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

:root {
  --c-bg:       #03060F;
  --c-surface:  #070D1C;
  --c-card:     #0A1228;
  --c-border:   rgba(0, 151, 245, 0.12);
  --c-border-h: rgba(0, 228, 245, 0.35);
  --c-cyan:     #00E4F5;
  --c-blue:     #004AF5;
  --c-sky:      #0097F5;
  --c-mint:     #00F5B3;
  --c-indigo:   #0400F5;
  --c-steel:    #52B6F5;
  --c-text:     #E8F0FF;
  --c-muted:    #7A90B8;
  --c-dim:      #3A4E6E;
  --grad-hero:   linear-gradient(135deg, #004AF5 0%, #00E4F5 100%);
  --grad-card:   linear-gradient(135deg, rgba(0,74,245,0.08) 0%, rgba(0,228,245,0.04) 100%);
  --grad-accent: linear-gradient(90deg, #00E4F5, #004AF5, #00F5B3);
  --radius-sm:  8px;
  --radius-md:  16px;
  --radius-lg:  24px;
  --radius-xl:  32px;
  --font-display: 'Syne', sans-serif;
  --font-body:    'DM Sans', sans-serif;
  --nav-h: 72px;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--c-bg);
  color: var(--c-text);
  overflow-x: hidden;
}

/* ─── NOISE OVERLAY ─────────────────────────── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='1'/%3E%3C/svg%3E");
  opacity: 0.022;
  pointer-events: none;
  z-index: 1;
}

/* ─── GLOW BLOB ─────────────────────────────── */
.blob {
  position: fixed;
  border-radius: 50%;
  filter: blur(120px);
  pointer-events: none;
  z-index: 0;
  animation: blobDrift 18s ease-in-out infinite;
}
.blob-1 { width: 600px; height: 600px; background: rgba(0,74,245,0.12); top: -200px; left: -100px; animation-delay: 0s; }
.blob-2 { width: 500px; height: 500px; background: rgba(0,228,245,0.07); top: 40%; right: -150px; animation-delay: -6s; }
.blob-3 { width: 400px; height: 400px; background: rgba(0,245,179,0.05); bottom: 10%; left: 20%; animation-delay: -12s; }

@keyframes blobDrift {
  0%, 100% { transform: translate(0,0) scale(1); }
  33%       { transform: translate(40px, -30px) scale(1.05); }
  66%       { transform: translate(-20px, 40px) scale(0.97); }
}

/* ─── NAVBAR ────────────────────────────────── */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 5vw;
  background: rgba(3,6,15,0);
  backdrop-filter: blur(0px);
  transition: background 0.4s ease, backdrop-filter 0.4s ease, border-bottom 0.4s ease;
}
nav.scrolled {
  background: rgba(3,6,15,0.96);
  backdrop-filter: blur(20px) saturate(1.5);
}

.nav-logo {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  background: var(--grad-hero);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: 2.5rem;
  list-style: none;
}
.nav-links a {
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--c-muted);
  text-decoration: none;
  letter-spacing: 0.02em;
  transition: color 0.2s ease;
  position: relative;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0;
  width: 0; height: 1px;
  background: var(--c-cyan);
  transition: width 0.3s ease;
}
.nav-links a:hover { color: var(--c-cyan); }
.nav-links a:hover::after { width: 100%; }

.nav-cta {
  padding: 0.5rem 1.25rem;
  border-radius: 50px;
  border: 1px solid rgba(0,228,245,0.4);
  color: var(--c-cyan) !important;
  font-size: 0.8125rem !important;
  font-weight: 500 !important;
  transition: background 0.2s ease, box-shadow 0.2s ease !important;
}
.nav-cta:hover {
  background: rgba(0,228,245,0.08) !important;
  box-shadow: 0 0 20px rgba(0,228,245,0.2) !important;
}
.nav-cta::after { display: none !important; }

.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
}
.nav-hamburger span {
  display: block;
  width: 24px; height: 2px;
  background: var(--c-muted);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

/* ─── HERO ──────────────────────────────────── */
#hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: calc(var(--nav-h) + 4rem) 5vw 6rem;
  position: relative;
  z-index: 2;
}

.hero-inner { max-width: 860px; }

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.5; transform: scale(0.8); }
}

