/* ============================================================
   ROOT VARIABLES – DARK THEME (default)
   ============================================================ */
:root {
  --bg:          #080808;
  --bg-alt:      #0f0f0f;
  --surface:     #141414;
  --surface-2:   #1e1e1e;
  --border:      rgba(255,255,255,0.08);
  --border-hover:rgba(255,255,255,0.2);
  --text:        #f0f0f0;
  --text-muted:  #888;
  --text-faint:  #555;
  --accent:      #7c3aed;        /* purple */
  --accent-2:    #3b82f6;        /* blue   */
  --accent-glow: rgba(124,58,237,0.25);
  --gradient:    linear-gradient(135deg, #7c3aed, #3b82f6);
  --nav-bg:      rgba(8,8,8,0.85);
  --shadow-sm:   0 1px 3px rgba(0,0,0,0.5);
  --shadow:      0 4px 24px rgba(0,0,0,0.6);
  --shadow-lg:   0 8px 48px rgba(0,0,0,0.8);
  --radius-sm:   8px;
  --radius:      14px;
  --radius-lg:   20px;
  --transition:  0.3s ease;
  --font:        'Inter', system-ui, sans-serif;
  --mono:        'JetBrains Mono', monospace;
}

/* ── Light Theme Override ── */
[data-theme="light"] {
  --bg:          #fafafa;
  --bg-alt:      #f0f0f0;
  --surface:     #ffffff;
  --surface-2:   #f4f4f5;
  --border:      rgba(0,0,0,0.08);
  --border-hover:rgba(0,0,0,0.2);
  --text:        #111111;
  --text-muted:  #555;
  --text-faint:  #999;
  --accent:      #7c3aed;
  --accent-2:    #2563eb;
  --accent-glow: rgba(124,58,237,0.12);
  --nav-bg:      rgba(250,250,250,0.88);
  --shadow-sm:   0 1px 3px rgba(0,0,0,0.08);
  --shadow:      0 4px 24px rgba(0,0,0,0.1);
  --shadow-lg:   0 8px 48px rgba(0,0,0,0.15);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 64px;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
  position: relative;
  transition: background var(--transition), color var(--transition);
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { cursor: pointer; border: none; background: none; font-family: var(--font); }

/* ── Container ── */
.container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ── Gradient Text ── */
.gradient-text {
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ── Highlight ── */
.highlight {
  color: var(--accent);
  font-weight: 600;
}

/* ── Section base ── */
.section { padding: 80px 0; }
.section-alt { background: var(--bg-alt); }

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-glow);
  padding: 4px 14px;
  border-radius: 99px;
  border: 1px solid var(--accent);
  margin-bottom: 14px;
}

.section-title {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.section-sub {
  margin-top: 14px;
  color: var(--text-muted);
  max-width: 540px;
  margin-left: auto;
  margin-right: auto;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  transition: all var(--transition);
  cursor: pointer;
}

.btn-primary {
  background: var(--gradient);
  color: #fff;
  box-shadow: 0 4px 20px var(--accent-glow);
}
.btn-primary:hover {
  opacity: 0.9;
  transform: translateY(-2px);
  box-shadow: 0 8px 28px var(--accent-glow);
}

.btn-outline {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border-hover);
}
.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}

.btn-full { width: 100%; justify-content: center; }

/* ============================================================
   SCROLL ANIMATIONS
   ============================================================ */
.fade-up, .fade-left, .fade-right {
  opacity: 0;
  transition: opacity 0.7s ease, transform 0.7s ease;
  will-change: opacity, transform;
}
.fade-up    { transform: translateY(36px); }
.fade-left  { transform: translateX(-36px); }
.fade-right { transform: translateX(36px); }

.fade-up.visible, .fade-left.visible, .fade-right.visible {
  opacity: 1;
  transform: translate(0);
}

/* ============================================================
   NAVBAR
   ============================================================ */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  width: 100%;
  z-index: 1001;
  background: var(--nav-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition), border-color var(--transition);
  transform: translateZ(0); /* Hardware accelerate fixed pos */
}

.nav-inner {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 20px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.nav-logo {
  font-size: 1.3rem;
  font-weight: 900;
  letter-spacing: -0.03em;
  text-transform: none;
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--text);
  transition: color var(--transition);
  flex: 1;
}
.logo-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--gradient);
  flex-shrink: 0;
}
.logo-accent { color: var(--accent); }

