/* =========================================================
   TOKENS
========================================================= */
:root {
  --bg: #F7F9FC;
  --surface: #FFFFFF;
  --surface-hover: #EEF2F9;
  --border: #DDE3ED;
  --text-primary: #131B2C;
  --text-secondary: #4B5670;
  --accent: #0FA968;
  --accent-soft: #E2F6ED;
  --accent-secondary: #2E6BE6;
  --shadow: 0 1px 2px rgba(19, 27, 44, 0.04), 0 8px 24px rgba(19, 27, 44, 0.05);

  --font-display: "Space Grotesk", "Inter", sans-serif;
  --font-body: "Inter", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", monospace;

  --radius: 10px;
  --max-width: 1080px;
  --transition: 180ms ease;
}

[data-theme="dark"] {
  --bg: #0B1120;
  --surface: #141B2E;
  --surface-hover: #1B2440;
  --border: #263250;
  --text-primary: #E4E9F2;
  --text-secondary: #97A3C2;
  --accent: #3DDC97;
  --accent-soft: rgba(61, 220, 151, 0.12);
  --accent-secondary: #4C8DFF;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.2), 0 12px 30px rgba(0, 0, 0, 0.35);
}

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

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text-primary);
  font-family: var(--font-body);
  line-height: 1.6;
  transition: background var(--transition), color var(--transition);
}

img { max-width: 100%; display: block; }

a {
  color: inherit;
  text-decoration: none;
}

ul { list-style: none; margin: 0; padding: 0; }

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.2;
  margin: 0;
}

h2 { font-size: clamp(1.6rem, 2.4vw, 2.1rem); }
h3 { font-size: 1.1rem; }

p { margin: 0; }

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--accent);
  color: #0B1120;
  padding: 10px 16px;
  border-radius: 0 0 8px 0;
  z-index: 200;
  font-weight: 600;
}
.skip-link:focus {
  left: 0;
}

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

/* =========================================================
   LAYOUT HELPERS
========================================================= */
.section {
  padding: 88px 24px;
  border-top: 1px solid var(--border);
}

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

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 10px;
}

.subsection-title {
  margin-top: 40px;
  margin-bottom: 20px;
  color: var(--text-secondary);
}

/* =========================================================
   HEADER
========================================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
}
.logo-dot { color: var(--accent); }

.main-nav ul {
  display: flex;
  gap: 28px;
}

.main-nav a {
  font-size: 0.92rem;
  color: var(--text-secondary);
  transition: color var(--transition);
}
.main-nav a:hover { color: var(--text-primary); }

.header-controls {
  display: flex;
  align-items: center;
  gap: 14px;
}

.lang-switch {
  display: flex;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}

.lang-btn {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  background: transparent;
  border: none;
  color: var(--text-secondary);
  padding: 6px 10px;
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
}
.lang-btn + .lang-btn { border-left: 1px solid var(--border); }
.lang-btn:hover { background: var(--surface-hover); }
.lang-btn.is-active {
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 600;
}

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-secondary);
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
}
.theme-toggle:hover { background: var(--surface-hover); color: var(--text-primary); }

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

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
}
.nav-toggle span {
  width: 16px;
  height: 2px;
  background: var(--text-primary);
  margin: 0 auto;
  transition: transform var(--transition), opacity var(--transition);
}

/* =========================================================
   HERO
========================================================= */
.hero {
  padding: 72px 24px 96px;
}

.hero-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.4fr 0.8fr;
  gap: 48px;
  align-items: center;
}

.status-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 6px 12px;
  border-radius: 999px;
  margin-bottom: 22px;
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
}

.hero-text h1 {
  font-size: clamp(1.9rem, 4vw, 2.7rem);
  margin-bottom: 12px;
}

.hero-role {
  color: var(--text-secondary);
  font-size: 1.05rem;
  margin-bottom: 14px;
}

.hero-tagline {
  max-width: 46ch;
  color: var(--text-secondary);
  margin-bottom: 18px;
}

.hero-location {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 30px;
}

.hero-actions {
  display: flex;
  gap: 14px;
  margin-bottom: 28px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  padding: 12px 22px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.92rem;
  transition: transform var(--transition), background var(--transition), border-color var(--transition);
  border: 1px solid transparent;
}
.btn:hover { transform: translateY(-1px); }

.btn-primary {
  background: var(--accent);
  color: #0B1120;
}
.btn-primary:hover { background: color-mix(in srgb, var(--accent) 88%, white); }

.btn-outline {
  border-color: var(--border);
  color: var(--text-primary);
}
.btn-outline:hover { background: var(--surface-hover); }

.hero-social {
  display: flex;
  gap: 16px;
}
.hero-social a {
  color: var(--text-secondary);
  transition: color var(--transition);
}
.hero-social a:hover { color: var(--accent); }

