/* =========================================
   PORTFOLIO — GANGISETTY SAI MUKESH
   style.css — Main Stylesheet
   ========================================= */

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

:root {
  --bg:            #05070f;
  --bg2:           #080c1a;
  --surface:       #0d1225;
  --surface2:      #111829;
  --purple:        #8b5cf6;
  --purple-light:  #a78bfa;
  --cyan:          #22d3ee;
  --cyan-light:    #67e8f9;
  --pink:          #f472b6;
  --text:          #e2e8f0;
  --text-muted:    #94a3b8;
  --text-dim:      #475569;
  --border:        rgba(139,92,246,0.2);
  --border-cyan:   rgba(34,211,238,0.2);
  --font-display:  'Space Grotesk', sans-serif;
  --font-mono:     'Space Mono', monospace;
  --radius-sm:     6px;
  --radius-md:     10px;
  --radius-lg:     14px;
  --radius-xl:     16px;
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-display);
  font-size: 16px;
  line-height: 1.7;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { text-decoration: none; }

/* ---------- Scrollbar ---------- */
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--purple); border-radius: 3px; }

/* ---------- Background Effects ---------- */
#stars-canvas {
  position: fixed; top: 0; left: 0;
  width: 100%; height: 100%;
  pointer-events: none;
  z-index: 0;
  opacity: 0.7;
}

.nebula {
  position: fixed;
  border-radius: 50%;
  filter: blur(100px);
  pointer-events: none;
  z-index: 0;
}
.nebula-1 { width: 500px; height: 500px; background: rgba(139,92,246,0.07); top: 10%; left: -10%; }
.nebula-2 { width: 400px; height: 400px; background: rgba(34,211,238,0.06); top: 40%; right: -8%; }
.nebula-3 { width: 350px; height: 350px; background: rgba(244,114,182,0.05); bottom: 5%; left: 30%; }

/* ---------- Navigation ---------- */
nav {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 1.2rem 4rem;
  background: rgba(5,7,15,0.88);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

.nav-logo {
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--cyan);
  letter-spacing: 0.05em;
}
.nav-logo span { color: var(--purple-light); }

.nav-links {
  display: flex; gap: 2rem;
  list-style: none;
}
.nav-links a {
  color: var(--text-muted);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--cyan); }

.nav-hamburger {
  display: none;
  flex-direction: column; gap: 5px;
  cursor: pointer; padding: 4px;
}
.nav-hamburger span {
  width: 24px; height: 2px;
  background: var(--text-muted);
  border-radius: 2px;
  transition: all 0.3s;
}

/* ---------- Section Base ---------- */
section { position: relative; z-index: 1; }

.section-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 6rem 2rem;
}

.section-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 0.6rem;
}

.section-title {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}
.section-title .accent { color: var(--purple-light); }

.section-divider {
  width: 60px; height: 2px;
  background: linear-gradient(90deg, var(--purple), var(--cyan));
  margin-bottom: 3rem;
  border-radius: 2px;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-display);
  font-size: 0.9rem; font-weight: 500;
  cursor: pointer;
  transition: all 0.25s;
  border: none;
}
.btn-primary {
  background: var(--purple); color: #fff;
  box-shadow: 0 0 30px rgba(139,92,246,0.35);
}
.btn-primary:hover {
  background: var(--purple-light);
  box-shadow: 0 0 45px rgba(139,92,246,0.55);
  transform: translateY(-2px);
}
.btn-outline {
  background: transparent; color: var(--cyan);
  border: 1px solid rgba(34,211,238,0.4);
}
.btn-outline:hover {
  background: rgba(34,211,238,0.08);
  border-color: var(--cyan);
  transform: translateY(-2px);
}

/* ---------- Animations ---------- */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

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

.reveal {
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal-ready .reveal {
  opacity: 0;
  transform: translateY(30px);
}
.reveal-ready .reveal.visible { opacity: 1; transform: none; }

/* ---------- Hero ---------- */
#hero {
  min-height: 100vh;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  text-align: center;
  padding: 8rem 2rem 4rem;
}

