/* Import Font */
@import url('https://fonts.googleapis.com/css2?family=Open+Sans&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC&display=swap');

/* ========================= */
/* CSS Variables */
/* ========================= */
:root {
  --font-family: "Open Sans", "Noto Sans JP", "Noto Sans SC", sans-serif;
  --main-bg: #191919;
  --alt-bg: #333;
  --text-light: #fff;
  --text-dark: #333;
  --shadow: rgba(0, 0, 0, 0.2) 0px 7px 29px 0px;
  --highlight: rgba(0, 0, 0, 0.7);
  --padding: 20px;
  --gap: 10px;
  --radius: 10px;
  --link-hover: #555;
}

/* ========================= */
/* Base Layout */
/* ========================= */
html, body {
  height: 100%;
  margin: 0;
  overflow-x: hidden;
}

.page-wrapper {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

main {
  flex: 1;
}

body {
  font-family: var(--font-family);
}

a {
  color: inherit;
  text-decoration: inherit;
}

/* ========================= */
/* Header & Navigation */
/* ========================= */
header {
  background-color: var(--main-bg);
  padding: var(--padding);
  color: var(--text-light);
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: relative;
  text-align: left;
}

.header-meta {
  display: flex;
  flex-direction: column;
  gap: 4px;
  line-height: 1.3;
}

.header-meta .institute {
  font-size: 1em;
  font-weight: 400;
  color: rgba(255, 255, 255, 0.7);
  letter-spacing: 0.3px;
  margin-bottom: 0;
}

.header-meta h1 {
  font-size: 1.9em;
  font-weight: bold;
  margin: 0;
}

.institute a {
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  font-weight: 400;
}

.institute a:hover {
  text-decoration: none;
  border-bottom: 1px dotted rgba(255, 255, 255, 0.7);
}

.menu-icon {
  display: none;
  cursor: pointer;
  z-index: 1001;
}

.menu-icon svg {
  display: block;
}

.menu-icon svg rect {
  transition: all 0.3s ease;
  transform-origin: center;
}

#menu-toggle:checked + .menu-icon .bar1 {
  transform: rotate(45deg);
  y: 33;
}

#menu-toggle:checked + .menu-icon .bar2 {
  opacity: 0;
}

#menu-toggle:checked + .menu-icon .bar3 {
  transform: rotate(-45deg);
  y: 33;
}

#main-nav ul {
  display: flex;
  justify-content: center;
  gap: 10px;
}

nav ul {
  list-style-type: none;
  margin: 0;
  padding: 0;
  text-align: center;
}

nav ul li {
  display: inline;
  margin: 0 var(--gap);
}

nav ul li a {
  text-decoration: none;
  color: var(--text-light);
}

@media (max-width: 768px) {
  .header-meta h1 {
    font-size: 1.3em;
    margin: 0;
  }
  
  .header-meta .institute {
    font-size: 0.9em;
  }
  
  .menu-icon {
    display: block;
    margin-left: auto;
    
  }

  #main-nav ul {
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    background-color: rgba(0, 0, 0, 0.8);
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    padding-top: 100px;
    z-index: 1000;
  }

  #menu-toggle:checked + .menu-icon + #main-nav ul {
    display: flex;
  }

  #main-nav ul li {
    display: block;
    margin: 15px 0;
    font-size: 20px;
  }
  
}

#navigation li {
  display: inline-block;
  margin-left: 20px;
}

.lang-button {
  font-size: 0.9em;
  padding: 4px 8px;
  background: none;
  border: 1px solid rgba(255, 255, 255, 0.5);
  color: white;
  border-radius: 4px;
  cursor: pointer;
  transition: background 0.2s ease;
}

.lang-button:hover {
  background: rgba(255, 255, 255, 0.2);
}

body#home a#homenav,
body#members a#membersnav,
body#research a#resnav,
body#publications a#pubnav,
body#positions a#posnav,
body#access a#accessnav {
  font-weight: bold;
  text-decoration: underline;
}

/* ========================= */
/* Main & Footer */
/* ========================= */
main {
  flex: 1;
  text-align: justify;
  max-width: 1000px;
  margin: 0 auto;
  padding: var(--padding);
  box-sizing: border-box;
  width: 100%; /* Ensures it shrinks on small screens */
}

main * {
  max-width: 100%;
  box-sizing: border-box;
}

body#home main {
  text-align: center;
  max-width: none;
  margin: 0;
  padding: 0;
}

footer {
  background-color: var(--main-bg);
  color: var(--text-light);
  padding: 10px;
  text-align: center;
  width: 100%;
  max-width: 100%;
  overflow-x: hidden;
}

/* ========================= */
/* Homepage Banner */
/* ========================= */
.main_banner {
  aspect-ratio: 16 / 6.8;
  width: 100%;
  background-image: url("images/front_banner.png");
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  display: flex;
  align-items: flex-end;
}

