/* ── DESIGN TOKENS ── */
:root {
  --bg:       #040d1a;
  --bg-2:     #061428;
  --bg-3:     #091c36;
  --bg-card:  #0c2040;
  --border:        rgba(14,165,233,0.12);
  --border-hover:  rgba(14,165,233,0.28);
  --text:       #e2eeff;
  --text-muted: #7a9fc0;
  --text-dim:   #3a5878;
  --accent:     #0ea5e9;
  --accent-2:   #38bdf8;
  --accent-glow: rgba(14,165,233,0.3);
  --teal:   #06b6d4;
  --blue:   #3b82f6;
  --purple: #818cf8;
  --orange: #fb923c;
  --green:  #34d399;
  --radius:    14px;
  --radius-sm: 8px;
  --shadow:      0 4px 24px rgba(0,0,0,0.5);
  --shadow-card: 0 8px 40px rgba(0,0,0,0.6);
  --transition: 0.25s ease;
  --nav-h: 64px;
  --font: 'Inter', system-ui, sans-serif;
  --mono: 'JetBrains Mono', 'Fira Code', monospace;
}

[data-theme="light"] {
  --bg:      #f0f6ff;
  --bg-2:    #e4eefa;
  --bg-3:    #d6e8f8;
  --bg-card: #ffffff;
  --border:       rgba(14,165,233,0.18);
  --border-hover: rgba(14,165,233,0.40);
  --text:       #0a1e35;
  --text-muted: #3a6080;
  --text-dim:   #90b8d0;
  --accent:     #0078d4;
  --accent-2:   #0ea5e9;
  --accent-glow: rgba(0,120,212,0.18);
  --shadow:      0 4px 24px rgba(0,0,0,0.08);
  --shadow-card: 0 8px 40px rgba(0,0,0,0.10);
}

/* ── RESET & BASE ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
  transition: background var(--transition), color var(--transition);
}
a { color: inherit; text-decoration: none; }
img, svg { display: block; }
button { cursor: pointer; font-family: inherit; }

/* ── SCROLLBAR ── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--accent); border-radius: 3px; }

/* ── CONTAINER ── */
.container { width: 100%; max-width: 1100px; margin: 0 auto; padding: 0 24px; }

/* ── NAV ── */
#nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--nav-h);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  background: rgba(4,13,26,0.88);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition), border-color var(--transition);
}
[data-theme="light"] #nav { background: rgba(240,246,255,0.88); }

.nav-inner {
  max-width: 1100px; margin: 0 auto; padding: 0 24px;
  height: 100%; display: flex; align-items: center; gap: 32px;
}

.nav-logo {
  font-size: 1.1rem; font-weight: 700; letter-spacing: -0.02em; color: var(--text);
}
.nav-logo span { color: var(--accent); }

.nav-links { display: flex; list-style: none; gap: 4px; margin-left: auto; }
.nav-links a {
  padding: 6px 14px; border-radius: var(--radius-sm);
  font-size: 0.88rem; color: var(--text-muted);
  transition: color var(--transition), background var(--transition);
}
.nav-links a:hover { color: var(--text); background: var(--border); }

.theme-toggle {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 7px;
  color: var(--text-muted); transition: all var(--transition);
  display: flex; align-items: center;
}
.theme-toggle:hover { color: var(--text); border-color: var(--border-hover); }
.theme-toggle svg { width: 16px; height: 16px; }
.icon-moon { display: none; }
[data-theme="light"] .icon-sun { display: none; }
[data-theme="light"] .icon-moon { display: block; }

.nav-burger {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; padding: 6px; margin-left: 8px;
}
.nav-burger span {
  display: block; width: 22px; height: 2px;
  background: var(--text-muted); border-radius: 2px;
  transition: all var(--transition);
}
.nav-mobile {
  display: none; flex-direction: column;
  padding: 8px 24px 16px;
  background: var(--bg-2); border-bottom: 1px solid var(--border);
}
.nav-mobile.open { display: flex; }
.nav-mobile a {
  padding: 10px 0; color: var(--text-muted);
  border-bottom: 1px solid var(--border); font-size: 0.95rem;
}
.nav-mobile a:last-child { border-bottom: none; }

