:root {
  --bg:           #ffffff;
  --bg-alt:       #F8FAFC;
  --border:       #E2E8F0;
  --text:         #1E293B;
  --text-muted:   #64748B;
  --accent:       #2563EB;
  --accent-hover: #1D4ED8;
  --accent-light: #EFF6FF;
  --secondary:       #25eb3f;
  --secondary-hover: #1dd849;
  --secondary-light: #effff6;
  --nav-h:        64px;
  --max-w:        960px;
  --radius:       10px;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

body {
  font-family: 'Inter', system-ui, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
  font-size: 16px;
}

/* ─── Nav ─── */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  height: var(--nav-h);
  display: flex;
  align-items: center;
}

.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-weight: 700;
  font-size: 0.9375rem;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.02em;
  opacity: 0;
  transform: translateX(-6px);
  transition: opacity 0.3s, transform 0.3s;
  pointer-events: none;
}

nav.scrolled .nav-logo {
  opacity: 1;
  transform: translateX(0);
  pointer-events: auto;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.nav-links {
  display: flex;
  gap: 28px;
  list-style: none;
}

.nav-links a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.15s;
}

.nav-links a:hover { color: var(--accent); }

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.nav-avatar {
  width: 30px;
  height: 30px;
  border-radius: 30%;
  object-fit: cover;
  object-position: center;
  border: 2px solid var(--border);
  opacity: 0;
  transform: scale(0.6);
  transition: opacity 0.3s, transform 0.3s;
  pointer-events: none;
}

nav.scrolled .nav-avatar {
  opacity: 1;
  transform: scale(1);
}

.lang-toggle {
  font-size: 1.25rem;
  line-height: 1;
  padding: 3px 6px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: transparent;
  cursor: pointer;
  transition: border-color 0.15s, transform 0.15s;
  flex-shrink: 0;
}

.lang-toggle:hover { border-color: var(--accent); transform: scale(1.1); }

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s, transform 0.15s;
  flex-shrink: 0;
  padding: 0;
}
.theme-toggle:hover { border-color: var(--accent); color: var(--accent); transform: scale(1.1); }
.theme-toggle svg { width: 16px; height: 16px; pointer-events: none; }

/* ─── Layout helpers ─── */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

.section-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 6px;
}

.section-title {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text);
  margin-bottom: 48px;
}

/* ─── Buttons ─── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: 8px;
  font-size: 0.875rem;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.15s;
  cursor: pointer;
  border: none;
}

.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); }

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

.icon { width: 16px; height: 16px; flex-shrink: 0; }

/* ─── Hero ─── */
.hero {
  padding: 96px 0 80px;
  background: var(--bg);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('../img/bg.jpeg') center / cover no-repeat;
  opacity: 0.1;
  z-index: 0;
}

.hero .container { position: relative; z-index: 1; }

.hero-eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--accent);
  margin-bottom: 20px;
}

.hero-eyebrow::before {
  content: '';
  width: 28px;
  height: 2px;
  background: var(--accent);
  flex-shrink: 0;
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.25rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.1;
  margin-bottom: 20px;
}

.hero-subtitle {
  font-size: 1.125rem;
  color: var(--text-muted);
  max-width: 540px;
  margin-bottom: 32px;
  line-height: 1.7;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 40px;
}

.pill {
  font-size: 0.8125rem;
  font-weight: 500;
  padding: 4px 14px;
  border-radius: 9999px;
  background: var(--accent-light);
  color: var(--accent);
}

.hero-cta {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* ─── About ─── */
#about { padding: 80px 0; background: var(--bg-alt); }

.about-grid {
  display: grid;
  grid-template-columns: 1fr 260px;
  gap: 64px;
  align-items: start;
}

.about-text p {
  color: var(--text-muted);
  font-size: 1.0625rem;
  margin-bottom: 16px;
}

.about-text p:last-child { margin-bottom: 0; }

.about-sidebar {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.sidebar-block { display: flex; flex-direction: column; gap: 3px; }

.sidebar-label {
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.sidebar-value {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text);
}

.sidebar-value small {
  display: block;
  font-weight: 400;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.lang-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.875rem;
  padding: 2px 0;
}

.lang-row span:last-child { color: var(--text-muted); }

/* ─── Experience ─── */
#experience { padding: 80px 0; background: var(--bg); }

.timeline { position: relative; padding-left: 28px; }

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  bottom: 0;
  width: 2px;
  background: var(--border);
}

.tl-item { position: relative; padding-bottom: 40px; }
.tl-item:last-child { padding-bottom: 0; }

.tl-dot {
  position: absolute;
  left: -34px;
  top: 7px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--bg);
}

.tl-item:first-child .tl-dot {
  box-shadow: 0 0 0 4px var(--accent-light);
}

.tl-role {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
}

.tl-company {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--accent);
  margin-bottom: 3px;
}

.tl-meta {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.tl-bullets { list-style: none; display: flex; flex-direction: column; gap: 5px; }

