:root {
  color-scheme: light;
  --ink: #18211f;
  --muted: #65726f;
  --line: #d9e1dd;
  --paper: #f7faf8;
  --panel: #ffffff;
  --brand: #0f766e;
  --brand-strong: #115e59;
  --brand-soft: #dff7f1;
  --accent: #f59e0b;
  --danger: #b42318;
  --ok: #16803c;
  --shadow: 0 16px 44px rgba(24, 33, 31, 0.1);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at top left, rgba(15, 118, 110, 0.14), transparent 34rem),
    linear-gradient(180deg, #f2fbf8 0%, var(--paper) 34%);
  color: var(--ink);
  overflow-x: hidden;
}

a {
  color: inherit;
}

.app-shell {
  min-height: 100vh;
  display: grid;
  grid-template-rows: auto 1fr;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px clamp(16px, 4vw, 42px);
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(14px);
  position: sticky;
  top: 0;
  z-index: 10;
  min-width: 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand-mark {
  width: 42px;
  height: 42px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  background: linear-gradient(145deg, var(--brand), #0d9488);
  color: white;
  font-weight: 800;
  letter-spacing: 0;
}

.brand-title {
  margin: 0;
  font-size: 18px;
  line-height: 1.2;
}

.brand-subtitle {
  margin: 2px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: flex-end;
  min-width: 0;
}

.button,
button,
label.file-button {
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--ink);
  border-radius: 7px;
  min-height: 38px;
  padding: 9px 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font: inherit;
  font-size: 14px;
  cursor: pointer;
  text-decoration: none;
}

.button.primary,
button.primary {
  background: var(--brand);
  border-color: var(--brand);
  color: white;
}

.button.warning,
button.warning {
  color: var(--danger);
}

.button:hover,
button:hover,
label.file-button:hover {
  border-color: var(--brand);
}

main {
  width: min(1180px, 100%);
  margin: 0 auto;
  padding: 22px clamp(14px, 3vw, 32px) 32px;
  min-width: 0;
}

.hero-strip {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
  padding: 20px;
  border-radius: 8px;
  background: linear-gradient(135deg, #0f766e, #14b8a6);
  color: white;
  box-shadow: var(--shadow);
}

.hero-strip h1 {
  margin: 0;
  font-size: clamp(26px, 4vw, 42px);
  line-height: 1.05;
}

.hero-strip p {
  margin: 8px 0 0;
  max-width: 680px;
  color: rgba(255, 255, 255, 0.9);
  font-size: 15px;
}

.badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: flex-end;
}

.badge {
  display: inline-flex;
  align-items: center;
  white-space: nowrap;
  border: 1px solid rgba(255, 255, 255, 0.42);
  background: rgba(255, 255, 255, 0.16);
  border-radius: 999px;
  padding: 7px 10px;
  font-size: 13px;
  font-weight: 700;
}

.chat-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 18px;
  min-height: calc(100vh - 110px);
  min-width: 0;
}

.chat-panel,
.side-panel,
.admin-panel,
.modal {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
  min-width: 0;
}

.chat-panel {
  display: grid;
  grid-template-rows: auto auto 1fr auto;
  min-height: 620px;
  overflow: hidden;
}

.chat-heading {
  padding: 18px 18px 14px;
  border-bottom: 1px solid var(--line);
  min-width: 0;
}

.chat-heading h1,
.chat-heading h2,
.admin-heading h1 {
  margin: 0;
  font-size: 22px;
  line-height: 1.2;
}

.chat-heading p,
.admin-heading p {
  color: var(--muted);
  margin: 6px 0 0;
  font-size: 14px;
}

.weather-card {
  margin: 14px 18px 0;
  padding: 12px 13px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  border: 1px solid #bfe5dd;
  border-radius: 8px;
  background: linear-gradient(135deg, #e7fbf5, #f7fffc);
  color: var(--ink);
}

.weather-card strong {
  display: block;
  font-size: 14px;
  line-height: 1.2;
}

.weather-card span {
  display: block;
  margin-top: 3px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.35;
}

.weather-card button {
  flex: 0 0 auto;
  min-height: 34px;
  padding: 7px 10px;
  border-color: #b7ded6;
  color: var(--brand-strong);
  background: white;
  font-size: 12px;
  font-weight: 800;
}

.chat-log {
  padding: 18px;
  overflow: auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.92), rgba(244, 248, 246, 0.95)),
    radial-gradient(circle at top right, rgba(20, 184, 166, 0.15), transparent 18rem);
  min-width: 0;
}

.message {
  max-width: min(760px, 92%);
  border-radius: 8px;
  padding: 13px 14px;
  line-height: 1.5;
  font-size: 15px;
  white-space: pre-wrap;
}

.message.user {
  align-self: flex-end;
  background: linear-gradient(135deg, var(--brand), #0d9488);
  color: white;
}

.message.bot {
  align-self: flex-start;
  background: white;
  border: 1px solid var(--line);
  border-left: 4px solid var(--brand);
}

.message small {
  color: var(--muted);
  display: block;
  margin-top: 8px;
}

.composer {
  border-top: 1px solid var(--line);
  padding: 14px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
  background: white;
  min-width: 0;
}

textarea,
input,
select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 7px;
  padding: 10px 11px;
  font: inherit;
  color: var(--ink);
  background: white;
}

textarea {
  resize: vertical;
  min-height: 46px;
}

.side-panel {
  padding: 16px;
  align-self: start;
  overflow: hidden;
}

.side-panel h2,
.admin-panel h2 {
  margin: 0 0 10px;
  font-size: 16px;
}

.quick-grid,
.category-grid {
  display: grid;
  gap: 8px;
  min-width: 0;
  max-width: 100%;
}

