/* ============================================
   BanggaHelper — Admin Dashboard Styles
   Premium dark-mode dashboard design
   ============================================ */

:root {
  --bg-primary: #050a10;
  --bg-secondary: #0a121c;
  --bg-tertiary: #101a26;
  --bg-card: #0a121c;
  --bg-hover: #101a26;
  --bg-input: #050a10;

  --text-primary: #f0f6fc;
  --text-secondary: #c9d1d9;
  --text-muted: #8b949e;
  --text-accent: #5BAEE3;

  --accent: #3EA6F0;
  --accent-light: #5BAEE3;
  --accent-hover: #3590d0;
  --accent-bg: rgba(62, 166, 240, 0.12);

  --success: #34d399;
  --success-bg: rgba(52, 211, 153, 0.12);
  --warning: #fbbf24;
  --warning-bg: rgba(251, 191, 36, 0.12);
  --danger: #f87171;
  --danger-bg: rgba(248, 113, 113, 0.12);

  --border: #2a2f40;
  --border-light: #333849;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.5);

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;

  --sidebar-width: 260px;
  --transition: 0.2s ease;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* ========== LAYOUT ========== */
.app {
  display: flex;
  min-height: 100vh;
}

/* ========== SIDEBAR ========== */
.sidebar {
  width: var(--sidebar-width);
  background: var(--bg-secondary);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 10;
}

.sidebar-header {
  padding: 20px;
  border-bottom: 1px solid var(--border);
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-icon {
  font-size: 28px;
}

.logo h1 {
  font-size: 16px;
  font-weight: 700;
  background: linear-gradient(135deg, var(--accent-light), #a78bfa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.2;
}

.logo-sub {
  font-size: 11px;
  color: var(--text-muted);
  font-weight: 500;
}

.sidebar-nav {
  flex: 1;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition);
  text-align: left;
  width: 100%;
  font-family: inherit;
}

.nav-item:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.nav-item.active {
  background: var(--accent-bg);
  color: var(--accent-light);
}

.nav-icon {
  font-size: 18px;
  width: 24px;
  text-align: center;
}

.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid var(--border);
}

.connection-status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--text-muted);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--danger);
}

.status-dot.online {
  background: var(--success);
  box-shadow: 0 0 6px var(--success);
}

.status-dot.offline {
  background: var(--danger);
}

/* ========== MAIN ========== */
.main {
  flex: 1;
  margin-left: var(--sidebar-width);
  padding: 32px;
  position: relative;
}

/* ========== LOGIN ========== */
.login-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg-primary);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
}

.login-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px;
  width: 100%;
  max-width: 420px;
  box-shadow: var(--shadow-lg);
}

.login-header {
  text-align: center;
  margin-bottom: 28px;
}

.login-icon {
  font-size: 48px;
  display: block;
  margin-bottom: 16px;
}

.login-header h2 {
  font-size: 22px;
  margin-bottom: 8px;
}

.login-header p {
  color: var(--text-secondary);
  font-size: 14px;
}

.login-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.login-error {
  color: var(--danger);
  font-size: 13px;
  text-align: center;
  min-height: 20px;
}

/* ========== PAGES ========== */
.page {
  display: none;
}

.page.active {
  display: block;
}

.page-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 24px;
  flex-wrap: wrap;
  gap: 16px;
}

.page-header h2 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 4px;
}

.page-header p {
  color: var(--text-secondary);
  font-size: 14px;
}

.page-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

/* ========== FORMS ========== */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 16px;
}

.form-group label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.form-hint {
  font-size: 12px;
  color: var(--text-muted);
}

input[type="text"],
input[type="password"],
input[type="url"],
textarea,
select {
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  padding: 10px 14px;
  font-size: 14px;
  font-family: inherit;
  transition: border-color var(--transition);
  width: 100%;
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-bg);
}

textarea {
  resize: vertical;
  min-height: 80px;
}

select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%239aa0b0' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
}

.input-with-action {
  display: flex;
  gap: 8px;
}

.input-with-action input {
  flex: 1;
}

/* ========== BUTTONS ========== */
.btn-primary {
  background: var(--accent);
  color: white;
  border: none;
  border-radius: var(--radius-sm);
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: all var(--transition);
}

