:root {
  --color-accent: #2ec4b6;
  --color-accent-hover: #25a89c;
  --color-accent-light: #e0f7f5;
  --color-dark: #1a1f26;
  --color-text: #2d3748;
  --color-text-light: #64748b;
  --color-muted: #94a3b8;
  --color-border: #e2e8f0;
  --color-bg: #f8fafc;
  --color-bg-white: #ffffff;
  --color-sidebar: #1e2530;
  --color-sidebar-text: #e2e8f0;
  --color-sidebar-muted: #94a3b8;
  --font-display: "Manrope", system-ui, sans-serif;
  --font-body: "Inter", system-ui, sans-serif;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
}

.font-display {
  font-family: var(--font-display);
}

/* Hide language content */
[data-lang="en"] {
  display: none;
}
.lang-en [data-lang="en"] {
  display: block;
}
.lang-en [data-lang="uk"] {
  display: none;
}
.lang-en span[data-lang="en"],
span[data-lang="uk"] {
  display: inline;
}
.lang-en span[data-lang="uk"] {
  display: none;
}
span[data-lang="en"] {
  display: none;
}
.lang-en span[data-lang="en"] {
  display: inline;
}

/* Page wrapper */
.page-wrapper {
  max-width: 1080px;
  margin: 0 auto;
  display: flex;
  min-height: 100vh;
  box-shadow: 0 0 60px rgba(0, 0, 0, 0.1);
}

/* Sidebar */
.sidebar {
  position: sticky;
  top: 0;
  width: 320px;
  min-width: 320px;
  height: 100vh;
  background: var(--color-sidebar);
  color: var(--color-sidebar-text);
  padding: 0;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}
.sidebar-content {
  padding: 0.25rem 1.25rem 1rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.sidebar::-webkit-scrollbar {
  width: 4px;
}
.sidebar::-webkit-scrollbar-track {
  background: transparent;
}
.sidebar::-webkit-scrollbar-thumb {
  background: var(--color-text-light);
}

/* Main content */
.main-content {
  flex: 1;
  min-height: 100vh;
}

/* Navigation buttons */
.nav-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  width: 100%;
  padding: 0.4rem 0.75rem;
  border: none;
  background: transparent;
  color: var(--color-sidebar-muted);
  font-family: var(--font-body);
  font-size: 0.8125rem;
  font-weight: 500;
  text-align: left;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.2s ease;
}
.nav-btn:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--color-sidebar-text);
}
.nav-btn.active {
  background: var(--color-accent);
  color: white;
}
.nav-btn svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

/* Language toggle */
.lang-toggle {
  display: flex;
  background: rgba(255, 255, 255, 0.08);
}
.lang-toggle button {
  padding: 0.4rem 0.875rem;
  border: none;
  background: transparent;
  cursor: pointer;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-sidebar-muted);
  transition: all 0.2s ease;
}
.lang-toggle button.active {
  background: var(--color-accent);
  color: white;
}

/* Photo header */
.photo-header {
  background: var(--color-accent);
  padding: 0;
  width: 100%;
}
.photo-frame {
  width: 100%;
  height: 280px;
  overflow: hidden;
}
.photo-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
}
/* Name styling */
.name-block {
  display: flex;
  justify-content: center;
  padding: 0 1.25rem 0.75rem;
  transform: translateY(-1.5rem);
  margin-bottom: -1rem;
}
.name-block h1 {
  font-family: var(--font-display);
  font-size: 2.2rem;
  font-weight: 700;
  line-height: 0.95;
  color: white;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  text-align: left;
}
.name-block p {
  margin-top: 0.5rem;
}

/* Skills badges */
.skill-badge {
  display: inline-block;
  padding: 0.4rem 0.9rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  font-size: 0.875rem;
  color: var(--color-text);
  margin: 0.2rem;
  transition: all 0.2s ease;
}
.skill-badge:hover {
  background: var(--color-accent-light);
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* Section styling */
.section {
  padding: 3rem 2.5rem;
  border-bottom: 1px solid var(--color-border);
}
.section:last-child {
  border-bottom: none;
}
.section-header {
  margin-bottom: 2rem;
}
.section-title {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-dark);
  text-transform: uppercase;
  letter-spacing: 0.02em;
  margin-bottom: 0.5rem;
}
.section-line {
  width: 50px;
  height: 3px;
  background: var(--color-accent);
}

