*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg: #0c0c14;
  --bg-surface: #12121c;
  --bg-card: #181824;
  --bg-card-hover: #1e1e2e;
  --text: #e8e8f0;
  --text-secondary: #a0a0b8;
  --text-muted: #6a6a82;
  --accent: #34d399;
  --accent-dim: rgba(52,211,153,.12);
  --accent-glow: rgba(52,211,153,.25);
  --border: rgba(255,255,255,.06);
  --border-hover: rgba(255,255,255,.12);
  --card-shadow: 0 1px 3px rgba(0,0,0,.3), 0 8px 24px rgba(0,0,0,.2);
  --card-shadow-hover: 0 2px 8px rgba(0,0,0,.4), 0 16px 48px rgba(0,0,0,.25);
  --header-bg: rgba(12,12,20,.7);
  --hero-photo-border: rgba(52,211,153,.3);
  --grid-line: rgba(255,255,255,.02);
  --radius: 14px;
  --max-w: 880px;
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

[data-theme="light"] {
  --bg: #f8f9fc;
  --bg-surface: #f0f1f5;
  --bg-card: #ffffff;
  --bg-card-hover: #f5f5fa;
  --text: #111118;
  --text-secondary: #44445a;
  --text-muted: #7a7a90;
  --accent: #0d9668;
  --accent-dim: rgba(13,150,104,.1);
  --accent-glow: rgba(13,150,104,.2);
  --border: rgba(0,0,0,.08);
  --border-hover: rgba(0,0,0,.14);
  --card-shadow: 0 1px 3px rgba(0,0,0,.06), 0 4px 16px rgba(0,0,0,.04);
  --card-shadow-hover: 0 4px 12px rgba(0,0,0,.08), 0 12px 40px rgba(0,0,0,.06);
  --header-bg: rgba(248,249,252,.75);
  --hero-photo-border: rgba(13,150,104,.25);
  --grid-line: rgba(0,0,0,.04);
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  transition: background .4s ease, color .3s ease;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color .2s;
}

a:hover {
  color: #6ee7b7;
}

[data-theme="light"] a:hover {
  color: #059669;
}

::selection {
  background: var(--accent);
  color: var(--bg);
}

/* ── BACKGROUND ── */

.bg-grid {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 30%, black, transparent);
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 30%, black, transparent);
  transition: background-image .4s;
}

.bg-glow {
  position: fixed;
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
  filter: blur(100px);
  transition: background .4s;
}

.bg-glow-1 {
  width: 600px;
  height: 600px;
  top: -10%;
  right: -8%;
  background: rgba(52,211,153,.07);
  animation: float1 20s ease-in-out infinite;
}

.bg-glow-2 {
  width: 500px;
  height: 500px;
  bottom: 10%;
  left: -10%;
  background: rgba(99,102,241,.06);
  animation: float2 25s ease-in-out infinite;
}

.bg-glow-3 {
  width: 350px;
  height: 350px;
  top: 50%;
  left: 40%;
  background: rgba(244,114,182,.04);
  animation: float3 18s ease-in-out infinite;
}

[data-theme="light"] .bg-glow-1 {
  background: rgba(13,150,104,.06);
}

[data-theme="light"] .bg-glow-2 {
  background: rgba(99,102,241,.04);
}

[data-theme="light"] .bg-glow-3 {
  background: rgba(244,114,182,.03);
}

@keyframes float1 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(-30px, 40px) scale(1.05); }
  66% { transform: translate(20px, -20px) scale(.95); }
}

@keyframes float2 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(40px, -30px) scale(1.08); }
}

@keyframes float3 {
  0%, 100% { transform: translate(0, 0); }
  40% { transform: translate(-25px, 25px); }
  80% { transform: translate(15px, -15px); }
}

/* ── HEADER ── */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--header-bg);
  backdrop-filter: blur(16px) saturate(1.4);
  -webkit-backdrop-filter: blur(16px) saturate(1.4);
  border-bottom: 1px solid var(--border);
  transition: background .4s, border-color .4s;
}

nav {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 58px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: relative;
  z-index: 1;
}

.logo {
  display: flex;
  align-items: center;
  gap: .65rem;
  transition: transform .3s cubic-bezier(.25,.8,.25,1);
}

.logo:hover {
  transform: rotate(-4deg) scale(1.08);
}

.logo-svg {
  width: 30px;
  height: 30px;
}

.logo-svg rect {
  fill: var(--accent);
  transition: opacity .3s ease, fill .3s;
}

