/* ==========================================================================
   Academic Personal Website
   Fonts: Playfair Display (headings) + Lora (body)
   Colors: Warm ivory (#FAFAF7), Slate (#3B4856), Muted navy (#2E3D50)
   Layout: Fixed left sidebar + scrollable main content
   ========================================================================== */

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 24px;
}

body {
  font-family: 'Lora', Georgia, serif;
  font-size: 16px;
  line-height: 1.75;
  color: #333;
  background-color: #FDFDFC;
}

a {
  color: #4A6274;
  text-decoration: none;
  transition: color 0.2s;
}

a:hover {
  color: #2E3D50;
  text-decoration: underline;
}

img {
  max-width: 100%;
  height: auto;
}

/* --- Page Layout: Sidebar + Main --- */
.page-wrapper {
  display: flex;
  min-height: 100vh;
}

/* --- Sidebar (Fixed Left) --- */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: 300px;
  height: 100vh;
  overflow-y: auto;
  background-color: #2E3D50;
  color: #E8E9EB;
  padding: 48px 28px 32px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.sidebar-photo {
  width: 150px;
  height: 150px;
  border-radius: 50%;
  object-fit: cover;
  object-position: center center;
  border: 3px solid rgba(255, 255, 255, 0.2);
  margin-bottom: 20px;
}

.sidebar-name-link {
  text-decoration: none;
}

.sidebar-name-link:hover {
  text-decoration: none;
}

.sidebar h1 {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: 1.5rem;
  font-weight: 700;
  color: #FFFFFF;
  line-height: 1.3;
  margin-bottom: 2px;
}

.sidebar .name-kanji {
  font-size: 1.15rem;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 12px;
}

.sidebar .affiliation-brief {
  font-size: 0.85rem;
  line-height: 1.5;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 20px;
}

/* Social icons in sidebar */
.social-links {
  display: flex;
  gap: 14px;
  margin-bottom: 28px;
}

.social-links a {
  color: rgba(255, 255, 255, 0.55);
  font-size: 1.5rem;
  transition: color 0.2s;
}

.social-links a:hover {
  color: #FFFFFF;
  text-decoration: none;
}

/* Sidebar interests */
.sidebar-interests {
  width: 100%;
  text-align: center;
  margin-bottom: 20px;
}

.sidebar-interests-label {
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}

.sidebar-interests-list {
  list-style: none;
  text-align: center;
  padding-left: 0;
}

.sidebar-interests-list li {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.95rem;
  line-height: 1.8;
}

/* Sidebar navigation */
.sidebar-nav {
  width: 100%;
  margin-top: auto;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding-top: 20px;
}

.sidebar-nav ul {
  list-style: none;
}

.sidebar-nav a {
  display: block;
  padding: 8px 12px;
  color: rgba(255, 255, 255, 0.65);
  font-size: 0.88rem;
  letter-spacing: 0.02em;
  border-radius: 4px;
  transition: background-color 0.2s, color 0.2s;
}

.sidebar-nav a:hover {
  background-color: rgba(255, 255, 255, 0.08);
  color: #FFFFFF;
  text-decoration: none;
}

/* Sidebar contact */
.sidebar-contact {
  width: 100%;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding-top: 16px;
  margin-top: 16px;
  text-align: center;
  font-size: 0.82rem;
  line-height: 1.5;
}

.sidebar-contact-label {
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 4px;
}

.sidebar-contact a {
  color: rgba(255, 255, 255, 0.7);
  word-break: break-all;
}

.sidebar-contact a:hover {
  color: #FFFFFF;
  text-decoration: underline;
}

.sidebar-copyright {
  font-size: 0.72rem;
  color: rgba(255, 255, 255, 0.35);
  margin-top: 12px;
}

/* --- Main Content (Scrollable) --- */
.main-content {
  margin-left: 300px;
  flex: 1;
  padding: 48px 56px 48px 56px;
  max-width: 1000px;
}

section {
  margin-bottom: 48px;
}

section + section {
  padding-top: 40px;
  border-top: 1px solid #E4E2DD;
}

/* --- Section Headings --- */
section h2 {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: 1.5rem;
  font-weight: 700;
  color: #2E3D50;
  margin-bottom: 20px;
  padding-bottom: 6px;
  border-bottom: 2px solid #2E3D50;
}

section h3 {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: 1.1rem;
  font-weight: 600;
  color: #3D3D3D;
  margin-top: 24px;
  margin-bottom: 12px;
}

/* --- Affiliations / Experience / Education --- */
.entry-list {
  list-style: none;
}

.entry-list li {
  margin-bottom: 16px;
  padding-left: 16px;
  border-left: 3px solid #D5D3CD;
}

.entry-list .entry-title {
  font-weight: 600;
}

.entry-list .entry-org {
  color: #4A6274;
  font-weight: 600;
}

.entry-list .entry-period {
  font-size: 0.88rem;
  color: #999;
}

/* Grouped entries (multiple roles at same company) */
.entry-group {
  margin-bottom: 16px;
  padding-left: 16px;
  border-left: 3px solid #D5D3CD;
}

.entry-group .entry-org {
  display: block;
  margin-bottom: 8px;
}

.entry-group .entry-role {
  margin-bottom: 8px;
  padding-left: 12px;
}

.entry-group .entry-role:last-child {
  margin-bottom: 0;
}

/* --- Education table --- */
.edu-table {
  width: 100%;
  border-collapse: collapse;
}

.edu-table tr + tr td {
  padding-top: 16px;
}

.edu-table td {
  vertical-align: top;
  line-height: 1.6;
}

.edu-table .edu-period {
  white-space: nowrap;
  width: 120px;
  padding-right: 20px;
  font-size: 0.9rem;
  color: #999;
}

/* --- Publications (numbered list) --- */
.pub-numbered {
  padding-left: 28px;
}

.pub-numbered li {
  margin-bottom: 16px;
  line-height: 1.65;
}

.pub-numbered li::marker {
  font-weight: 600;
  color: #999;
}

.pub-numbered a {
  font-weight: 600;
  color: #2563EB;
}

.pub-numbered a:hover {
  color: #1D4ED8;
}

/* --- Contact --- */
.contact-info {
  line-height: 2;
}

.contact-info dt {
  font-weight: 600;
  color: #4A6274;
  display: inline;
}

.contact-info dd {
  display: inline;
  margin-left: 4px;
}

.contact-info dd::after {
  content: '';
  display: block;
}

.contact-info a {
  color: #2563EB;
  font-weight: 600;
}

.contact-info a:hover {
  color: #1D4ED8;
}

/* --- Mobile hamburger button --- */
.menu-toggle {
  display: none;
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 200;
  background-color: #2E3D50;
  color: #FAFAF7;
  border: none;
  border-radius: 6px;
  width: 42px;
  height: 42px;
  font-size: 1.3rem;
  cursor: pointer;
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .menu-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .sidebar {
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    z-index: 150;
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .main-content {
    margin-left: 0;
    padding: 64px 20px 40px;
  }
}

@media (min-width: 769px) {
  .menu-toggle {
    display: none !important;
  }
}