.orbit-ring {
  position: absolute; border-radius: 50%;
  border: 1px solid; pointer-events: none;
  animation: spin linear infinite;
}
.orbit-1 {
  width: 380px; height: 380px;
  border-color: rgba(139,92,246,0.1);
  top: 50%; left: 50%; margin: -190px 0 0 -190px;
  animation-duration: 18s;
}
.orbit-2 {
  width: 560px; height: 560px;
  border-color: rgba(34,211,238,0.07);
  top: 50%; left: 50%; margin: -280px 0 0 -280px;
  animation-duration: 28s;
  animation-direction: reverse;
}
.orbit-dot {
  position: absolute; width: 6px; height: 6px;
  border-radius: 50%; top: -3px; left: 50%; margin-left: -3px;
}
.orbit-1 .orbit-dot { background: var(--purple); box-shadow: 0 0 10px var(--purple); }
.orbit-2 .orbit-dot { background: var(--cyan);   box-shadow: 0 0 10px var(--cyan); }

.hero-eyebrow {
  font-family: var(--font-mono); font-size: 0.8rem;
  letter-spacing: 0.2em; color: var(--cyan);
  text-transform: uppercase; margin-bottom: 1.5rem;
  opacity: 0; animation: fadeUp 0.8s ease 0.3s forwards;
}
.hero-name {
  font-size: clamp(2.8rem, 7vw, 5.5rem); font-weight: 700;
  line-height: 1.05; letter-spacing: -0.02em; margin-bottom: 1rem;
  opacity: 0; animation: fadeUp 0.8s ease 0.5s forwards;
}
.hero-name .glow-purple { color: var(--purple-light); text-shadow: 0 0 40px rgba(139,92,246,0.5); }
.hero-name .glow-cyan   { color: var(--cyan);         text-shadow: 0 0 40px rgba(34,211,238,0.4); }

.hero-role {
  font-size: 1.25rem; color: var(--text-muted); font-weight: 300;
  margin-bottom: 2rem;
  opacity: 0; animation: fadeUp 0.8s ease 0.7s forwards;
}
.hero-role strong { color: var(--pink); font-weight: 500; }

.hero-desc {
  max-width: 560px; font-size: 1rem; color: var(--text-dim);
  line-height: 1.8; margin-bottom: 3rem;
  opacity: 0; animation: fadeUp 0.8s ease 0.9s forwards;
}
.hero-cta {
  display: flex; gap: 1rem; flex-wrap: wrap; justify-content: center;
  opacity: 0; animation: fadeUp 0.8s ease 1.1s forwards;
}

/* ---------- About ---------- */
#about { background: var(--bg2); }

.about-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 4rem; align-items: start;
}
.about-avatar-wrap { display: flex; justify-content: center; }
.about-avatar {
  width: 260px; height: 260px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--surface), var(--surface2));
  border: 2px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  font-size: 5rem; position: relative;
  box-shadow: 0 0 60px rgba(139,92,246,0.2);
}
.avatar-initials {
  width: 100%; height: 100%;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: var(--cyan-light);
  font-family: var(--font-mono);
  font-size: 3.5rem;
  font-weight: 700;
  letter-spacing: 0;
}
.about-avatar::after {
  content: '';
  position: absolute; inset: -8px; border-radius: 50%;
  border: 1px dashed rgba(139,92,246,0.3);
  animation: spin 20s linear infinite;
}
.about-text p { color: var(--text-muted); margin-bottom: 1rem; font-size: 0.95rem; }

.stat-row { display: grid; grid-template-columns: repeat(3,1fr); gap: 1rem; margin-top: 2rem; }
.stat-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-md); padding: 1.2rem; text-align: center;
}
.stat-num {
  font-size: 1.8rem; font-weight: 700;
  color: var(--purple-light); font-family: var(--font-mono); display: block;
}
.stat-label { font-size: 0.75rem; color: var(--text-dim); margin-top: 0.3rem; text-transform: uppercase; letter-spacing: 0.08em; }