/* ── HERO ── */
#hero {
  position: relative;
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
  padding: calc(var(--nav-h) + 60px) 24px 80px;
}

.hero-bg { position: absolute; inset: 0; pointer-events: none; }

/* Dot-grid instead of lines — more Azure-portal feel */
.hero-grid {
  position: absolute; inset: 0;
  background-image: radial-gradient(circle, rgba(14,165,233,0.18) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: radial-gradient(ellipse 85% 85% at 50% 50%, black 20%, transparent 75%);
}

/* Cloud/network topology nodes */
.hero-nodes {
  position: absolute; inset: 0;
  overflow: hidden;
}
.hero-node {
  position: absolute;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0;
  animation: node-pulse 6s ease-in-out infinite;
}
.hero-node::after {
  content: '';
  position: absolute; inset: -4px;
  border-radius: 50%;
  border: 1px solid rgba(14,165,233,0.3);
  animation: node-ring 6s ease-in-out infinite;
}
@keyframes node-pulse {
  0%   { opacity: 0; transform: scale(0.5); }
  20%  { opacity: 0.8; transform: scale(1); }
  80%  { opacity: 0.8; transform: scale(1); }
  100% { opacity: 0; transform: scale(0.5); }
}
@keyframes node-ring {
  0%   { transform: scale(1); opacity: 0.6; }
  100% { transform: scale(3); opacity: 0; }
}

.hero-glow {
  position: absolute; border-radius: 50%;
  filter: blur(120px); opacity: 0.2;
  animation: float 10s ease-in-out infinite;
}
.hero-glow-1 {
  width: 600px; height: 600px; top: -150px; left: -150px;
  background: radial-gradient(circle, #0078d4 0%, transparent 70%);
}
.hero-glow-2 {
  width: 500px; height: 500px; bottom: -100px; right: -100px;
  background: radial-gradient(circle, #06b6d4 0%, transparent 70%);
  animation-delay: -5s;
}
.hero-glow-3 {
  width: 300px; height: 300px; top: 40%; left: 60%;
  background: radial-gradient(circle, #3b82f6 0%, transparent 70%);
  animation-delay: -2.5s; opacity: 0.15;
}

@keyframes float {
  0%, 100% { transform: translateY(0) scale(1); }
  50% { transform: translateY(-40px) scale(1.08); }
}

.hero-content { position: relative; text-align: center; max-width: 760px; }

.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(14,165,233,0.08);
  border: 1px solid rgba(14,165,233,0.25);
  border-radius: 100px; padding: 6px 18px;
  font-size: 0.82rem; color: var(--accent);
  letter-spacing: 0.03em; margin-bottom: 28px;
  font-family: var(--mono);
}
.badge-dot {
  width: 7px; height: 7px; background: var(--teal);
  border-radius: 50%; animation: pulse-dot 2s ease-in-out infinite;
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.75); }
}

.hero-title {
  font-size: clamp(2.8rem, 7vw, 5.5rem);
  font-weight: 700; line-height: 1.1;
  letter-spacing: -0.04em; margin-bottom: 24px;
}

.gradient-text {
  background: linear-gradient(135deg, #0ea5e9 0%, #38bdf8 40%, #06b6d4 100%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-sub {
  font-size: clamp(1rem, 2.5vw, 1.18rem);
  color: var(--text-muted); margin-bottom: 44px; line-height: 1.8;
}

.hero-cta {
  display: flex; gap: 12px; justify-content: center;
  flex-wrap: wrap; margin-bottom: 60px;
}