.nav-links {
  display: flex;
  list-style: none;
  gap: 4px;
  align-items: center;
  flex: 0 0 auto;
  justify-content: center;
}

.nav-link {
  font-size: 0.88rem;
  font-weight: 500;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  transition: all var(--transition);
}
.nav-link:hover, .nav-link.active {
  color: var(--text);
  background: var(--surface);
}

.nav-actions { display: flex; align-items: center; gap: 12px; flex: 1; justify-content: flex-end; }

/* Theme Toggle */
.theme-toggle {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 7px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  background: transparent;
  color: var(--text);
  font-size: 0.82rem;
  font-weight: 600;
  transition: all var(--transition);
  box-shadow: none !important;
  outline: none !important;
  -webkit-tap-highlight-color: transparent;
}
.theme-toggle:hover {
  border-color: var(--border-hover);
  background: var(--surface);
  color: var(--accent);
  transform: scale(1.03);
}
.theme-toggle:focus-visible {
  outline: 2px solid var(--accent) !important;
  outline-offset: 2px;
}
.theme-icon { font-size: 1rem; line-height: 1; }

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 8px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  background: transparent;
  flex-shrink: 0;
  box-shadow: none !important;
  outline: none !important;
  -webkit-tap-highlight-color: transparent;
}
.hamburger:hover {
    background: var(--surface);
    border-color: var(--border);
}
.hamburger:focus-visible {
  outline: 2px solid var(--accent) !important;
  outline-offset: 2px;
}
.hamburger span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--text);
  border-radius: 2px;
  transition: all var(--transition);
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============================================================
   HERO
   ============================================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  overflow: hidden;
  padding-top: 60px;
}

/* Animated background elements */
.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.18;
  animation: glow-float 8s ease-in-out infinite;
}
.hero-glow-1 {
  width: 600px; height: 600px;
  background: var(--accent);
  top: -100px; left: -150px;
}
.hero-glow-2 {
  width: 500px; height: 500px;
  background: var(--accent-2);
  bottom: -50px; right: -100px;
  animation-delay: -4s;
}

@keyframes glow-float {
  0%, 100% { transform: translateY(0) scale(1); }
  50%       { transform: translateY(-40px) scale(1.05); }
}

.hero-grid {
  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;
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 50%, #000 40%, transparent 100%);
  mask-image: radial-gradient(ellipse 80% 60% at 50% 50%, #000 40%, transparent 100%);
  opacity: 0.5;
}

.hero-content {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 18px;
  padding-top: 40px;
  padding-bottom: 40px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: 99px;
  border: 1px solid var(--border);
  background: var(--surface);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-muted);
}

.badge-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: #22c55e;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(34,197,94,0.5); }
  50%       { box-shadow: 0 0 0 6px rgba(34,197,94,0); }
}

.hero-title {
  font-size: clamp(2.8rem, 7vw, 5.5rem);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.04em;
  color: var(--text);
  max-width: 720px;
}

.hero-sub {
  font-size: clamp(1.1rem, 2.5vw, 1.6rem);
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: -0.01em;
}

.hero-desc {
  font-size: 1rem;
  color: var(--text-muted);
  max-width: 500px;
  line-height: 1.75;
}
.hero-desc strong { color: var(--text); }

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 6px;
}

.hero-socials {
  display: flex;
  gap: 14px;
  margin-top: 4px;
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px; height: 42px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-muted);
  transition: all var(--transition);
}
.social-link svg { width: 18px; height: 18px; }
.social-link:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-3px);
  box-shadow: 0 6px 20px var(--accent-glow);
}

/* Scroll Hint */
.hero-scroll-hint {
  position: absolute;
  bottom: 36px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-faint);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  animation: bounce-hint 2.5s ease-in-out infinite;
}

.scroll-arrow {
  width: 20px; height: 20px;
  border-right: 2px solid var(--text-faint);
  border-bottom: 2px solid var(--text-faint);
  transform: rotate(45deg);
}

@keyframes bounce-hint {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50%       { transform: translateX(-50%) translateY(8px); }
}

