* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Pretendard', sans-serif;
}

body {
  background: linear-gradient(135deg, #f9f9fb 0%, #eef2f7 100%);
  color: #1a1a1a;
  transition: background 0.3s, color 0.3s;
}

body.dark {
  background: linear-gradient(135deg, #1a1a1a 0%, #2b2b2b 100%);
  color: #f4f4f4;
}

/* 헤더 */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 40px;
  background-color: #ffffff;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
  position: sticky;
  top: 0;
  z-index: 1000;
}

body.dark header {
  background-color: #2a2a2a;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo {
  height: 80px;
}

.logo-link {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 30px;
}

nav a {
  text-decoration: none;
  color: #1e60c5;
  font-weight: bold;
  padding: 6px 14px;
  border-radius: 6px;
  background-color: #e6f0ff;
  transition: background-color 0.2s;
}
nav a:hover {
  background-color: #cfe3ff;
}
body.dark nav a {
  background-color: #444;
  color: #fff;
}

#darkToggle {
  background: none;
  border: none;
  font-size: 1.4rem;
  cursor: pointer;
}

/* 메인 영역 */
main {
  padding: 60px 0;
}

/* 프로필 카드: 가로 전체 사용 + 넓은 콘텐츠 */
.profile-card {
  max-width: 960px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 60px;
  background-color: #ffffff;
  padding: 60px 80px;
  border-radius: 16px;
  border-top: 8px solid #1e60c5;
  border-bottom: 8px solid #1e60c5;
  animation: fadeIn 0.6s ease-in-out;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
}
body.dark .profile-card {
  background-color: #2c2c2c;
  border-top: 8px solid #90c4ff;
  border-bottom: 8px solid #90c4ff;
  box-shadow: 0 10px 30px rgba(255, 255, 255, 0.05);
}


/* 아바타 */
.card-left .avatar,
.profile-card .avatar {
  width: 100%;
  aspect-ratio: 1 / 1;
  background-size: cover;
  background-position: center;
  border-radius: 20px;
}
.profile-card.cloud .avatar {
  border: 4px solid #1e60c5;
}
.profile-card.cyber .avatar {
  border: 4px dashed #b20000;
}

/* 오른쪽 */
.card-right {
  display: flex;
  flex-direction: column;
  gap: 32px;
}
.profile-info {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.profile-extra {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

/* 텍스트 정보 */
.card-right h2 {
  font-size: 2.8rem;
  margin-bottom: 6px;
}
.card-right .category {
  font-size: 1.4rem;
  color: #444;
  margin-bottom: 4px;
}
.card-right .joined {
  font-size: 1.2rem;
  color: #666;
  font-style: italic;
}
.card-right .bio {
  font-size: 1.3rem;
  color: #333;
}
body.dark .card-right .bio {
  color: #ccc;
}

/* GitHub 링크 */
.github-link {
  display: inline-block;
  padding: 14px 28px;
  background-color: #1e60c5;
  color: white;
  border-radius: 8px;
  text-decoration: none;
  font-weight: bold;
  font-size: 1.1rem;
  margin-top: 12px;
}
.github-link:hover {
  background-color: #144a96;
}

/* 기술 배지 */
.skill-badges {
  margin-bottom: 10px;
}
.badge {
  display: inline-block;
  background-color: #e6f0ff;
  color: #1e60c5;
  padding: 10px 16px;
  margin: 6px 6px 10px 0;
  border-radius: 16px;
  font-size: 1.05rem;
}
body.dark .badge {
  background-color: #3a3a3a;
  color: #90c4ff;
}

/* 타임라인 & 수상 기록 */
.timeline h3,
.achievements h3 {
  font-size: 1.4rem;
  color: #1e60c5;
  margin-bottom: 8px;
}
.timeline ul,
.achievements ul {
  list-style-type: disc;
  padding-left: 24px;
  color: #444;
}
.timeline li,
.achievements li {
  margin-bottom: 6px;
  font-size: 1.05rem;
}
body.dark .timeline ul,
body.dark .achievements ul {
  color: #ccc;
}

/* 애니메이션 */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* 반응형 */
@media (max-width: 1024px) {
  .profile-card {
    grid-template-columns: 1fr;
    padding: 40px 24px;
  }

  .card-left .avatar {
    width: 180px;
    margin: 0 auto 20px;
  }

  .card-right h2 {
    font-size: 2.2rem;
  }

  .card-right .category,
  .card-right .joined,
  .card-right .bio,
  .timeline li,
  .achievements li {
    font-size: 1rem;
  }

  .badge {
    font-size: 0.9rem;
    padding: 6px 12px;
  }
}