.logo-check {
  stroke: var(--text);
  stroke-width: 2;
  fill: none;
  stroke-dasharray: 12;
  stroke-dashoffset: 12;
  transition: stroke-dashoffset .4s ease, stroke .3s;
}

.logo:hover .logo-check {
  stroke-dashoffset: 0;
  stroke: var(--accent);
}

.logo:hover rect {
  opacity: 1 !important;
}

.logo-text {
  font-weight: 700;
  font-size: .95rem;
  color: var(--text);
  letter-spacing: -.02em;
  transition: color .3s;
}

.logo:hover .logo-text {
  color: var(--accent);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  font-size: .875rem;
  font-weight: 500;
}

.nav-links a {
  color: var(--text-muted);
  position: relative;
  transition: color .25s;
}

.nav-links a:not(.nav-cta):hover {
  color: var(--text);
}

.nav-links a:not(.nav-cta)::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  border-radius: 1px;
  transition: width .3s cubic-bezier(.25,.8,.25,1);
}

.nav-links a:not(.nav-cta):hover::after {
  width: 100%;
}

/* ── THEME TOGGLE ── */

.theme-toggle {
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-muted);
  width: 36px;
  height: 36px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all .3s cubic-bezier(.25,.8,.25,1);
  position: relative;
}

.theme-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: rotate(15deg) scale(1.08);
}

.icon-sun {
  display: none;
}

[data-theme="light"] .icon-moon {
  display: none;
}

[data-theme="light"] .icon-sun {
  display: block;
}

.nav-cta {
  background: var(--accent);
  color: var(--bg) !important;
  padding: .45rem 1.1rem;
  border-radius: 8px;
  font-size: .8rem;
  font-weight: 600;
  transition: all .25s cubic-bezier(.25,.8,.25,1);
}

.nav-cta:hover {
  background: #6ee7b7;
  transform: translateY(-1px);
  box-shadow: 0 4px 16px var(--accent-glow);
  color: var(--bg) !important;
}

[data-theme="light"] .nav-cta:hover {
  background: #059669;
}

/* ── HERO ── */

.hero {
  min-height: 85vh;
  display: flex;
  align-items: center;
  position: relative;
}

.hero-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 5rem 1.5rem;
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 4rem;
}

.hero-content {
  flex: 1;
  min-width: 0;
}

.hero-photo {
  flex-shrink: 0;
  opacity: 0;
  animation: slideIn .8s .15s forwards;
}

.hero-photo img {
  width: 180px;
  height: 180px;
  object-fit: cover;
  border-radius: 50%;
  border: 3px solid var(--hero-photo-border);
  box-shadow: 0 0 40px var(--accent-dim), var(--card-shadow);
  transition: transform .4s cubic-bezier(.25,.8,.25,1), box-shadow .4s;
}

.hero-photo:hover img {
  transform: scale(1.06);
  box-shadow: 0 0 60px var(--accent-glow), var(--card-shadow-hover);
}

.hero-label {
  font-size: .9rem;
  color: var(--accent);
  font-weight: 500;
  margin-bottom: .75rem;
  opacity: 0;
  animation: slideIn .8s .2s forwards;
}

.hero h1 {
  font-size: clamp(3rem, 8vw, 5rem);
  font-weight: 700;
  letter-spacing: -.04em;
  line-height: 1.05;
  opacity: 0;
  animation: slideIn .8s .35s forwards;
}

.hero-subtitle {
  font-size: clamp(1.05rem, 2.5vw, 1.35rem);
  color: var(--text-secondary);
  margin-top: 1rem;
  font-weight: 500;
  opacity: 0;
  animation: slideIn .8s .5s forwards;
}

.hero-bullets {
  list-style: none;
  margin-top: 2rem;
  display: flex;
  flex-direction: column;
  gap: .5rem;
  opacity: 0;
  animation: slideIn .8s .65s forwards;
}

.hero-bullets li {
  font-size: .95rem;
  color: var(--text-muted);
  padding-left: 1.5rem;
  position: relative;
}

.hero-bullets li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .6em;
  width: 7px;
  height: 7px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--accent-glow);
}

.hero-actions {
  margin-top: 2.5rem;
  display: flex;
  gap: .75rem;
  flex-wrap: wrap;
  opacity: 0;
  animation: slideIn .8s .8s forwards;
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.btn-primary,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .75rem 1.5rem;
  font-size: .875rem;
  font-weight: 600;
  font-family: var(--font);
  border-radius: 10px;
  transition: all .3s cubic-bezier(.25,.8,.25,1);
  cursor: pointer;
}

