/* ── 기본 리셋 & 변수 ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:        #0f1117;
  --bg2:       #1a1d27;
  --bg3:       #22263a;
  --border:    #2e3250;
  --primary:   #5b6ef5;
  --primary-h: #7282ff;
  --success:   #22c55e;
  --warning:   #f59e0b;
  --danger:    #ef4444;
  --info:      #38bdf8;
  --text:      #e2e8f0;
  --text-dim:  #8892b0;
  --sidebar-w: 220px;
  --header-h:  56px;
  --radius:    10px;
  --shadow:    0 4px 24px rgba(0,0,0,.4);
}

body {
  font-family: 'Pretendard', 'Noto Sans KR', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  display: flex;
  height: 100vh;
  overflow: hidden;
}

/* ── 스크롤바 ── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

/* ── 사이드바 ── */
#sidebar {
  width: var(--sidebar-w);
  background: var(--bg2);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  overflow: hidden;
}

.sidebar-logo {
  height: var(--header-h);
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 20px;
  border-bottom: 1px solid var(--border);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -.3px;
}

.sidebar-logo .logo-icon {
  width: 28px; height: 28px;
  background: var(--primary);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-size: 15px;
}

.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding: 12px 8px;
}

.nav-group-label {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--text-dim);
  padding: 12px 12px 6px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  color: var(--text-dim);
  transition: background .15s, color .15s;
  user-select: none;
}

.nav-item:hover { background: var(--bg3); color: var(--text); }
.nav-item.active { background: rgba(91,110,245,.18); color: var(--primary-h); font-weight: 600; }
.nav-item .icon { font-size: 16px; width: 20px; text-align: center; }

/* ── 메인 영역 ── */
#main {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* 헤더 */
#topbar {
  height: var(--header-h);
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 28px;
  flex-shrink: 0;
}

.topbar-title { font-size: 16px; font-weight: 700; }
.topbar-right { display: flex; align-items: center; gap: 12px; }

/* 콘텐츠 */
#content {
  flex: 1;
  overflow-y: auto;
  padding: 28px;
}

/* ── 공통 컴포넌트 ── */

/* 카드 */
.card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
}

.card-title {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* 그리드 */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }

/* 통계 카드 */
.stat-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
}
.stat-label { font-size: 12px; color: var(--text-dim); margin-bottom: 8px; }
.stat-value { font-size: 28px; font-weight: 700; line-height: 1; }
.stat-sub   { font-size: 12px; color: var(--text-dim); margin-top: 6px; }

/* 배지 */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
}
.badge-pending   { background: rgba(148,163,184,.15); color: #94a3b8; }
.badge-running   { background: rgba(56,189,248,.15);  color: var(--info); }
.badge-completed { background: rgba(34,197,94,.15);   color: var(--success); }
.badge-failed    { background: rgba(239,68,68,.15);   color: var(--danger); }
.badge-started   { background: rgba(91,110,245,.15);  color: var(--primary-h); }
.badge-cancelled { background: rgba(148,163,184,.15); color: var(--text-dim); }

/* 버튼 */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 14px; font-weight: 600;
  border: none; cursor: pointer;
  transition: opacity .15s, transform .1s;
}
.btn:active { transform: scale(.97); }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-h); }
.btn-secondary { background: var(--bg3); color: var(--text); border: 1px solid var(--border); }
.btn-secondary:hover { background: var(--border); }
.btn-danger { background: rgba(239,68,68,.15); color: var(--danger); border: 1px solid rgba(239,68,68,.3); }
.btn-danger:hover { background: rgba(239,68,68,.25); }
.btn-warning { background: rgba(234,179,8,.15); color: #ca8a04; border: 1px solid rgba(234,179,8,.3); }
.btn-warning:hover { background: rgba(234,179,8,.25); }
.btn-sm { padding: 5px 10px; font-size: 12px; }
.btn:disabled { opacity: .45; cursor: not-allowed; }

/* 입력 */
.input {
  width: 100%;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  padding: 9px 14px;
  font-size: 14px;
  outline: none;
  transition: border-color .15s;
}
.input:focus { border-color: var(--primary); }

.select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%238892b0' viewBox='0 0 16 16'%3E%3Cpath d='M7.247 11.14 2.451 5.658C1.885 5.013 2.345 4 3.204 4h9.592a1 1 0 0 1 .753 1.659l-4.796 5.48a1 1 0 0 1-1.506 0z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 32px;
}

