/* Canvas Ecoa — shared design tokens and components.
   Brand colors sampled from the unmodified official PNG (8001 × 4501):
   Ecoa cyan #06b5db, Ecoa yellow #fdb808, PUC lettering #749496.
   Cyan uses dark foregrounds; it is not accessible as small text on white. */
:root {
  color-scheme: light;
  --brand-ecoa-cyan: #06b5db;
  --brand-ecoa-yellow: #fdb808;
  --brand-puc-gray: #749496;
  --color-primary: var(--brand-ecoa-cyan);
  --color-accent: var(--brand-ecoa-yellow);
  --color-bg: #ffffff;
  --color-bg-subtle: #f8fafc;
  --color-surface: #ffffff;
  --color-surface-muted: #f1f5f9;
  --color-text: #0f172a;
  --color-text-secondary: #475569;
  --color-text-muted: #64748b;
  --color-border: #e2e8f0;
  --color-border-strong: #cbd5e1;
  --color-control-border: #64748b;
  --color-success: #15803d;
  --color-success-bg: #dcfce7;
  --color-warning: #92400e;
  --color-warning-bg: #fef3c7;
  --color-danger: #b91c1c;
  --color-danger-bg: #fee2e2;
  --color-info: var(--color-primary);
  --color-info-bg: #eff6ff;
  --color-on-primary: var(--color-text);
  --color-link: var(--color-text);
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --header-height: 72px;
  --sidebar-width: 216px;
  --content-max-width: 1440px;
  --control-height-sm: 32px;
  --control-height-md: 40px;
  --control-height-lg: 44px;
  --font-sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: ui-monospace, "SFMono-Regular", Consolas, monospace;
  --font-size-caption: 12px;
  --font-size-label: 13px;
  --font-size-body: 14px;
  --font-size-section: 18px;
  --font-size-app: 20px;
  --font-size-title: 28px;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--color-bg-subtle); color: var(--color-text); font: 400 var(--font-size-body)/1.5 var(--font-sans); }
h1, h2, h3, p { margin: 0; }
h1, .page-title { font-size: var(--font-size-title); line-height: 1.2; font-weight: 700; overflow-wrap: anywhere; }
h2, h3, .section-title { font-size: var(--font-size-section); line-height: 1.3; font-weight: 600; }
a { color: var(--color-link); text-decoration-thickness: 1px; text-underline-offset: 4px; }
a:hover { text-decoration-thickness: 2px; }
button, input, select, textarea { font: inherit; }
form { margin: 0; }
button, a, input, textarea, select, summary { -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 2px solid var(--color-text); outline-offset: 3px; box-shadow: 0 0 0 2px var(--color-primary); }
.muted, .help-text { color: var(--color-text-secondary); }
.small, .caption, .help-text { font-size: var(--font-size-caption); line-height: 1.4; }
.sr-only, .skip-link:not(:focus) { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; border: 0; }
.skip-link:focus { position: absolute; top: var(--space-2); left: var(--space-2); padding: var(--space-3); background: var(--color-surface); z-index: 10; }