/* Stat strip */
.hero-stats {
  display: flex; justify-content: center; gap: 40px;
  margin-bottom: 52px; flex-wrap: wrap;
}
.hero-stat { text-align: center; }
.hero-stat-num {
  display: block;
  font-size: 1.8rem; font-weight: 700;
  background: linear-gradient(135deg, #0ea5e9, #06b6d4);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
  font-family: var(--mono);
  line-height: 1;
}
.hero-stat-label {
  display: block; font-size: 0.75rem;
  color: var(--text-dim); text-transform: uppercase;
  letter-spacing: 0.08em; margin-top: 4px;
}

.hero-scroll {
  display: flex; flex-direction: column; align-items: center; gap: 6px;
  color: var(--text-dim); font-size: 0.75rem;
  letter-spacing: 0.08em; text-transform: uppercase;
  animation: bounce 2s ease-in-out infinite;
}
@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(6px); }
}

/* ── BUTTONS ── */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 26px; border-radius: var(--radius-sm);
  font-size: 0.92rem; font-weight: 500;
  border: 1px solid transparent; transition: all var(--transition);
}
.btn-primary {
  background: var(--accent); color: #fff;
  box-shadow: 0 0 0 0 var(--accent-glow);
}
.btn-primary:hover {
  background: var(--accent-2);
  box-shadow: 0 0 28px 4px var(--accent-glow);
  transform: translateY(-1px);
}
.btn-ghost {
  background: rgba(14,165,233,0.06);
  color: var(--text);
  border-color: var(--border);
}
.btn-ghost:hover {
  border-color: var(--accent);
  background: rgba(14,165,233,0.12);
  transform: translateY(-1px);
}
.btn-full { width: 100%; justify-content: center; }

/* ── SECTIONS ── */
section { padding: 100px 0; }

.section-header { text-align: center; margin-bottom: 64px; }
.section-tag {
  display: inline-block; font-family: var(--mono);
  font-size: 0.75rem; color: var(--accent);
  letter-spacing: 0.12em; text-transform: uppercase;
  margin-bottom: 12px;
  background: rgba(14,165,233,0.08);
  padding: 4px 14px; border-radius: 100px;
  border: 1px solid rgba(14,165,233,0.2);
}
.section-header h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700; letter-spacing: -0.03em;
}

/* ── ABOUT ── */
#about { background: var(--bg-2); }

.about-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 64px; align-items: start;
}
.about-text p { color: var(--text-muted); margin-bottom: 20px; font-size: 1rem; }
.about-text strong { color: var(--accent); font-weight: 600; }

.about-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 28px; }
.tag {
  background: rgba(14,165,233,0.07);
  border: 1px solid var(--border);
  border-radius: 100px; padding: 5px 14px;
  font-size: 0.82rem; color: var(--text-muted);
  font-family: var(--mono); transition: all var(--transition);
}
.tag:hover { border-color: var(--accent); color: var(--accent); }

.about-card-wrap {
  display: grid; grid-template-columns: 1fr 1fr; gap: 16px;
}
.about-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px;
  transition: all var(--transition);
  position: relative; overflow: hidden;
}
.about-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--teal));
  opacity: 0; transition: opacity var(--transition);
}
.about-card:hover { border-color: var(--border-hover); transform: translateY(-2px); }
.about-card:hover::before { opacity: 1; }

.card-icon {
  width: 48px; height: 48px;
  background: rgba(14,165,233,0.1);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 16px; color: var(--accent);
}
.about-card h3 { font-size: 0.95rem; font-weight: 600; margin-bottom: 8px; }
.about-card p { font-size: 0.82rem; color: var(--text-muted); line-height: 1.6; }