.hero-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.75rem, 7vw, 5.5rem);
  line-height: 1.0;
  letter-spacing: -0.03em;
  color: var(--c-text);
  margin-bottom: 1.5rem;
  opacity: 0;
  transform: translateY(30px);
  animation: fadeUp 0.7s ease forwards 0.35s;
}
.hero-title .accent {
  background: var(--grad-hero);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-title .accent-mint {
  background: linear-gradient(90deg, #00F5B3, #0097F5);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--c-muted);
  font-weight: 300;
  line-height: 1.7;
  max-width: 580px;
  margin: 0 auto 2.5rem;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeUp 0.7s ease forwards 0.5s;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeUp 0.7s ease forwards 0.65s;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 2rem;
  border-radius: 50px;
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 500;
  text-decoration: none;
  transition: transform 0.2s ease, box-shadow 0.2s ease, filter 0.2s ease;
}
.btn:hover { transform: translateY(-2px); }

.btn-primary {
  background: var(--grad-hero);
  color: #fff;
  box-shadow: 0 8px 32px rgba(0,74,245,0.35);
}
.btn-primary:hover { box-shadow: 0 12px 40px rgba(0,74,245,0.5); filter: brightness(1.1); }

.btn-ghost {
  border: 1px solid var(--c-border-h);
  color: var(--c-text);
  background: rgba(255,255,255,0.02);
}
.btn-ghost:hover { background: rgba(0,228,245,0.06); border-color: rgba(0,228,245,0.5); }

.hero-scroll {
  position: absolute;
  bottom: 2.5rem;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--c-dim);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  opacity: 0;
  animation: fadeUp 0.7s ease forwards 1s;
}
.hero-scroll .scroll-line {
  width: 1px; height: 40px;
  background: linear-gradient(to bottom, var(--c-sky), transparent);
  animation: scrollPulse 2s ease infinite;
}
@keyframes scrollPulse {
  0%, 100% { opacity: 1; transform: scaleY(1); }
  50%       { opacity: 0.4; transform: scaleY(0.8); }
}

/* ─── SECTION BASE ──────────────────────────── */
section { position: relative; z-index: 2; }

.section-wrap {
  max-width: 1120px;
  margin: 0 auto;
}

.section-header {
  text-align: center;
  margin-bottom: 4rem;
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.section-header.visible { opacity: 1; transform: translateY(0); }

.section-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-cyan);
  margin-bottom: 0.75rem;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
  color: var(--c-text);
  margin-bottom: 1rem;
}

.section-desc {
  font-size: 1rem;
  color: var(--c-muted);
  max-width: 520px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ─── DIVIDER ───────────────────────────────── */
.section-divider {
  height: 1px;
  background: linear-gradient(to right, transparent, var(--c-border), transparent);
  margin: 0 5vw;
}

/* ─── ABOUT ─────────────────────────────────── */
#about { padding: 7rem 5vw; }

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: center;
}

.about-visual {
  position: relative;
  opacity: 0;
  transform: translateX(-40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}
.about-visual.visible { opacity: 1; transform: translateX(0); }

.about-avatar-wrap {
  position: relative;
  width: 300px;
  height: 300px;
  margin: 0 auto;
}
.avatar-ring {
  position: absolute;
  inset: -12px;
  border-radius: 50%;
  border: 1px solid transparent;
  background: linear-gradient(135deg, rgba(0,228,245,0.4), rgba(0,74,245,0.1)) border-box;
  -webkit-mask: linear-gradient(#fff 0 0) padding-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: destination-out;
  mask-composite: exclude;
  animation: spin 12s linear infinite;
}
.avatar-ring-2 {
  position: absolute;
  inset: -24px;
  border-radius: 50%;
  border: 1px solid rgba(0,74,245,0.2);
  animation: spin 20s linear infinite reverse;
}
@keyframes spin { to { transform: rotate(360deg); } }

.avatar-placeholder {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: var(--grad-card);
  border: 1px solid var(--c-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 5rem;
  position: relative;
  overflow: hidden;
}
.avatar-placeholder::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 30% 30%, rgba(0,228,245,0.1), transparent 60%);
}