.btn-primary {
  background: var(--accent);
  color: var(--bg);
  box-shadow: 0 2px 12px var(--accent-glow);
}

.btn-primary:hover {
  background: #6ee7b7;
  color: var(--bg);
  transform: translateY(-3px);
  box-shadow: 0 6px 24px var(--accent-glow);
}

[data-theme="light"] .btn-primary:hover {
  background: #059669;
  color: #fff;
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  border-color: var(--accent);
  background: var(--bg-card-hover);
  transform: translateY(-3px);
  box-shadow: 0 4px 16px rgba(0,0,0,.15);
  color: var(--text);
}

/* ── SECTIONS ── */

.section {
  padding: 5rem 0;
  position: relative;
  z-index: 1;
}

.section-alt {
  background: var(--bg-surface);
  transition: background .4s;
}

.section-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section-label {
  font-size: .8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .12em;
  color: var(--accent);
  margin-bottom: 2rem;
}

.subsection-title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 1rem;
  margin-top: 2.5rem;
}

/* ── ABOUT ── */

.about-text {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 600px;
  line-height: 1.8;
}

.certs-grid {
  display: grid;
  gap: .75rem;
}

.cert-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.1rem 1.4rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all .3s cubic-bezier(.25,.8,.25,1);
  color: var(--text);
}

.cert-card:hover {
  border-color: var(--accent-glow);
  box-shadow: var(--card-shadow-hover), 0 0 20px var(--accent-dim);
  color: var(--text);
  background: var(--bg-card-hover);
}

.cert-badge {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: #34d399;
  color: #0c0c14;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: .6rem;
  font-weight: 700;
  letter-spacing: .02em;
  transition: all .3s ease;
}

.cert-badge-sec {
  background: #2dd4bf;
}

.cert-badge-npb {
  background: #5eead4;
}

.cert-card:hover .cert-badge {
  transform: scale(1.12);
  box-shadow: 0 0 16px rgba(52,211,153,.3);
}

.cert-card:hover .cert-badge-sec {
  box-shadow: 0 0 16px rgba(45,212,191,.3);
}

.cert-card:hover .cert-badge-npb {
  box-shadow: 0 0 16px rgba(94,234,212,.3);
}

[data-theme="light"] .cert-badge {
  background: #0d9668;
  color: #fff;
}

[data-theme="light"] .cert-badge-sec {
  background: #0d9488;
}

[data-theme="light"] .cert-badge-npb {
  background: #14b8a6;
}

.cert-name {
  display: block;
  font-weight: 600;
  font-size: .9rem;
}

.cert-issuer {
  display: block;
  font-size: .78rem;
  color: var(--text-muted);
  margin-top: .1rem;
}

/* ── SKILLS ── */

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

.skill-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: all .35s cubic-bezier(.25,.8,.25,1);
}

.skill-card:hover {
  border-color: var(--accent-glow);
  box-shadow: var(--card-shadow-hover), 0 0 24px var(--accent-dim);
  background: var(--bg-card-hover);
}

.skill-icon-wrap {
  width: 44px;
  height: 44px;
  border-radius: 11px;
  background: var(--accent-dim);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
  transition: all .3s ease;
}

.skill-card:hover .skill-icon-wrap {
  background: var(--accent-glow);
  transform: scale(1.08);
}

.skill-card h3 {
  font-size: .95rem;
  font-weight: 600;
  margin-bottom: .35rem;
}

.skill-card p {
  font-size: .82rem;
  color: var(--text-muted);
  line-height: 1.55;
}

/* ── EXPERIENCE / TIMELINE ── */

.timeline {
  position: relative;
  padding-left: 2.5rem;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent), var(--border));
  border-radius: 1px;
}

.timeline-item {
  position: relative;
  padding-bottom: 2.5rem;
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-marker {
  position: absolute;
  left: -2.5rem;
  top: 8px;
}

.timeline-dot {
  display: block;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--bg);
  border: 3px solid var(--accent);
  transition: all .3s ease;
}

.timeline-item:hover .timeline-dot {
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent-glow);
  transform: scale(1.15);
}

.timeline-item:first-child .timeline-dot {
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent-glow);
}

.timeline-content {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: all .3s cubic-bezier(.25,.8,.25,1);
}

