/* ================================================================
   ClientGrid — Premium Dark Theme
   ================================================================ */

/* ── Reset & Variables ─────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg-base:         #090914;
  --bg-surface:      #0e0e1c;
  --bg-card:         rgba(255,255,255,0.032);
  --bg-card-hover:   rgba(255,255,255,0.058);
  --bg-modal:        #111128;
  --bg-input:        rgba(255,255,255,0.05);
  --bg-input-focus:  rgba(255,255,255,0.08);

  --border:          rgba(255,255,255,0.08);
  --border-hover:    rgba(255,255,255,0.16);

  --text-primary:    #ededf8;
  --text-secondary:  #9090b8;
  --text-muted:      #55557a;

  --purple:          #8b5cf6;
  --purple-glow:     rgba(139,92,246,0.35);
  --cyan:            #06b6d4;
  --cyan-glow:       rgba(6,182,212,0.35);
  --green:           #10b981;
  --red:             #ef4444;
  --amber:           #f59e0b;

  --radius-sm:  8px;
  --radius-md:  12px;
  --radius-lg:  16px;
  --radius-xl:  24px;

  --shadow-card:  0 4px 32px rgba(0,0,0,0.5);
  --shadow-modal: 0 24px 80px rgba(0,0,0,0.7);

  --ease:       cubic-bezier(0.4, 0, 0.2, 1);
  --transition: 0.2s cubic-bezier(0.4,0,0.2,1);
  --font:       'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg-base);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ── Scrollbar ──────────────────────────────────────────────────── */
::-webkit-scrollbar       { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.12); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.22); }

/* ── Animations ─────────────────────────────────────────────────── */
@keyframes spin         { to { transform: rotate(360deg); } }
@keyframes fadeIn       { from { opacity: 0; } to { opacity: 1; } }
@keyframes slideUp      { from { opacity:0; transform:translateY(18px) scale(.98); } to { opacity:1; transform:translateY(0) scale(1); } }
@keyframes fadeSlideIn  { from { opacity:0; transform:translateY(10px); } to { opacity:1; transform:translateY(0); } }
@keyframes toastIn      { from { opacity:0; transform:translateX(16px); } to { opacity:1; transform:translateX(0); } }
@keyframes toastOut     { from { opacity:1; transform:translateX(0); }   to { opacity:0; transform:translateX(16px); } }
@keyframes pulse        { 0%,100%{opacity:.5} 50%{opacity:1} }

/* ================================================================
   LAYOUT
   ================================================================ */

#app { min-height: 100vh; }

.full-center {
  display: flex; align-items: center; justify-content: center;
  min-height: 100vh; gap: 12px;
  color: var(--text-secondary); font-size: 14px;
}

.page-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 36px;
  border-bottom: 1px solid var(--border);
  background: rgba(9,9,20,0.85);
  backdrop-filter: blur(14px);
  position: sticky; top: 0; z-index: 100;
}

.logo {
  display: flex; align-items: center; gap: 10px;
}
.logo-icon {
  width: 34px; height: 34px;
  background: linear-gradient(135deg, #7c3aed, #06b6d4);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-size: 17px;
}
.logo-text {
  font-size: 19px; font-weight: 700; letter-spacing: -.5px;
  background: linear-gradient(135deg, #ddd8ff, #93e6fb);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}

.page-content {
  max-width: 1180px;
  margin: 0 auto;
  padding: 40px 36px;
}

/* ================================================================
   HOME PAGE
   ================================================================ */

.home-hero {
  text-align: center;
  padding: 16px 0 56px;
}
.home-hero h1 {
  font-size: 58px; font-weight: 800; letter-spacing: -3px; line-height: 1.08;
  background: linear-gradient(150deg, #ffffff 20%, #c4b5fd 55%, #67e8f9 90%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 14px;
}
.home-hero p {
  font-size: 15px; color: var(--text-secondary); max-width: 440px; margin: 0 auto;
}