/* 테이블 */
.table-wrap { overflow-x: auto; }
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
th {
  text-align: left;
  padding: 10px 14px;
  color: var(--text-dim);
  font-size: 12px;
  font-weight: 600;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
td {
  padding: 12px 14px;
  border-bottom: 1px solid rgba(46,50,80,.5);
  vertical-align: middle;
}
tr:last-child td { border-bottom: none; }
tr:hover td { background: rgba(91,110,245,.04); }

/* 드래그앤드롭 업로드 */
.upload-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 48px 24px;
  text-align: center;
  cursor: pointer;
  transition: border-color .2s, background .2s;
}
.upload-zone:hover,
.upload-zone.drag-over {
  border-color: var(--primary);
  background: rgba(91,110,245,.06);
}
.upload-icon { font-size: 40px; margin-bottom: 12px; }
.upload-label { font-size: 15px; font-weight: 600; margin-bottom: 6px; }
.upload-sub   { font-size: 13px; color: var(--text-dim); }

/* Step 타임라인 */
.steps-timeline { display: flex; flex-direction: column; gap: 0; }
.step-row {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  position: relative;
}
.step-row:not(:last-child)::before {
  content: '';
  position: absolute;
  left: 11px; top: 24px;
  width: 2px; height: calc(100% + 4px);
  background: var(--border);
}
.step-dot {
  width: 24px; height: 24px;
  border-radius: 50%;
  flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  font-size: 12px;
  margin-top: 2px;
  position: relative; z-index: 1;
}
.step-dot.pending   { background: var(--bg3); border: 2px solid var(--border); }
.step-dot.running   { background: rgba(56,189,248,.2); border: 2px solid var(--info); animation: pulse 1.5s infinite; }
.step-dot.completed { background: rgba(34,197,94,.2);  border: 2px solid var(--success); }
.step-dot.failed    { background: rgba(239,68,68,.2);  border: 2px solid var(--danger); }
@keyframes pulse {
  0%,100% { box-shadow: 0 0 0 0 rgba(56,189,248,.4); }
  50%      { box-shadow: 0 0 0 6px rgba(56,189,248,0); }
}
.step-info { flex: 1; padding: 0 0 20px; }
.step-name { font-size: 14px; font-weight: 600; }
.step-time { font-size: 12px; color: var(--text-dim); margin-top: 3px; }
.step-error {
  font-size: 12px; color: var(--danger);
  background: rgba(239,68,68,.08);
  border: 1px solid rgba(239,68,68,.2);
  border-radius: 6px;
  padding: 8px 10px;
  margin-top: 6px;
  white-space: pre-wrap;
  word-break: break-all;
  max-height: 120px; overflow-y: auto;
}

/* 섹션 트리 */
.section-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  transition: background .12s;
  border: 1px solid transparent;
}
.section-item:hover { background: var(--bg3); }
.section-item.active { background: rgba(91,110,245,.15); border-color: rgba(91,110,245,.3); }
.section-level { color: var(--text-dim); font-size: 12px; width: 24px; text-align: right; flex-shrink: 0; }
.section-title { flex: 1; }
.section-badge { font-size: 11px; color: var(--text-dim); background: var(--bg3); padding: 2px 7px; border-radius: 10px; }

/* 블록 뷰어 */
.block-card {
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  margin-bottom: 12px;
}
.block-header {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 14px;
  background: var(--bg3);
  font-size: 12px; font-weight: 600; color: var(--text-dim);
  border-bottom: 1px solid var(--border);
}
.block-type-text  { color: var(--info); }
.block-type-image { color: var(--warning); }
.block-type-table { color: var(--success); }
.block-content {
  padding: 14px;
  font-size: 13px;
  line-height: 1.7;
  white-space: pre-wrap;
  word-break: break-word;
  max-height: 280px;
  overflow-y: auto;
}

/* 명제 */
.proposition-item {
  padding: 10px 14px;
  border-left: 3px solid var(--primary);
  background: rgba(91,110,245,.06);
  border-radius: 0 8px 8px 0;
  margin-bottom: 8px;
  font-size: 13px;
  line-height: 1.6;
}
.prop-keywords { margin-top: 6px; display: flex; flex-wrap: wrap; gap: 4px; }
.kw-tag {
  font-size: 11px;
  padding: 2px 8px;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 12px;
  color: var(--text-dim);
}

/* 질의 인터페이스 */
.query-box {
  display: flex; gap: 10px;
  margin-bottom: 20px;
}
.query-box textarea {
  flex: 1;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  padding: 14px 16px;
  font-size: 15px;
  resize: none;
  outline: none;
  font-family: inherit;
  transition: border-color .15s;
  min-height: 100px;
}
.query-box textarea:focus { border-color: var(--primary); }