/* ============================================================
   ABOUT
   ============================================================ */
.about-grid {
  display: grid;
  grid-template-columns: minmax(220px, 280px) 1fr;
  gap: 48px;
  align-items: start;
}

.about-image-wrap {
  position: relative;
  display: flex;
  justify-content: center;
}

.about-img-frame {
  position: relative;
  z-index: 1;
  width: 240px; height: 280px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--surface);
}

.about-img {
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: center top;
  transition: transform 0.6s ease;
}
.about-img-frame:hover .about-img { transform: scale(1.04); }

.about-img-decoration {
  position: absolute;
  width: 240px; height: 280px;
  border-radius: var(--radius-lg);
  border: 2px solid var(--accent);
  top: 16px; left: 16px;
  z-index: 0;
  opacity: 0.4;
}

.about-bio {
  color: var(--text-muted);
  font-size: 1rem;
  line-height: 1.65;
  margin-bottom: 18px;
  max-width: 680px;
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px 48px;
  margin-top: 28px;
}

.skill-group-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 10px;
}
.skill-group-title svg { width: 14px; height: 14px; color: var(--accent); }

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.skill-tag {
  padding: 5px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface);
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: all var(--transition);
}
.skill-tag:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-glow);
}

/* ============================================================
   EXPERIENCE / TIMELINE
   ============================================================ */
.timeline {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0;
  position: relative;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 14px; /* Center of the 28px marker column */
  top: 30px; /* Aligned with first dot */
  bottom: 60px; /* Aligned with last dot */
  width: 2px;
  background: var(--border);
  z-index: 0;
}

.timeline-item {
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 24px;
  position: relative;
}

.timeline-marker {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.tl-dot {
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--gradient);
  flex-shrink: 0;
  box-shadow: 0 0 0 4px var(--accent-glow);
  margin-top: 22px;
  position: relative;
  z-index: 1;
}

.tl-line {
  display: none;
}

.timeline-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 32px;
  margin-bottom: 32px;
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}
.timeline-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow), 0 0 0 1px var(--accent-glow);
  transform: translateX(4px);
}

.tl-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 18px;
}

.tl-company-wrap {
  display: flex;
  align-items: center;
  gap: 14px;
}

.tl-company-icon {
  width: 44px; height: 44px;
  border-radius: var(--radius-sm);
  background: var(--accent-glow);
  border: 1px solid var(--accent);
  display: flex; align-items: center; justify-content: center;
  color: var(--accent);
  flex-shrink: 0;
}
.tl-company-icon svg { width: 20px; height: 20px; }

.tl-role {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 2px;
}

.tl-company {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--accent);
}

.tl-meta {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 8px;
}

.tl-date {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  color: var(--text-muted);
  font-family: var(--mono);
}
.tl-date svg { width: 13px; height: 13px; }

.tl-badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 99px;
  background: var(--accent-glow);
  color: var(--accent);
  border: 1px solid var(--accent);
  letter-spacing: 0.06em;
}

.tl-points {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 20px;
}

.tl-points li {
  position: relative;
  padding-left: 18px;
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.7;
}
.tl-points li::before {
  content: '';
  position: absolute;
  left: 0; top: 10px;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
}
.tl-points li strong { color: var(--text); font-weight: 600; }

.tl-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tl-tag {
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  background: var(--surface-2);
  border: 1px solid var(--border);
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-muted);
}

/* ============================================================
   PROJECTS
   ============================================================ */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
}

.project-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.project-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient);
  opacity: 0;
  transition: opacity var(--transition);
  border-radius: var(--radius);
  pointer-events: none;
}

.project-card:hover {
  border-color: var(--accent);
  transform: translateY(-6px);
  box-shadow: var(--shadow), 0 0 30px var(--accent-glow);
}
.project-card:hover::before { opacity: 0.04; }

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

.project-icon {
  font-size: 2rem;
  line-height: 1;
}

.project-links {
  display: flex;
  gap: 10px;
}

.project-link {
  display: flex;
  width: 34px; height: 34px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text-muted);
  transition: all var(--transition);
}
.project-link svg { width: 16px; height: 16px; }
.project-link:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-glow);
}

.project-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.01em;
}

.project-desc {
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--text-muted);
  flex: 1;
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: auto;
}