.quick-grid button,
.category-grid button {
  justify-content: flex-start;
  text-align: left;
  min-height: 36px;
}

.quick-grid button {
  border-color: #bfe5dd;
  background: var(--brand-soft);
  font-weight: 700;
}

.quick-grid button:hover {
  background: #cff3eb;
}

.stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin: 16px 0;
}

.stat {
  background: #eef7f5;
  border: 1px solid #cae7e1;
  border-radius: 8px;
  padding: 11px;
}

.stat strong {
  display: block;
  font-size: 20px;
}

.stat span {
  color: var(--muted);
  font-size: 12px;
}

.admin-layout {
  display: grid;
  gap: 16px;
  min-width: 0;
}

.admin-heading,
.admin-panel {
  padding: 18px;
  min-width: 0;
}

.toolbar {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  min-width: 0;
}

.filters {
  display: grid;
  grid-template-columns: 1fr 220px;
  gap: 10px;
  margin-top: 14px;
}

.kb-table {
  width: 100%;
  max-width: 100%;
  border-collapse: collapse;
  margin-top: 12px;
}

.kb-table th,
.kb-table td {
  border-bottom: 1px solid var(--line);
  padding: 11px 8px;
  vertical-align: top;
  text-align: left;
  font-size: 14px;
}

.kb-table th {
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.tag {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 3px 8px;
  background: #fff7e6;
  color: #7c4a03;
  font-size: 12px;
  border: 1px solid #f7d28a;
}

.row-actions {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.form-grid .full {
  grid-column: 1 / -1;
}

.field label {
  display: block;
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 6px;
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(24, 33, 31, 0.42);
  display: none;
  place-items: center;
  padding: 18px;
  z-index: 20;
}

.modal-backdrop.open {
  display: grid;
}

.modal {
  width: min(820px, 100%);
  max-height: 92vh;
  overflow: auto;
  padding: 18px;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.modal-header h2 {
  margin: 0;
}

.hidden {
  display: none !important;
}

.empty {
  color: var(--muted);
  text-align: center;
  padding: 24px;
}

@media (max-width: 860px) {
  .hero-strip {
    align-items: flex-start;
    flex-direction: column;
  }

  .badge-row {
    justify-content: flex-start;
  }

  .chat-layout {
    grid-template-columns: 1fr;
  }

  .side-panel {
    order: -1;
  }

  .filters,
  .form-grid {
    grid-template-columns: 1fr;
  }

  .composer {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .toolbar {
    align-items: stretch;
  }

  .nav-actions {
    width: 100%;
    justify-content: stretch;
  }

  .nav-actions .button,
  .nav-actions button {
    flex: 1;
    min-width: 0;
  }

  .toolbar > .nav-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .toolbar > .nav-actions button,
  .toolbar > .nav-actions label.file-button,
  .toolbar > button {
    width: 100%;
  }

  .admin-panel {
    overflow: hidden;
  }

  .kb-table {
    display: block;
    width: 100%;
    max-width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .stats {
    grid-template-columns: 1fr;
  }
}

@media (min-width: 1025px) {
  main {
    width: min(1220px, 100%);
  }

  .chat-layout {
    grid-template-columns: minmax(0, 1fr) 330px;
  }
}

@media (max-width: 1024px) {
  .chat-layout {
    grid-template-columns: minmax(0, 1fr) 290px;
    gap: 14px;
  }

  .side-panel {
    padding: 14px;
  }
}

@media (max-width: 768px) {
  main {
    padding: 16px 12px 22px;
  }

  .hero-strip {
    padding: 18px;
  }

  .hero-strip h1 {
    font-size: 28px;
  }

  .chat-layout {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .chat-panel {
    min-height: min(72vh, 680px);
  }

  .side-panel {
    order: 2;
    box-shadow: none;
  }

  .quick-grid {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    padding-bottom: 4px;
    -webkit-overflow-scrolling: touch;
  }

  .quick-grid button {
    flex: 0 0 auto;
    min-height: 42px;
    white-space: nowrap;
  }

  .category-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .message {
    max-width: 96%;
    font-size: 15px;
  }

  .composer {
    grid-template-columns: 1fr auto;
    align-items: end;
    position: sticky;
    bottom: 0;
  }

  .composer textarea {
    min-height: 48px;
    max-height: 120px;
    font-size: 16px;
  }

  .composer button {
    min-height: 48px;
    padding-inline: 18px;
    font-weight: 800;
  }
}

@media (max-width: 480px) {
  .topbar {
    padding: 12px;
  }

  .brand-mark {
    width: 38px;
    height: 38px;
  }

  .brand-title {
    font-size: 17px;
  }

  .brand-subtitle {
    font-size: 12px;
  }

  main {
    padding: 12px 10px 18px;
  }

  .hero-strip {
    padding: 16px;
    margin-bottom: 12px;
  }

  .hero-strip h1 {
    font-size: 25px;
  }

  .badge {
    font-size: 12px;
    padding: 6px 9px;
  }

  .chat-heading {
    padding: 15px;
  }

  .chat-log {
    padding: 12px;
    gap: 10px;
  }

  .weather-card {
    margin: 12px;
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
  }

  .weather-card button {
    width: 100%;
  }

  .message {
    border-radius: 10px;
    padding: 11px 12px;
    font-size: 14.5px;
  }

  .composer {
    grid-template-columns: 1fr;
    gap: 8px;
    padding: 11px;
  }

  .composer button {
    width: 100%;
  }

  .category-grid {
    grid-template-columns: 1fr;
  }

  .side-panel {
    padding: 13px;
  }
}