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

/* ── TOKENS ──────────────────────────────────── */
:root {
  --bg:          #ffffff;
  --bg-2:        #f5f7fa;
  --bg-3:        #eaecf0;
  --border:      #d8dce3;
  --border-dim:  rgba(216, 220, 227, 0.7);
  --text:        #1a1d23;
  --text-2:      #5a6070;
  --text-3:      #9198a5;
  --accent:      #ea580c;
  --accent-glow: color-mix(in srgb, var(--accent) 10%, transparent);
  --green:       #1a7f37;
  --sans:        'Plus Jakarta Sans', system-ui, sans-serif;
  --mono:        'JetBrains Mono', 'Courier New', monospace;
  --display:     'Bangers', 'Impact', var(--sans);
  --radius:      10px;
  --max-w:       1080px;
}

/* ── BASE ────────────────────────────────────── */
html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
p { color: var(--text-2); line-height: 1.75; }

.container {
  width: min(100% - 2rem, var(--max-w));
  margin-inline: auto;
}

/* ── NAV ─────────────────────────────────────── */
.nav-wrap {
  position: fixed;
  inset: 0 0 auto;
  z-index: 200;
  background: rgba(255, 255, 255, 0.90);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  width: min(100% - 2rem, var(--max-w));
  margin-inline: auto;
  height: 58px;
}

.nav-logo {
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.5px;
  color: var(--text);
  flex-shrink: 0;
}
.nav-logo span { color: var(--accent); }

.nav-list {
  display: flex;
  align-items: center;
  gap: 0.15rem;
  list-style: none;
}

.nav-list a {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-2);
  padding: 0.4rem 0.7rem;
  border-radius: 6px;
  transition: color 140ms, background 140ms;
}
.nav-list a:hover,
.nav-list a.active {
  color: var(--text);
  background: var(--bg-3);
}

.nav-cta {
  color: var(--accent) !important;
  border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent) !important;
  margin-left: 0.5rem;
}
.nav-cta:hover {
  background: color-mix(in srgb, var(--accent) 7%, transparent) !important;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav-toggle span {
  display: block;
  width: 100%;
  height: 1.5px;
  background: var(--text-2);
  border-radius: 2px;
  transition: 200ms;
}

/* ── HERO ─────────────────────────────────────── */
.hero {
  position: relative;
  overflow: hidden;
  padding-top: 58px;
  min-height: 100svh;
  display: flex;
  align-items: center;
}

/* Subtle dot grid */
.hero-grid-bg {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, color-mix(in srgb, var(--accent) 13%, transparent) 1px, transparent 1px);
  background-size: 32px 32px;
  mask-image: radial-gradient(ellipse 70% 80% at 50% 0%, black 20%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 70% 80% at 50% 0%, black 20%, transparent 80%);
  pointer-events: none;
}

/* Soft ambient glow */
.hero-glow {
  position: absolute;
  top: -15%;
  right: 10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, color-mix(in srgb, var(--accent) 6%, transparent) 0%, transparent 65%);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 300px 1fr;
  grid-template-rows: auto 1fr;
  grid-template-areas:
    "photo intro"
    "photo text";
  gap: 0 5rem;
  padding-block: 6rem 5rem;
}

.hero-photo-wrap { grid-area: photo; }
.hero-intro      { grid-area: intro; align-self: end; padding-bottom: 0; }
.hero-text       { grid-area: text;  align-self: start; }

/* Badge */
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--green);
  background: rgba(26, 127, 55, 0.07);
  border: 1px solid rgba(26, 127, 55, 0.22);
  border-radius: 999px;
  padding: 0.3rem 0.85rem;
  margin-bottom: 1.75rem;
  width: fit-content;
  letter-spacing: 0.02em;
}

.badge-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 6px rgba(26, 127, 55, 0.5);
  animation: pulse 2.4s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.4; transform: scale(0.8); }
}

/* Name */
.hero-name {
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.5px;
  line-height: 1.1;
  margin-bottom: 0.4rem;
}

.hero-name-vn {
  font-size: 0.75em;
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: 0;
}

/* Subtitle under name */
.hero-subtitle {
  font-size: clamp(0.85rem, 1.6vw, 1rem);
  font-weight: 400;
  font-style: italic;
  color: var(--text-2);
  line-height: 1.4;
  margin-bottom: 1rem;
  max-width: 480px;
}

/* Role tags */
.hero-roles {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.4rem;
}

.role-tag {
  display: inline-flex;
  align-items: center;
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 500;
  border-radius: 999px;
  padding: 0.3rem 0.85rem;
  letter-spacing: 0.02em;
  border: 1px solid;
}

.role-tag-blue {
  color: var(--accent);
  background: color-mix(in srgb, var(--accent) 8%, transparent);
  border-color: color-mix(in srgb, var(--accent) 25%, transparent);
}

.role-tag-purple {
  color: #7c3aed;
  background: rgba(124, 58, 237, 0.07);
  border-color: rgba(124, 58, 237, 0.22);
}