/* Cards */
.card {
  background: var(--color-bg-white);
  padding: 1.5rem;
  border: 1px solid var(--color-border);
  transition: all 0.2s ease;
}
.card:hover {
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
  border-color: var(--color-accent);
}

/* Timeline */
.timeline-item {
  position: relative;
  padding-left: 1.75rem;
  padding-bottom: 1.5rem;
  border-left: 2px solid var(--color-border);
}
.timeline-item:last-child {
  border-left-color: transparent;
  padding-bottom: 0;
}
.timeline-item::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 6px;
  width: 8px;
  height: 8px;
  background: var(--color-accent);
}

/* Contact link */
.contact-link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-sidebar-muted);
  font-size: 0.8125rem;
  text-decoration: none;
  transition: color 0.2s ease;
}
.contact-link:hover {
  color: var(--color-accent);
}
.contact-link svg {
  width: 14px;
  height: 14px;
}

/* Social icons */
.social-btn {
  width: 36px;
  height: 36px;
  background: rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-sidebar-muted);
  transition: all 0.2s ease;
}
.social-btn:hover {
  background: var(--color-accent);
  color: white;
}

/* Download button */
.download-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  padding: 0.4rem 0.65rem;
  background: var(--color-accent);
  color: white;
  border: none;
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
}
.download-btn:hover {
  background: var(--color-accent-hover);
}
.download-btn.outline {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.25);
  color: var(--color-sidebar-text);
}
.download-btn.outline:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--color-accent);
}
.download-btn svg {
  width: 12px;
  height: 12px;
}

/* Skill category icon */
.skill-icon {
  width: 40px;
  height: 40px;
  background: var(--color-accent-light);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
}

/* Level badge */
.level-badge {
  font-size: 0.6875rem;
  font-weight: 700;
  padding: 0.25rem 0.625rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.level-native {
  background: var(--color-accent);
  color: white;
}
.level-fluent {
  background: #64748b;
  color: white;
}
.level-intermediate {
  background: var(--color-accent-light);
  color: var(--color-accent);
}

/* Date badge */
.date-badge {
  display: inline-block;
  font-size: 0.6875rem;
  font-weight: 700;
  padding: 0.25rem 0.5rem;
  background: var(--color-accent-light);
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

/* Mobile header */
.mobile-header {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: var(--color-sidebar);
  color: white;
  padding: 1rem 1.5rem;
  z-index: 90;
  align-items: center;
  justify-content: space-between;
}

/* Mobile sidebar toggle */
.mobile-toggle {
  display: none;
  width: 40px;
  height: 40px;
  background: transparent;
  color: white;
  border: none;
  cursor: pointer;
  align-items: center;
  justify-content: center;
}
.mobile-toggle svg {
  width: 24px;
  height: 24px;
}

/* Mobile overlay */
.overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 95;
}
.overlay.active {
  display: block;
}

/* Responsive */
@media (max-width: 1024px) {
  .page-wrapper {
    max-width: 100%;
    box-shadow: none;
  }
  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    z-index: 100;
  }
  .sidebar.open {
    transform: translateX(0);
  }
  .main-content {
    padding-top: 64px;
  }
  .mobile-header {
    display: flex;
  }
  .mobile-toggle {
    display: flex;
  }
  .section {
    padding: 2.5rem 1.5rem;
  }
}

/* Project link buttons */
.project-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  font-size: 0.8125rem;
  font-weight: 600;
  transition: all 0.2s ease;
  text-decoration: none;
}
.project-link.primary {
  background: var(--color-accent);
  color: white;
}
.project-link.primary:hover {
  background: var(--color-accent-hover);
}
.project-link.secondary {
  border: 1px solid var(--color-border);
  color: var(--color-text-light);
}
.project-link.secondary:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}