* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --bg: #ffffff;
  --bg-header: #f5f5f5;
  --bg-input: #ffffff;
  --bg-msg: #f9f9f9;
  --bg-msg-hover: #f0f0f0;
  --text: #333333;
  --text-secondary: #888888;
  --border: #c6c6c6;
  --accent: #f85232;
  --accent-hover: #d7472c;
  --system-bg: #fff3cd;
  --system-text: #856404;
  --notice-bg: #d4edda;
  --notice-text: #155724;
  --admin-color: #e74c3c;
  --member-color: #2c3e50;
  --guest-color: #7f8c8d;
  --error-bg: #f8d7da;
  --error-text: #721c24;
  --admin-panel-bg: #f8f9fa;
  --btn-danger: #dc3545;
  --btn-danger-hover: #c82333;
  --btn-success: #28a745;
  --btn-success-hover: #218838;
}

body.dark {
    --bg: #1f1f1f;
    --bg-header: #2e2e2e;
    --bg-input: #1f1f1f;
    --bg-msg: #16213e;
    --bg-msg-hover: #1a2744;
    --text: #e0e0e0;
    --text-secondary: #a0a0a0;
    --border: #636363;
    --accent: #f85232;
    --accent-hover: #d7472c;
    --system-bg: #3d3a00;
    --system-text: #ffc107;
    --notice-bg: #0a3d0a;
    --notice-text: #28a745;
    --admin-color: #ff6b6b;
    --member-color: #74b9ff;
    --guest-color: #a0a0a0;
    --error-bg: #4a1c24;
    --error-text: #f5c6cb;
    --admin-panel-bg: #2e2e2e;
    --btn-danger: #e74c3c;
    --btn-danger-hover: #c0392b;
    --btn-success: #27ae60;
    --btn-success-hover: #219a52;
}

html, body {
  height: 100%;
  font-family: 'Malgun Gothic', '맑은 고딕', sans-serif;
  font-size: 13px;
  color: var(--text);
  background: var(--bg);
}

/* 전체 레이아웃 */
#app {
  display: flex;
  flex-direction: column;
  height: 100%;
  border: 1px solid var(--border);
}

/* 헤더 */
#header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0px 10px;
  background: var(--bg-header);
  border-bottom: 1px solid var(--border);
  min-height: 32px;
}

#user-count {
  display: none;          /* 기본 숨김 (FOUC 방지) — JS가 조건에 따라 표시 */
  font-size: 11px;
  color: var(--text-secondary);
}

#user-count.visible { display: block; }

#user-count span { font-weight: bold; color: var(--accent); }

#admin-toggle-btn {
  display: none;
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 3px 8px;
  border-radius: 3px;
  cursor: pointer;
  font-size: 11px;
}

#admin-toggle-btn:hover { background: var(--accent-hover); }

/* 관리자 패널 */
#admin-panel {
  display: none;
  background: var(--admin-panel-bg);
  border-bottom: 1px solid var(--border);
  padding: 8px 10px;
  max-height: 280px;
  overflow-y: auto;
}

#admin-panel.active { display: block; }

.admin-section {
  margin-bottom: 8px;
}

.admin-section h4 {
  font-size: 11px;
  color: var(--text-secondary);
  margin-bottom: 4px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 2px;
}

.admin-section h4.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
}

.admin-section h4.section-header > span {
  flex: 1;
}

.admin-row {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 4px;
  flex-wrap: wrap;
}

.admin-row input, .admin-row select {
  padding: 3px 6px;
  border: 1px solid var(--border);
  border-radius: 3px;
  background: var(--bg-input);
  color: var(--text);
  font-size: 12px;
}

.admin-row input[type="text"] { flex: 1; min-width: 80px; }
.admin-row input[type="number"] { width: 60px; }

.btn-sm {
  padding: 3px 8px;
  border: none;
  border-radius: 3px;
  cursor: pointer;
  font-size: 11px;
  color: #fff;
}

.btn-danger { background: var(--btn-danger); }
.btn-danger:hover { background: var(--btn-danger-hover); }
.btn-success { background: var(--btn-success); }
.btn-success:hover { background: var(--btn-success-hover); }
.btn-primary { background: var(--accent); }
.btn-primary:hover { background: var(--accent-hover); }

.admin-list {
  max-height: 80px;
  overflow-y: auto;
  font-size: 11px;
}

.admin-list-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 2px 4px;
  border-bottom: 1px solid var(--border);
}

/* 접힘/펼침 섹션 */
.collapsible {
  cursor: pointer;
  user-select: none;
}

.collapsible:hover { color: var(--accent); }

.collapsible .arrow {
  display: inline-block;
  font-size: 9px;
  transition: transform 0.2s;
}

.collapsible.open .arrow { transform: rotate(90deg); }

.section-body { display: none; }

.section-body.open { display: block; }

/* 토글 스위치 */
.toggle-switch {
  position: relative;
  width: 36px;
  height: 18px;
  cursor: pointer;
}

.toggle-switch input { display: none; }

.toggle-slider {
  position: absolute;
  inset: 0;
  background: #ccc;
  border-radius: 9px;
  transition: 0.3s;
}

.toggle-slider::before {
  content: '';
  position: absolute;
  width: 14px;
  height: 14px;
  left: 2px;
  top: 2px;
  background: white;
  border-radius: 50%;
  transition: 0.3s;
}