.overview {
  width: 100%;
  padding: 20px 10px;
  background-color: rgba(0, 0, 0, 0.0);
  font-size: 35px;
  color: var(--text-light);
}

.overview a.learn-more {
  display: inline-block;
  font-size: 18px;
  font-weight: 600;
  padding: 10px 20px;
  border-radius: 5px;
  background-color: rgba(255, 255, 255, 0.1);
  border: 1px solid white;
  transition: all 0.3s ease;
}

.overview a.learn-more .arrow {
  font-size: 24px;
  margin-left: 8px;
  vertical-align: middle;
}

.overview a.learn-more:hover {
  background-color: rgba(255, 255, 255, 0.2);
  text-decoration: none;
}

@media (max-width: 768px) {  
  .overview {
    font-size: 20px;
  }
  .main_banner {
    aspect-ratio: 16 / 9;
  }
}

/* ========================= */
/* News Section */
/* ========================= */
.news-section {
  margin: 20px 0;
  padding: 0 5%;
  text-align: center;
}

.news-container {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--gap);
}

.news-card {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  background-color: #fff;
  box-shadow: var(--shadow);
  width: 300px;
  margin: var(--gap);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.news-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.25);
}

/* --- Image --- */
.news-cover {
  height: 200px;
  overflow: hidden;
}

.news-cover img {
  object-fit: cover;
  object-position: center;
  width: 100%;
  height: 100%;
  transition: transform 0.3s ease;
}

.news-card:hover .news-cover img {
  transform: scale(1.05);
}

/* --- Overlay --- */
.news-info {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 50%;
  background-color: rgba(0, 0, 0, 0.8);
  color: var(--text-light);
  padding: 12px 16px;
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  opacity: 0.95;
  transition: opacity 0.3s ease;
}

.news-card:hover .news-info {
  opacity: 1;
}

/* --- Date --- */
.news-date {
  position: absolute;
  top: 10px;
  left: 16px;
  font-size: 13px;
  color: #ccc;
}

/* --- Title --- */
.news-info h4 {
  font-weight: normal;
  margin: 0;
  font-size: 15px;
  text-align: left;
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.news-info h4 a {
  color: inherit;
  text-decoration: none;
  transition: color 0.3s ease;
}

.news-info:hover {
  text-decoration: underline;
}

.more-news {
  display: inline-block;
  font-size: 18px;
  font-weight: 600;
  padding: 10px 20px;
  margin-top: 20px;
  background-color: rgba(255, 255, 255, 0.1);
  border: 1px solid var(--alt-bg);
  color: var(--text-dark);
  text-decoration: none;
  border-radius: 5px;
  transition: background-color 0.3s ease;
}

.more-news:hover {
  background-color: rgba(255, 255, 255, 0.2);
}

.credit-note {
  font-size: 0.9em;
  font-style: italic;
  color: #999;
  text-align: left;
  margin: 40px 20px;
}

/* ========================= */
/* Important Links */
/* ========================= */
.important-links {
  margin: 10px 0 20px;
  padding: 0 5%;
  text-align: center;
}

.links-flex {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--gap);
}

.links-flex div {
  flex-shrink: 1;
}

.links-flex div img {
  width: auto;
  max-height: 70px;
}

/* ========================= */
/* Members Section */
/* ========================= */
.member-category {
  margin: 0 20px 2%;
  text-align: left;
}

.member-category h2 {
  text-align: center;
}

.member-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
}

.profile-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: center;

  border: 1px solid #ccc;
  padding: var(--padding);
  border-radius: var(--radius);
  text-align: center;

  flex: 0 0 250px;
  margin: var(--gap);
  box-sizing: border-box;
}

.profile-card img {
  width: 150px;
  height: 150px;
  border-radius: 50%;
  object-fit: cover;
  margin-bottom: var(--gap);
}

.job-title,
.course {
  font-weight: bold;
  margin-bottom: 5px;
}

.room-number {
  font-size: 0.9em;
  color: #666;
  margin-bottom: 10px;
}

.contact-icons a {
  display: inline-block;
  margin: 0 5px;
  color: var(--text-dark);
  font-size: 20px;
}

.member-profile {
  display: flex;
  align-items: flex-start;
  margin: 50px auto 100px;
  max-width: 800px;
  text-align: left;
  gap: 50px;
}

.member-profile img {
  max-width: 300px;
  height: auto;
}

@media (max-width: 900px) {
  .member-grid {
    display: block;
  }

  .profile-card {
    display: block;
    width: 100%;
    max-width: none;
    border: none;
    border-bottom: 1px solid #ccc;
    border-radius: 0;
    padding: 10px 0;
    margin: 0;
    text-align: left;
  }

  .profile-card img {
    display: none;
  }

  .profile-card h3 {
    font-size: 20px;
  }
  
  .profile-card .job-title,
  .profile-card .room-number,
  .profile-card .contact-icons,
  .profile-card .course {
    margin: 2px 0;
    font-size: 14px;
    padding-left: 10px;
  }