.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.btn-secondary {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  transition: all var(--transition);
}

.btn-secondary:hover {
  background: var(--bg-hover);
  border-color: var(--border-light);
}

.btn-danger {
  background: var(--danger-bg);
  color: var(--danger);
  border: 1px solid rgba(248, 113, 113, 0.2);
  border-radius: var(--radius-sm);
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  transition: all var(--transition);
}

.btn-danger:hover {
  background: rgba(248, 113, 113, 0.2);
}

.btn-icon {
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  cursor: pointer;
  font-size: 16px;
  transition: all var(--transition);
}

.btn-icon:hover {
  background: var(--bg-hover);
}

.btn-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 24px;
  cursor: pointer;
  padding: 0;
  line-height: 1;
  transition: color var(--transition);
}

.btn-close:hover {
  color: var(--text-primary);
}

.form-actions {
  display: flex;
  gap: 12px;
  margin-top: 8px;
}

/* ========== SEARCH BAR ========== */
.search-bar {
  display: flex;
  gap: 12px;
  margin-bottom: 20px;
}

.search-bar input {
  flex: 1;
}

.search-bar select {
  width: 160px;
}

/* ========== KNOWLEDGE LIST ========== */
.knowledge-list {
  display: grid;
  gap: 12px;
}

.knowledge-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  cursor: pointer;
  transition: all var(--transition);
}

.knowledge-card:hover {
  border-color: var(--accent);
  background: var(--bg-hover);
  transform: translateX(4px);
}

.knowledge-type-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
}

.knowledge-type-icon.text {
  background: var(--accent-bg);
}

.knowledge-type-icon.image {
  background: var(--success-bg);
}

.knowledge-type-icon.pdf {
  background: var(--warning-bg);
}

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

.knowledge-title {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.knowledge-meta {
  font-size: 12px;
  color: var(--text-muted);
  display: flex;
  gap: 12px;
}

.knowledge-badge {
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 20px;
  font-weight: 600;
  text-transform: uppercase;
}

.knowledge-badge.text {
  background: var(--accent-bg);
  color: var(--accent-light);
}

.knowledge-badge.image {
  background: var(--success-bg);
  color: var(--success);
}

.knowledge-badge.pdf {
  background: var(--warning-bg);
  color: var(--warning);
}

.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
}

.empty-icon {
  font-size: 48px;
  display: block;
  margin-bottom: 16px;
  opacity: 0.5;
}

.empty-state h3 {
  font-size: 18px;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

/* ========== STATS ========== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 20px;
  text-align: center;
}

.stat-icon {
  font-size: 28px;
  margin-bottom: 8px;
}

.stat-value {
  font-size: 28px;
  font-weight: 700;
  color: var(--accent-light);
  margin-bottom: 4px;
}

.stat-label {
  font-size: 13px;
  color: var(--text-muted);
  font-weight: 500;
}

.stats-breakdown {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 20px;
}

/* ========== MODALS ========== */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 560px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
}

.modal-lg {
  max-width: 720px;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
}

.modal-header h3 {
  font-size: 16px;
  font-weight: 600;
}

.modal-body {
  padding: 24px;
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  padding: 16px 24px;
  border-top: 1px solid var(--border);
}

/* ========== FILE DROP ========== */
.file-drop {
  border: 2px dashed var(--border);
  border-radius: var(--radius-md);
  padding: 32px;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-secondary);
}

.file-drop:hover {
  border-color: var(--accent);
  background: var(--accent-bg);
}

.file-drop.dragover {
  border-color: var(--accent);
  background: var(--accent-bg);
}

.drop-icon {
  font-size: 36px;
  opacity: 0.6;
}

.drop-hint {
  font-size: 12px;
  color: var(--text-muted);
}

.file-preview {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border);
}

.file-preview img {
  width: 100%;
  max-height: 200px;
  object-fit: contain;
  background: var(--bg-input);
}

.file-preview-pdf {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: var(--bg-input);
}

.pdf-icon {
  font-size: 24px;
}

.pdf-name {
  flex: 1;
  font-size: 14px;
  color: var(--text-primary);
}

.btn-remove-file {
  position: absolute;
  top: 8px;
  right: 8px;
  background: rgba(0,0,0,0.7);
  color: white;
  border: none;
  border-radius: 50%;
  width: 28px;
  height: 28px;
  font-size: 18px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition);
}

