:root {
  --primary: #7c3aed; /* Electric Violet */
  --primary-glow: rgba(124, 58, 237, 0.4);
  --secondary: #f43f5e; /* Rose Pink */
  --bg-color: #050510; /* Deep Midnight */
  --bg-gradient: radial-gradient(circle at 50% 0%, #1e1b4b 0%, #050510 70%);
  --card-bg: rgba(255, 255, 255, 0.03);
  --card-hover: rgba(255, 255, 255, 0.06);
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --border-color: rgba(255, 255, 255, 0.08);
  --glass-bg: rgba(10, 10, 20, 0.7);
  --glass-border: rgba(255, 255, 255, 0.1);
  --neon-shadow: 0 0 15px var(--primary-glow);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  font-family: 'Outfit', 'Inter', system-ui, sans-serif;
  background-color: var(--bg-color);
  background-image: var(--bg-gradient);
  color: var(--text-primary);
  line-height: 1.6;
  /* dvh = Dynamic Viewport Height (모바일 주소창 제외) */
  min-height: calc(var(--vh, 1vh) * 100); /* 구버전 WebView 폴백 */
  min-height: 100dvh;
  overflow-x: hidden;
  /* Flutter WebView / iOS WebView 공통 설정 */
  -webkit-tap-highlight-color: transparent; /* 터치 파란 하이라이트 제거 */
  -webkit-text-size-adjust: 100%;           /* 가로모드 전환 시 폰트 자동 확대 방지 */
  text-size-adjust: 100%;
}

/* 스크롤바 디자인 */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-color);
}
::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--primary);
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 20px;
}

@media (max-width: 768px) {
  .container {
    padding: 20px 15px;
  }
}

/* 네비게이션 (반응형) */
nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 5%;
  /* iOS 노치/다이나믹아일랜드 safe-area 대응 */
  padding-top: calc(15px + env(safe-area-inset-top, 0px));
  padding-left: calc(5% + env(safe-area-inset-left, 0px));
  padding-right: calc(5% + env(safe-area-inset-right, 0px));
  background: var(--glass-bg);
  backdrop-filter: blur(15px);
  border-bottom: 1px solid var(--glass-border);
  position: sticky;
  top: 0;
  z-index: 1000;
  flex-wrap: wrap; /* 모바일 대응 */
  gap: 15px;
}

nav .brand {
  font-size: 1.8rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, #fff 0%, var(--primary) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 0 10px var(--primary-glow));
}

nav .menu {
  display: flex;
  align-items: center;
}

nav .menu a {
  margin-left: 20px;
  font-weight: 500;
  color: var(--text-secondary);
  font-size: 0.9rem;
  white-space: nowrap;
}

nav .menu a:hover, nav .menu a.active {
  color: var(--text-primary);
  text-shadow: 0 0 10px var(--primary-glow);
}

@media (max-width: 768px) {
  nav {
    padding: 15px 20px;
    justify-content: center;
  }
  nav .brand {
    font-size: 1.5rem;
  }
  nav .menu {
    width: 100%;
    justify-content: center;
    overflow-x: auto;
    padding-bottom: 5px;
  }
  nav .menu a {
    margin-left: 15px;
    margin-right: 5px;
    font-size: 0.85rem;
  }
}

/* 버튼 공통 스타일 (프리미엄 고도화) */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 16px 36px;
  border-radius: 50px; /* 완전한 라운딩 */
  font-weight: 700;
  font-size: 1.1rem;
  cursor: pointer;
  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  text-decoration: none;
  border: none;
  gap: 10px;
  letter-spacing: -0.01em;
}

/* 메인 버튼: 네온 바이올렛 그라데이션 */
.btn-primary {
  background: linear-gradient(135deg, #8b5cf6, #d946ef);
  color: white;
  box-shadow: 0 10px 25px rgba(139, 92, 246, 0.4), 0 0 15px rgba(217, 70, 239, 0.2);
}

.btn-primary:hover {
  box-shadow: 0 20px 40px rgba(139, 92, 246, 0.6), 0 0 30px rgba(217, 70, 239, 0.4);
}

/* 보조 버튼: 글래스모피즘 */
.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: white;
  border: 1px solid rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.4);
}