/* 답변 영역 */
.answer-box {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  min-height: 120px;
}
.answer-status {
  display: flex; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 600;
  margin-bottom: 14px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border);
}
.answer-text {
  font-size: 15px; line-height: 1.8;
  white-space: pre-wrap;
}
.sources-list {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
}
.sources-title { font-size: 12px; font-weight: 600; color: var(--text-dim); margin-bottom: 8px; }
.source-item { font-size: 12px; color: var(--text-dim); padding: 3px 0; }

/* 로딩 스피너 */
.spinner {
  width: 20px; height: 20px;
  border: 2px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin .7s linear infinite;
  display: inline-block;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* 빈 상태 */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-dim);
}
.empty-state .empty-icon { font-size: 48px; margin-bottom: 12px; }
.empty-state .empty-title { font-size: 16px; font-weight: 600; margin-bottom: 6px; }
.empty-state .empty-sub   { font-size: 14px; }

/* 토스트 */
#toast-container {
  position: fixed;
  bottom: 24px; right: 24px;
  display: flex; flex-direction: column; gap: 8px;
  z-index: 9999;
}
.toast {
  padding: 12px 18px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 500;
  box-shadow: var(--shadow);
  animation: slide-in .2s ease;
  max-width: 320px;
}
@keyframes slide-in { from { transform: translateX(60px); opacity: 0; } }
.toast-success { background: rgba(34,197,94,.15); border: 1px solid rgba(34,197,94,.3); color: var(--success); }
.toast-error   { background: rgba(239,68,68,.15); border: 1px solid rgba(239,68,68,.3); color: var(--danger); }
.toast-info    { background: rgba(91,110,245,.15); border: 1px solid rgba(91,110,245,.3); color: var(--primary-h); }

/* 폼 */
.form-row { margin-bottom: 16px; }
.form-label { font-size: 13px; font-weight: 600; color: var(--text-dim); margin-bottom: 6px; display: block; }

/* 탭 */
.tabs { display: flex; gap: 2px; border-bottom: 1px solid var(--border); margin-bottom: 20px; }
.tab {
  padding: 9px 18px;
  font-size: 14px; font-weight: 600;
  cursor: pointer;
  color: var(--text-dim);
  border-bottom: 2px solid transparent;
  transition: color .15s, border-color .15s;
  margin-bottom: -1px;
}
.tab:hover { color: var(--text); }
.tab.active { color: var(--primary-h); border-color: var(--primary); }

/* 구분선 */
.divider { border: none; border-top: 1px solid var(--border); margin: 20px 0; }

/* gap utilities */
.gap-12 { display: flex; gap: 12px; }
.flex-1 { flex: 1; }
.mt-8  { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-20 { margin-top: 20px; }
.mb-16 { margin-bottom: 16px; }

/* 모달 */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,.6);
  display: flex; align-items: center; justify-content: center;
  z-index: 1000;
  animation: fade-in .15s;
}
@keyframes fade-in { from { opacity: 0; } }
.modal {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 24px;
  width: 480px;
  max-width: 94vw;
  box-shadow: var(--shadow);
}
.modal-title { font-size: 16px; font-weight: 700; margin-bottom: 16px; }
.modal-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 20px; }

/* 텍스트 */
.text-dim { color: var(--text-dim); }
.text-sm  { font-size: 13px; }
.text-success { color: var(--success); }
.text-danger  { color: var(--danger); }
.text-info    { color: var(--info); }

/* ── 에이전트 진행 표시 ── */
.agent-thinking {
  padding: 16px 20px;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-left: 3px solid var(--primary);
  border-radius: var(--radius);
}

.thinking-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.thinking-pulse {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--primary);
  flex-shrink: 0;
  animation: pulse-dot 1.2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: .4; transform: scale(.7); }
}

.thinking-label {
  font-size: 13px;
  font-weight: 700;
  color: var(--primary-h);
  letter-spacing: .02em;
}

.thinking-message {
  font-size: 13px;
  color: var(--text-dim);
  line-height: 1.55;
  white-space: pre-wrap;
  word-break: break-word;
  max-height: 4.5em;
  overflow: hidden;
}

/* 반응형 (간소) */
@media (max-width: 900px) {
  :root { --sidebar-w: 56px; }
  .nav-item span, .nav-group-label, .sidebar-logo span { display: none; }
  .nav-item { justify-content: center; padding: 10px; }
  .nav-item .icon { width: auto; }
}