/* ARDDONG v5.0 — Claude Code 영감 다크 테마 */

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

:root {
  --bg-0: #0d1117;            /* 메인 배경 */
  --bg-1: #161b22;            /* 사이드바 */
  --bg-2: #1c2128;            /* 카드 */
  --bg-input: #0d1117;
  --border: #30363d;
  --border-soft: #21262d;
  --text-0: #e6edf3;          /* 본문 */
  --text-1: #b1bac4;          /* 보조 */
  --text-2: #7d8590;          /* 흐림 */
  --accent: #58a6ff;          /* 강조 (사용자 메시지) */
  --accent-warm: #d4a72c;     /* 비서 응답 강조 */
  --code-bg: #161b22;
  --user-bg: #1c2a3a;
  --user-border: #2c4a6a;
  --asst-bg: transparent;
  --danger: #f85149;
  --ok: #3fb950;
}

html, body {
  height: 100%;
  background: var(--bg-0);
  color: var(--text-0);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans KR",
               "Apple SD Gothic Neo", sans-serif;
  font-size: 15px;
  line-height: 1.55;
}

.app {
  display: flex;
  height: 100vh;
  overflow: hidden;
}

/* ============================================
   사이드바
============================================ */
.sidebar {
  width: 260px;
  background: var(--bg-1);
  border-right: 1px solid var(--border-soft);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  transition: margin-left 0.25s;
}

.sidebar.collapsed {
  margin-left: -260px;
}

.sidebar-head {
  padding: 14px;
  border-bottom: 1px solid var(--border-soft);
  display: flex;
  gap: 8px;
}

.new-conv-btn {
  flex: 1;
  background: var(--bg-2);
  color: var(--text-0);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 9px 12px;
  font-size: 14px;
  cursor: pointer;
  transition: background 0.15s;
}

.new-conv-btn:hover {
  background: var(--border-soft);
}

.toggle-sidebar {
  background: transparent;
  color: var(--text-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  width: 36px;
  cursor: pointer;
  font-size: 18px;
}

.toggle-sidebar:hover {
  color: var(--text-0);
}

.conv-list {
  flex: 1;
  overflow-y: auto;
  padding: 8px;
}

.conv-item {
  padding: 9px 12px;
  border-radius: 6px;
  cursor: pointer;
  color: var(--text-1);
  font-size: 14px;
  margin-bottom: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  position: relative;
}

.conv-item:hover {
  background: var(--bg-2);
  color: var(--text-0);
}

.conv-item.active {
  background: var(--bg-2);
  color: var(--text-0);
}

.conv-item .conv-time {
  display: block;
  font-size: 11px;
  color: var(--text-2);
  margin-top: 2px;
}

.conv-item .del-btn {
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  background: transparent;
  color: var(--text-2);
  border: none;
  cursor: pointer;
  opacity: 0;
  font-size: 14px;
}

.conv-item:hover .del-btn {
  opacity: 1;
}

.conv-item .del-btn:hover {
  color: var(--danger);
}

.sidebar-foot {
  padding: 12px 14px;
  border-top: 1px solid var(--border-soft);
}

.model-selector {
  margin-bottom: 10px;
}

.model-selector label {
  display: block;
  font-size: 11px;
  color: var(--text-2);
  letter-spacing: 0.5px;
  margin-bottom: 4px;
  text-transform: uppercase;
}

.model-selector select {
  width: 100%;
  background: var(--bg-2);
  color: var(--text-0);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 7px 10px;
  font-size: 13px;
  cursor: pointer;
}

.brand {
  color: var(--text-2);
  font-size: 11px;
  letter-spacing: 1px;
  text-align: center;
}

.user-info {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 12px;
  margin-bottom: 10px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.user-label {
  color: var(--text-2);
  font-size: 11px;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.user-name {
  color: var(--accent);
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  padding: 2px 8px;
  border-radius: 4px;
}

.user-name:hover {
  background: rgba(88, 166, 255, 0.1);
}

/* ============================================
   메인 채팅 영역
============================================ */
.chat-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.chat-header {
  padding: 14px 24px;
  border-bottom: 1px solid var(--border-soft);
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.mobile-menu {
  display: none;
  background: transparent;
  color: var(--text-1);
  border: 1px solid var(--border);
  border-radius: 6px;
  width: 34px;
  height: 34px;
  cursor: pointer;
  font-size: 18px;
}

