/* Shared components (DESIGN_SYSTEM.md sections 7 and 9). Each one lives here once and is
   reused by every page. Colours, spacing and sizes come from tokens.css only.
   Mobile rules sit in the @media (max-width: 767px) block at the end. */

/* ---- page header (7.11): small label, title, and the one main action ---- */

.page-header {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.page-header-text {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  min-width: 0;
}

/* Cards and other blocks that sit one under another */
.stack {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

/* ---- buttons (7.1): all 48px tall ---- */

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: var(--control-height);
  padding: 0 var(--space-6);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.2;
  text-decoration: none;
  white-space: nowrap;
  border: 1px solid transparent;
  border-radius: var(--radius-control);
  transition: background-color 150ms ease, color 150ms ease;
}

/* The one main action on a screen */
.button-primary {
  color: var(--text-on-accent);
  background: var(--accent);
}

.button-primary:hover {
  color: var(--text-on-accent);
  background: var(--accent-hover);
}

.button-primary:active {
  background: var(--accent-active);
}

/* Cancel, Back, Sign out, Edit */
.button-secondary {
  color: var(--text-primary);
  background: var(--bg-surface);
  border-color: var(--border-control);
}

.button-secondary:hover {
  color: var(--text-primary);
  background: var(--bg-surface-muted);
}

.button-secondary:active {
  background: var(--border);
}

/* Only inside a confirmation: Yes, delete */
.button-danger {
  color: var(--text-on-accent);
  background: var(--danger);
}

.button-danger:hover {
  color: var(--text-on-accent);
  background: color-mix(in srgb, var(--danger) 88%, var(--text-primary));
}

.button-danger:active {
  background: color-mix(in srgb, var(--danger) 76%, var(--text-primary));
}

/* Small extra actions: Resend SMS */
.button-quiet {
  color: var(--accent);
  background: transparent;
}

.button-quiet:hover {
  color: var(--accent-hover);
  background: var(--accent-soft);
}

.button-quiet:active {
  color: var(--accent-active);
}

/* View, edit and delete inside a row. Always give it an accessible name. */
.icon-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: var(--tap-min);
  height: var(--tap-min);
  padding: 0;
  color: var(--text-primary);
  text-decoration: none;
  background: var(--bg-surface);
  border: 1px solid var(--border-control);
  border-radius: var(--radius-small);
  transition: background-color 150ms ease;
}

.icon-button:hover {
  color: var(--text-primary);
  background: var(--bg-surface-muted);
}

.icon-button:active {
  background: var(--border);
}

/* Disabled: say why next to it when it is not obvious */
/* Not while htmx is sending the form: hx-disabled-elt disables the button then, and it
   should look busy (spinner, below), not unavailable */
.button:disabled:not(.htmx-request .button),
.button[aria-disabled="true"],
.icon-button:disabled {
  color: var(--text-disabled);
  background: var(--bg-surface-muted);
  border-color: transparent;
  cursor: not-allowed;
}

/* Loading: the working word and a spinner, the same width, and not clickable again.
   Both words sit in the same grid cell, so the button never changes size. */
.button-label {
  display: grid;
}

.button-label > * {
  grid-area: 1 / 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
}

.button-working {
  visibility: hidden;
}

.htmx-request .button,
.button.htmx-request,
.button.is-loading {
  pointer-events: none;
}

.htmx-request .button-label > :not(.button-working),
.button.htmx-request .button-label > :not(.button-working),
.button.is-loading .button-label > :not(.button-working) {
  visibility: hidden;
}

.htmx-request .button-working,
.button.htmx-request .button-working,
.button.is-loading .button-working {
  visibility: visible;
}

/* A small spinner. With reduced motion it stays still (section 11). */
.button-working::before,
.loading-placeholder::before {
  content: "";
  flex: none;
  width: 16px;
  height: 16px;
  border: 2px solid currentColor;
  border-right-color: transparent;
  border-radius: 50%;
  animation: spin 800ms linear infinite;
}

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

/* htmx's own indicator styles are turned off, so the indicator is styled here */
.htmx-indicator {
  display: none;
}

.htmx-request .htmx-indicator,
.htmx-request.htmx-indicator {
  display: inline-flex;
}

/* Fragments being swapped show this, never a blank gap */
.loading-placeholder {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-4) 0;
  color: var(--text-secondary);
}

/* A button that fills the width of its form, on every screen (the sign in button) */
.button-wide {
  width: 100%;
}

/* Buttons that finish a form: side by side on desktop, stacked on mobile */
.form-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

/* ---- form fields (7.2) ---- */

.form {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  max-width: 560px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.field-label {
  font-weight: 600;
}

/* The word "required" in the label, not just a star */
.field-required {
  font-size: 14px;
  font-weight: 400;
  color: var(--text-secondary);
}

.input,
.select,
.textarea {
  width: 100%;
  min-height: var(--control-height);
  padding: 0 var(--space-4);
  font-size: 16px;
  color: var(--text-primary);
  background: var(--bg-surface);
  border: 1px solid var(--border-control);
  border-radius: var(--radius-control);
}