.agents-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 20px;
}

/* Agent Card */
.agent-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 30px 28px 26px;
  cursor: pointer;
  transition: transform var(--transition), background var(--transition), border-color var(--transition), box-shadow var(--transition);
  position: relative; overflow: hidden;
}
.agent-card::after {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: var(--card-gradient);
  opacity: 0; transition: opacity var(--transition);
}
.agent-card:hover {
  transform: translateY(-5px);
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-card);
}
.agent-card:hover::after { opacity: 1; }

.card-icon {
  width: 52px; height: 52px;
  border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  font-size: 26px; margin-bottom: 18px;
}
.card-name {
  font-size: 22px; font-weight: 700; letter-spacing: -.4px; margin-bottom: 3px;
}
.card-subtitle {
  font-size: 12px; font-weight: 600;
  text-transform: uppercase; letter-spacing: 1px;
  margin-bottom: 14px;
}
.card-desc {
  font-size: 13.5px; color: var(--text-secondary); line-height: 1.7;
  margin-bottom: 22px;
}
.card-footer {
  display: flex; align-items: center; justify-content: space-between;
}
.card-tag {
  font-size: 12px; color: var(--text-muted);
  display: flex; align-items: center; gap: 5px;
}
.card-arrow {
  font-size: 17px; opacity: .35;
  transition: opacity var(--transition), transform var(--transition);
}
.agent-card:hover .card-arrow { opacity: 1; transform: translateX(4px); }

/* ================================================================
   AGENT PAGE
   ================================================================ */

.back-btn {
  display: inline-flex; align-items: center; gap: 7px;
  background: none; border: none; color: var(--text-secondary);
  font: 13px/1 var(--font); cursor: pointer;
  padding: 8px 0; margin-bottom: 26px;
  transition: color var(--transition);
}
.back-btn:hover { color: var(--text-primary); }

.agent-page-hero {
  display: flex; align-items: center; gap: 18px;
  margin-bottom: 38px;
}
.agent-page-icon {
  width: 62px; height: 62px;
  border-radius: var(--radius-lg);
  display: flex; align-items: center; justify-content: center;
  font-size: 30px; flex-shrink: 0;
}
.agent-page-hero h2 {
  font-size: 30px; font-weight: 700; letter-spacing: -.8px; margin-bottom: 3px;
}
.agent-page-hero p { font-size: 13px; color: var(--text-secondary); }

/* ── Tabs ────────────────────────────────────────────────────────── */
.tabs-nav {
  display: flex; gap: 3px;
  background: rgba(255,255,255,0.025);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 4px; width: fit-content;
  margin-bottom: 30px;
}
.tab-btn {
  background: none; border: none;
  color: var(--text-secondary);
  padding: 9px 22px;
  border-radius: var(--radius-sm);
  font: 500 13.5px var(--font); cursor: pointer;
  transition: all var(--transition); white-space: nowrap;
}
.tab-btn:hover { color: var(--text-primary); background: rgba(255,255,255,0.038); }
.tab-btn.active { background: rgba(255,255,255,0.08); color: var(--text-primary); }

.tab-panel { display: none; animation: fadeSlideIn .22s ease; }
.tab-panel.active { display: block; }

/* ================================================================
   KNOWLEDGE BASE TAB
   ================================================================ */

.upload-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius-lg);
  padding: 44px 28px;
  text-align: center;
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition);
  margin-bottom: 28px;
  position: relative;
}
.upload-zone:hover,
.upload-zone.drag-over {
  border-color: rgba(255,255,255,0.25);
  background: rgba(255,255,255,0.015);
}
.upload-zone-input {
  position: absolute; inset: 0;
  opacity: 0; cursor: pointer; width: 100%; height: 100%;
}
.upload-emoji { font-size: 38px; margin-bottom: 10px; opacity: .45; }
.upload-title { font-size: 15px; font-weight: 600; margin-bottom: 5px; }
.upload-hint { font-size: 13px; color: var(--text-secondary); }
.upload-hint span {
  background: linear-gradient(90deg, #a78bfa, #67e8f9);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text; font-weight: 500;
}
.upload-progress-row {
  display: none; align-items: center; justify-content: center; gap: 10px;
  margin-top: 14px; font-size: 13px; color: var(--text-secondary);
}
.upload-progress-row.active { display: flex; }