.chat-title {
  flex: 1;
  font-weight: 600;
  color: var(--text-0);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.chat-status {
  color: var(--text-2);
  font-size: 12px;
}

.chat-status.thinking::before {
  content: "● ";
  color: var(--accent-warm);
  animation: pulse 1.2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

/* ============================================
   채팅 본문
============================================ */
.chat-body {
  flex: 1;
  overflow-y: auto;
  padding: 24px 0;
}

.welcome {
  max-width: 720px;
  margin: 0 auto;
  padding: 60px 24px;
  text-align: center;
}

.welcome h1 {
  font-size: 28px;
  font-weight: 600;
  color: var(--text-0);
  margin-bottom: 8px;
}

.welcome p {
  color: var(--text-1);
  margin-bottom: 32px;
}

.welcome-hints {
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-width: 480px;
  margin: 0 auto;
}

.hint {
  background: var(--bg-1);
  border: 1px solid var(--border-soft);
  border-radius: 8px;
  padding: 12px 16px;
  text-align: left;
  font-size: 14px;
  color: var(--text-1);
}

/* 메시지 ─────────────────────────────────── */
.msg {
  max-width: 760px;
  margin: 0 auto 24px;
  padding: 0 24px;
}

.msg-role {
  font-size: 12px;
  color: var(--text-2);
  letter-spacing: 0.5px;
  text-transform: uppercase;
  margin-bottom: 8px;
  font-weight: 600;
}

.msg.user .msg-role { color: var(--accent); }
.msg.assistant .msg-role { color: var(--accent-warm); }

.msg-content {
  color: var(--text-0);
  word-wrap: break-word;
}

.msg.user .msg-content {
  background: var(--user-bg);
  border: 1px solid var(--user-border);
  border-radius: 10px;
  padding: 14px 16px;
}

/* "생각 중..." 인디케이터 (응답 시작 전) */
.thinking-bubble {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-2);
  font-size: 14px;
  font-style: italic;
  padding: 8px 0;
}

.thinking-bubble::before {
  content: "💭";
  font-size: 16px;
  font-style: normal;
}

.thinking-bubble .dots span {
  display: inline-block;
  animation: dot-bounce 1.4s infinite;
}

.thinking-bubble .dots span:nth-child(2) { animation-delay: 0.2s; }
.thinking-bubble .dots span:nth-child(3) { animation-delay: 0.4s; }

@keyframes dot-bounce {
  0%, 60%, 100% { opacity: 0.3; transform: translateY(0); }
  30% { opacity: 1; transform: translateY(-3px); }
}

/* 응답 완료 후 사용 모델 작게 표시 */
.msg-footer {
  margin-top: 8px;
  padding-top: 6px;
  font-size: 10px;
  color: var(--text-2);
  letter-spacing: 0.3px;
  opacity: 0.55;
  font-family: "SF Mono", monospace;
}

.msg-footer .fallback-badge {
  color: var(--accent-warm);
  margin-left: 4px;
}

/* 마크다운 ─────────────────────────────────── */
.msg-content h1, .msg-content h2, .msg-content h3,
.msg-content h4, .msg-content h5, .msg-content h6 {
  margin: 18px 0 10px;
  font-weight: 600;
  color: var(--text-0);
}
.msg-content h1 { font-size: 22px; }
.msg-content h2 { font-size: 19px; }
.msg-content h3 { font-size: 16px; }

.msg-content p {
  margin-bottom: 10px;
}

.msg-content ul, .msg-content ol {
  margin: 6px 0 12px 24px;
}

.msg-content li {
  margin-bottom: 4px;
}

.msg-content code {
  background: var(--code-bg);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: "SF Mono", "Consolas", "Menlo", monospace;
  font-size: 13.5px;
  color: var(--accent);
}

.msg-content pre {
  background: var(--code-bg);
  border: 1px solid var(--border-soft);
  border-radius: 8px;
  padding: 14px 16px;
  overflow-x: auto;
  margin: 10px 0;
}

.msg-content pre code {
  background: transparent;
  padding: 0;
  color: var(--text-0);
  font-size: 13px;
  line-height: 1.5;
}