  .contact-icons {
    margin-top: 5px;
  }
}

/* ========================= */
/* Research Section */
/* ========================= */
.research-overview {
  margin-bottom: 10px;
  color: var(--text-dark);
  line-height: 1.6;
}
    
.research-overview p {
  margin-bottom: 1em;
}

.slider-container {
  position: relative;
  overflow: hidden;
}

.slider-track {
  display: flex;
  width: 100%;
  box-sizing: border-box;
  transition: transform 0.5s ease;
}

.slide {
  flex: 0 0 100%;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  justify-content: flex-start;
  padding: 20px;
  box-sizing: border-box;
  overflow: hidden;
}
    
.slide h3 {
  margin-bottom: 15px;
  text-align: center;
}

.slide-description {
  width: 100%;
  text-align: justify;
}

.slider-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  font-size: 36px;
  font-weight: bold;
  color: white;
  background-color: rgba(0, 0, 0, 0.1);
  border: none;
  border-radius: 50%;
  width: 40px;
  height: 40px;
  cursor: pointer;
  z-index: 10;
  transition: background-color 0.3s ease, transform 0.3s ease;
}

.slider-btn:hover {
  background-color: rgba(0, 0, 0, 0.7);
  transform: translateY(-50%) scale(1.1);
}

.left-btn {
  left: 10px;
}

.right-btn {
  right: 10px;
}

@media (max-width: 600px) {
  .slider-btn {
    top: 50%;
    transform: translateY(-50%);
    font-size: 32px;
    width: 40px;
    height: 40px;
  }

  .left-btn {
    left: 0px;
  }

  .right-btn {
    right: 0px;
  }
  
  .slider-btn:hover {
    background-color: rgba(0, 0, 0, 0.1);
    transform: translateY(-50%) scale(1.1);
  }
}


/* ========================= */
/* Publications Section */
/* ========================= */
.pubs-auto {
  font-size: 16px;
}

.pubs-auto h2 {
  font-size: 20px;
  margin-top: 30px;
  margin-bottom: 10px;
}

.pub-entry {
  margin-left: 20px;
  margin-bottom: 10px;
}

.pub-entry hr {
  margin-top: 10px;
  margin-bottom: 10px;
}

.pub-entry img {
  display: block;
  height: auto;
  width: 400px;
  margin: 10px auto;
}

.pub-entry a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px dotted rgba(0, 0, 0, 0.3);
}

.pub-entry a:hover {
  font-size: 1.05em
}

/* ========================= *
/* Image Helpers */
/* ========================= */
.imgbox {
  display: grid;
  height: 100%;
}

.center-fit {
  max-width: 100%;
  max-height: 100vh;
  margin: auto;
}

.image-wrapper {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  margin-bottom: 20px;
}

.image-wrapper img {
  max-width: 500px;
  width: 100%;
  height: auto;
  object-fit: contain;
  display: block;
  border-radius: 10px;
}

#maps {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.map-container {
  width: 100%;
  max-width: 600px;
  aspect-ratio: 4 / 3;
  margin: 20px auto;
  overflow: hidden;
}

.map-container iframe {
  width: 100%;
  height: 100%;
  border: 0;
  display: block;
}


.news-index-date {
  font-size: 16px;
  font-weight: 500;
}

.news-list li {
  margin-bottom: 0.75em;
  line-height: 1.6;
}

.news-list a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px dotted rgba(0, 0, 0, 0.3);
}

.news-list a:hover {
  font-weight: bold;
}

.open-position a {
  color: inherit;
  text-decoration: none;
  transition: color 0.3s ease;
  border-bottom: 1px dotted rgba(0, 0, 0, 0.3);
}

.open-position a:hover {
  font-size: 1.02em;
}

.open-position p {
  margin-bottom: 1.5em;
}

#pagination-container {
  display: flex;
  justify-content: center;
  gap: 10px;
  padding: 20px 0;
}

body#news .page-wrapper {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

body#news main {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 400px; /* adjust as needed */
}

.news-list {
  margin-top: 0;
  flex-grow: 1;
  padding-left: 20px;
}

#pagination-container {
  margin-top: 30px;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 10px;
  padding: 20px 0;
}

#pagination-container button {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 20px;
  color: var(--text-dark);
  transition: transform 0.2s ease;
}

#pagination-container button.dot-button {
  font-size: 16px;
  color: #aaa;
}

#pagination-container button.dot-button:hover {
  transform: scale(1.5);
  color: #555;
}

#pagination-container button.active-number {
  font-size: 18px;
  color: black;
}

#news-content img {
  max-width: 100%;
  max-height: 500px;
  width: auto;
  height: auto;
  display: block;
  margin: 1em auto;
}

#news-content h1 {
  font-size: 1.5em;
}

@media (max-width: 768px) {
  #news-content h1 {
    font-size: 1.3em;
}