.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 2rem;
}
.stat-card {
  padding: 1.25rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--c-border);
  background: var(--grad-card);
  text-align: center;
  transition: border-color 0.3s ease, transform 0.3s ease;
}
.stat-card:hover { border-color: var(--c-border-h); transform: translateY(-3px); }
.stat-num {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 800;
  background: var(--grad-hero);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}
.stat-label {
  font-size: 0.8rem;
  color: var(--c-muted);
  margin-top: 0.25rem;
}

.about-content {
  opacity: 0;
  transform: translateX(40px);
  transition: opacity 0.8s ease 0.2s, transform 0.8s ease 0.2s;
}
.about-content.visible { opacity: 1; transform: translateX(0); }

.about-content .section-tag { text-align: left; }
.about-content .section-title { text-align: left; font-size: clamp(1.5rem, 3vw, 2.25rem); }

.about-text {
  color: var(--c-muted);
  line-height: 1.8;
  font-size: 0.9375rem;
  margin-bottom: 1.25rem;
}
.about-text:last-of-type { margin-bottom: 1.75rem; }
.about-text strong {
  color: var(--c-steel);
  font-weight: 500;
}

.skill-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.chip {
  padding: 0.375rem 0.875rem;
  border-radius: 50px;
  border: 1px solid var(--c-border);
  background: rgba(0,151,245,0.06);
  font-size: 0.8125rem;
  color: var(--c-steel);
  font-weight: 500;
  transition: border-color 0.2s, background 0.2s, color 0.2s;
}
.chip:hover { border-color: rgba(0,228,245,0.4); background: rgba(0,228,245,0.08); color: var(--c-cyan); }

/* ─── PROJECTS ──────────────────────────────── */
#projects { padding: 7rem 5vw; }

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1.5rem;
}

.project-card {
  border-radius: var(--radius-lg);
  border: 1px solid var(--c-border);
  background: var(--c-card);
  overflow: hidden;
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease, border-color 0.3s ease, box-shadow 0.3s ease;
  position: relative;
}
.project-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--grad-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
  z-index: 1;
}
.project-card.visible { opacity: 1; transform: translateY(0); }
.project-card:hover {
  border-color: var(--c-border-h);
  transform: translateY(-6px);
  box-shadow: 0 24px 60px rgba(0,74,245,0.18), 0 0 0 1px rgba(0,228,245,0.1);
}
.project-card:hover::before { transform: scaleX(1); }

.project-thumb {
  height: 180px;
  background: var(--grad-card);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}
.project-thumb::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(105deg, transparent 40%, rgba(255,255,255,0.03) 50%, transparent 60%);
  transform: translateX(-100%);
  transition: transform 0.6s ease;
}
.project-card:hover .project-thumb::after { transform: translateX(100%); }

.project-thumb-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.project-card:hover .project-thumb-img { transform: scale(1.05); }

/* Thumb variantes por projeto */
.project-thumb-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  font-size: 2.5rem;
  background: linear-gradient(135deg, rgba(0,74,245,0.18) 0%, rgba(0,228,245,0.08) 100%);
  position: relative;
}
.project-thumb-placeholder .thumb-label {
  font-family: var(--font-display);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(0,228,245,0.4);
}

/* Gradientes únicos por categoria */
.project-card[data-category="backend"] .project-thumb-placeholder {
  background: linear-gradient(135deg, rgba(0,74,245,0.22) 0%, rgba(4,0,245,0.1) 100%);
}
.project-card[data-category="fullstack"] .project-thumb-placeholder {
  background: linear-gradient(135deg, rgba(0,245,179,0.14) 0%, rgba(0,151,245,0.1) 100%);
}
.project-card[data-category="frontend"] .project-thumb-placeholder {
  background: linear-gradient(135deg, rgba(0,228,245,0.16) 0%, rgba(82,182,245,0.08) 100%);
}

.project-thumb-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(10,18,40,0.8) 0%, transparent 50%);
}