.msg-content table {
  border-collapse: collapse;
  margin: 12px 0;
  font-size: 14px;
  width: auto;
  max-width: 100%;
  overflow-x: auto;
  display: block;
}

.msg-content thead {
  background: var(--bg-2);
}

.msg-content th, .msg-content td {
  border: 1px solid var(--border);
  padding: 6px 12px;
  text-align: left;
}

.msg-content th {
  font-weight: 600;
  color: var(--text-0);
}

.msg-content blockquote {
  border-left: 3px solid var(--accent-warm);
  padding-left: 12px;
  margin: 10px 0;
  color: var(--text-1);
}

.msg-content a {
  color: var(--accent);
  text-decoration: underline;
}

.msg-content hr {
  border: none;
  border-top: 1px solid var(--border-soft);
  margin: 18px 0;
}

/* 비서 응답 - 작동 중 커서 */
.msg.assistant.streaming .msg-content::after {
  content: "▊";
  color: var(--accent-warm);
  animation: cursor-blink 1s infinite;
  margin-left: 2px;
}

@keyframes cursor-blink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0; }
}

/* 에러 표시 ───────────────────────────────── */
.msg.error .msg-content {
  background: rgba(248, 81, 73, 0.1);
  border: 1px solid rgba(248, 81, 73, 0.3);
  border-radius: 8px;
  padding: 12px 14px;
  color: var(--danger);
}

/* ============================================
   입력 영역
============================================ */
.chat-input-area {
  padding: 16px 24px 20px;
  border-top: 1px solid var(--border-soft);
  flex-shrink: 0;
}

.chat-input-wrap {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  gap: 10px;
  align-items: flex-end;
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px 12px;
}

.chat-input-wrap:focus-within {
  border-color: var(--accent);
}

#chat-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-0);
  font-family: inherit;
  font-size: 15px;
  resize: none;
  max-height: 200px;
  line-height: 1.5;
}

.send-btn {
  background: var(--accent);
  color: white;
  border: none;
  border-radius: 8px;
  width: 36px;
  height: 36px;
  cursor: pointer;
  font-size: 16px;
  flex-shrink: 0;
  transition: opacity 0.15s;
}

.send-btn:hover {
  opacity: 0.85;
}

.send-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* 첨부 버튼 */
.attach-btn {
  background: transparent;
  color: var(--text-1);
  border: none;
  width: 36px;
  height: 36px;
  cursor: pointer;
  font-size: 18px;
  flex-shrink: 0;
  border-radius: 8px;
  transition: background 0.15s, color 0.15s;
}

.attach-btn:hover {
  background: var(--bg-2);
  color: var(--accent);
}

/* 첨부 미리보기 */
.attach-preview {
  max-width: 760px;
  margin: 0 auto 10px;
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 8px 10px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.attach-preview img {
  width: 56px;
  height: 56px;
  object-fit: cover;
  border-radius: 6px;
  background: #000;
}

.attach-info {
  flex: 1;
  min-width: 0;
}

.attach-name {
  color: var(--text-0);
  font-size: 13px;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.attach-meta {
  color: var(--text-2);
  font-size: 11px;
  margin-top: 2px;
}

.attach-remove {
  background: transparent;
  color: var(--text-2);
  border: 1px solid var(--border);
  border-radius: 50%;
  width: 26px;
  height: 26px;
  cursor: pointer;
  font-size: 14px;
  line-height: 1;
  flex-shrink: 0;
}

.attach-remove:hover {
  background: var(--bg-2);
  color: #ff6b6b;
}

.input-hint {
  max-width: 760px;
  margin: 6px auto 0;
  color: var(--text-2);
  font-size: 11px;
  text-align: center;
}

/* ============================================
   모바일 반응형
============================================ */
@media (max-width: 768px) {
  .sidebar {
    position: absolute;
    z-index: 10;
    height: 100%;
    box-shadow: 0 0 30px rgba(0,0,0,0.5);
  }

  .sidebar.collapsed {
    margin-left: -260px;
  }

  .mobile-menu {
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .toggle-sidebar {
    display: none;
  }

  .msg, .chat-input-wrap {
    max-width: 100%;
  }

  .chat-header {
    padding: 12px 16px;
  }

  .chat-body {
    padding: 16px 0;
  }

  .msg {
    padding: 0 16px;
  }

  .chat-input-area {
    padding: 12px 16px 16px;
  }
}