:root {
  --purdue-gold: #cfb991;
  --dark-gold: #9d6500;
  --dark-text: #1f1f1f;
  --muted-text: #555555;
  --link-color: #0056a6;
  --line-color: #cfcfcf;
  --content-width: 1000px;
}

/* ========================================
   기본 설정
======================================== */

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: #ffffff;
  color: var(--dark-text);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 17px;
  line-height: 1.45;
}

.container {
  width: min(92%, var(--content-width));
  margin: 0 auto;
}

a {
  color: var(--link-color);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* ========================================
   상단 배경 이미지
======================================== */

.hero-header {
  position: relative;
  min-height: 220px;

  background-image:
          linear-gradient(
                  rgba(0, 0, 0, 0.18),
                  rgba(0, 0, 0, 0.42)
          ),
          url("../images/header.jpg");

  background-repeat: no-repeat;
  background-position: center center;
  background-size: cover;
}

.hero-overlay {
  min-height: 220px;
}

.hero-content {
  position: relative;

  width: min(92%, var(--content-width));
  min-height: 220px;

  margin: 0 auto;

  color: #ffffff;
}

/* ========================================
   오른쪽 위 연구 분야 문구
======================================== */

.hero-top-right {

  position: absolute;

  top: 8px;          /* 위로 */

  right: -80px;      /* 오른쪽으로 */

  /*color: #A36E00;    !* 밝은 하늘색 *!*/
  color: #C58A00;

  font-family: Arial, Helvetica, sans-serif;

  font-size: 22px;

  font-weight: 700;

  text-align: right;

  text-shadow:
          0 2px 5px rgba(0,0,0,0.8),
          0 4px 10px rgba(0,0,0,0.6);
}

/* ========================================
   왼쪽 아래 개인 정보
======================================== */

.hero-left {
  position: absolute;

  left: 0;
  bottom: 30px;

  color: #ffffff;
}

.hero-title {
  display: inline-block;

  color: #ffffff;

  font-family: Arial, Helvetica, sans-serif;
  font-size: 34px;
  font-weight: 700;
  letter-spacing: 0.1px;

  text-decoration: none;

  text-shadow:
          0 1px 3px rgba(0, 0, 0, 0.95),
          0 2px 8px rgba(0, 0, 0, 0.75);
}

.hero-title:hover {
  color: #ffffff;
  text-decoration: none;
}

.hero-subtitle {
  margin-top: 8px;

  font-family: Arial, Helvetica, sans-serif;
  font-size: 16px;
  font-weight: 500;

  text-shadow:
          0 1px 3px rgba(0, 0, 0, 0.95),
          0 2px 7px rgba(0, 0, 0, 0.75);
}

.hero-affiliation {
  margin-top: 5px;

  font-family: Arial, Helvetica, sans-serif;
  font-size: 15px;
  font-weight: 400;

  text-shadow:
          0 1px 3px rgba(0, 0, 0, 0.95),
          0 2px 7px rgba(0, 0, 0, 0.75);
}

/* ========================================
   메뉴
======================================== */

.site-navigation {
  background: #ffffff;
  border-bottom: 1px solid #bfbfbf;
}

.navigation-inner {
  display: flex;
  align-items: center;
  justify-content: center;

  min-height: 60px;

  gap: 60px;
}

.navigation-inner a {
  position: relative;

  padding: 20px 0 17px;

  color: #222222;

  font-family: Arial, Helvetica, sans-serif;
  font-size: 16px;
  font-weight: 400;

  text-decoration: none;
}

.navigation-inner a:hover {
  color: var(--dark-gold);
  text-decoration: none;
}

.navigation-inner a.active {
  color: var(--dark-gold);
  font-weight: 600;
}

.navigation-inner a.active::after {
  position: absolute;

  right: 0;
  bottom: -1px;
  left: 0;

  height: 3px;

  background: var(--dark-gold);

  content: "";
}

/* ========================================
   전체 본문
======================================== */

.page-content {
  min-height: 600px;

  padding-top: 34px;
  padding-bottom: 70px;
}

h1,
h2,
h3 {
  font-family: Georgia, "Times New Roman", serif;
  line-height: 1.2;
}

h1 {
  margin-top: 0;
  margin-bottom: 12px;

  color: #111111;

  font-size: 34px;
}

h2 {
  margin-top: 42px;
  margin-bottom: 18px;

  padding-bottom: 7px;

  border-bottom: 1px solid var(--line-color);

  color: var(--dark-gold);

  font-size: 25px;
}

h3 {
  margin-top: 28px;

  color: var(--dark-gold);

  font-size: 21px;
}

p {
  margin-top: 0;
  margin-bottom: 17px;
}

/* ========================================
   첫 화면 프로필 영역
======================================== */