/* ---------- Experience ---------- */
#experience { background: var(--bg); }

.timeline { position: relative; padding-left: 2rem; }
.timeline::before {
  content: ''; position: absolute; left: 0; top: 0; bottom: 0;
  width: 1px; background: linear-gradient(180deg, var(--purple), var(--cyan), transparent);
}
.timeline-item { position: relative; margin-bottom: 3rem; padding-left: 2rem; }
.timeline-item::before {
  content: ''; position: absolute; left: -6px; top: 8px;
  width: 12px; height: 12px; border-radius: 50%;
  background: var(--purple); box-shadow: 0 0 15px rgba(139,92,246,0.6);
  border: 2px solid var(--bg);
}
.timeline-meta   { display: flex; align-items: center; gap: 1rem; margin-bottom: 0.4rem; flex-wrap: wrap; }
.timeline-company { font-weight: 600; font-size: 1rem; color: var(--text); }
.timeline-badge  { font-size: 0.7rem; padding: 0.2rem 0.7rem; border-radius: 20px; font-family: var(--font-mono); }
.badge-current   { background: rgba(34,211,238,0.15); color: var(--cyan); border: 1px solid rgba(34,211,238,0.3); }
.badge-past      { background: rgba(139,92,246,0.12); color: var(--purple-light); border: 1px solid rgba(139,92,246,0.25); }
.timeline-role   { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 0.25rem; }
.timeline-date   { font-family: var(--font-mono); font-size: 0.75rem; color: var(--text-dim); margin-bottom: 0.75rem; }
.timeline-desc   { color: var(--text-muted); font-size: 0.9rem; line-height: 1.7; }

.timeline-tags  { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 0.75rem; }
.tag {
  font-size: 0.72rem; padding: 0.2rem 0.65rem;
  border-radius: 4px; font-family: var(--font-mono);
  background: rgba(255,255,255,0.04); color: var(--text-dim);
  border: 1px solid rgba(255,255,255,0.07);
}

/* ---------- Skills ---------- */
#skills { background: var(--bg2); }

.skills-grid { display: grid; grid-template-columns: repeat(auto-fit,minmax(280px,1fr)); gap: 1.5rem; }
.skill-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 1.5rem;
  transition: transform 0.2s, box-shadow 0.2s;
}
.skill-card:hover { transform: translateY(-4px); box-shadow: 0 8px 40px rgba(139,92,246,0.15); }
.skill-card-icon  { font-size: 1.6rem; margin-bottom: 0.75rem; }
.skill-card-title { font-size: 0.85rem; font-weight: 600; color: var(--text); text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 1rem; }

.skill-pills { display: flex; flex-wrap: wrap; gap: 0.45rem; }
.skill-pill  { font-size: 0.75rem; padding: 0.3rem 0.75rem; border-radius: 20px; font-family: var(--font-mono); }
.pill-purple { background: rgba(139,92,246,0.12); color: var(--purple-light); border: 1px solid rgba(139,92,246,0.25); }
.pill-cyan   { background: rgba(34,211,238,0.10); color: var(--cyan-light);   border: 1px solid rgba(34,211,238,0.20); }
.pill-pink   { background: rgba(244,114,182,0.10);color: var(--pink);         border: 1px solid rgba(244,114,182,0.20); }
.pill-gray   { background: rgba(255,255,255,0.05); color: var(--text-dim);    border: 1px solid rgba(255,255,255,0.08); }

/* ---------- Projects ---------- */
#projects { background: var(--bg); }

.projects-grid { display: grid; grid-template-columns: repeat(auto-fit,minmax(310px,1fr)); gap: 1.5rem; }
.project-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 1.8rem;
  position: relative; overflow: hidden;
  transition: transform 0.25s, box-shadow 0.25s;
  display: block; color: inherit;
}
.project-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, var(--purple), var(--cyan));
  opacity: 0; transition: opacity 0.25s;
}
.project-card:hover { transform: translateY(-5px); box-shadow: 0 10px 50px rgba(34,211,238,0.1); }
.project-card:hover::before { opacity: 1; }
.project-emoji { font-size: 2rem; margin-bottom: 1rem; }
.project-name  { font-size: 1.1rem; font-weight: 600; color: var(--text); margin-bottom: 0.5rem; }
.project-desc  { font-size: 0.875rem; color: var(--text-muted); margin-bottom: 1.2rem; line-height: 1.7; }

.project-links { display: flex; gap: 0.5rem; flex-wrap: wrap; margin-top: 0.75rem; }
.proj-link {
  display: inline-flex; align-items: center; gap: 0.35rem;
  font-family: var(--font-mono); font-size: 0.72rem;
  color: var(--cyan); padding: 0.3rem 0.75rem;
  border: 1px solid rgba(34,211,238,0.3); border-radius: 4px;
  transition: all 0.2s;
}
.proj-link:hover { background: rgba(34,211,238,0.08); }
.proj-link.github { color: var(--purple-light); border-color: rgba(139,92,246,0.3); }
.proj-link.github:hover { background: rgba(139,92,246,0.08); }