.hero-media {
  display: flex;
  justify-content: center;
}

.hero-photo-frame {
  width: 240px;
  height: 240px;
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.hero-photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* =========================================================
   ABOUT
========================================================= */
.about-text {
  max-width: 62ch;
  font-size: 1.05rem;
  color: var(--text-secondary);
}

/* =========================================================
   TIMELINE (Experience & Education)
========================================================= */
.timeline {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-top: 32px;
  border-left: 2px solid var(--border);
}

.timeline-item {
  position: relative;
  padding: 0 0 40px 32px;
}
.timeline-item:last-child { padding-bottom: 0; }

.timeline-item::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 4px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--accent);
}

.timeline-item.is-planned::before {
  border-style: dashed;
  background: transparent;
}

.timeline-period {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  margin-bottom: 6px;
  display: block;
}

.timeline-role {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.1rem;
}

.timeline-company {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 10px;
}

.timeline-bullets {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.timeline-bullets li {
  position: relative;
  padding-left: 18px;
  color: var(--text-secondary);
  font-size: 0.95rem;
}
.timeline-bullets li::before {
  content: "\2013";
  position: absolute;
  left: 0;
  color: var(--accent-secondary);
}

.planned-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent-secondary);
  background: color-mix(in srgb, var(--accent-secondary) 12%, transparent);
  padding: 3px 9px;
  border-radius: 999px;
  margin-left: 10px;
  vertical-align: middle;
}

/* =========================================================
   CERTIFICATIONS
========================================================= */
.cert-list {
  margin-top: 32px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.cert-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color var(--transition), background var(--transition);
}
.cert-item:hover { border-color: var(--accent); }

.cert-name {
  font-weight: 600;
  font-size: 0.98rem;
}
.cert-issuer {
  display: block;
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 3px;
}

.cert-link {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-secondary);
  white-space: nowrap;
  border: 1px solid var(--border);
  padding: 7px 12px;
  border-radius: 6px;
  transition: background var(--transition);
}
.cert-link:hover { background: var(--surface-hover); }

/* =========================================================
   SKILLS
========================================================= */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

.skill-category {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}

.skill-category h4 {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent);
  margin: 0 0 14px;
}

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

.skill-tag {
  font-size: 0.85rem;
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--surface-hover);
  color: var(--text-primary);
  border: 1px solid var(--border);
}

.soft-skills-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.soft-skills-list li {
  font-size: 0.9rem;
  padding: 9px 16px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--text-secondary);
}

/* =========================================================
   PROJECTS
========================================================= */
.projects-grid {
  margin-top: 32px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.project-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: transform var(--transition), border-color var(--transition);
}
.project-card:hover {
  transform: translateY(-3px);
  border-color: var(--accent);
}

.project-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.05rem;
}

.project-desc {
  color: var(--text-secondary);
  font-size: 0.92rem;
  flex-grow: 1;
}

.project-stack {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-secondary);
}
.project-stack strong {
  color: var(--accent-secondary);
  font-weight: 500;
}

.project-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent-secondary);
  margin-top: 4px;
}
.project-link:hover { text-decoration: underline; }

/* =========================================================
   LANGUAGES
========================================================= */
.languages-grid {
  margin-top: 32px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
}

.language-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.language-name { font-weight: 600; }
.language-level {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 4px 10px;
  border-radius: 999px;
}

/* =========================================================
   CONTACT
========================================================= */
.contact-text {
  max-width: 56ch;
  color: var(--text-secondary);
  margin-top: 4px;
}

.contact-cards {
  margin-top: 32px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}

.contact-card {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--accent-secondary);
  transition: border-color var(--transition), transform var(--transition);
}
.contact-card:hover {
  border-color: var(--accent-secondary);
  transform: translateY(-2px);
}
.contact-card strong {
  display: block;
  color: var(--text-primary);
  font-size: 0.95rem;
}
.contact-card em {
  display: block;
  font-style: normal;
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-top: 2px;
}

/* =========================================================
   FOOTER
========================================================= */
.site-footer {
  text-align: center;
  padding: 28px 24px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  border-top: 1px solid var(--border);
}

/* =========================================================
   RESPONSIVE
========================================================= */
@media (max-width: 860px) {
  .hero-inner {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .hero-location, .hero-actions, .hero-social { justify-content: center; }
  .hero-media { order: -1; }
  .hero-photo-frame { width: 180px; height: 180px; }
}

@media (max-width: 760px) {
  .main-nav { display: none; }
  .nav-toggle { display: flex; }

  .header-inner.is-open .main-nav {
    display: block;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    padding: 12px 24px 20px;
  }
  .header-inner.is-open .main-nav ul {
    flex-direction: column;
    gap: 16px;
  }

  .section { padding: 64px 20px; }
}