.kb-count {
  font-size: 13px; color: var(--text-secondary); margin-bottom: 14px;
}

.docs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
  gap: 14px;
}

.doc-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 18px 14px 14px;
  transition: border-color var(--transition), background var(--transition);
}
.doc-card:hover { border-color: var(--border-hover); background: var(--bg-card-hover); }

.doc-emoji { font-size: 32px; display: block; margin-bottom: 10px; }
.doc-name {
  font-size: 12.5px; font-weight: 500;
  word-break: break-word; margin-bottom: 4px; line-height: 1.45;
}
.doc-date { font-size: 11px; color: var(--text-muted); margin-bottom: 11px; }

.doc-delete-btn {
  display: flex; align-items: center; justify-content: center; gap: 5px;
  width: 100%; padding: 6px 0;
  background: rgba(239,68,68,.08);
  border: 1px solid rgba(239,68,68,.18);
  border-radius: var(--radius-sm);
  color: #f87171; font: 12px var(--font); cursor: pointer;
  transition: background var(--transition), border-color var(--transition);
}
.doc-delete-btn:hover { background: rgba(239,68,68,.18); border-color: rgba(239,68,68,.35); }

.empty-state {
  text-align: center; padding: 56px 20px;
  color: var(--text-muted); font-size: 14px;
}
.empty-emoji { font-size: 44px; opacity: .25; margin-bottom: 10px; }
.empty-sub { font-size: 12px; margin-top: 5px; opacity: .6; }

/* ================================================================
   PROMPT TAB
   ================================================================ */

.prompt-wrap { max-width: 780px; }
.prompt-header { margin-bottom: 26px; }
.prompt-header h3 { font-size: 17px; font-weight: 600; margin-bottom: 5px; }
.prompt-header p  { font-size: 13.5px; color: var(--text-secondary); }

.form-group { margin-bottom: 22px; }
.form-label {
  display: block; font-size: 11.5px; font-weight: 600;
  color: var(--text-secondary); text-transform: uppercase;
  letter-spacing: .8px; margin-bottom: 9px;
}
.form-textarea {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 13px 15px;
  color: var(--text-primary);
  font: 14px/1.72 var(--font);
  resize: vertical; min-height: 130px;
  outline: none; transition: border-color var(--transition), background var(--transition);
}
.form-textarea::placeholder { color: var(--text-muted); }
.form-textarea:focus { border-color: var(--border-hover); background: var(--bg-input-focus); }

.form-input {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 13px;
  color: var(--text-primary);
  font: 13.5px var(--font);
  outline: none; transition: border-color var(--transition), background var(--transition);
}
.form-input::placeholder { color: var(--text-muted); }
.form-input:focus { border-color: var(--border-hover); background: var(--bg-input-focus); }

.form-actions { display: flex; align-items: center; gap: 12px; }
.saved-indicator {
  font-size: 13px; color: var(--green);
  display: none; animation: fadeIn .3s ease;
}

/* ================================================================
   TABLES TAB
   ================================================================ */

.sub-tabs-nav {
  display: flex; gap: 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: 22px;
}
.sub-tab-btn {
  background: none; border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-secondary);
  padding: 9px 22px; margin-bottom: -1px;
  font: 500 13.5px var(--font); cursor: pointer;
  transition: color var(--transition), border-color var(--transition);
}
.sub-tab-btn:hover { color: var(--text-primary); }
.sub-tab-btn.active { color: var(--text-primary); border-bottom-color: var(--accent, var(--purple)); }

