/* ================================================
   CSS Variables — Light / Dark
   ================================================ */
:root {
  --bg:             #ffffff;
  --text-primary:   #111827;
  --text-secondary: #374151;
  --text-muted:     #9CA3AF;
  --text-subtle:    #6B7280;
  --border-subtle:  #F3F4F6;
  --border-strong:  #111827;
  --progress:       #111827;
  --transition:     200ms;
  --font:           'Geist', 'Inter', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
}

[data-theme="dark"] {
  --bg:             #0f172a;
  --text-primary:   #f9fafb;
  --text-secondary: #d1d5db;
  --text-muted:     #6b7280;
  --text-subtle:    #9ca3af;
  --border-subtle:  #1e293b;
  --border-strong:  #e5e7eb;
  --progress:       #818cf8;
}

/* ================================================
   Reset & Base
   ================================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text-primary);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background var(--transition), color var(--transition);
}

/* ================================================
   Progress Bar
   ================================================ */
#progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  width: 0%;
  background: var(--progress);
  z-index: 9999;
  transition: width 80ms linear, background var(--transition);
  pointer-events: none;
}

/* ================================================
   Header
   ================================================ */
header {
  position: sticky;
  top: 0;
  background: var(--bg);
  border-bottom: 1px solid var(--border-subtle);
  z-index: 100;
  transition: background var(--transition), border-color var(--transition);
}

.header-inner {
  max-width: 1024px;
  margin: 0 auto;
  padding: 28px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header-brand {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.brand-name {
  font-size: 1.125rem;
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  transition: color var(--transition);
  cursor: default;
}

.brand-tagline {
  font-size: 0.875rem;
  color: var(--text-muted);
  transition: color var(--transition);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 20px;
}

/* ================================================
   Dark Mode Toggle
   ================================================ */
#theme-toggle {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  padding: 2px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color var(--transition);
  line-height: 1;
}

#theme-toggle:hover {
  color: var(--text-primary);
}

/* ================================================
   Language Switcher
   ================================================ */
.lang-switcher {
  display: flex;
  align-items: center;
  gap: 8px;
}

.lang-btn {
  background: none;
  border: none;
  cursor: pointer;
  font-family: var(--font);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  transition: color var(--transition);
  padding: 0;
  line-height: 1;
}

.lang-btn:hover {
  color: var(--text-subtle);
}

.lang-btn.active {
  color: var(--text-primary);
  font-weight: 500;
}

/* ================================================
   Main Container
   ================================================ */
main {
  max-width: 672px;
  margin: 0 auto;
  padding: 64px 24px 80px;
}

/* ================================================
   Fade-in Animation
   ================================================ */
.fade-in {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

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

/* ================================================
   Profile Section
   ================================================ */
.profile-section {
  display: flex;
  align-items: flex-start;
  gap: 32px;
  margin-bottom: 48px;
}

.profile-photo {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
}

.profile-name {
  font-size: 1.5rem;
  font-weight: 500;
  color: var(--text-primary);
  line-height: 1.2;
  letter-spacing: -0.02em;
  transition: color var(--transition);
}

.profile-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 6px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  transition: color var(--transition);
  min-height: 1em;
}

.profile-links {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 12px;
}

.linkedin-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition);
}

.linkedin-link:hover {
  color: var(--text-primary);
}

.linkedin-link span {
  font-size: 0.75rem;
  letter-spacing: 0.02em;
}

/* ================================================
   PDF Button
   ================================================ */
.btn-pdf {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  font-family: var(--font);
  font-size: 0.75rem;
  letter-spacing: 0.02em;
  color: var(--text-muted);
  padding: 0;
  transition: color var(--transition);
}

.btn-pdf:hover {
  color: var(--text-primary);
}

/* ================================================
   Skill Chips
   ================================================ */
.skill-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 32px;
}

.chip {
  font-size: 0.75rem;
  color: var(--text-subtle);
  border: 1px solid var(--border-subtle);
  padding: 4px 10px;
  letter-spacing: 0.02em;
  transition: color var(--transition), border-color var(--transition);
}

/* ================================================
   Currently Building
   ================================================ */
.currently-building {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 16px;
  padding: 12px 16px;
  border: 1px solid var(--border-subtle);
  flex-wrap: wrap;
  transition: border-color var(--transition);
}

.cb-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #22c55e;
  flex-shrink: 0;
  animation: pulse-dot 2.5s ease infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.cb-label {
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  flex-shrink: 0;
  transition: color var(--transition);
}