.tl-bullets li {
  font-size: 0.9375rem;
  color: var(--text-muted);
  padding-left: 16px;
  position: relative;
}

.tl-bullets li::before {
  content: '–';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 500;
}

/* ─── Skills ─── */
#skills { padding: 80px 0; background: var(--bg-alt); }

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 36px;
}

.skill-group h3 {
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 12px;
}

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

.tag {
  font-size: 0.8125rem;
  font-weight: 500;
  padding: 5px 13px;
  border-radius: 7px;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  transition: border-color 0.15s, color 0.15s;
}

.tag:hover { border-color: var(--accent); color: var(--accent); }

/* ─── Projects ─── */
#projects { padding: 80px 0; background: var(--bg); }

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}

.project-card {
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-alt);
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: box-shadow 0.2s, border-color 0.2s, transform 0.2s;
}

.project-card:hover {
  box-shadow: 0 6px 24px rgba(0,0,0,0.07);
  border-color: var(--accent);
  transform: translateY(-2px);
}

.project-header {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-wrap: wrap;
}

.project-name {
  font-size: 1rem;
  font-weight: 600;
}

a.project-name {
  color: inherit;
  text-decoration: none;
}
a.project-name:hover { color: var(--accent); }

.project-company {
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--accent);
  background: var(--accent-light);
  padding: 2px 8px;
  border-radius: 9999px;
}

.project-customer {
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--secondary);
  background: var(--secondary-light);
  padding: 2px 8px;
  border-radius: 9999px;
}

.project-date {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 2px;
}

.project-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.65;
  flex: 1;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 4px;
}

.project-tags .tag { font-size: 0.75rem; padding: 3px 10px; }

.minor-title {
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin: 48px 0 20px;
  display: flex;
  align-items: center;
  gap: 14px;
}

.minor-title::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

/* ─── Highlights ─── */
#highlights { padding: 80px 0; background: var(--bg-alt); }

.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
  gap: 20px;
}

.card {
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg);
  transition: box-shadow 0.2s, border-color 0.2s, transform 0.2s;
}

.card:hover {
  box-shadow: 0 6px 24px rgba(0,0,0,0.07);
  border-color: var(--accent);
  transform: translateY(-2px);
}

.card-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--accent-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.125rem;
  margin-bottom: 16px;
}

.card h3 {
  font-size: 0.9375rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.card p {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* ─── Contact ─── */
#contact { padding: 80px 0; background: var(--bg); }

.contact-inner {
  text-align: center;
  max-width: 520px;
  margin: 0 auto;
}

.contact-inner h2 {
  font-size: 1.875rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 14px;
}

.contact-inner p {
  color: var(--text-muted);
  font-size: 1.0625rem;
  margin-bottom: 36px;
}

.contact-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
}

/* ─── Footer ─── */
footer {
  border-top: 1px solid var(--border);
  padding: 20px 24px;
  text-align: center;
  font-size: 0.8125rem;
  color: var(--text-muted);
}

/* ─── Profile photo ─── */
.hero-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 48px;
}

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

.profile-photo {
  width: 220px;
  height: 220px;
  border-radius: 10%;
  object-fit: cover;
  object-position: center;
  border: 3px solid var(--border);
  flex-shrink: 0;
  display: block;
}

/* ─── Dark mode ─── */
/* System preference — skipped if user manually chose light */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg:           #0F172A;
    --bg-alt:       #1E293B;
    --border:       #334155;
    --text:         #F1F5F9;
    --text-muted:   #94A3B8;
    --accent:       #60A5FA;
    --accent-hover: #93C5FD;
    --accent-light: #1E3A5F;
    --secondary:       #60fa89;
    --secondary-hover: #93fda8;
    --secondary-light: #1e5f2b;
  }

  :root:not([data-theme="light"]) nav { background: rgba(15, 23, 42, 0.92); }
}

/* Manual override — always wins regardless of system preference */
:root[data-theme="dark"] {
  --bg:           #0F172A;
  --bg-alt:       #1E293B;
  --border:       #334155;
  --text:         #F1F5F9;
  --text-muted:   #94A3B8;
  --accent:       #60A5FA;
  --accent-hover: #93C5FD;
  --accent-light: #1E3A5F;
  --secondary:       #60fa89;
  --secondary-hover: #93fda8;
  --secondary-light: #1e5f2b;
}
:root[data-theme="dark"] nav { background: rgba(15, 23, 42, 0.92); }

/* ─── Responsive ─── */
@media (max-width: 700px) {
  .nav-links { display: none; }
  .hero { padding: 72px 0 60px; }
  .hero h1 { font-size: 2rem; }
  .hero-inner { flex-direction: column-reverse; gap: 32px; }
  .profile-photo { width: 120px; height: 120px; }
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .section-title { margin-bottom: 32px; }
  #about, #experience, #skills, #projects, #highlights, #contact { padding: 60px 0; }
}