/* ── EXPERIENCE / TIMELINE ── */
#experience { background: var(--bg); }

.timeline-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 64px; align-items: start;
}
.timeline-col-title {
  display: flex; align-items: center; gap: 10px;
  font-size: 1rem; font-weight: 600; color: var(--text-muted);
  margin-bottom: 32px; padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}
.timeline { position: relative; padding-left: 24px; }
.timeline::before {
  content: ''; position: absolute; left: 7px; top: 8px; bottom: 0;
  width: 1px;
  background: linear-gradient(to bottom, var(--accent), transparent);
}
.timeline-item { position: relative; padding-bottom: 32px; }
.timeline-item:last-child { padding-bottom: 0; }

.timeline-marker {
  position: absolute; left: -20px; top: 6px;
  width: 12px; height: 12px; border-radius: 50%;
  background: var(--bg-3); border: 2px solid var(--border);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.timeline-item:hover .timeline-marker {
  border-color: var(--accent);
  box-shadow: 0 0 8px var(--accent-glow);
}
.timeline-marker-accent {
  background: var(--accent); border-color: var(--accent);
  box-shadow: 0 0 10px var(--accent-glow);
}
.timeline-marker-green {
  background: var(--teal); border-color: var(--teal);
}
.timeline-content { padding-left: 4px; }
.timeline-meta {
  display: flex; align-items: center; gap: 10px;
  flex-wrap: wrap; margin-bottom: 4px;
}
.timeline-badge {
  font-size: 0.7rem; font-family: var(--mono);
  padding: 2px 8px; border-radius: 4px;
  background: rgba(14,165,233,0.12);
  color: var(--accent); border: 1px solid rgba(14,165,233,0.25);
}
.timeline-badge-edu {
  background: rgba(6,182,212,0.12);
  color: var(--teal); border-color: rgba(6,182,212,0.3);
}
.timeline-date {
  font-size: 0.75rem; color: var(--text-dim); font-family: var(--mono);
}
.timeline-content h4 { font-size: 0.95rem; font-weight: 600; margin-bottom: 3px; }
.timeline-company {
  display: block; font-size: 0.82rem; color: var(--accent);
  font-weight: 500; margin-bottom: 6px;
}
.timeline-content p { font-size: 0.82rem; color: var(--text-muted); line-height: 1.6; }

/* ── CERTIFICATIONS ── */
#certs { background: var(--bg-2); }

.certs-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px;
}
.cert-card {
  display: flex; align-items: center; gap: 16px;
  padding: 20px; background: var(--bg-card);
  border: 1px solid var(--border); border-radius: var(--radius);
  transition: all var(--transition); cursor: pointer;
  position: relative; overflow: hidden;
}
.cert-card::after {
  content: ''; position: absolute;
  bottom: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--teal));
  transform: scaleX(0); transition: transform var(--transition);
  transform-origin: left;
}
.cert-card:hover {
  border-color: var(--border-hover);
  box-shadow: 0 8px 32px rgba(14,165,233,0.15);
  transform: translateY(-3px);
}
.cert-card:hover::after { transform: scaleX(1); }

/* Expert — gold */
.cert-card-expert {
  border-color: rgba(251,191,36,0.25);
  background: linear-gradient(135deg, var(--bg-card) 60%, rgba(251,191,36,0.04));
}
.cert-card-expert::after {
  background: linear-gradient(90deg, #fbbf24, #f59e0b);
}
.cert-card-expert:hover {
  border-color: rgba(251,191,36,0.5);
  box-shadow: 0 8px 32px rgba(251,191,36,0.15);
}
.cert-card-expert .cert-icon { color: #fbbf24; background: rgba(251,191,36,0.1); }
.cert-card-expert .cert-level { color: #fbbf24; }

/* AWS — orange */
.cert-card-aws {
  border-color: rgba(255,153,0,0.25);
  background: linear-gradient(135deg, var(--bg-card) 60%, rgba(255,153,0,0.04));
}
.cert-card-aws::after {
  background: linear-gradient(90deg, #ff9900, #ffb347);
}
.cert-card-aws:hover {
  border-color: rgba(255,153,0,0.5);
  box-shadow: 0 8px 32px rgba(255,153,0,0.15);
}
.cert-card-aws .cert-icon { color: #ff9900; background: rgba(255,153,0,0.1); }
.cert-card-aws .cert-level { color: #ff9900; }