.profile-layout {
  display: grid;

  grid-template-columns:
    minmax(290px, 340px)
    minmax(0, 1fr);

  gap: 70px;

  align-items: start;
}

.profile-left {
  text-align: center;
}

.profile-image {
  display: block;

  width: 100%;
  max-width: 340px;

  margin: 0 auto;

  border: 1px solid #d8d8d8;
}

.profile-caption {
  margin-top: 9px;

  color: #444444;

  font-family: Arial, Helvetica, sans-serif;
  font-size: 13px;
}

.profile-right {
  padding-top: 0;
  text-align: center;
}

.profile-name {
  margin-top: 0;
  margin-bottom: 10px;

  color: #111111;

  font-size: 32px;
}

.profile-position {
  margin-bottom: 18px;

  color: var(--dark-gold);

  font-size: 19px;
  font-weight: 700;
  line-height: 1.18;
}

.profile-details {
  margin-top: 15px;

  font-size: 17px;
  line-height: 1.3;
}

.profile-details strong {
  color: #111111;
}

.profile-links {
  margin-top: 20px;

  font-family: Arial, Helvetica, sans-serif;
  font-size: 15px;
}

.profile-links a {
  display: inline-block;

  margin: 4px 9px;
}

.main-divider{

  position: relative;

  left: 50%;

  transform: translateX(-50%);

  width: 1200px;

  max-width: 95vw;

  margin: 45px 0 35px;

  border: 0;

  border-top: 1px solid #999999;

}

/* ========================================
   Biography
======================================== */

.biography-section h2 {
  margin-bottom: 20px;

  padding-bottom: 0;

  border-bottom: 0;
}

.biography-section p {
  text-align: justify;
}

/* ========================================
   학위 및 연구 관심사
======================================== */

.degree-list,
.research-list {
  margin: 0;
  padding-left: 34px;
}

.degree-list li,
.research-list li {
  margin-bottom: 7px;
}

/* ========================================
   소식
======================================== */

.news-table {
  width: 100%;

  border-collapse: collapse;
}

.news-table td {
  padding: 8px 4px;

  vertical-align: top;

  border-bottom: 1px dotted #cccccc;
}

.news-date {
  width: 125px;

  color: var(--dark-gold);

  font-weight: 700;

  white-space: nowrap;
}

/* ========================================
   논문
======================================== */

.publication {
  margin-bottom: 25px;
}

.publication-title {
  font-weight: 700;
}

.publication-authors {
  margin-top: 3px;
}

.publication-venue {
  margin-top: 3px;

  font-style: italic;
}

.publication-links {
  margin-top: 5px;

  font-family: Arial, Helvetica, sans-serif;
  font-size: 14px;
}

.publication-links a {
  margin-right: 12px;
}

/* ========================================
   바닥글
======================================== */

.site-footer {
  padding: 25px 0;

  border-top: 1px solid var(--line-color);

  color: #666666;

  font-family: Arial, Helvetica, sans-serif;
  font-size: 13px;
}

.footer-inner {
  display: flex;

  justify-content: space-between;

  gap: 25px;
}

/* ========================================
   태블릿 화면
======================================== */

@media (max-width: 850px) {
  .hero-header,
  .hero-overlay,
  .hero-content {
    min-height: 215px;
  }

  .hero-top-right {
    top: 20px;

    font-size: 18px;
  }

  .hero-left {
    bottom: 25px;
  }

  .hero-title {
    font-size: 30px;
  }

  .hero-subtitle {
    font-size: 17px;
  }

  .hero-affiliation {
    font-size: 14px;
  }

  .navigation-inner {
    flex-wrap: wrap;

    gap: 8px 30px;

    padding: 10px 0;
  }

  .navigation-inner a {
    padding: 9px 0;
  }

  .profile-layout {
    grid-template-columns: 1fr;

    gap: 30px;
  }

  .profile-image {
    max-width: 330px;
  }

  .profile-right {
    text-align: center;
  }

  .footer-inner {
    display: block;
  }

  .footer-inner div + div {
    margin-top: 7px;
  }
}

/* ========================================
   모바일 화면
======================================== */

@media (max-width: 560px) {
  body {
    font-size: 16px;
  }

  .hero-header,
  .hero-overlay,
  .hero-content {
    min-height: 230px;
  }

  .hero-top-right {
    top: 17px;
    right: 0;

    max-width: 220px;

    font-size: 15px;
    line-height: 1.3;
  }

  .hero-left {
    right: 0;
    bottom: 22px;
  }

  .hero-title {
    font-size: 27px;
  }

  .hero-subtitle {
    max-width: 330px;

    font-size: 15px;
    line-height: 1.3;
  }

  .hero-affiliation {
    max-width: 330px;

    font-size: 13px;
  }

  .navigation-inner {
    justify-content: flex-start;

    gap: 4px 24px;
  }

  .navigation-inner a {
    font-size: 15px;
  }

  h1 {
    font-size: 29px;
  }

  h2 {
    font-size: 23px;
  }

  .news-table,
  .news-table tbody,
  .news-table tr,
  .news-table td {
    display: block;
  }

  .news-date {
    width: auto;

    padding-bottom: 0 !important;

    border-bottom: 0 !important;
  }
}

/* ========================================
   Biography 이하 넓은 본문
======================================== */

.wide-content {
  width: min(1180px, calc(100vw - 80px));
  margin-left: 50%;
  transform: translateX(-50%);
}

.wide-content h2 {
  width: 100%;
}

.wide-content p {
  max-width: none;
}

.publication-divider {
  border: 0;
  border-top: 1px solid #d6d6d6;
  margin: 1.8rem 0 1.6rem;
}