/* 삭제/위험 버튼 (은은하고 멋진 고급 버전) */
.btn-danger {
  background: linear-gradient(135deg, rgba(244, 63, 94, 0.18), rgba(244, 63, 94, 0.08));
  color: #ff9ca3;
  border: 1px solid rgba(244, 63, 94, 0.35);
  box-shadow: 0 8px 20px rgba(244, 63, 94, 0.1);
}
.btn-danger:hover {
  background: linear-gradient(135deg, rgba(244, 63, 94, 0.3), rgba(244, 63, 94, 0.2));
  border-color: rgba(244, 63, 94, 0.6);
  color: #fff;
  box-shadow: 0 12px 30px rgba(244, 63, 94, 0.25);
}

.btn-success {
  background: linear-gradient(135deg, #059669, #10b981);
  color: white;
  box-shadow: 0 10px 25px rgba(16, 185, 129, 0.25);
}
.btn-success:hover {
  box-shadow: 0 15px 35px rgba(16, 185, 129, 0.4);
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--primary);
  color: var(--primary);
}
.btn-outline:hover {
  background: var(--primary);
  color: #fff;
}

.btn-sm {
  padding: 10px 22px;
  font-size: 0.9rem;
}

/* 마우스 포인터 기기에서만 transform 적용 (터치 hover 고착 방지) */
@media (hover: hover) and (pointer: fine) {
  .btn:hover { transform: translateY(-5px) scale(1.02); }
  .btn-sm:hover { transform: translateY(-2px); }
}

/* "전체 보기" 전용 캡슐 버튼 */
.view-all-btn {
  display: inline-flex;
  align-items: center;
  padding: 10px 28px;
  background: rgba(139, 92, 246, 0.1);
  color: #c084fc;
  border-radius: 30px;
  font-size: 0.95rem;
  font-weight: 700;
  text-decoration: none;
  transition: all 0.3s ease;
  border: 1px solid rgba(139, 92, 246, 0.2);
  margin-top: 10px;
}

.view-all-btn:hover {
  background: rgba(139, 92, 246, 0.2);
  border-color: rgba(139, 92, 246, 0.5);
  color: #e879f9;
  box-shadow: 0 0 20px rgba(139, 92, 246, 0.2);
}
@media (hover: hover) and (pointer: fine) {
  .view-all-btn:hover { transform: translateX(5px); }
}

/* 카드 디자인 */
.card {
  background: var(--card-bg);
  border: 1px solid var(--glass-border);
  border-radius: 24px;
  padding: 30px;
  backdrop-filter: blur(10px);
  transition: all 0.4s ease;
}

.card:hover {
  background: var(--card-hover);
  border-color: var(--primary);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

/* 타이포그래피 */
h1, h2, h3 {
  letter-spacing: -0.03em;
  margin-bottom: 1rem;
  font-weight: 700;
}

.hero-text {
  font-size: 4rem;
  background: linear-gradient(to bottom, #fff 30%, #94a3b8 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.1;
}

@media (max-width: 768px) {
  .hero-text {
    font-size: 2.8rem;
  }
}

/* 아바타 그리드 (스카이피플 스타일 - 대형 4열 갤러리) */
.avatar-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr); /* 유연하게 4열 배치 */
  gap: 20px;
  justify-content: center;
  margin: 0 auto;
  width: 100%;
  max-width: 1100px;
}

.avatar-card {
  aspect-ratio: 1 / 1; /* 정사각형 유지 */
  background: #111;
  border-radius: 20px; /* 더 부드러운 라운딩 */
  overflow: hidden;
  position: relative;
  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  cursor: pointer;
  border: 1px solid rgba(255, 255, 255, 0.15); /* 은은한 액자 라인 */
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
}

.avatar-card:hover {
  border-color: var(--primary);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6), 0 0 20px rgba(124, 58, 237, 0.3);
}

.avatar-img-wrapper {
  width: 100%;
  height: 100%;
  margin-bottom: 0;
  border: none;
  position: relative;
}

.avatar-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top;
  transition: transform 0.8s ease;
  image-rendering: auto;
  backface-visibility: hidden;
  transform: translateZ(0);
  filter: saturate(1.04) contrast(1.02);
}

/* 마우스 장치에서만 이미지 확대 효과 (터치 hover 고착 방지) */
@media (hover: hover) and (pointer: fine) {
  .avatar-card:hover { transform: scale(1.04) translateY(-8px); }
  .avatar-card:hover .avatar-img { transform: scale(1.05); }
}

/* 이미지 하단 그라데이션 오버레이 (텍스트 시인성 극대화) */
.avatar-info {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  padding: 40px 20px 15px 20px;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.9) 0%, rgba(0, 0, 0, 0.4) 60%, transparent 100%);
  text-align: left;
  z-index: 2;
}

.avatar-info h3 {
  font-size: 1.1rem;
  margin: 0 0 5px 0;
  color: #ffffff;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.avatar-info .meta {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 0;
  font-weight: 500;
}