/* Application shell — one shared header and navigation, no client-side dependency. */
.app-header { min-height: var(--header-height); display: flex; align-items: center; gap: var(--space-5); padding: var(--space-1) var(--space-5); background: var(--color-surface); border-bottom: 1px solid var(--color-border); }
.brand { display: inline-flex; align-items: center; gap: var(--space-4); color: var(--color-text); text-decoration: none; }
.brand:hover { text-decoration: none; }
.brand-logo { display: block; width: auto; height: auto; max-width: 100%; object-fit: contain; }
.brand .brand-logo { width: 112px; flex: 0 0 auto; }
.brand-text { border-left: 1px solid var(--color-border-strong); padding-left: var(--space-4); }
.app-title { display: block; font-size: var(--font-size-app); line-height: 1.25; font-weight: 700; white-space: nowrap; }
.app-subtitle { display: block; font-size: var(--font-size-caption); color: var(--color-text-secondary); margin-top: var(--space-1); }
.account { margin-left: auto; display: flex; align-items: center; gap: var(--space-4); min-width: 0; }
.account-name { max-width: 20ch; overflow-wrap: anywhere; font-size: var(--font-size-label); color: var(--color-text-secondary); }
.app-shell { min-height: calc(100vh - var(--header-height)); display: grid; grid-template-columns: var(--sidebar-width) minmax(0, 1fr); }
.app-sidebar { width: var(--sidebar-width); background: var(--color-surface); border-right: 1px solid var(--color-border); padding: var(--space-5) var(--space-4); }
.navigation-label { font-size: var(--font-size-caption); color: var(--color-text-secondary); padding: 0 var(--space-3); margin-bottom: var(--space-3); }
.admin-nav { display: grid; gap: var(--space-2); }
.admin-nav a { display: flex; align-items: center; min-height: var(--control-height-lg); padding: var(--space-2) var(--space-3); border-left: 3px solid transparent; border-radius: var(--radius-sm); color: var(--color-text-secondary); text-decoration: none; }
.admin-nav a:hover { background: var(--color-bg-subtle); }
.admin-nav a[aria-current="page"] { border-color: var(--color-primary); background: var(--color-info-bg); color: var(--color-text); font-weight: 600; }
.app-workspace { min-width: 0; display: flex; flex-direction: column; }
.page-container { width: 100%; max-width: var(--content-max-width); padding: var(--space-5); margin-inline: auto; flex: 1; }
.page-header { display: flex; align-items: flex-start; justify-content: space-between; gap: var(--space-4); margin-bottom: var(--space-5); }
.page-header p { color: var(--color-text-secondary); margin-top: var(--space-2); max-width: 80ch; }
.breadcrumb { margin-bottom: var(--space-4); color: var(--color-text-secondary); font-size: var(--font-size-caption); }
.breadcrumb ol { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-2); list-style: none; margin: 0; padding: 0; }
.breadcrumb li + li::before { content: "/"; padding-right: var(--space-2); color: var(--color-text-muted); }
.breadcrumb a { display: inline-flex; align-items: center; min-height: var(--control-height-sm); }
.app-footer { padding: var(--space-5); font-size: var(--font-size-caption); color: var(--color-text-secondary); }
.app-footer span { padding: 0 var(--space-2); }

/* Shared surfaces, headings, feedback and status. */
.panel, .form-section { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-md); }
.panel + .panel, .form-section + .form-section { margin-top: var(--space-5); }
.panel-toolbar { padding: var(--space-4) var(--space-5); display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: var(--space-4); }
.panel-toolbar p { margin-top: var(--space-1); }
.panel-footer { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: var(--space-4); padding: var(--space-4) var(--space-5); border-top: 1px solid var(--color-border); }
.summary { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: var(--space-4); margin-bottom: var(--space-5); }
.metric-card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: var(--space-4); }
.metric-card span { color: var(--color-text-secondary); font-size: var(--font-size-caption); }
.metric-card strong { display: block; font-size: var(--font-size-title); font-weight: 600; line-height: 1.2; margin-top: var(--space-2); font-variant-numeric: tabular-nums; }
.badge { display: inline-flex; align-items: center; min-height: var(--space-5); padding: var(--space-1) var(--space-2); border-radius: 999px; font-size: var(--font-size-caption); line-height: 1.4; font-weight: 500; white-space: nowrap; }
.badge-neutral { color: var(--color-text-secondary); background: var(--color-surface-muted); }
.badge-success { color: var(--color-success); background: var(--color-success-bg); }
.badge-warning { color: var(--color-warning); background: var(--color-warning-bg); }
.badge-danger { color: var(--color-danger); background: var(--color-danger-bg); }
.alert { border: 1px solid var(--color-border-strong); border-left: 4px solid var(--color-info); border-radius: var(--radius-md); padding: var(--space-4); margin-bottom: var(--space-5); color: var(--color-text); background: var(--color-info-bg); }
.alert-success { border-left-color: var(--color-success); color: var(--color-success); background: var(--color-success-bg); }
.alert-warning { border-left-color: var(--color-warning); color: var(--color-warning); background: var(--color-warning-bg); }
.alert-error { border-left-color: var(--color-danger); color: var(--color-danger); background: var(--color-danger-bg); }
.empty-state { padding: var(--space-7) var(--space-5); text-align: center; }
.empty-state p { margin: var(--space-2) auto 0; max-width: 60ch; color: var(--color-text-secondary); }

