/* ==========================================================================
   KAROL ZAGÓRSKI, MD — CLASSICAL ACADEMIC DESIGN SYSTEM
   Inspiration: Classic European/US Academic Homepages (Oxford, MIT, Princeton)
   ========================================================================== */

:root {
  --bg: #ffffff;
  --bg-subtle: #f9fafb;
  --text-main: #111827;
  --text-muted: #4b5563;
  --text-faint: #6b7280;
  
  --border-color: #e5e7eb;
  --border-dark: #d1d5db;
  
  --accent-link: #1d4ed8;
  --accent-link-hover: #0f2b82;

  --font-serif: 'Newsreader', Charter, 'Bitstream Charter', 'Sitka Text', Cambria, Georgia, serif;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, Menlo, Consolas, monospace;
}

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

html {
  font-size: 16px;
  background-color: var(--bg);
  color: var(--text-main);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
  line-height: 1.65;
}

body {
  min-height: 100vh;
  padding: 48px 20px 80px;
}

/* Page Container (Academic 720px golden reading width) */
.page-container {
  max-width: 720px;
  margin: 0 auto;
}

/* Top Nav / Language Switcher */
.top-nav-bar {
  display: flex;
  justify-content: flex-end;
  margin-bottom: 16px;
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  padding: 3px 8px;
  border-radius: 4px;
  background: var(--bg-subtle);
  border: 1px solid var(--border-color);
}

.lang-btn {
  text-decoration: none;
  color: var(--text-faint);
  font-weight: 500;
  transition: color 0.15s;
}

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

.lang-btn.active {
  color: var(--text-main);
  font-weight: 700;
  border-bottom: 1.5px solid var(--text-main);
}

.lang-sep {
  color: var(--border-dark);
  user-select: none;
}

/* Header & Profile */
.profile-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 32px;
  margin-bottom: 24px;
}

.profile-intro {
  flex: 1;
}

.profile-name {
  font-family: var(--font-serif);
  font-size: 2.25rem;
  font-weight: 600;
  line-height: 1.15;
  color: var(--text-main);
  letter-spacing: -0.01em;
  margin-bottom: 6px;
}

.profile-title {
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--text-main);
  margin-bottom: 8px;
}

.profile-affil {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.45;
  margin-bottom: 16px;
}

.profile-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 0.92rem;
}

.profile-links a {
  color: var(--accent-link);
  text-decoration: none;
  font-weight: 500;
}

.profile-links a:hover {
  text-decoration: underline;
  color: var(--accent-link-hover);
}

.sep {
  color: var(--border-dark);
  user-select: none;
}

/* Profile Photo */
.profile-photo-wrapper {
  flex-shrink: 0;
}

.profile-photo {
  width: 140px;
  height: 140px;
  object-fit: cover;
  object-position: top center;
  border-radius: 4px;
  border: 1px solid var(--border-color);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

/* Divider */
.divider {
  border: 0;
  height: 1px;
  background: var(--border-color);
  margin: 28px 0 32px;
}

/* Sections */
.section {
  margin-bottom: 40px;
}

.section-heading {
  font-family: var(--font-serif);
  font-size: 1.45rem;
  font-weight: 600;
  color: var(--text-main);
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 6px;
  margin-bottom: 16px;
  letter-spacing: -0.01em;
}

.text-p {
  font-size: 0.98rem;
  color: var(--text-muted);
  margin-bottom: 14px;
  line-height: 1.65;
}

.text-p strong {
  color: var(--text-main);
}

/* Featured / Upcoming Box */
.featured-box {
  background: var(--bg-subtle);
  border: 1px solid var(--border-color);
  border-left: 3px solid var(--text-main);
  padding: 18px 20px;
  border-radius: 2px;
}

.item-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

.item-badge {
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  background: #e0e7ff;
  color: #1e3a8a;
  padding: 2px 8px;
  border-radius: 2px;
}

.item-date {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-faint);
}

.item-title {
  font-family: var(--font-serif);
  font-size: 1.18rem;
  font-weight: 600;
  line-height: 1.35;
  color: var(--text-main);
  margin-bottom: 6px;
}

.item-authors {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.item-venue {
  font-size: 0.88rem;
  color: var(--text-faint);
  line-height: 1.45;
}