.sub-tab-panel { display: none; }
.sub-tab-panel.active { display: block; }

.table-toolbar {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 14px;
}
.table-toolbar-title {
  font-size: 14.5px; font-weight: 600;
  display: flex; align-items: center; gap: 8px;
}
.table-name-tag {
  font-size: 11px; color: var(--text-muted);
  font-weight: 400; padding: 2px 8px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  border-radius: 99px;
}

.table-wrapper {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: auto;
}
.data-table {
  width: 100%; border-collapse: collapse; font-size: 13px;
}
.data-table th {
  background: rgba(255,255,255,.028);
  padding: 11px 16px;
  text-align: left;
  font-size: 10.5px; font-weight: 600;
  color: var(--text-secondary); text-transform: uppercase; letter-spacing: .8px;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
.data-table td {
  padding: 11px 16px;
  border-bottom: 1px solid rgba(255,255,255,.04);
  vertical-align: middle;
  max-width: 280px;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.data-table tr:last-child td { border-bottom: none; }
.data-table tr:hover td { background: rgba(255,255,255,.018); }
.data-table td.actions-cell { white-space: nowrap; text-align: right; }

.table-empty {
  text-align: center; padding: 38px 20px;
  color: var(--text-muted); font-size: 13.5px;
}

.row-actions { display: flex; gap: 4px; justify-content: flex-end; }

/* ================================================================
   BUTTONS
   ================================================================ */

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 7px;
  padding: 9px 18px;
  border-radius: var(--radius-sm);
  font: 500 13.5px var(--font);
  cursor: pointer; border: 1px solid transparent;
  transition: all var(--transition); white-space: nowrap; line-height: 1;
}
.btn:disabled { opacity: .45; cursor: not-allowed; pointer-events: none; }

.btn-primary {
  background: linear-gradient(135deg,#7c3aed,#8b5cf6);
  color: #fff;
}
.btn-primary:hover {
  background: linear-gradient(135deg,#6d28d9,#7c3aed);
  transform: translateY(-1px);
  box-shadow: 0 4px 18px var(--purple-glow);
}

.btn-secondary {
  background: rgba(255,255,255,.06);
  color: var(--text-primary);
  border-color: var(--border);
}
.btn-secondary:hover { background: rgba(255,255,255,.10); border-color: var(--border-hover); }

.btn-ghost {
  background: none; color: var(--text-secondary);
}
.btn-ghost:hover { color: var(--text-primary); background: rgba(255,255,255,.05); }

.btn-danger {
  background: rgba(239,68,68,.1);
  color: #f87171;
  border-color: rgba(239,68,68,.22);
}
.btn-danger:hover { background: rgba(239,68,68,.2); border-color: rgba(239,68,68,.4); }

.btn-sm { padding: 6px 13px; font-size: 12.5px; }

.icon-btn {
  background: none; border: none; cursor: pointer;
  color: var(--text-secondary); font-size: 15px;
  padding: 5px 7px; border-radius: 6px;
  transition: all var(--transition);
  display: inline-flex; align-items: center;
}
.icon-btn:hover { background: rgba(255,255,255,.07); color: var(--text-primary); }
.icon-btn.icon-danger:hover { background: rgba(239,68,68,.1); color: #f87171; }

/* ================================================================
   MODAL
   ================================================================ */

#modal-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,.72);
  backdrop-filter: blur(5px);
  z-index: 1000;
  display: flex; align-items: center; justify-content: center;
  padding: 20px;
  animation: fadeIn .18s ease;
}
#modal-overlay.hidden { display: none; }

