/* ========================================
   RESET & BASE
   ======================================== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { font-size: 16px; }
body {
  font-family: 'Pretendard', system-ui, -apple-system, sans-serif;
  background: #0f1117;
  color: #e2e8f0;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
button { border: none; background: none; cursor: pointer; font-family: inherit; color: inherit; }
input, textarea, select { font-family: inherit; border: none; outline: none; background: none; color: inherit; }
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.08); border-radius: 3px; }

/* ========================================
   CSS 변수
   ======================================== */
:root {
  --bg: #0f1117;
  --bg-card: #161b22;
  --bg-card-hover: #1c2333;
  --bg-input: #0d1017;
  --border: rgba(255,255,255,0.06);
  --border-active: rgba(0,200,83,0.4);
  --green: #00c853;
  --green-dim: rgba(0,200,83,0.15);
  --green-hover: #00b348;
  --text: #e2e8f0;
  --text-secondary: #8b95a5;
  --text-muted: #555e6e;
  --danger: #ef4444;
  --warning: #f5a623;
  --sidebar-w: 240px;
}

/* ========================================
   레이아웃
   ======================================== */
.app {
  display: flex;
  height: 100vh;
  overflow: hidden;
}

/* ========================================
   사이드바
   ======================================== */
.sidebar {
  width: var(--sidebar-w);
  flex-shrink: 0;
  background: var(--bg-card);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.sidebar-header {
  padding: 20px 16px 16px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.sidebar-logo {
  font-size: 18px;
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.5px;
  margin-bottom: 12px;
}
.sidebar-logo span { color: var(--green); }
.btn-new-chat {
  width: 100%;
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  color: #fff;
  background: var(--green);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: background 0.15s;
  cursor: pointer;
}
.btn-new-chat:hover { background: var(--green-hover); }
.sidebar-nav {
  padding: 8px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border-radius: 7px;
  font-size: 13px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.12s;
}
.nav-item:hover { background: rgba(255,255,255,0.04); color: var(--text); }
.nav-item.active { background: var(--green-dim); color: var(--green); }
.profile-box {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.profile-photo {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--green-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 700;
  color: var(--green);
  flex-shrink: 0;
}
.profile-name { font-size: 13px; font-weight: 600; color: var(--text); }
.profile-clinic { font-size: 11px; color: var(--text-muted); }
.persona-edit-btn {
  font-size: 11px;
  color: var(--green);
  cursor: pointer;
  text-decoration: underline;
  background: none;
  border: none;
  padding: 0;
  margin-top: 4px;
}
.session-list {
  flex: 1;
  overflow-y: auto;
  padding: 8px;
  min-height: 0;
}
.session-group-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 8px 10px 4px;
}
.session-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 7px;
  font-size: 12px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.12s;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.session-item:hover { background: rgba(255,255,255,0.04); color: var(--text); }
.session-item.active { background: var(--green-dim); color: var(--green); }
.session-empty {
  padding: 16px 12px;
  font-size: 12px;
  color: var(--text-muted);
  text-align: center;
}
.sidebar-footer {
  padding: 12px 16px;
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}
.btn-logout {
  font-size: 12px;
  color: var(--text-muted);
  transition: color 0.15s;
  cursor: pointer;
}
.btn-logout:hover { color: var(--danger); }

/* ========================================
   토글 스위치
   ======================================== */
.toggle-switch {
  position: relative;
  display: inline-block;
  width: 36px;
  height: 20px;
  flex-shrink: 0;
}
.toggle-switch input { opacity: 0; width: 0; height: 0; }
.toggle-slider {
  position: absolute;
  inset: 0;
  background: #252b3d;
  border-radius: 20px;
  cursor: pointer;
  transition: 0.2s;
}
.toggle-slider::before {
  content: '';
  position: absolute;
  width: 14px; height: 14px;
  left: 3px; top: 3px;
  background: #555;
  border-radius: 50%;
  transition: 0.2s;
}
.toggle-switch input:checked + .toggle-slider { background: var(--green); }
.toggle-switch input:checked + .toggle-slider::before {
  transform: translateX(16px);
  background: #000;
}

/* ========================================
   모달
   ======================================== */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  z-index: 100;
  align-items: center;
  justify-content: center;
}
.modal-box {
  background: var(--bg-card);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 12px;
  width: 460px;
  max-height: 80vh;
  overflow-y: auto;
}
.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  font-size: 15px;
  font-weight: 600;
}
.modal-header button { color: var(--text-muted); font-size: 18px; }
.modal-content { padding: 16px 20px; }
.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  padding: 14px 20px;
  border-top: 1px solid var(--border);
}
.setting-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  font-size: 13px;
}
.setting-row:last-child { border-bottom: none; }
.setting-row select {
  background: #252b3d;
  border: 1px solid #333;
  color: var(--text);
  border-radius: 6px;
  padding: 5px 10px;
  font-size: 12px;
  cursor: pointer;
}

/* ========================================
   채널 목록
   ======================================== */
.channel-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 0;
  border-bottom: 1px solid rgba(255,255,255,0.04);
}
.channel-left {
  display: flex;
  align-items: center;
  gap: 10px;
}
.channel-icon {
  width: 28px; height: 28px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}
.channel-name { font-size: 13px; color: var(--text); }
.channel-badge {
  font-size: 10px;
  padding: 2px 6px;
  background: var(--green-dim);
  color: var(--green);
  border-radius: 4px;
}
.channel-right {
  display: flex;
  align-items: center;
  gap: 8px;
}
.btn-channel-setting {
  color: var(--text-muted);
  font-size: 14px;
  padding: 2px 6px;
  border-radius: 4px;
  transition: all 0.12s;
}
.btn-channel-setting:hover {
  background: rgba(255,255,255,0.06);
  color: var(--text);
}

/* ========================================
   버튼 공통
   ======================================== */
.btn-primary {
  padding: 10px 20px;
  background: var(--green);
  color: #000;
  border: none;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s;
}
.btn-primary:hover { background: var(--green-hover); }
.btn-secondary {
  padding: 10px 20px;
  background: none;
  color: var(--text-secondary);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.15s;
}
.btn-secondary:hover { border-color: rgba(255,255,255,0.2); color: var(--text); }
.btn-generate {
  width: 100%;
  padding: 14px;
  background: var(--green);
  color: #000;
  border: none;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.15s;
}
.btn-generate:hover { background: var(--green-hover); }

/* ========================================
   Toast
   ======================================== */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.toast {
  padding: 12px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 13px;
  color: var(--text);
  animation: slideIn 0.3s ease;
  max-width: 320px;
}
.toast.success { border-color: var(--border-active); color: var(--green); }
.toast.error { border-color: rgba(239,68,68,0.4); color: var(--danger); }
@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* ========================================
   로딩 스피너
   ======================================== */
.spinner {
  width: 20px; height: 20px;
  border: 2px solid rgba(255,255,255,0.1);
  border-top-color: var(--green);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ========================================
   카드
   ======================================== */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  transition: border-color 0.15s;
}
.card:hover { border-color: rgba(255,255,255,0.12); }
.card.active {
  border-color: var(--border-active);
  background: rgba(0,200,83,0.05);
}

/* ========================================
   폼
   ======================================== */
.form-group { margin-bottom: 16px; }
.form-label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 6px;
}
.form-input {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  color: var(--text);
  transition: border-color 0.15s;
}
.form-input:focus { border-color: var(--border-active); }
textarea.form-input { resize: vertical; min-height: 80px; }