/* ---------- Education ---------- */
#education { background: var(--bg2); }

.education-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.25rem;
  align-items: stretch;
}

.edu-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 1.5rem;
  display: flex; flex-direction: column; gap: 1rem; align-items: flex-start;
  min-height: 100%;
}
.edu-icon   { font-size: 2.4rem; flex-shrink: 0; }
.edu-degree { font-size: 1rem; font-weight: 600; color: var(--text); margin-bottom: 0.3rem; line-height: 1.4; }
.edu-college { font-size: 0.875rem; color: var(--purple-light); margin-bottom: 0.25rem; }
.edu-meta   { font-size: 0.8rem; color: var(--text-dim); font-family: var(--font-mono); }
.edu-grade  { display: inline-flex; align-items: center; gap: 0.4rem; margin-top: 0.5rem; font-size: 0.8rem; font-family: var(--font-mono); color: var(--cyan); }

/* ---------- Certificates ---------- */
#certificates { background: var(--bg); }

.cert-section-note {
  color: var(--text-dim); font-size: 0.85rem;
  margin-bottom: 2rem; font-family: var(--font-mono);
}

.cert-grid { display: grid; grid-template-columns: repeat(auto-fill,minmax(260px,1fr)); gap: 1.25rem; }
.cert-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 12px; padding: 1.4rem;
  display: flex; gap: 1rem; align-items: flex-start;
  cursor: pointer; position: relative;
  transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
}
.cert-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 30px rgba(139,92,246,0.2);
  border-color: rgba(139,92,246,0.45);
}
.cert-icon {
  width: 42px; height: 42px; border-radius: var(--radius-md);
  background: rgba(139,92,246,0.15); display: flex; align-items: center;
  justify-content: center; font-size: 1.3rem; flex-shrink: 0;
  border: 1px solid rgba(139,92,246,0.2);
}
.cert-name    { font-size: 0.875rem; font-weight: 600; color: var(--text); margin-bottom: 0.3rem; line-height: 1.4; }
.cert-issuer  { font-size: 0.75rem; color: var(--text-dim); font-family: var(--font-mono); }
.cert-score   {
  display: inline-block; margin-top: 0.4rem; font-size: 0.7rem;
  padding: 0.15rem 0.6rem; background: rgba(34,211,238,0.1);
  color: var(--cyan-light); border-radius: 20px;
  font-family: var(--font-mono); border: 1px solid rgba(34,211,238,0.2);
}
.cert-open-hint {
  position: absolute; top: 0.75rem; right: 0.75rem;
  font-size: 0.65rem; color: var(--text-dim); font-family: var(--font-mono);
  opacity: 0; transition: opacity 0.2s;
}
.cert-card:hover .cert-open-hint { opacity: 1; }

/* ---------- Certificate Modal ---------- */
.modal-overlay {
  display: none; position: fixed; inset: 0;
  background: rgba(0,0,0,0.85); z-index: 999;
  align-items: center; justify-content: center;
  padding: 1rem; backdrop-filter: blur(8px);
}
.modal-overlay.active { display: flex; }

.modal-box {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-xl); width: 100%; max-width: 900px;
  max-height: 90vh; display: flex; flex-direction: column; overflow: hidden;
}
.modal-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 1rem 1.5rem; border-bottom: 1px solid var(--border);
}
.modal-title  { font-size: 0.95rem; font-weight: 600; color: var(--text); }
.modal-close  {
  background: none; border: none; color: var(--text-muted);
  font-size: 1.5rem; cursor: pointer; line-height: 1; transition: color 0.2s;
}
.modal-close:hover { color: var(--text); }
.modal-body   {
  flex: 1; overflow: auto; padding: 1rem;
  display: flex; align-items: center; justify-content: center; min-height: 400px;
}
.modal-body iframe { width: 100%; height: 70vh; border: none; border-radius: 8px; background: #fff; }
.modal-body img    { max-width: 100%; max-height: 70vh; object-fit: contain; border-radius: 8px; }

/* ---------- Contact ---------- */
#contact { background: var(--bg2); }
.contact-inner { text-align: center; }

.contact-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 4rem; margin-top: 3rem; text-align: left;
}