/* Buttons and links share sizes and accessible foregrounds. */
.button { display: inline-flex; justify-content: center; align-items: center; gap: var(--space-2); min-height: var(--control-height-md); border: 1px solid var(--color-control-border); border-radius: var(--radius-md); padding: var(--space-2) var(--space-4); font-size: var(--font-size-body); font-weight: 600; line-height: 1.4; text-align: center; text-decoration: none; cursor: pointer; }
.button:hover { text-decoration: none; box-shadow: inset 0 0 0 1px currentColor; }
.button-primary { background: var(--color-primary); color: var(--color-on-primary); border-color: var(--color-text); }
.button-secondary { background: var(--color-surface); color: var(--color-text); }
.button-danger { background: var(--color-danger); border-color: var(--color-danger); color: var(--color-surface); }
.button-ghost { background: transparent; color: var(--color-text); border-color: transparent; }
.text-action { display: inline-flex; align-items: center; min-height: var(--control-height-md); padding: var(--space-2) var(--space-1); font-size: var(--font-size-label); }
.danger-link { color: var(--color-danger); }
.row-actions { display: flex; flex-wrap: wrap; min-width: 144px; max-width: 192px; margin-left: auto; justify-content: flex-end; align-items: center; gap: var(--space-2); }
.row-actions .button { font-size: var(--font-size-caption); padding-inline: var(--space-3); }
.row-actions a { white-space: nowrap; }
.form-actions, .detail-actions { display: flex; align-items: center; flex-wrap: wrap; gap: var(--space-3); }
.form-actions { justify-content: flex-end; margin-top: var(--space-5); }
.detail-actions .danger-link { margin-left: auto; }

/* Forms and toolbars. Native validation keeps values and works without JavaScript. */
.form-grid { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); gap: var(--space-4); }
.field { display: grid; gap: var(--space-2); min-width: 0; align-content: start; }
.col-3 { grid-column: span 3; }
.col-4 { grid-column: span 4; }
.col-6 { grid-column: span 6; }
.col-12 { grid-column: span 12; }
label, legend { font-size: var(--font-size-label); line-height: 1.4; font-weight: 500; }
.form-control { display: block; min-height: var(--control-height-md); width: 100%; min-width: 0; padding: var(--space-2) var(--space-3); border: 1px solid var(--color-control-border); border-radius: var(--radius-md); background: var(--color-surface); color: var(--color-text); }
.form-control::placeholder { color: var(--color-text-secondary); opacity: 1; }
.form-control:user-invalid { border-color: var(--color-danger); outline: 1px solid var(--color-danger); }
textarea.form-control { resize: vertical; }
.form-section { padding: var(--space-5); }
.form-section > h2 { margin-bottom: var(--space-2); }
.form-section > .form-grid { margin-top: var(--space-5); }
.check-label { display: flex; align-items: flex-start; gap: var(--space-3); min-height: var(--control-height-lg); padding-block: var(--space-3); }
.check-label input { width: 20px; height: 20px; margin: 0; flex-shrink: 0; accent-color: var(--color-text); }
.search-form { display: flex; align-items: flex-end; gap: var(--space-2); flex: 1; }
.search-form .field { flex: 1; }
.toolbar { padding: var(--space-5); border-bottom: 1px solid var(--color-border); }
.filter-panel { padding: var(--space-5); margin-bottom: var(--space-5); }
.history-filters { margin-top: var(--space-4); align-items: end; }
.filter-range { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-2); border: 0; padding: 0; margin: 0; min-width: 0; }
.filter-range legend { padding: 0 0 var(--space-2); }
.filter-range label { font-size: var(--font-size-caption); color: var(--color-text-secondary); }
.filter-actions { display: flex; align-items: center; gap: var(--space-4); }
.toolbar > .help-text { margin-top: var(--space-2); }
.filter-help { margin-top: var(--space-4); max-width: 110ch; }
.detail-panel { padding: var(--space-5); margin-bottom: var(--space-5); }
.detail-panel h2 { margin-bottom: var(--space-2); }
.detail-grid { display: grid; grid-template-columns: minmax(144px, 1fr) minmax(0, 3fr); gap: var(--space-3) var(--space-5); margin: var(--space-5) 0 0; }
.detail-grid dt { color: var(--color-text-secondary); font-size: var(--font-size-label); }
.detail-grid dd { margin: 0; overflow-wrap: anywhere; }
.danger-section { border-left: 3px solid var(--color-danger); }