.file-preview-pdf .btn-remove-file {
  position: static;
}

.btn-remove-file:hover {
  background: var(--danger);
}

/* ========== TEST RESULT ========== */
.test-result {
  margin-top: 16px;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: 13px;
}

.test-result.success {
  background: var(--success-bg);
  color: var(--success);
  border: 1px solid rgba(52, 211, 153, 0.2);
}

.test-result.error {
  background: var(--danger-bg);
  color: var(--danger);
  border: 1px solid rgba(248, 113, 113, 0.2);
}

/* ========== TOAST ========== */
.toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 200;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 20px;
  font-size: 14px;
  box-shadow: var(--shadow-lg);
  animation: toastIn 0.3s ease;
  max-width: 360px;
}

.toast.success {
  border-left: 3px solid var(--success);
}

.toast.error {
  border-left: 3px solid var(--danger);
}

.toast.info {
  border-left: 3px solid var(--accent);
}

@keyframes toastIn {
  from { opacity: 0; transform: translateX(20px); }
  to { opacity: 1; transform: translateX(0); }
}

/* ========== LOADING ========== */
.loading {
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ========== RESPONSIVE ========== */
@media (max-width: 768px) {
  .sidebar {
    width: 60px;
    overflow: hidden;
  }

  .sidebar-header, .sidebar-footer { display: none; }

  .nav-item span:not(.nav-icon) { display: none; }
  .nav-item { justify-content: center; padding: 12px; }
  .nav-icon { margin: 0; }

  .main {
    margin-left: 60px;
    padding: 16px;
  }

  .page-header {
    flex-direction: column;
  }

  .search-bar {
    flex-direction: column;
  }

  .search-bar select {
    width: 100%;
  }
}

/* ========== RAG TESTING PLAYGROUND ========== */
.rag-test-container {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 24px;
  max-width: 800px;
}

.rag-chunks-grid {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.rag-chunk-card {
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px;
  transition: all var(--transition);
}

.rag-chunk-card:hover {
  border-color: var(--accent);
}

.rag-chunk-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}

.rag-chunk-rank {
  font-weight: 700;
  color: var(--accent-light);
  font-size: 13px;
}

.rag-chunk-title {
  font-weight: 600;
  font-size: 13px;
  flex: 1;
  color: var(--text-primary);
}

.rag-score-badge {
  background: var(--accent-bg);
  color: var(--accent-light);
  font-size: 11px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 12px;
}

.rag-chunk-content {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.5;
  white-space: pre-wrap;
}

.rag-chunk-footer {
  margin-top: 8px;
  font-size: 11px;
  color: var(--text-muted);
}

.rag-assembled-context {
  background: #030712;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px;
  font-family: 'Fira Code', Consolas, Monaco, monospace;
  font-size: 12px;
  color: #cbd5e1;
  white-space: pre-wrap;
  max-height: 250px;
  overflow-y: auto;
}

/* ========== UNANSWERED & FEEDBACK LOGS ========== */
.unanswered-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 800px;
}

.unanswered-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px;
}

.unanswered-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.unanswered-date {
  font-size: 11px;
  color: var(--text-muted);
}

.unanswered-content {
  font-size: 14px;
  color: var(--text-primary);
  line-height: 1.5;
  font-weight: 500;
}

.unanswered-comment {
  margin-top: 8px;
  padding: 8px 12px;
  background: rgba(239, 68, 68, 0.08);
  border-left: 3px solid var(--danger);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 12px;
  color: #fca5a5;
  font-style: italic;
}

.badge-feedback {
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 12px;
  font-weight: 600;
  display: inline-block;
  margin-right: 6px;
}

.badge-feedback.negative {
  background: var(--danger-bg);
  color: var(--danger);
}

.badge-feedback.warning {
  background: var(--warning-bg);
  color: var(--warning);
}

.url-badge {
  background: rgba(99, 102, 241, 0.15);
  color: var(--accent-light);
  font-size: 11px;
  padding: 2px 6px;
  border-radius: 4px;
  font-family: monospace;
}