/* Lists */
.clean-list {
  list-style: square;
  padding-left: 20px;
}

.clean-list li {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 10px;
  line-height: 1.55;
}

.clean-list strong {
  color: var(--text-main);
}

.pub-numbered-list {
  padding-left: 20px;
}

.pub-item {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 14px;
  line-height: 1.55;
}

.pub-item strong {
  color: var(--text-main);
}

.pub-item em {
  color: var(--text-main);
}

/* Contact Details */
.contact-details {
  background: var(--bg-subtle);
  border: 1px solid var(--border-color);
  padding: 16px 20px;
  border-radius: 2px;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--text-muted);
}

.contact-details a {
  color: var(--accent-link);
  text-decoration: none;
}

.contact-details a:hover {
  text-decoration: underline;
}

/* Footer */
.page-footer {
  border-top: 1px solid var(--border-color);
  padding-top: 24px;
  margin-top: 50px;
  font-size: 0.85rem;
  color: var(--text-faint);
  text-align: center;
}

/* Quick Networking Card / Digital Business Card */
.networking-card {
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  padding: 18px 20px;
  margin: 20px 0 8px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.03);
}

.networking-badge-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
}

.live-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #10b981;
  box-shadow: 0 0 0 2px rgba(16, 185, 129, 0.2);
  display: inline-block;
  animation: pulse-dot 2s infinite ease-in-out;
}

@keyframes pulse-dot {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.25); opacity: 0.75; }
}

.networking-tag {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 500;
  color: #475569;
  letter-spacing: 0.02em;
}

.quick-actions-bar {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.btn-action {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: 6px;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  font-family: var(--font-sans);
  transition: all 0.15s ease-in-out;
  text-align: left;
  user-select: none;
  min-height: 52px;
}

.btn-action:active {
  transform: scale(0.98);
}

.btn-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.btn-labels {
  display: flex;
  flex-direction: column;
  line-height: 1.25;
}

.btn-label-primary {
  font-size: 0.88rem;
  font-weight: 600;
}

.btn-label-sub {
  font-size: 0.72rem;
  opacity: 0.8;
  margin-top: 2px;
}

/* Button Variants */
.btn-primary {
  background: #0f172a;
  color: #ffffff;
  border-color: #0f172a;
}
.btn-primary:hover {
  background: #1e293b;
  border-color: #1e293b;
  color: #ffffff;
  box-shadow: 0 2px 6px rgba(15, 23, 42, 0.15);
}

.btn-secondary {
  background: #ffffff;
  color: #1e293b;
  border-color: #cbd5e1;
}
.btn-secondary:hover {
  background: #f1f5f9;
  border-color: #94a3b8;
  color: #0f172a;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.btn-tertiary {
  background: #ffffff;
  color: #1e3a8a;
  border-color: #cbd5e1;
}
.btn-tertiary:hover {
  background: #eff6ff;
  border-color: #93c5fd;
  color: #1e3a8a;
  box-shadow: 0 2px 4px rgba(30, 58, 138, 0.08);
}

/* Toast Message */
.toast-message {
  margin-top: 10px;
  font-size: 0.82rem;
  color: #047857;
  font-weight: 500;
  display: none;
  padding: 8px 12px;
  background: #ecfdf5;
  border: 1px solid #a7f3d0;
  border-radius: 4px;
  animation: fadeIn 0.2s ease-in-out;
}
.toast-message.show {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Responsive */
@media (max-width: 640px) {
  body {
    padding: 24px 16px 60px;
  }

  .profile-header {
    flex-direction: column-reverse;
    align-items: flex-start;
    gap: 16px;
    margin-bottom: 16px;
  }

  .profile-photo {
    width: 120px;
    height: 120px;
  }

  .profile-name {
    font-size: 1.85rem;
    line-height: 1.15;
  }

  .profile-title {
    font-size: 0.98rem;
  }

  .profile-affil {
    font-size: 0.88rem;
  }

  .profile-links {
    font-size: 0.88rem;
    gap: 6px;
    word-break: break-word;
  }

  .quick-actions-bar {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .btn-action {
    min-height: 48px;
    padding: 12px 14px;
  }

  .btn-label-primary {
    font-size: 0.92rem;
  }

  .btn-label-sub {
    font-size: 0.75rem;
  }

  .item-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }
}