.cert-icon {
  width: 44px; height: 44px; flex-shrink: 0;
  background: rgba(14,165,233,0.1);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  color: var(--accent);
}
.cert-info { flex: 1; min-width: 0; }
.cert-level {
  display: block; font-size: 0.7rem; font-family: var(--mono);
  text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--accent); margin-bottom: 2px;
}
.cert-info h4 { font-size: 0.88rem; font-weight: 600; line-height: 1.3; margin-bottom: 2px; }
.cert-issuer { font-size: 0.75rem; color: var(--text-dim); }
.cert-arrow {
  flex-shrink: 0; color: var(--text-dim);
  transition: all var(--transition);
}
.cert-card:hover .cert-arrow { color: var(--accent); transform: translateX(3px); }

/* ── SKILLS ── */
#skills { background: var(--bg); }

.skills-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 32px; }
.skill-group {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 32px;
  transition: border-color var(--transition);
  position: relative; overflow: hidden;
}
.skill-group::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--teal));
  opacity: 0; transition: opacity var(--transition);
}
.skill-group:hover { border-color: var(--border-hover); }
.skill-group:hover::before { opacity: 1; }

.skill-group-title {
  display: flex; align-items: center; gap: 10px;
  font-size: 0.95rem; font-weight: 600; margin-bottom: 20px;
  color: var(--text);
}
.skill-pills { display: flex; flex-wrap: wrap; gap: 8px; }
.pill {
  padding: 5px 13px; border-radius: 100px;
  font-size: 0.8rem; font-family: var(--mono); font-weight: 500;
  border: 1px solid transparent; transition: all var(--transition);
}
.pill:hover { transform: scale(1.05); }

.pill-blue   { background: rgba(59,130,246,0.1);  color: #60a5fa; border-color: rgba(59,130,246,0.2); }
.pill-purple { background: rgba(129,140,248,0.1); color: #a5b4fc; border-color: rgba(129,140,248,0.2); }
.pill-green  { background: rgba(6,182,212,0.1);   color: #22d3ee; border-color: rgba(6,182,212,0.2); }
.pill-orange { background: rgba(251,146,60,0.1);  color: #fb923c; border-color: rgba(251,146,60,0.2); }

/* ── PROJECTS ── */
#projects { background: var(--bg-2); }

.projects-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.project-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 28px;
  display: flex; flex-direction: column;
  transition: all var(--transition); cursor: pointer;
  position: relative; overflow: hidden;
}
.project-card::before {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(14,165,233,0.04) 0%, transparent 60%);
  opacity: 0; transition: opacity var(--transition);
}
.project-card:hover {
  border-color: var(--accent);
  box-shadow: 0 12px 40px rgba(14,165,233,0.18);
  transform: translateY(-4px);
}
.project-card:hover::before { opacity: 1; }

.project-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 20px;
}
.project-icon {
  width: 44px; height: 44px; border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
}
.project-icon-green  { background: rgba(6,182,212,0.12); color: #22d3ee; }
.project-icon-blue   { background: rgba(59,130,246,0.12); color: #60a5fa; }
.project-icon-purple { background: rgba(129,140,248,0.12); color: #a5b4fc; }

.project-lang {
  display: flex; align-items: center; gap: 6px;
  font-family: var(--mono); font-size: 0.75rem; color: var(--text-muted);
}
.lang-dot { width: 8px; height: 8px; border-radius: 50%; }
.lang-yaml { background: #cc3e44; }
.lang-ps   { background: #012456; border: 1px solid #0078d4; }