/* Tables remain semantic; only the labelled region scrolls on narrow screens. */
.table-hint { display: none; padding: 0 var(--space-4) var(--space-3); }
.table-scroll { position: relative; width: 100%; overflow-x: auto; border-radius: var(--radius-md); }
.data-table { width: 100%; min-width: 960px; border-collapse: separate; border-spacing: 0; text-align: left; }
.data-table th { height: var(--control-height-lg); background: var(--color-bg-subtle); color: var(--color-text-secondary); font-size: var(--font-size-caption); font-weight: 600; white-space: nowrap; }
.data-table td { height: 52px; font-size: var(--font-size-body); }
.data-table th, .data-table td { padding: var(--space-3) var(--space-4); border-bottom: 1px solid var(--color-border); vertical-align: middle; }
.data-table th small { display: block; font-size: var(--font-size-caption); font-weight: 400; }
.data-table tbody tr:last-child td { border-bottom: 0; }
.data-table tbody tr:hover { background: var(--color-bg-subtle); }
.person-name { display: block; font-weight: 600; min-width: 140px; max-width: 28ch; overflow-wrap: anywhere; }
.secondary-value { display: block; font-size: var(--font-size-caption); color: var(--color-text-secondary); margin-top: var(--space-1); overflow-wrap: anywhere; }
.telegram-id { font-family: var(--font-mono); }
.date { white-space: nowrap; font-variant-numeric: tabular-nums; color: var(--color-text-secondary); }
.data-table td.date { font-size: var(--font-size-caption); }
.actions-heading { text-align: right; }
.description-cell { min-width: 160px; max-width: 48ch; overflow-wrap: anywhere; white-space: pre-wrap; }
.contact-cell { min-width: 192px; overflow-wrap: anywhere; }
.contact-cell span { display: block; }
.canvas-table { min-width: 720px; }
.daily-table { min-width: 560px; }
.pagination { display: flex; align-items: center; flex-wrap: wrap; gap: var(--space-4); font-size: var(--font-size-label); }
.pagination a { display: inline-flex; align-items: center; min-height: var(--control-height-md); }

/* Administrative conversation record. */
.conversation-info { padding: var(--space-4); margin-bottom: var(--space-5); background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-md); display: flex; flex-wrap: wrap; gap: var(--space-2) var(--space-5); color: var(--color-text-secondary); font-size: var(--font-size-caption); }
.message-timeline { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: var(--space-4); }
.message { width: min(90%, 80ch); padding: var(--space-5); background: var(--color-surface); border: 1px solid var(--color-border-strong); border-radius: var(--radius-md); }
.message-user { align-self: flex-start; }
.message-assistant { align-self: flex-end; background: var(--color-info-bg); border-left: 3px solid var(--color-primary); }
.message-header { display: flex; align-items: baseline; justify-content: space-between; flex-wrap: wrap; gap: var(--space-2); margin-bottom: var(--space-3); font-size: var(--font-size-caption); }
.message-header time { color: var(--color-text-secondary); }
.message-content { white-space: pre-wrap; overflow-wrap: anywhere; line-height: 1.5; }
.message-meta, .message-note { margin-top: var(--space-3); color: var(--color-text-secondary); font-size: var(--font-size-caption); }
.delivery-warning { padding-top: var(--space-3); border-top: 1px solid var(--color-border-strong); color: var(--color-warning); }
.logged-options { display: flex; flex-wrap: wrap; gap: var(--space-2); margin-top: var(--space-3); }
.logged-options span { border: 1px solid var(--color-border-strong); border-radius: var(--radius-sm); padding: var(--space-1) var(--space-2); font-size: var(--font-size-caption); }
.history-pagination { justify-content: center; margin-top: var(--space-5); }