.tech-tag {
  padding: 3px 10px;
  border-radius: var(--radius-sm);
  background: var(--surface-2);
  border: 1px solid var(--border);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-muted);
  font-family: var(--mono);
}

.project-note {
  display: none;
  text-align: center;
  margin: 32px auto 0;
  max-width: 280px;
  font-size: 0.9rem;
  line-height: 1.5;
  color: var(--text-muted);
  font-style: italic;
}

/* ============================================================
   CERTIFICATIONS
   ============================================================ */
.certs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}

.cert-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 0;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.cert-card::after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--gradient);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

.cert-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}
.cert-card:hover::after { transform: scaleX(1); }

.cert-badge {
  width: 48px; height: 48px;
  border-radius: var(--radius-sm);
  background: var(--accent-glow);
  border: 1px solid var(--accent);
  display: flex; align-items: center; justify-content: center;
  color: var(--accent);
  margin-bottom: 18px;
}
.cert-badge svg { width: 22px; height: 22px; }

.cert-body { flex: 1; margin-bottom: 20px; }

.cert-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 6px;
  line-height: 1.4;
}

.cert-issuer {
  display: block;
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 4px;
}

.cert-date {
  display: block;
  font-size: 0.78rem;
  color: var(--text-faint);
  font-family: var(--mono);
  margin-bottom: 12px;
}

.cert-desc {
  font-size: 0.84rem;
  line-height: 1.65;
  color: var(--text-muted);
}

.cert-link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--accent);
  transition: gap var(--transition), opacity var(--transition);
  border-top: 1px solid var(--border);
  padding-top: 16px;
}
.cert-link svg { width: 14px; height: 14px; }
.cert-link:hover { gap: 12px; opacity: 0.8; }

/* ============================================================
   CONTACT
   ============================================================ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}

.contact-heading {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text);
  margin-bottom: 14px;
  letter-spacing: -0.02em;
}

.contact-text {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.8;
  margin-bottom: 32px;
}

.contact-links {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface);
  transition: all var(--transition);
}
.contact-item:hover {
  border-color: var(--accent);
  transform: translateX(4px);
  box-shadow: var(--shadow-sm);
}

.contact-icon {
  width: 44px; height: 44px;
  border-radius: var(--radius-sm);
  background: var(--accent-glow);
  border: 1px solid var(--accent);
  display: flex; align-items: center; justify-content: center;
  color: var(--accent);
  flex-shrink: 0;
}
.contact-icon svg { width: 20px; height: 20px; }

.contact-label {
  display: block;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin-bottom: 2px;
}

.contact-value {
  display: block;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text);
}

/* Contact Form */
.contact-form {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-group { display: flex; flex-direction: column; gap: 7px; }

.form-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.04em;
}

.form-input, .form-textarea {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: var(--font);
  font-size: 0.92rem;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.form-input::placeholder, .form-textarea::placeholder { color: var(--text-faint); }
.form-input:focus, .form-textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
.form-textarea { resize: vertical; min-height: 130px; }

.form-note {
  font-size: 0.82rem;
  text-align: center;
  min-height: 18px;
}
.form-note.success { color: #22c55e; }
.form-note.error   { color: #ef4444; }

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  padding: 56px 0 32px;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1fr auto auto;
  align-items: start;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 32px;
}

.footer-tagline {
  margin-top: 8px;
  font-size: 0.84rem;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-links a {
  font-size: 0.84rem;
  color: var(--text-muted);
  transition: color var(--transition);
}
.footer-links a:hover { color: var(--accent); }

.footer-socials {
  display: flex;
  gap: 12px;
}

.footer-social {
  width: 38px; height: 38px;
  display: flex; align-items: center; justify-content: center;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-muted);
  transition: all var(--transition);
}
.footer-social svg { width: 16px; height: 16px; }
.footer-social:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}

.footer-bottom {
  display: flex;
  justify-content: center;
  align-items: center;
  text-align: center;
  gap: 8px;
  font-size: 0.8rem;
  color: var(--text-faint);
}