.modal {
  background: var(--bg-modal);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  width: 100%; max-width: 510px;
  box-shadow: var(--shadow-modal);
  animation: slideUp .24s var(--ease);
  display: flex; flex-direction: column;
}
.modal.modal-lg { max-width: 850px; height: 90vh; }
.modal-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 22px 26px 0;
}
.modal-header h3 { font-size: 17px; font-weight: 600; }
.modal-close-btn {
  background: none; border: none; color: var(--text-secondary);
  font: 18px var(--font); cursor: pointer;
  padding: 3px 7px; border-radius: 6px;
  transition: all var(--transition);
}
.modal-close-btn:hover { background: rgba(255,255,255,.06); color: var(--text-primary); }

.modal-body { padding: 20px 26px; flex: 1; display: flex; flex-direction: column; }
.modal-body.flush { padding: 0; }
.modal-footer {
  display: flex; gap: 9px; justify-content: flex-end;
  padding: 0 26px 22px;
}

/* Delete Confirm Dialog */
.confirm-msg { font-size: 14.5px; color: var(--text-secondary); line-height: 1.7; }
.confirm-warn {
  margin-top: 12px; padding: 11px 14px;
  background: rgba(239,68,68,.07);
  border: 1px solid rgba(239,68,68,.2);
  border-radius: var(--radius-sm);
  font-size: 12.5px; color: #fca5a5;
}

/* ================================================================
   TOAST NOTIFICATIONS
   ================================================================ */

#toast-container {
  position: fixed; top: 18px; right: 18px;
  z-index: 2000;
  display: flex; flex-direction: column; gap: 7px;
}
.toast {
  display: flex; align-items: flex-start; gap: 11px;
  background: #181830;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 13px 15px; min-width: 270px; max-width: 380px;
  box-shadow: 0 8px 36px rgba(0,0,0,.45);
  animation: toastIn .28s var(--ease); cursor: pointer;
}
.toast.leaving { animation: toastOut .22s ease forwards; }
.toast.success { border-left: 3px solid var(--green); }
.toast.error   { border-left: 3px solid var(--red); }
.toast.warning { border-left: 3px solid var(--amber); }
.toast.info    { border-left: 3px solid var(--purple); }

.toast-icon { font-size: 17px; flex-shrink: 0; margin-top: 1px; }
.toast-title { font-size: 13.5px; font-weight: 600; margin-bottom: 2px; }
.toast-msg   { font-size: 12px; color: var(--text-secondary); }

/* ================================================================
   UTILITIES
   ================================================================ */

.hidden { display: none !important; }

.spinner {
  width: 18px; height: 18px;
  border: 2px solid rgba(255,255,255,.14);
  border-top-color: var(--purple);
  border-radius: 50%;
  animation: spin .75s linear infinite;
  flex-shrink: 0;
}
.spinner.lg { width: 26px; height: 26px; border-width: 3px; }

.loading-row {
  display: flex; align-items: center; justify-content: center;
  gap: 10px; padding: 36px;
  color: var(--text-secondary); font-size: 13.5px;
}

.badge {
  display: inline-flex; align-items: center;
  padding: 3px 10px; border-radius: 99px;
  font-size: 11px; font-weight: 600;
  text-transform: uppercase; letter-spacing: .5px;
}
.badge-purple { background: rgba(139,92,246,.13); color: #c4b5fd; border: 1px solid rgba(139,92,246,.24); }
.badge-cyan   { background: rgba(6,182,212,.13);  color: #67e8f9; border: 1px solid rgba(6,182,212,.24); }

/* ================================================================
   RESPONSIVE
   ================================================================ */

@media (max-width: 720px) {
  .page-header   { padding: 15px 18px; }
  .page-content  { padding: 24px 18px; }
  .home-hero h1  { font-size: 38px; }
  .agents-grid   { grid-template-columns: 1fr; }
  .tabs-nav      { flex-wrap: wrap; width: 100%; }
  .tab-btn       { flex: 1; text-align: center; padding: 9px 10px; }
  .docs-grid     { grid-template-columns: repeat(auto-fill, minmax(148px, 1fr)); }
}