/* Login uses the same brand, fields, feedback and button components. */
.login-layout { display: grid; place-items: center; min-height: calc(100vh - var(--header-height) - var(--space-8)); padding: var(--space-7) var(--space-5); }
.login-card { width: 100%; max-width: 448px; padding: var(--space-6); border-top: 3px solid var(--color-accent); }
.login-card h1 { margin-bottom: var(--space-3); }
.login-card > .alert { margin-top: var(--space-5); }
.login-form { display: grid; gap: var(--space-4); margin-top: var(--space-5); }
.login-note { margin-top: var(--space-5); font-size: var(--font-size-caption); color: var(--color-text-secondary); }

@media (max-width: 1439px) {
  .table-hint { display: block; }
  .data-table th, .data-table td { padding-inline: var(--space-3); }
  .person-name { min-width: 128px; }
  .description-cell { min-width: 144px; }
  .row-actions { min-width: 128px; }
}
@media (min-width: 640px) and (max-width: 1023px) {
  .app-shell { grid-template-columns: 1fr; grid-template-rows: auto 1fr; }
  .app-sidebar { width: 100%; border-right: 0; border-bottom: 1px solid var(--color-border); padding: var(--space-2) var(--space-5); }
  .navigation-label { display: none; }
  .admin-nav { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .admin-nav a { justify-content: center; }
  .history-filters > .col-3 { grid-column: span 6; }
}
@media (max-width: 639px) {
  .app-header { flex-wrap: wrap; gap: var(--space-2); padding: var(--space-2) var(--space-4); }
  .brand { gap: var(--space-2); }
  .brand .brand-logo { width: 88px; }
  .brand-text { padding-left: var(--space-2); }
  .account { width: 100%; justify-content: space-between; border-top: 1px solid var(--color-border); padding-top: var(--space-2); }
  .account-name { max-width: none; }
  .app-shell { grid-template-columns: 1fr; grid-template-rows: auto 1fr; }
  .app-sidebar { width: 100%; padding: var(--space-2); border-right: 0; border-bottom: 1px solid var(--color-border); }
  .navigation-label { display: none; }
  .admin-nav { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--space-1); }
  .admin-nav a { justify-content: center; padding-inline: var(--space-2); }
  .page-container { padding: var(--space-5) var(--space-4); }
  .page-header { flex-direction: column; }
  .summary { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-3); }
  .panel-toolbar, .panel-footer, .toolbar, .filter-panel, .detail-panel, .form-section { padding: var(--space-4); }
  .panel-footer { align-items: flex-start; flex-direction: column; }
  .form-grid { grid-template-columns: minmax(0, 1fr); }
  .form-grid > [class*="col-"] { grid-column: 1; }
  .search-form { flex-wrap: wrap; }
  .search-form .field { flex-basis: 100%; }
  .form-control { font-size: 16px; min-height: var(--control-height-lg); }
  .button, .text-action, .pagination a, .breadcrumb a { min-height: var(--control-height-lg); }
  .form-actions { flex-direction: column; align-items: stretch; }
  .detail-actions { align-items: stretch; }
  .detail-actions .danger-link { margin-left: 0; }
  .detail-grid { grid-template-columns: minmax(0, 1fr); gap: var(--space-1); }
  .detail-grid dd + dt { margin-top: var(--space-3); }
  .message { width: 100%; padding: var(--space-4); }
  .login-layout { padding: var(--space-5) var(--space-4); }
  .login-card { padding: var(--space-5); }
  .app-footer { padding: var(--space-5) var(--space-4); }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

.daily-panel { margin-top: var(--space-5); }