/* ============================================================
   LIGHTBOX
   ============================================================ */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(0, 0, 0, 0.10);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition);
}
.lightbox.open {
  opacity: 1;
  pointer-events: all;
}
.lightbox-img {
  max-width: 60vw;
  max-height: 70vh;
  width: auto;
  height: auto;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  object-fit: contain;
}
.lightbox-close {
  position: absolute;
  top: 24px; right: 28px;
  font-size: 1.4rem;
  color: #fff;
  background: rgba(255,255,255,0.1);
  border: none;
  width: 44px; height: 44px;
  border-radius: 50%;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: background var(--transition);
}
.lightbox-close:hover { background: rgba(255,255,255,0.2); }

/* ============================================================
   RESPONSIVE — full multi-breakpoint overhaul
   ============================================================ */

/* ── 1024px – large tablet / small laptop ── */
@media (max-width: 1024px) {
  .container { padding: 0 20px; }
  .about-grid { grid-template-columns: 300px 1fr; gap: 48px; }
  .contact-grid { gap: 40px; }
  .projects-grid { grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }
  .certs-grid    { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
}

/* ── 900px – tablet portrait ── */
@media (max-width: 900px) {
  .section { padding: 72px 0; }
  .section-header { margin-bottom: 44px; }

  /* About */
  .about-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .about-image-wrap { order: -1; }
  .about-img-frame  { width: 220px; height: 260px; }
  .about-img-decoration { width: 220px; height: 260px; }

  /* Contact */
  .contact-grid { grid-template-columns: 1fr; gap: 32px; }

  /* Footer */
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}

/* ── 768px – mobile landscape / large phone ── */
@media (max-width: 768px) {
  /* Nav – tighten inner so nothing gets cut */
  .nav-inner { padding: 0 24px; gap: 8px; }
  /* Force fixed navbar on mobile */
  .navbar {
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    width: 100% !important;
    z-index: 1001 !important;
    transform: none !important; /* Avoid stacking context issues */
  }
  /* Nav dropdown */
  .nav-links {
    position: fixed;
    top: 60px; left: 0; right: 0;
    background: var(--nav-bg);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    flex-direction: column;
    padding: 12px 16px 20px;
    gap: 4px;
    border-bottom: 1px solid var(--border);
    box-shadow: 0 8px 32px rgba(0,0,0,0.3);
    transform: translateY(-110%);
    transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.35s ease, visibility 0.35s;
    z-index: 999;
    opacity: 0;
    visibility: hidden;
  }
  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  .nav-link {
    width: 100%;
    padding: 12px 16px;
    font-size: 0.92rem;
    border-radius: var(--radius-sm);
    display: block;
  }
  .hamburger { display: flex; margin-right: 10px; }
  .theme-label { display: none; }
  .nav-logo { font-size: 1.1rem; }

  /* Theme toggle – icon only on mobile */
  .theme-toggle {
    padding: 6px 10px;
    gap: 0;
    min-width: 38px;
    justify-content: center;
  }

  /* Hero */
  .hero-content { align-items: flex-start; }
  .hero-title { font-size: clamp(1.9rem, 7.5vw, 3rem); }
  .hero-subtitle { font-size: clamp(0.95rem, 3vw, 1.25rem); }
  .hero-desc { font-size: 0.9rem; }
  .hero-cta { flex-wrap: wrap; gap: 10px; }
  .btn { padding: 11px 22px; font-size: 0.9rem; }

  /* About */
  .about-grid { grid-template-columns: 1fr; gap: 32px; text-align: center; }
  .about-image-wrap { position: relative; justify-content: center; margin-bottom: 24px; padding-bottom: 12px; }
  .about-img-frame { width: 160px; height: 160px; margin: 0 auto; }
  .about-img-decoration { 
    width: 160px; height: 160px; 
    left: 50%;
    transform: translateX(calc(-50% + 10px));
    top: 10px;
    z-index: 0;
  }
  .about-bio { font-size: 0.92rem; margin: 0 auto 18px; text-align: center; }
  .skills-grid { 
    display: grid; 
    grid-template-columns: repeat(2, 1fr); 
    gap: 24px 16px; 
    margin-top: 24px; 
    text-align: left;
  }