.project-card h3 {
  font-size: 1.05rem; font-weight: 600; font-family: var(--mono); margin-bottom: 10px;
}
.project-card p { font-size: 0.85rem; color: var(--text-muted); line-height: 1.7; flex: 1; }

.project-footer {
  display: flex; align-items: center; justify-content: space-between;
  margin-top: 24px; padding-top: 16px; border-top: 1px solid var(--border);
}
.project-badge {
  font-size: 0.72rem; font-family: var(--mono); padding: 2px 8px;
  border-radius: 4px; background: rgba(14,165,233,0.08);
  color: var(--accent); border: 1px solid var(--border);
}
.project-link {
  display: flex; align-items: center; gap: 5px;
  font-size: 0.82rem; color: var(--accent); font-weight: 500;
  transition: gap var(--transition);
}
.project-card:hover .project-link { gap: 8px; }
.projects-more { text-align: center; margin-top: 48px; }

/* ── CONTACT ── */
#contact { background: var(--bg); }

.contact-grid {
  display: grid; grid-template-columns: 1fr 1.2fr;
  gap: 64px; align-items: start;
}
.contact-text p { color: var(--text-muted); font-size: 1rem; margin-bottom: 36px; line-height: 1.8; }
.contact-links { display: flex; flex-direction: column; gap: 16px; }

.contact-item {
  display: flex; align-items: center; gap: 16px;
  padding: 16px 20px; background: var(--bg-card);
  border: 1px solid var(--border); border-radius: var(--radius);
  transition: all var(--transition);
}
.contact-item:not(.contact-item-static):hover {
  border-color: var(--accent);
  box-shadow: 0 0 20px rgba(14,165,233,0.15);
}
.contact-item-icon {
  width: 40px; height: 40px; background: rgba(14,165,233,0.1);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  color: var(--accent); flex-shrink: 0;
}
.contact-label {
  display: block; font-size: 0.75rem; color: var(--text-dim);
  font-family: var(--mono); text-transform: uppercase;
  letter-spacing: 0.06em; margin-bottom: 2px;
}
.contact-value { display: block; font-size: 0.92rem; font-weight: 500; }

/* ── FORM ── */
.contact-form {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 36px;
}
.form-group { margin-bottom: 20px; }
.form-group label {
  display: block; font-size: 0.82rem; color: var(--text-muted);
  margin-bottom: 8px; font-weight: 500;
}
.form-group input,
.form-group textarea {
  width: 100%; background: var(--bg-2);
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 12px 16px; color: var(--text); font-family: var(--font);
  font-size: 0.92rem;
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none; resize: vertical;
}
.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(14,165,233,0.15);
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--text-dim); }

/* ── FOOTER ── */
footer { background: var(--bg-2); border-top: 1px solid var(--border); padding: 28px 0; }
.footer-inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; flex-wrap: wrap;
}
.footer-logo { font-size: 0.95rem; font-weight: 700; }
.footer-logo span { color: var(--accent); }
.footer-copy { font-size: 0.82rem; color: var(--text-dim); }
.footer-links { display: flex; gap: 20px; }
.footer-links a {
  font-size: 0.82rem; color: var(--text-muted); transition: color var(--transition);
}
.footer-links a:hover { color: var(--accent); }

/* ── REVEAL ANIMATIONS ── */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ── RESPONSIVE ── */
@media (max-width: 900px) {
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .timeline-grid { grid-template-columns: 1fr; gap: 48px; }
  .certs-grid { grid-template-columns: 1fr 1fr; }
  .skills-grid { grid-template-columns: 1fr; }
  .projects-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .about-card-wrap { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .nav-links { display: none; }
  .nav-burger { display: flex; }
  section { padding: 72px 0; }
  .hero-sub br { display: none; }
  .about-card-wrap { grid-template-columns: 1fr; }
  .certs-grid { grid-template-columns: 1fr; }
  .contact-form { padding: 24px; }
  .footer-inner { flex-direction: column; align-items: flex-start; gap: 12px; }
}