.cb-items {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  transition: color var(--transition);
}

/* ================================================
   Section Nav
   ================================================ */
#section-nav {
  position: fixed;
  top: 50%;
  transform: translateY(-50%);
  right: 20px;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 18px;
  z-index: 50;
}

@media (max-width: 900px) {
  #section-nav {
    display: none;
  }
}

.snav-item {
  display: flex;
  align-items: center;
  flex-direction: row-reverse;
  gap: 10px;
  text-decoration: none;
  cursor: pointer;
}

.snav-dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--text-muted);
  flex-shrink: 0;
  transition: background var(--transition), width var(--transition), height var(--transition);
}

.snav-label {
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  opacity: 0;
  transform: translateX(6px);
  transition: opacity 0.2s ease, transform 0.2s ease, color var(--transition);
  white-space: nowrap;
  pointer-events: none;
}

.snav-item:hover .snav-label,
.snav-item.snav-active .snav-label {
  opacity: 1;
  transform: translateX(0);
}

.snav-item.snav-active .snav-dot {
  background: var(--text-primary);
  width: 7px;
  height: 7px;
}

.snav-item:hover .snav-dot {
  background: var(--text-subtle);
}

/* ================================================
   Typewriter Cursor
   ================================================ */
.typewriter-cursor {
  display: inline-block;
  width: 1px;
  height: 0.8em;
  background: var(--text-muted);
  margin-left: 1px;
  vertical-align: text-bottom;
  animation: blink 1s step-end infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

/* ================================================
   Bio / Prose
   ================================================ */
.prose {
  display: flex;
  flex-direction: column;
  gap: 20px;
  text-align: justify;
  hyphens: auto;
}

.prose p {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.7;
  transition: color var(--transition);
}

/* ================================================
   Callout Box
   ================================================ */
.callout {
  border: 1px solid var(--border-strong);
  padding: 28px;
  margin-top: 40px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: border-color var(--transition);
}

.callout p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.7;
  transition: color var(--transition);
}

.link-underline {
  text-decoration: underline;
  text-underline-offset: 2px;
  color: inherit;
  transition: color var(--transition);
}

.link-underline:hover {
  color: var(--text-primary);
}

/* ================================================
   Content Sections
   ================================================ */
.content-section {
  margin-top: 48px;
  padding-top: 40px;
  border-top: 1px solid var(--border-subtle);
  transition: border-color var(--transition);
}

.section-heading {
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 20px;
  transition: color var(--transition);
}

/* ================================================
   Timeline
   ================================================ */
.timeline {
  display: flex;
  flex-direction: column;
  gap: 36px;
}

.timeline-group {
  display: flex;
  flex-direction: column;
}

.timeline-company {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.timeline-company strong {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-primary);
  transition: color var(--transition);
}

.timeline-item {
  display: flex;
  position: relative;
  padding-left: 24px;
  padding-bottom: 18px;
  border-left: 1px solid var(--border-subtle);
  margin-left: 3px;
  transition: border-color var(--transition);
}

.timeline-item-last {
  border-left-color: transparent;
  padding-bottom: 0;
}

.timeline-dot {
  position: absolute;
  left: -4px;
  top: 5px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--text-muted);
  flex-shrink: 0;
  transition: background var(--transition);
}

.timeline-content {
  flex: 1;
}

.job-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 6px;
}

.job-title {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-primary);
  transition: color var(--transition);
}

.job-date {
  font-size: 0.75rem;
  color: var(--text-muted);
  white-space: nowrap;
  flex-shrink: 0;
  transition: color var(--transition);
}

.job-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.65;
  transition: color var(--transition);
}

.meta {
  font-size: 0.75rem;
  color: var(--text-muted);
  transition: color var(--transition);
}

/* ================================================
   Education
   ================================================ */
.edu-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.edu-name {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 3px;
  transition: color var(--transition);
}

.edu-degree {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 3px;
  transition: color var(--transition);
}

/* ================================================
   Simple List
   ================================================ */
.simple-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.simple-list li {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.5;
  transition: color var(--transition);
}

/* ================================================
   Certifications List
   ================================================ */
.cert-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.cert-list li {
  padding: 12px 0;
  border-bottom: 1px solid var(--border-subtle);
  transition: border-color var(--transition);
}

.cert-list li:last-child {
  border-bottom: none;
}

.cert-name {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.4;
  transition: color var(--transition);
}