.role-tag-teal {
  color: #0d9488;
  background: rgba(13, 148, 136, 0.07);
  border-color: rgba(13, 148, 136, 0.22);
}

/* Bullet highlights */
.hero-bullets {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  margin-bottom: 2rem;
  max-width: 460px;
}

.hero-bullets li {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  font-size: 0.88rem;
  color: var(--text-2);
  line-height: 1.55;
}

.hero-bullets li svg {
  flex-shrink: 0;
  margin-top: 2px;
  color: var(--accent);
}

/* Buttons */
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-bottom: 2rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.6rem 1.4rem;
  border-radius: var(--radius);
  font-family: var(--sans);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform 140ms, box-shadow 140ms, background 140ms, border-color 140ms;
}
.btn:hover { transform: translateY(-2px); }

.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 0 0 1px var(--accent), 0 4px 18px color-mix(in srgb, var(--accent) 28%, transparent);
}
.btn-primary:hover {
  box-shadow: 0 0 0 1px var(--accent), 0 8px 28px color-mix(in srgb, var(--accent) 42%, transparent);
}

.btn-red {
  background: #dc2626;
  box-shadow: 0 0 0 1px #dc2626, 0 4px 18px rgba(220, 38, 38, 0.28);
}
.btn-red:hover {
  background: #b91c1c;
  box-shadow: 0 0 0 1px #b91c1c, 0 8px 28px rgba(220, 38, 38, 0.42);
}

.btn-ghost {
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-ghost:hover { background: var(--bg-2); border-color: var(--text-3); }

/* LinkedIn brand button */
.btn-linkedin {
  background: #0A66C2;
  color: #fff;
  box-shadow: 0 0 0 1px #0A66C2, 0 4px 18px rgba(10,102,194,0.28);
}
.btn-linkedin:hover {
  background: #004182;
  box-shadow: 0 0 0 1px #004182, 0 8px 28px rgba(10,102,194,0.42);
}

.inline-project-link {
  display: inline-flex;
  align-items: center;
  gap: 0.28rem;
  margin-inline: 0.08rem;
  vertical-align: -0.04em;
}

.inline-project-link:hover .project-title {
  color: #2a5a9b;
}

.project-logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.55rem;
  height: 1.08rem;
  border-radius: 4px;
  background: #1a3a6b;
  color: #FFD700;
  font-family: var(--display);
  font-size: 0.78rem;
  font-weight: 400;
  line-height: 1;
  letter-spacing: 0.04em;
  transform: translateY(-0.02em);
}

.project-title {
  color: #1a3a6b;
  font-size: 0.88rem;
  font-weight: 700;
  line-height: 1.1;
}

/* Meta row */
.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--text-3);
}

/* Photo */
.hero-photo-wrap {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.photo-frame {
  position: relative;
  z-index: 2;
  width: 260px;
  height: 310px;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.10), 0 2px 8px rgba(0, 0, 0, 0.06);
}
.photo-frame img { width: 100%; height: 100%; object-fit: cover; }

.photo-ring {
  position: absolute;
  border-radius: 18px;
  pointer-events: none;
}
.photo-ring-outer {
  inset: -12px;
  border: 1px solid color-mix(in srgb, var(--accent) 14%, transparent);
  background: linear-gradient(135deg, color-mix(in srgb, var(--accent) 4%, transparent), transparent 50%);
  z-index: 1;
}
.photo-ring-inner {
  inset: -22px;
  border: 1px solid color-mix(in srgb, var(--accent) 7%, transparent);
  z-index: 0;
}

/* ── SECTION SHARED ───────────────────────────── */
.section {
  padding: 6rem 0;
}
.section-alt {
  background: var(--bg-2);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.eyebrow {
  font-family: var(--mono);
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 0.6rem;
}

.section-heading {
  font-size: clamp(1.7rem, 4vw, 2.4rem);
  font-weight: 700;
  color: var(--text);
  letter-spacing: -1px;
  line-height: 1.15;
  margin-bottom: 3rem;
}

/* ── TIMELINE ─────────────────────────────────── */
.timeline {
  display: grid;
  gap: 1.25rem;
  max-width: 780px;
}

.tl-item {
  display: grid;
  grid-template-columns: 68px 1fr;
  gap: 1.5rem;
  align-items: start;
}

.tl-year {
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 500;
  color: var(--text-3);
  line-height: 1.45;
  text-align: right;
  padding-top: 1.25rem;
  white-space: nowrap;
}

.tl-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 1.25rem 1.4rem;
  transition: border-color 180ms, box-shadow 180ms;
}
.tl-card:hover {
  border-color: color-mix(in srgb, var(--accent) 45%, transparent);
  box-shadow: 0 4px 20px color-mix(in srgb, var(--accent) 6%, transparent);
}