  /* Timeline – compact on mobile */
  .timeline-item    { grid-template-columns: 1fr; }
  .timeline-marker  { display: none; }
  .timeline-card    { padding: 14px 14px; margin-bottom: 12px; }
  .tl-header        { flex-direction: row; align-items: center; gap: 10px; flex-wrap: wrap; }
  .tl-meta          { align-items: flex-start; }
  .tl-company-wrap  { gap: 9px; }
  .tl-company-icon  { width: 34px; height: 34px; flex-shrink: 0; }
  .tl-company-icon svg { width: 15px; height: 15px; }
  .tl-role          { font-size: 0.88rem; font-weight: 700; }
  .tl-company       { font-size: 0.78rem; }
  .tl-period        { font-size: 0.72rem; }
  .tl-badge         { font-size: 0.62rem; padding: 2px 7px; }
  .tl-points        { display: none; }  /* hide bullet list on mobile */
  .tl-tags          { gap: 5px; margin-top: 8px; }
  .tl-tag           { font-size: 0.68rem; padding: 2px 8px; }

  /* Projects – 2-col, hide description so cards are compact/square */
  .projects-grid  { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .project-card   { padding: 16px 14px; gap: 10px; }
  .project-desc   { display: none; }
  .project-tech   { flex-wrap: wrap; gap: 4px; }
  .tech-tag       { font-size: 0.68rem; padding: 2px 7px; }

  /* Certs – 2-col, hide description so cards are compact/square */
  .certs-grid  { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .cert-card   { padding: 16px 14px; }
  .cert-desc   { display: none; }
  .cert-title  { font-size: 0.88rem; line-height: 1.3; }
  .cert-issuer { font-size: 0.75rem; }
  .cert-date   { font-size: 0.72rem; }

  /* Contact – 2-col grid on mobile to save vertical space */
  .contact-form      { padding: 16px 14px; gap: 12px; }
  .contact-heading   { font-size: 1.2rem; margin-bottom: 6px; }
  .contact-sub       { font-size: 0.82rem; }
  .contact-links     { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
  .contact-item      { flex-direction: column; align-items: center; text-align: center; padding: 12px; gap: 6px; }
  .contact-icon      { width: 32px; height: 32px; margin-bottom: 2px; }
  .contact-label     { font-size: 0.7rem; font-weight: 600; }
  .contact-value     { font-size: 0.75rem; }

  /* Footer */
  .footer-inner {
    grid-template-columns: 1fr;
    gap: 28px;
    text-align: center;
  }
  .footer-links {
    align-items: center;
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px;
  }
  .footer-socials { justify-content: center; }
  .footer-bottom  { justify-content: center; text-align: center; }
  
  /* Lightbox - make bigger on mobile & fix alignment */
  .lightbox-img {
    max-width: 95vw;
    max-height: 80vh;
    margin: 0 auto;
  }
  .lightbox-close {
    top: 20px;
    right: 20px;
  }
}

/* ── 640px – small phone landscape ── */
@media (max-width: 640px) {
  .section { padding: 60px 0; }
  .container { padding: 0 16px; }
  .section-header { margin-bottom: 36px; }

  /* Hero */
  .hero-title { font-size: clamp(1.7rem, 8vw, 2.4rem); }
  .hero-cta { flex-direction: column; width: 100%; gap: 10px; }
  .btn { justify-content: center; width: 100%; padding: 12px 20px; }
  .social-links { justify-content: flex-start; flex-wrap: wrap; }

  /* About image smaller */
  .about-img-frame      { width: 140px; height: 140px; }
  .about-img-decoration { width: 140px; height: 140px; transform: translateX(calc(-50% + 8px)); top: 8px; }
  .about-image-wrap { justify-content: center; }
  
  /* Skills - 2 Col Grid */
  .skills-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px 12px;
    margin-top: 24px;
  }
  .skill-group { display: flex; flex-direction: column; gap: 8px; }

  /* Section titles */
  .section-title { font-size: clamp(1.5rem, 6vw, 2rem); }

  /* Contact */
  .contact-heading { font-size: 1.3rem; }
  .contact-icon    { width: 38px; height: 38px; }
  .contact-icon svg { width: 17px; height: 17px; }
  .contact-label   { font-size: 0.68rem; }
  .contact-value   { font-size: 0.84rem; }
}

/* ── 480px – typical mobile portrait ── */
@media (max-width: 480px) {
  .section { padding: 52px 0; }
  .container { padding: 0 14px; }

