────────────────────
   SELECTION COLOR
───────────────────────────────────────────────────────── */
::selection {
  background: rgba(100, 255, 218, 0.2);
  color: var(--text);
}

/* ─────────────────────────────────────────────────────────
   SCROLLBAR
───────────────────────────────────────────────────────── */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: var(--bg);
}

::-webkit-scrollbar-thumb {
  background: var(--border-2);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-dim);
}