.cert-pl {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 1px;
  font-style: italic;
  transition: color var(--transition);
}

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

.cert-highlight .cert-name {
  font-weight: 500;
  color: var(--text-primary);
}

.cert-strengths {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  margin-top: 3px;
  letter-spacing: 0.01em;
  transition: color var(--transition);
}

.cert-link {
  color: inherit;
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--transition);
}

.cert-link:hover {
  color: var(--text-primary);
}

/* ================================================
   Language List
   ================================================ */
.lang-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.lang-list li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  font-size: 0.875rem;
  color: var(--text-secondary);
  transition: color var(--transition);
}

/* ================================================
   Certification highlight
   ================================================ */
.cert-highlight {
  font-weight: 500;
  color: var(--text-primary) !important;
}

/* ================================================
   Back to Top
   ================================================ */
#back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--text-primary);
  color: var(--bg);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.25s ease, transform 0.25s ease, background var(--transition);
  pointer-events: none;
  z-index: 200;
}

#back-to-top.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

#back-to-top:hover {
  opacity: 0.8;
}

@media (max-width: 640px) {
  #back-to-top {
    bottom: 20px;
    right: 20px;
    width: 36px;
    height: 36px;
  }
}

/* ================================================
   Footer
   ================================================ */
footer {
  border-top: 1px solid var(--border-subtle);
  margin-top: 64px;
  transition: border-color var(--transition);
}

.footer-inner {
  max-width: 1024px;
  margin: 0 auto;
  padding: 32px 24px;
}

/* ================================================
   Closing Section
   ================================================ */
.closing-section {
  margin-top: 48px;
  padding-top: 40px;
  border-top: 1px solid var(--border-subtle);
  text-align: center;
  transition: border-color var(--transition);
}

.closing-location {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 14px;
  transition: color var(--transition);
}

.closing-text {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 400px;
  margin: 0 auto 20px;
  transition: color var(--transition);
}

.closing-link {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 0.875rem;
  color: var(--text-primary);
  text-decoration: none;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 1px;
  transition: border-color var(--transition), color var(--transition);
}

.closing-link:hover {
  border-bottom-color: var(--text-primary);
}

/* ================================================
   Print / Save as PDF
   ================================================ */
@media print {
  #progress-bar,
  #theme-toggle,
  .lang-switcher,
  #back-to-top,
  #section-nav,
  .btn-pdf,
  .currently-building,
  .skill-chips {
    display: none !important;
  }

  html, body {
    background: #fff !important;
    color: #000 !important;
  }

  body {
    font-size: 10.5pt;
    -webkit-print-color-adjust: exact;
  }

  header {
    position: static;
    border-bottom: 1px solid #e5e5e5;
  }

  main {
    padding: 24px 0 0;
    max-width: 100%;
  }

  .fade-in {
    opacity: 1 !important;
    transform: none !important;
  }

  .profile-section {
    margin-bottom: 28px;
  }

  .profile-name {
    font-size: 18pt;
    color: #000;
  }

  .profile-label {
    color: #555;
  }

  .linkedin-link {
    color: #555;
  }

  .prose p,
  .job-desc,
  .cert-name,
  .edu-name,
  .edu-degree,
  .simple-list li {
    color: #222;
  }

  .callout {
    border: 1px solid #333;
    page-break-inside: avoid;
  }

  .callout p,
  .meta,
  .cert-meta,
  .cert-pl,
  .job-date,
  .section-heading {
    color: #555;
  }

  .timeline-item {
    border-left-color: #ddd;
    page-break-inside: avoid;
  }

  .timeline-dot {
    background: #555;
  }

  .content-section {
    border-top-color: #e5e5e5;
    page-break-inside: avoid;
  }

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

  .cert-highlight .cert-name {
    color: #000;
  }

  .footer-inner p {
    color: #999;
  }
}

/* ================================================
   Responsive
   ================================================ */
@media (max-width: 640px) {
  .header-inner {
    padding: 20px 16px;
  }

  main {
    padding: 40px 16px 60px;
  }

  .profile-section {
    gap: 20px;
  }

  .profile-photo {
    width: 64px;
    height: 64px;
  }

  .job-header {
    flex-direction: column;
    gap: 2px;
  }

  .job-date {
    white-space: normal;
  }

  .callout {
    padding: 20px;
  }
}

@media (max-width: 400px) {
  .header-actions {
    gap: 12px;
  }

  .lang-switcher {
    gap: 6px;
  }
}