.project-tags-top {
  position: absolute;
  top: 1rem; left: 1rem;
  display: flex;
  gap: 0.4rem;
}
.tag-pill {
  padding: 0.2rem 0.6rem;
  border-radius: 50px;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.tag-backend  { background: rgba(0,74,245,0.3);  color: #80a8ff; border: 1px solid rgba(0,74,245,0.4); }
.tag-frontend { background: rgba(0,228,245,0.2); color: var(--c-cyan); border: 1px solid rgba(0,228,245,0.3); }
.tag-fullstack{ background: rgba(0,245,179,0.15); color: var(--c-mint); border: 1px solid rgba(0,245,179,0.3); }
.tag-mobile   { background: rgba(82,182,245,0.2); color: var(--c-steel); border: 1px solid rgba(82,182,245,0.3); }
.tag-solo     { background: rgba(4,0,245,0.25); color: #a0a8ff; border: 1px solid rgba(4,0,245,0.4); }
.tag-powerbi  { background: rgba(240,180,0,0.15); color: #f5c842; border: 1px solid rgba(240,180,0,0.3); }
.tag-integrations { background: rgba(0,245,179,0.12); color: var(--c-mint); border: 1px solid rgba(0,245,179,0.25); }

.project-body { padding: 1.5rem; }

.project-role {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--c-sky);
  margin-bottom: 0.5rem;
}

.project-name {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--c-text);
  margin-bottom: 0.75rem;
  line-height: 1.2;
}

.project-desc {
  font-size: 0.875rem;
  color: var(--c-muted);
  line-height: 1.7;
  margin-bottom: 1.25rem;
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1.25rem;
}
.tech-tag {
  padding: 0.2rem 0.55rem;
  border-radius: 4px;
  background: rgba(0,151,245,0.1);
  border: 1px solid rgba(0,151,245,0.15);
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--c-steel);
  font-family: 'DM Mono', monospace;
}

.project-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1.25rem;
  border-top: 1px solid var(--c-border);
}

.project-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--c-cyan);
  text-decoration: none;
  transition: gap 0.2s ease;
}
.project-link:hover { gap: 0.7rem; }

.more-projects-wrap {
  text-align: center;
  margin-top: 3.5rem;
}
.more-line {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}
.more-line::before, .more-line::after {
  content: '';
  flex: 1;
  height: 1px;
  background: linear-gradient(to right, transparent, var(--c-border), transparent);
}
.more-line span {
  font-size: 0.875rem;
  color: var(--c-dim);
  font-style: italic;
}

/* ─── STACK ─────────────────────────────────── */
#stack { padding: 7rem 5vw; }

.stack-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1rem;
}

.stack-card {
  padding: 1.5rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--c-border);
  background: var(--c-card);
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease, border-color 0.3s, box-shadow 0.3s;
  position: relative;
  overflow: hidden;
}
.stack-card::after {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  background: var(--stack-accent, var(--c-sky));
  border-radius: 3px 0 0 3px;
  transform: scaleY(0);
  transform-origin: bottom;
  transition: transform 0.35s ease;
}
.stack-card.visible { opacity: 1; transform: translateY(0); }
.stack-card:hover {
  border-color: var(--c-border-h);
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(0,74,245,0.12);
}
.stack-card:hover::after { transform: scaleY(1); }

/* accent por categoria */
.stack-card:nth-child(1) { --stack-accent: #004AF5; }
.stack-card:nth-child(2) { --stack-accent: #0097F5; }
.stack-card:nth-child(3) { --stack-accent: #00E4F5; }
.stack-card:nth-child(4) { --stack-accent: #00F5B3; }
.stack-card:nth-child(5) { --stack-accent: #52B6F5; }

.stack-icon {
  width: 44px; height: 44px;
  border-radius: var(--radius-sm);
  background: var(--grad-card);
  border: 1px solid var(--c-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 1rem;
  transition: border-color 0.3s, box-shadow 0.3s;
}
.stack-card:hover .stack-icon {
  border-color: rgba(0,228,245,0.25);
  box-shadow: 0 0 12px rgba(0,228,245,0.1);
}

.stack-cat {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-sky);
  margin-bottom: 0.5rem;
}

.stack-name {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--c-text);
  margin-bottom: 0.75rem;
}

.stack-items {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}
.stack-item {
  font-size: 0.75rem;
  color: var(--c-muted);
  background: rgba(82,182,245,0.06);
  border: 1px solid rgba(82,182,245,0.12);
  padding: 0.2rem 0.55rem;
  border-radius: 4px;
}