@media (max-width: 1000px) {
  .avatar-grid {
    grid-template-columns: repeat(2, 1fr);
    max-width: 600px;
  }
}

@media (max-width: 500px) {
  .avatar-grid {
    /* 1열 → 2열: 모바일에서 카드가 너무 크게 표시되는 문제 수정 */
    grid-template-columns: repeat(2, 1fr);
    max-width: 100%;
  }
}

/* ------------------------------------ */
/* 인증(로그인/회원가입) 공통 컨테이너 */
/* ------------------------------------ */
.auth-container {
  max-width: 500px;
  margin: 60px auto;
  position: relative;
  width: 95%; /* 모바일 대응 */
}

@media (max-width: 768px) {
  .auth-container {
    margin: 40px auto;
  }
}

/* 폼 디자인 */
.form-group {
  margin-bottom: 20px;
}
.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
  font-size: 0.9rem;
  color: var(--text-secondary);
}
.form-group input {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  padding: 14px;
  color: white;
  width: 100%;
  transition: all 0.3s;
  /* iOS WebView: font-size 16px 미만 시 입력 포커스 자동 확대(zoom) 방지 */
  font-size: 16px;
}
.form-group input:focus {
  outline: none;
  border-color: var(--primary);
  background: rgba(255, 255, 255, 0.06);
  box-shadow: 0 0 15px var(--primary-glow);
}

/* ------------------------------------ */
/* 채팅 페이지 반응형 레이아웃 */
/* ------------------------------------ */
.chat-wrapper {
  display: flex;
  gap: 25px;
  align-items: flex-start;
  max-width: 1000px;
  margin: 0 auto;
  padding: 20px 0;
}

.chat-sidebar {
  width: 280px;
  text-align: center;
  position: sticky;
  top: 100px;
  flex-shrink: 0;
  transition: all 0.8s cubic-bezier(0.19, 1, 0.22, 1);
  z-index: 100;
}

.chat-sidebar.minimized {
  transform: translateX(-100%) scale(0.9);
  opacity: 0;
  visibility: hidden;
  position: absolute; /* 공간을 차지하지 않도록 */
}

/* Peek Button (When sidebar is hidden) */
.peek-btn {
  position: fixed;
  left: 20px;
  top: 50%;
  transform: translateY(-50%);
  width: 40px;
  height: 80px;
  background: var(--card-bg);
  backdrop-filter: blur(15px);
  border: 1px solid var(--glass-border);
  border-left: none;
  border-radius: 0 12px 12px 0;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 90;
  color: var(--primary);
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s;
}

.peek-btn.visible {
  opacity: 1;
  visibility: visible;
}

.peek-btn:hover {
  width: 50px;
  color: white;
}

/* Pin Button inside sidebar */
.pin-btn {
  position: absolute;
  top: 15px;
  right: 15px;
  background: none;
  border: none;
  cursor: pointer;
  color: rgba(255, 255, 255, 0.3);
  transition: all 0.3s;
  padding: 5px;
}

.pin-btn:hover { color: var(--primary); }
.pin-btn.active { color: var(--secondary); transform: rotate(-45deg); }

.chat-avatar-img {
  width: 150px;
  height: 150px;
  border-radius: 50%;
  object-fit: cover;
  margin-bottom: 15px;
  border: 3px solid var(--primary);
  box-shadow: 0 0 20px var(--primary-glow);
}

.chat-meta {
  text-align: left;
  font-size: 0.9rem;
  color: var(--text-secondary);
  border-top: 1px solid var(--glass-border);
  margin-top: 15px;
  padding-top: 15px;
}

.chat-meta p {
  margin: 8px 0;
}

.chat-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  /* dvh: 모바일 주소창 높이 제외한 실제 뷰포트 */
  height: calc(var(--vh, 1vh) * 100 - 180px); /* 구형 WebView 폴백 */
  height: calc(100dvh - 180px);
  min-height: 400px;
}

.chat-window {
  flex: 1;
  background: var(--card-bg);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  padding: 20px;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch; /* iOS WebView 모멘텀 스크롤 */
  display: flex;
  flex-direction: column;
  gap: 15px;
  backdrop-filter: blur(10px);
}

.chat-input-area {
  display: flex;
  gap: 10px;
  margin-top: 20px;
}

.chat-input-area input {
  flex: 1;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--glass-border);
  border-radius: 15px;
  padding: 15px 20px;
  color: white;
  transition: all 0.3s;
  font-size: 16px; /* iOS WebView zoom 방지 */
}