  /* Timeline card */
  .timeline-card { padding: 16px 14px; }
  .tl-company-wrap { gap: 10px; }
  .tl-company-icon { width: 36px; height: 36px; }
  .tl-company-icon svg { width: 16px; height: 16px; }
  .tl-tags { gap: 6px; }
  .tl-tag  { font-size: 0.72rem; padding: 3px 9px; }

  /* Project card – keep 2-col, just tighten padding */
  .project-card   { padding: 14px 12px; gap: 10px; }
  .project-title  { font-size: 1rem; }
  .project-desc   { font-size: 0.84rem; }
  .tech-tag       { font-size: 0.7rem; padding: 2px 8px; }

  /* Cert card – keep 2-col, just tighten padding */
  .cert-card      { padding: 14px 12px; }
  .cert-title     { font-size: 0.95rem; }
  .cert-badge     { width: 40px; height: 40px; margin-bottom: 14px; }
  .cert-badge svg { width: 18px; height: 18px; }

  /* Contact form */
  .contact-form   { padding: 18px 12px; }
  .contact-item   { padding: 12px; gap: 10px; }

  /* Footer */
  .footer          { padding: 40px 0 20px; }
  .footer-tagline  { font-size: 0.78rem; }
  .footer-links a  { font-size: 0.78rem; }
  .footer-bottom   { font-size: 0.74rem; }

  /* Skills */
  .skills-grid { grid-template-columns: repeat(2, 1fr); gap: 16px 12px; }
  .skill-tag { padding: 4px 10px; font-size: 0.76rem; }
}

/* ── 380px – very small phones (iPhone SE etc.) ── */
@media (max-width: 380px) {
  .container { padding: 0 12px; }
  .hero-title { font-size: 1.6rem; }
  .nav-logo   { font-size: 1rem; }
  .btn        { font-size: 0.85rem; padding: 10px 16px; }
  .timeline-card { padding: 14px 12px; }
  .project-card  { padding: 14px 12px; }
  .cert-card     { padding: 14px 12px; }
}

/* ============================================================
   HYBRID CURSOR (Desktop Only)
   ============================================================ */
@media (min-width: 992px) {
  html, body {
    cursor: none;
  }

  /* Ensure links also don't show default cursor */
  a, button, input, textarea, .project-card, .cert-card {
    cursor: none;
  }

  /* Instant Dot */
  .cursor-dot {
    position: fixed;
    top: 0; left: 0;
    width: 6px;
    height: 6px;
    background-color: var(--text);
    border-radius: 50%;
    pointer-events: none;
    z-index: 10000;
    transform: translate(-50%, -50%);
    will-change: left, top;
  }

  /* Delayed Ring */
  .cursor-ring {
    position: fixed;
    top: 0; left: 0;
    width: 30px;
    height: 30px;
    border: 1px solid var(--accent);
    border-radius: 50%;
    pointer-events: none;
    z-index: 9999;
    transform: translate(-50%, -50%);
    transition: width 0.2s, height 0.2s, background-color 0.2s, border-color 0.2s;
    will-change: left, top;
  }

  /* Hover State */
  body.hovering .cursor-ring {
    width: 50px;
    height: 50px;
    background-color: rgba(124, 58, 237, 0.1);
    border-color: transparent;
  }
}

@media (max-width: 991px) {
  .cursor-dot, .cursor-ring {
    display: none;
  }
  html, body {
    cursor: auto;
  }
}

/* ============================================================
   3D BACKGROUND CONTAINER
   ============================================================ */
.hero {
  position: relative;
  overflow: hidden; /* Ensure background stays within */
}

#hero-canvas-container {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  overflow: hidden;
}
#hero-canvas-container canvas {
  display: block;
}

/* ============================================================
   BACK TO TOP BUTTON
   ============================================================ */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: var(--surface);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  color: var(--text);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 999;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

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

.back-to-top:hover {
  background: var(--surface-2);
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-5px);
  box-shadow: 0 15px 40px var(--accent-glow);
}

.back-to-top svg {
  width: 24px;
  height: 24px;
  transition: transform 0.3s ease;
}

.back-to-top:hover svg {
  transform: translateY(-2px);
}

@media (max-width: 768px) {
  .project-note {
    display: block;
  }
  .back-to-top {
    bottom: 30px;
    right: 50px;
    width: 44px;
    height: 44px;
  }
}