.timeline-item:hover .timeline-content {
  border-color: var(--accent-glow);
  box-shadow: var(--card-shadow-hover);
  background: var(--bg-card-hover);
}

.timeline-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  flex-wrap: wrap;
}

.timeline-header h3 {
  font-size: 1rem;
  font-weight: 600;
}

.company {
  font-size: .88rem;
  margin-top: .15rem;
}

.location {
  color: var(--text-muted);
  font-size: .82rem;
}

.dates {
  font-size: .78rem;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-dim);
  padding: .25rem .85rem;
  border-radius: 100px;
  white-space: nowrap;
}

.timeline-content ul {
  padding-left: 1.2rem;
  margin-top: 1rem;
  font-size: .88rem;
  color: var(--text-secondary);
}

.timeline-content li + li {
  margin-top: .35rem;
}

/* ── FOOTER ── */

.site-footer {
  border-top: 1px solid var(--border);
  position: relative;
  z-index: 1;
  transition: border-color .4s;
}

.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 2.5rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: .8rem;
  color: var(--text-muted);
}

/* ── HOVER LIFT ── */

.hover-lift {
  transition: transform .3s cubic-bezier(.25,.8,.25,1);
}

.hover-lift:hover {
  transform: translateY(-4px);
}

/* ── SCROLL ANIMATIONS ── */

.fade-up {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity .7s cubic-bezier(.25,.8,.25,1), transform .7s cubic-bezier(.25,.8,.25,1);
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── RESPONSIVE ── */

@media (max-width: 768px) {
  .hero-inner {
    flex-direction: column;
    text-align: center;
    gap: 2.5rem;
    padding: 3rem 1.25rem;
  }

  .hero {
    min-height: auto;
    padding-top: 2rem;
  }

  .hero-photo img {
    width: 130px;
    height: 130px;
  }

  .hero-bullets {
    text-align: left;
  }

  .section {
    padding: 3.5rem 0;
  }

  .about-text {
    font-size: 1rem;
  }

  .subsection-title {
    margin-top: 2rem;
  }
}

@media (max-width: 640px) {
  .hamburger {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: 58px;
    left: 0;
    right: 0;
    background: var(--header-bg);
    backdrop-filter: blur(16px) saturate(1.4);
    -webkit-backdrop-filter: blur(16px) saturate(1.4);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    align-items: stretch;
    padding: 1rem 1.5rem 1.5rem;
    gap: 0;
    transform: translateY(-110%);
    opacity: 0;
    transition: transform .35s cubic-bezier(.25,.8,.25,1), opacity .3s ease;
    z-index: 99;
  }

  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
  }

  .nav-links a,
  .nav-links button {
    display: block;
    width: 100%;
    text-align: left;
    padding: .85rem 0;
    font-size: 1rem;
    border-bottom: 1px solid var(--border);
  }

  .nav-links a:not(.nav-cta)::after {
    display: none;
  }

  .nav-links .theme-toggle {
    width: 100%;
    justify-content: flex-start;
    gap: .75rem;
    border-radius: 0;
    border: none;
    border-bottom: 1px solid var(--border);
  }

  .nav-links .nav-cta {
    text-align: center;
    margin-top: .5rem;
    padding: .65rem 1rem;
    border-radius: 8px;
    border-bottom: none;
  }

  .hero h1 {
    font-size: clamp(2.2rem, 10vw, 2.8rem);
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .hero-actions {
    flex-direction: column;
  }

  .btn-primary,
  .btn-secondary {
    justify-content: center;
    width: 100%;
  }

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

  .timeline {
    padding-left: 2rem;
  }

  .timeline-marker {
    left: -2rem;
  }

  .timeline-header {
    flex-direction: column;
  }

  .timeline-content {
    padding: 1.25rem;
  }

  .cert-badge {
    width: 38px;
    height: 38px;
    font-size: .55rem;
  }

  .footer-inner {
    flex-direction: column;
    gap: .5rem;
    text-align: center;
  }

  .section {
    padding: 3rem 0;
  }

  .section-inner {
    padding: 0 1.15rem;
  }

  .bg-glow-1 { width: 300px; height: 300px; }
  .bg-glow-2 { width: 250px; height: 250px; }
  .bg-glow-3 { display: none; }
}

/* ── HAMBURGER ── */

.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  padding: 7px;
  background: none;
  border: none;
  cursor: pointer;
  z-index: 101;
}

.hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all .3s ease;
}

.hamburger.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}