.contact-info-title {
  font-size: 1.1rem; font-weight: 600; color: var(--text); margin-bottom: 0.5rem;
}
.contact-info-sub { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 2rem; }

.contact-links { display: flex; flex-direction: column; gap: 0.85rem; }
.contact-link {
  display: flex; align-items: center; gap: 0.85rem;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-md); padding: 0.85rem 1.2rem;
  color: var(--text-muted); font-size: 0.875rem;
  transition: all 0.2s;
}
.contact-link:hover {
  border-color: var(--purple); color: var(--text);
  transform: translateX(4px); box-shadow: 0 4px 20px rgba(139,92,246,0.15);
}
.contact-link-icon {
  width: 36px; height: 36px; border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0; font-size: 1.1rem;
}
.contact-link-icon.email  { background: rgba(139,92,246,0.15); }
.contact-link-icon.phone  { background: rgba(34,211,238,0.12); }
.contact-link-icon.linkedin { background: rgba(34,211,238,0.12); }
.contact-link-icon.github { background: rgba(255,255,255,0.06); }

/* ---------- Contact Form ---------- */
.contact-form-wrap {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 2rem;
}
.form-title {
  font-size: 1.1rem; font-weight: 600; color: var(--text); margin-bottom: 0.3rem;
}
.form-sub { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 1.5rem; }

.form-row   { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.form-group { margin-bottom: 1rem; }
.form-group label {
  display: block; font-size: 0.8rem; color: var(--text-muted);
  font-family: var(--font-mono); letter-spacing: 0.05em; margin-bottom: 0.4rem;
}
.form-group input,
.form-group textarea,
.form-group select {
  width: 100%; background: var(--bg2);
  border: 1px solid rgba(139,92,246,0.25); border-radius: var(--radius-sm);
  padding: 0.7rem 1rem; color: var(--text);
  font-family: var(--font-display); font-size: 0.9rem;
  transition: border-color 0.2s, box-shadow 0.2s;
  outline: none;
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--purple);
  box-shadow: 0 0 0 3px rgba(139,92,246,0.12);
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--text-dim); }
.form-group textarea { resize: vertical; min-height: 120px; }
.form-group select option { background: var(--surface2); }

.form-submit { width: 100%; margin-top: 0.5rem; justify-content: center; }

.form-status {
  margin-top: 1rem; padding: 0.75rem 1rem; border-radius: var(--radius-sm);
  font-size: 0.875rem; text-align: center; display: none;
}
.form-status.success { background: rgba(34,211,238,0.1); color: var(--cyan-light); border: 1px solid rgba(34,211,238,0.3); }
.form-status.error   { background: rgba(244,114,182,0.1); color: var(--pink);       border: 1px solid rgba(244,114,182,0.3); }
.form-status.sending { background: rgba(139,92,246,0.1); color: var(--purple-light); border: 1px solid rgba(139,92,246,0.3); }

/* ---------- Footer ---------- */
footer {
  position: relative; z-index: 1; text-align: center;
  padding: 2rem; border-top: 1px solid var(--border);
  font-family: var(--font-mono); font-size: 0.75rem; color: var(--text-dim);
}
footer span { color: var(--purple-light); }
footer a { color: var(--text-dim); transition: color 0.2s; }
footer a:hover { color: var(--cyan); }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .about-grid   { grid-template-columns: 1fr; text-align: center; }
  .about-avatar-wrap { margin-bottom: 2rem; }
  .contact-grid { grid-template-columns: 1fr; gap: 2rem; }
  .education-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  nav { padding: 1rem 1.5rem; }
  .nav-links { display: none; flex-direction: column; gap: 1rem; position: absolute; top: 100%; left: 0; right: 0; background: rgba(5,7,15,0.97); padding: 1.5rem 2rem; border-bottom: 1px solid var(--border); }
  .nav-links.open { display: flex; }
  .nav-hamburger { display: flex; }
  .section-inner { padding: 4rem 1.5rem; }
  .orbit-1, .orbit-2 { display: none; }
  .form-row { grid-template-columns: 1fr; }
  .stat-row { grid-template-columns: repeat(3,1fr); }
}

@media (max-width: 480px) {
  .hero-cta { flex-direction: column; align-items: center; }
  .projects-grid { grid-template-columns: 1fr; }
  .cert-grid { grid-template-columns: 1fr; }
}