.chat-input-area input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 15px var(--primary-glow);
}

/* 채팅 메시지 스타일 */
.chat-msg {
  max-width: 80%;
  padding: 12px 18px;
  border-radius: 20px;
  font-size: 0.95rem;
  line-height: 1.5;
  position: relative;
}

.chat-ai {
  align-self: flex-start;
  background: rgba(124, 58, 237, 0.15);
  color: #e2e8f0;
  border-bottom-left-radius: 5px;
  border: 1px solid rgba(124, 58, 237, 0.3);
}

.chat-user {
  align-self: flex-end;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white;
  border-bottom-right-radius: 5px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

/* 모바일 전용 반응형 쿼리 추가 */
@media (max-width: 900px) {
  .chat-sidebar {
    position: fixed;
    top: 50%;
    left: 20px;
    transform: translateY(-50%);
    width: 280px;
    height: auto;
    z-index: 1100;
    box-shadow: 0 20px 50px rgba(0,0,0,0.5);
  }

  .chat-sidebar.minimized {
    transform: translate(-120%, -50%);
  }

  .chat-sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0,0,0,0.6);
    backdrop-filter: blur(5px);
    z-index: 1099;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
  }

  .chat-sidebar-overlay.active {
    opacity: 1;
    visibility: visible;
  }

  .chat-wrapper {
    flex-direction: column;
    padding: 10px;
  }
  
  .chat-main {
    height: calc(var(--vh, 1vh) * 100 - 150px);
    height: calc(100dvh - 150px);
    width: 100%;
  }
}

@media (max-width: 600px) {
  .container {
    padding: 20px 15px;
  }
  
  .hero-text {
    font-size: 2rem !important;
  }
  
  .btn {
    width: 100%; /* 버튼 가득 채우기 */
    padding: 14px 24px;
    font-size: 1rem;
  }

  .chat-sidebar {
    padding: 15px;
  }
  
  .chat-sidebar h3 {
    font-size: 1.1rem;
  }
  
  .chat-msg {
    max-width: 90%;
    font-size: 0.9rem;
  }
}

/* Hamburger & Side Drawer */
.hamburger {
  display: flex;
  flex-direction: column;
  gap: 6px;
  cursor: pointer;
  z-index: 1001;
  /* 최소 터치 타깃 44×44px (Apple HIG / Material Design 권장) */
  padding: 10px;
  min-width: 44px;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  margin-left: 20px;
  user-select: none;
  -webkit-user-select: none;
  touch-action: manipulation;
}

.hamburger span {
  display: block;
  width: 28px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all 0.3s ease;
}

.hamburger.active span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

.side-drawer {
  position: fixed;
  top: 0;
  right: -320px;
  width: 320px;
  height: 100vh;
  height: 100dvh;
  background: rgba(10, 10, 18, 0.85);
  backdrop-filter: blur(25px);
  -webkit-backdrop-filter: blur(25px);
  border-left: 1px solid rgba(255, 255, 255, 0.1);
  z-index: 1000;
  /* safe-area: 노치/아일랜드/홈바 영역 보호 */
  padding: calc(100px + env(safe-area-inset-top, 0px))
           calc(30px + env(safe-area-inset-right, 0px))
           calc(40px + env(safe-area-inset-bottom, 0px))
           30px;
  transition: right 0.4s cubic-bezier(0.85, 0, 0.15, 1);
  display: flex;
  flex-direction: column;
  box-shadow: -10px 0 50px rgba(0, 0, 0, 0.5);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.side-drawer.active {
  right: 0;
}

.drawer-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  height: 100dvh;
  background: rgba(0, 0, 0, 0.5);
  z-index: 999;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
}

.drawer-overlay.active {
  opacity: 1;
  visibility: visible;
}

.drawer-header {
  margin-bottom: 40px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  padding-bottom: 20px;
}

.drawer-user-info {
  display: flex;
  align-items: center;
  gap: 15px;
}

.drawer-user-avatar {
  width: 45px;
  height: 45px;
  border-radius: 50%;
  background: var(--primary-glow);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
}

.drawer-nav {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.drawer-nav a {
  padding: 15px 20px;
  border-radius: 12px;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 1rem;
  font-weight: 600;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  gap: 12px;
}

.drawer-nav a:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--primary);
}
@media (hover: hover) and (pointer: fine) {
  .drawer-nav a:hover { transform: translateX(5px); }
}

.drawer-nav a i {
  font-size: 1.2rem;
}

.drawer-footer {
  margin-top: auto;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}