.toggle-switch input:checked + .toggle-slider { background: var(--btn-success); }
.toggle-switch input:checked + .toggle-slider::before { transform: translateX(18px); }

/* 메시지 영역 */
#messages {
  flex: 1;
  overflow-y: auto;
  padding: 6px 10px;
  scroll-behavior: smooth;
}

.msg {
  padding: 3px 0;
  line-height: 1.5;
  word-wrap: break-word;
}

.msg { cursor: default; }
.msg:hover { background: var(--bg-msg-hover); border-radius: 3px; }

/* 모바일용 시간 툴팁 */
.msg-tooltip {
  position: absolute;
  right: 4px;
  top: -2px;
  background: rgba(0,0,0,0.8);
  color: #fff;
  font-size: 11px;
  padding: 2px 6px;
  border-radius: 3px;
  white-space: nowrap;
  z-index: 10;
  pointer-events: none;
  animation: tooltipFade 2s forwards;
}

@keyframes tooltipFade {
  0%, 70% { opacity: 1; }
  100% { opacity: 0; }
}

.msg .icon {
  display: inline-block;
  vertical-align: middle;
  margin-right: 2px;
}

.msg .icon img {
  width: 16px;
  height: 16px;
  /* vertical-align: middle; */
}

.msg .nick {
  font-weight: bold;
  cursor: default;
}

.msg .nick.admin { color: var(--admin-color); }
.msg .nick.member { color: var(--member-color); }
.msg .nick.guest { color: var(--guest-color); }

.msg .text { color: var(--text); }

/* 관리자용 차단 버튼 */
.msg .ban-btn {
  display: none;
  margin-left: 4px;
  font-size: 10px;
  color: var(--btn-danger);
  cursor: pointer;
  vertical-align: middle;
}

.msg:hover .ban-btn { display: inline; }

/* 시스템 메시지 */
.msg-system {
  padding: 4px 8px;
  margin: 3px 0;
  border-radius: 3px;
  border: dashed 1px;
  font-size: 12px;
  text-align: center;
}

.msg-system.join { color: var(--text-secondary); font-size: 11px; }
.msg-system.notice { background: var(--notice-bg); color: var(--notice-text); }
.msg-system.error { background: var(--error-bg); color: var(--error-text); }

/* 입력 영역 */
#input-area {
  display: flex;
  flex-direction: column;
  padding: 6px 10px;
  gap: 6px;
  border-top: 1px solid var(--border);
  background: var(--bg-header);
}

#input-row {
  display: flex;
  gap: 6px;
}

/* 관리자 폰트 툴바 */
#font-toolbar {
  display: flex;
  gap: 4px;
  align-items: center;
}

#font-toolbar select {
  padding: 3px 6px;
  font-size: 11px;
  border: 1px solid var(--border);
  border-radius: 3px;
  background: var(--bg-input);
  color: var(--text);
  outline: none;
}

.font-style-btn {
  width: 26px;
  height: 24px;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 3px;
  background: var(--bg-input);
  color: var(--text);
  cursor: pointer;
  font-size: 12px;
}

.font-style-btn.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.font-style-btn:hover { border-color: var(--accent); }

/* 메시지 본문 / 입력창 폰트 클래스 */
.text.font-malgun_gothic, #msg-input.font-malgun_gothic { font-family: "Malgun Gothic", "맑은 고딕", sans-serif; }
.text.font-nanum_gothic,  #msg-input.font-nanum_gothic  { font-family: "Nanum Gothic", "나눔고딕", sans-serif; }
.text.font-nanum_myeongjo,#msg-input.font-nanum_myeongjo{ font-family: "Nanum Myeongjo", "나눔명조", serif; }
.text.font-gulim,         #msg-input.font-gulim         { font-family: Gulim, "굴림", sans-serif; }
.text.font-batang,        #msg-input.font-batang        { font-family: Batang, "바탕", serif; }
.text.style-bold,   #msg-input.style-bold   { font-weight: bold; }
.text.style-italic, #msg-input.style-italic { font-style: italic; }

#msg-input {
  flex: 1;
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--bg-input);
  color: var(--text);
  font-size: 13px;
  outline: none;
}

#msg-input:focus { border-color: var(--accent); }

#msg-input:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

#send-btn {
  padding: 6px 16px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 13px;
}

#send-btn:hover { background: var(--accent-hover); }

/* 차단 모달 */
#ban-modal {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 100;
  align-items: center;
  justify-content: center;
}

#ban-modal.active { display: flex; }

.modal-content {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  width: 280px;
}

.modal-content h3 { font-size: 14px; margin-bottom: 10px; }

.modal-row {
  margin-bottom: 8px;
}

.modal-row label {
  display: block;
  font-size: 12px;
  margin-bottom: 3px;
  color: var(--text-secondary);
}

.modal-row input, .modal-row select {
  width: 100%;
  padding: 5px 8px;
  border: 1px solid var(--border);
  border-radius: 3px;
  background: var(--bg-input);
  color: var(--text);
  font-size: 12px;
}

.modal-actions {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
  margin-top: 12px;
}

/* 연결 해제 오버레이 */
#disconnect-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  z-index: 200;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 16px;
  text-align: center;
}

#disconnect-overlay.active { display: flex; }

/* 스크롤바 */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-secondary); }