/* ─── CONTACT ───────────────────────────────── */
#contact { padding: 7rem 5vw 5rem; }

.contact-card {
  max-width: 720px;
  margin: 0 auto;
  padding: 4rem 3.5rem;
  border-radius: var(--radius-xl);
  border: 1px solid var(--c-border);
  background: var(--c-card);
  text-align: center;
  position: relative;
  overflow: hidden;
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.contact-card::after {
  content: '';
  position: absolute;
  bottom: -60px;
  left: 50%;
  transform: translateX(-50%);
  width: 400px; height: 200px;
  background: radial-gradient(ellipse, rgba(0,74,245,0.12) 0%, transparent 70%);
  pointer-events: none;
}
.contact-card.visible { opacity: 1; transform: translateY(0); }
.contact-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--grad-accent);
}

.contact-card .section-title { margin-bottom: 0.75rem; }
.contact-card .section-desc { margin-bottom: 2.5rem; }

.contact-links {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}

.contact-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--c-border);
  background: rgba(255,255,255,0.02);
  color: var(--c-muted);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  transition: all 0.25s ease;
}
.contact-link:hover {
  border-color: var(--c-border-h);
  background: rgba(0,228,245,0.06);
  color: var(--c-cyan);
  transform: translateY(-2px);
}

.contact-email {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--c-text);
  text-decoration: none;
  border-bottom: 1px dashed var(--c-border-h);
  padding-bottom: 2px;
  transition: color 0.2s, border-color 0.2s;
}
.contact-email:hover { color: var(--c-cyan); border-color: var(--c-cyan); }

/* ─── FOOTER ────────────────────────────────── */
footer {
  position: relative; z-index: 2;
  padding: 2rem 5vw;
  border-top: 1px solid var(--c-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}
.footer-copy {
  font-size: 0.8rem;
  color: var(--c-dim);
}
.footer-copy span { color: var(--c-muted); }
.footer-back {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8rem;
  color: var(--c-dim);
  text-decoration: none;
  transition: color 0.2s;
}
.footer-back:hover { color: var(--c-cyan); }

/* ─── ANIMATIONS ────────────────────────────── */
@keyframes fadeUp {
  to { opacity: 1; transform: translateY(0); }
}

/* ─── SCROLLBAR ─────────────────────────────── */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: var(--c-bg); }
::-webkit-scrollbar-thumb { background: rgba(0,151,245,0.4); border-radius: 2px; }
::-webkit-scrollbar-thumb:hover { background: var(--c-sky); }

/* ─── RESPONSIVE ────────────────────────────── */
@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-hamburger { display: flex; }

  .nav-links.open {
    display: flex;
    flex-direction: column;
    gap: 0;
    position: absolute;
    top: var(--nav-h);
    left: 33%; right: 0;
    height: 100vh;
    background: rgba(3,6,15,0.96);
    backdrop-filter: blur(20px) saturate(1.5);
    border-bottom: 1px solid var(--c-border);
    padding: 1rem 1rem 1.5rem;
    animation: fadeDown 0.25s ease;
  }
  .nav-links.open li { width: 100%; }
  .nav-links.open a {
    display: block;
    padding: 0.875rem 5vw;
    font-size: 1rem;
  }
  .nav-links.open a::after { display: none; }

  .nav-hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-hamburger.open span:nth-child(2) { opacity: 0; }
  .nav-hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

  @keyframes fadeDown {
    from { opacity: 0; transform: translateY(-8px); }
    to   { opacity: 1; transform: translateY(0); }
  }

  #hero { padding: calc(var(--nav-h)) 5vw 6rem; }
  #about { padding: 5rem 5vw; }
  #projects, #stack, #contact { padding: 4rem 5vw; }

  .about-grid { grid-template-columns: 1fr; gap: 3rem; }
  .about-visual { transform: none !important; }
  .about-content { transform: none !important; }
  .about-avatar-wrap { width: 220px; height: 220px; }
  .avatar-img { height: inherit;}

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

  .contact-card { padding: 2rem 1.5rem; }
  .contact-email { font-size: 0.875rem; }

  footer { flex-direction: column; text-align: center; }
}

@media (max-width: 480px) {
  .hero-actions { flex-direction: column; align-items: center; }
  .btn { width: 100%; justify-content: center; }
}