/* Safe area for notched devices (iPhone X+, etc.) */
@supports (padding: env(safe-area-inset-top)) {
  .navbar { padding-left: max(1rem, env(safe-area-inset-left)); padding-right: max(1rem, env(safe-area-inset-right)); }
  .back-to-top { right: max(1rem, env(safe-area-inset-right)); bottom: max(1.5rem, env(safe-area-inset-bottom)); }
}

/* Tablet & Mobile: Sidebar becomes top hero - tek sütun, bölünme yok */
@media (max-width: 1024px) {
  .app-wrap { flex-direction: column; width: 100%; max-width: 100vw; overflow-x: hidden; }
  .main-content { width: 100%; max-width: 100%; overflow-x: hidden; }
  .research-grid { grid-template-columns: 1fr; }
  .timeline-item { grid-template-columns: 1fr; }
  .section, .hero-section { width: 100%; }
  .sidebar {
    position: relative;
    width: 100%;
    max-width: 100%;
    height: auto;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 1.5rem;
    border-right: none;
    border-bottom: 1px solid var(--border);
    box-sizing: border-box;
  }
  .sidebar-photo {
    width: 140px;
    height: 140px;
    margin: 0 auto 1rem;
    flex-shrink: 0;
  }
  .sidebar-header {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    align-items: center;
    text-align: center;
    width: 100%;
  }
  .sidebar-name { text-align: center; padding: 0; font-size: var(--text-xl); }
  .sidebar-title, .sidebar-domains { text-align: center; padding: 0; margin: 0.25rem 0 0; }
  .sidebar-metrics {
    margin: 1rem auto;
    width: 100%;
    max-width: 280px;
  }
  .sidebar-buttons {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    padding: 0 0 1rem;
    gap: 0.5rem;
    width: 100%;
  }
  .sidebar-buttons .btn { width: auto; min-width: 44px; min-height: 44px; }
  .sidebar-institution, .sidebar-nav { display: none; }
  .main-content { margin-left: 0 !important; max-width: 100%; }
  .scroll-progress { left: 0 !important; right: 0 !important; }
  .section { padding: 3rem clamp(1rem, 4vw, 1.5rem); max-width: 100%; box-sizing: border-box; }
  .hero-section { padding: 3rem clamp(1rem, 4vw, 1.5rem) 4rem; max-width: 100%; box-sizing: border-box; }
  .footer-inner { padding: 0 1rem; }
  .impact-card { overflow-x: auto; -webkit-overflow-scrolling: touch; }
  .impact-table { min-width: 260px; }
}

@media (max-width: 768px) {
  .sidebar {
    padding: 1.25rem;
  }
  .sidebar-photo {
    width: 120px;
    height: 120px;
    margin: 0 auto 1rem;
  }
  .sidebar-name { font-size: var(--text-lg); }
  .sidebar-metrics { max-width: 100%; }
  .sidebar-buttons .btn { font-size: 0.85rem; }
  .navbar {
    padding: 0.75rem 1rem;
    flex-wrap: wrap;
    gap: 0.5rem;
  }
  .navbar-actions {
    gap: 0.5rem;
    flex-shrink: 1;
  }
  .navbar-actions .btn-sm {
    padding: 0.4rem 0.6rem;
    font-size: 0.75rem;
  }
  .navbar-links {
    display: none;
    width: 100%;
    flex-direction: column;
    padding: 1rem 0;
    gap: 0.5rem;
  }
  .navbar-links.open { display: flex; }
  .navbar-links a { padding: 0.75rem; min-height: 44px; display: flex; align-items: center; }
  .navbar-actions { flex-wrap: wrap; }
  .section { padding: 2.5rem 1rem; width: 100%; }
  .hero-section { padding: 2rem 1rem 3rem; width: 100%; }
  .pub-card, .research-card, .impact-card { width: 100%; max-width: 100%; }
  .hero-title { font-size: clamp(1.75rem, 5vw, 2.25rem); }
  .hero-metrics-row { flex-direction: column; gap: 0.75rem; }
  .hero-cta { flex-direction: column; }
  .hero-cta .btn { width: 100%; justify-content: center; min-height: 44px; }
  .research-grid { grid-template-columns: 1fr; }
  .timeline-item { grid-template-columns: 1fr; gap: 0.75rem; }
  .timeline-year { margin-bottom: 0.5rem; }
  .footer { padding: 2rem 1rem; }
  .footer-inner { flex-direction: column; text-align: center; gap: 1.5rem; }
  .footer-links { align-items: center; }
  .back-to-top { bottom: 1.5rem; right: 1rem; width: 44px; height: 44px; }
  .hero-desc { max-width: 100%; }
  .research-card { min-width: 0; }
}

/* Very small phones */
@media (max-width: 480px) {
  html { font-size: 16px; }
  body { font-size: 1rem; }
  .sidebar { padding: 1rem; }
  .sidebar-buttons .btn { font-size: 0.8rem; padding: 0.5rem 0.75rem; }
  .navbar { padding: 0.5rem 0.75rem; }
  .navbar-actions > a { font-size: 1rem; }
  .section { padding: 2rem 0.75rem; }
  .hero-section { padding: 1.5rem 0.75rem 2.5rem; }
  .hero-title { font-size: 1.5rem; }
  .section-title { font-size: 1.25rem; }
  .hero-metrics-row { font-size: 0.9rem; }
}

/* Fix iOS Safari 100vh issue */
@supports (-webkit-touch-callout: none) {
  body { min-height: -webkit-fill-available; }
  .sidebar { min-height: auto; }
}

/* Touch-friendly: minimum 44px tap targets */
@media (hover: none) and (pointer: coarse) {
  .btn, .navbar-links a, .sidebar-nav a, .lang-toggle, .theme-toggle {
    min-height: 44px;
    min-width: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  background: var(--panel-strong);
  border: 1px solid var(--border-soft);
  border-radius: 10px;
  cursor: pointer;
  flex-shrink: 0;
}
.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text-main);
}
@media (max-width: 768px) {
  .nav-toggle { display: flex; }
}
@media (max-width: 768px) {
  .nav { padding: 1rem; flex-direction: column; align-items: stretch; }
  .nav-links { display: none; flex-direction: column; }
  .nav-links.open { display: flex; }
  .main-wrap main { padding: 2rem 1rem; }
  .search-box { max-width: 100%; }
  .pub-card { padding: 1rem; }
  .impact-card { padding: 1rem; }
}