.tl-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 0.85rem;
}

.tl-card-header-main {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.tl-logo {
  width: 56px;
  height: 36px;
  object-fit: contain;
  object-position: left center;
  flex-shrink: 0;
}

.tl-company {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.2rem;
}
.tl-formerly {
  font-size: 0.8rem;
  font-weight: 400;
  color: var(--text-muted);
}

.tl-role {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--accent);
}

.tl-domain {
  font-family: var(--mono);
  font-size: 0.68rem;
  color: var(--text-3);
  white-space: nowrap;
  padding-top: 0.2rem;
}

.tl-card p {
  font-size: 0.9rem;
  line-height: 1.7;
}

/* ── SKILLS ───────────────────────────────────── */
#skills.section {
  padding: 4rem 0;
}

.skills-table {
  display: grid;
  grid-template-columns: 6rem 1fr;
  gap: 0.9rem 1.5rem;
  align-items: start;
  max-width: 780px;
}

.skills-row {
  display: contents;
}

.skills-label {
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding-top: 0.35rem;
  white-space: nowrap;
}

.skills-label-blue   { color: var(--accent); }
.skills-label-purple { color: #7c3aed; }
.skills-label-teal   { color: #0d9488; }
.skills-label-orange { color: #ea580c; }

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.tag {
  display: inline-block;
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.28rem 0.65rem;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-2);
  transition: border-color 140ms, color 140ms;
}
.tag:hover { border-color: var(--accent); color: var(--text); }
.tag-mono { font-family: var(--mono); font-size: 0.76rem; }

/* ── CLIENTS ──────────────────────────────────── */
#clients.section {
  padding: 4rem 0;
}

.clients-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.client-card {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.45rem 0.85rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
}

.client-logo {
  width: auto;
  height: 22px;
  object-fit: contain;
}

.client-name {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-3);
  letter-spacing: -0.2px;
  white-space: nowrap;
}

/* ── EDUCATION ────────────────────────────────── */
.edu-list {
  display: grid;
  gap: 2.25rem;
  max-width: 680px;
}

.edu-item {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 1.25rem;
  align-items: start;
}

.edu-year {
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--accent);
  padding-top: 0.2rem;
}

.edu-title {
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.15rem;
}

.edu-org {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--text-3);
  margin-bottom: 0.4rem;
}

.edu-content p { font-size: 0.87rem; }

/* ── FOOTER ───────────────────────────────────── */
.footer {
  background: var(--bg-2);
  border-top: 1px solid var(--border);
  padding: 3rem 0 2rem;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 2rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1.5rem;
}

.footer-left .nav-logo { margin-bottom: 0.5rem; display: block; }
.footer-left p {
  font-size: 0.82rem;
  color: var(--text-3);
  line-height: 1.6;
}

.footer-right {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  text-align: right;
}
.footer-right a {
  font-size: 0.85rem;
  color: var(--text-2);
  transition: color 140ms;
}
.footer-right a:hover { color: var(--accent); }

.linkedin-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  color: #0A66C2 !important;
  font-weight: 600;
}
.linkedin-link:hover { color: #004182 !important; }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--text-3);
}

/* ── RESPONSIVE ───────────────────────────────── */
@media (max-width: 800px) {
  .hero-inner {
    grid-template-columns: 1fr auto;
    grid-template-rows: auto auto;
    grid-template-areas:
      "intro photo"
      "text  text";
    gap: 1.5rem 1.25rem;
    padding-block: 3rem 2.5rem;
  }
  .hero-photo-wrap { display: flex; align-items: flex-start; }
  .photo-frame { width: 110px; height: 132px; }
  .photo-ring { display: none; }
  .hero-intro { align-self: center; }
  .hero-text { padding-top: 0; }

  .tl-item {
    grid-template-columns: 52px 1fr;
    gap: 1rem;
  }
  .tl-domain { display: none; }
}

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

  .nav-list {
    position: absolute;
    top: 59px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: rgba(255, 255, 255, 0.98);
    border-bottom: 1px solid var(--border);
    padding: 0.5rem 1rem 1rem;
    display: none;
  }
  .nav-list.open { display: flex; }
  .nav-cta { margin-left: 0; margin-top: 0.35rem; }

  .section { padding: 4rem 0; }
  .section-heading { margin-bottom: 2rem; }

  .tl-item {
    grid-template-columns: 1fr;
    gap: 0.35rem;
  }
  .tl-year {
    text-align: left;
    padding-top: 0;
  }
  .tl-card {
    border-left-width: 3px;
    border-radius: 0 var(--radius) var(--radius) 0;
  }

  .skills-table { grid-template-columns: 5rem 1fr; }

  .footer-inner { flex-direction: column; }
  .footer-right { text-align: left; }
  .footer-bottom { flex-direction: column; gap: 0.3rem; }
}

@media (max-width: 400px) {
  .skills-table { grid-template-columns: 1fr; }
  .skills-label { padding-top: 0; padding-bottom: 0.2rem; }
}