.textarea {
  min-height: 96px;
  padding: var(--space-3) var(--space-4);
}

.input::placeholder,
.textarea::placeholder {
  color: var(--text-placeholder);
}

/* The reading and amount fields are the biggest in the app */
.input-large {
  min-height: 56px;
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 600;
  line-height: 1.2;
}

/* Read-only: filled in for you, with a note under it */
.input[readonly] {
  background: var(--bg-surface-muted);
}

.input:disabled,
.select:disabled,
.textarea:disabled {
  color: var(--text-disabled);
  background: var(--bg-surface-muted);
  cursor: not-allowed;
}

.field-help {
  font-size: 14px;
  line-height: 1.45;
  color: var(--text-secondary);
}

/* A field with an error: danger border, and a message that says how to fix it */
.input[aria-invalid="true"],
.select[aria-invalid="true"],
.textarea[aria-invalid="true"] {
  border-color: var(--danger);
}

.field-error {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  font-size: 14px;
  line-height: 1.45;
  color: var(--danger-text);
}

.field-error .icon {
  flex: none;
  margin-top: 1px;
}

/* A password box with a Show button inside its right end (app.js does the swapping) */
.password-field {
  position: relative;
}

.password-field .input {
  padding-right: 80px;
}

.password-toggle {
  position: absolute;
  top: 2px;
  right: 2px;
  min-width: 64px;
  height: var(--tap-min);
  padding: 0 var(--space-3);
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
  background: transparent;
  border: 0;
  border-radius: var(--radius-small);
}

.password-toggle:hover {
  background: var(--accent-soft);
}

/* Two short fields side by side, on desktop only (first and last name) */
.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-5);
}

/* ---- cards (7.3): never nested inside another card ---- */

.card {
  padding: var(--space-6);
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
}

.card-title {
  font-size: 16px;
  font-weight: 700;
  line-height: 1.3;
}

.card-description {
  margin-top: var(--space-1);
  font-size: 14px;
  line-height: 1.45;
  color: var(--text-secondary);
}

/* Space between a card's title and what follows it. A description sits close under
   its title, and the content after the description gets the full space. */
.card-title + *,
.card-description + * {
  margin-top: var(--space-4);
}

.card-title + .card-description {
  margin-top: var(--space-1);
}

/* ---- stat card (7.4): label, big figure, one line of explanation ---- */

.stat-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-6);
}

.stat-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  min-width: 0;
  padding: var(--space-6);
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
}

.stat-figure {
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 600;
  line-height: 1.1;
  overflow-wrap: anywhere;
}

/* ---- status badge (7.5): a pill with an icon and a word ---- */

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 28px;
  padding: 0 var(--space-3);
  font-size: 14px;
  font-weight: 600;
  line-height: 1;
  white-space: nowrap;
  border-radius: var(--radius-pill);
}

.badge-paid,
.badge-active {
  color: var(--success-text);
  background: var(--success-bg);
}

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

.badge-unpaid {
  color: var(--danger-text);
  background: var(--danger-bg);
}

.badge-inactive {
  color: var(--text-secondary);
  background: var(--bg-surface-muted);
}

/* ---- tables (7.6): a table on desktop, stacked cards on mobile ---- */

.table {
  width: 100%;
  border-collapse: collapse;
}

.table th {
  padding: var(--space-3);
  font-size: 12px;
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: 0.05em;
  text-align: left;
  text-transform: uppercase;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
}

.table td {
  height: 56px;
  padding: var(--space-2) var(--space-3);
  vertical-align: middle;
  border-bottom: 1px solid var(--border);
}

.table tbody tr:last-child td {
  border-bottom: 0;
}

.table tbody tr:hover td {
  background: var(--bg-surface-muted);
}

.table th:first-child,
.table td:first-child {
  padding-left: 0;
}

.table th:last-child,
.table td:last-child {
  padding-right: 0;
}

/* Money columns are mono and right aligned */
.table .cell-number {
  font-family: var(--font-mono);
  font-weight: 600;
  text-align: right;
  white-space: nowrap;
}

/* A number column's heading lines up with its figures, in the normal label font */
.table th.cell-number {
  font-family: var(--font-ui);
}

/* A row's first cell: the bold name, and a quieter line under it */
.cell-title {
  display: block;
  font-weight: 700;
}

.cell-sub {
  display: block;
  font-size: 14px;
  line-height: 1.45;
  color: var(--text-secondary);
}

/* View, edit and delete buttons at the end of a row */
.row-actions {
  position: relative;
  z-index: 1;
  display: flex;
  gap: var(--space-2);
}

/* Makes a whole row or card open its link. Buttons in the row sit above it. */
.table tbody tr {
  position: relative;
}

.stretched-link::after {
  content: "";
  position: absolute;
  inset: 0;
}

/* Selected (a chosen customer, a chosen row) */
.is-selected {
  background: var(--accent-soft);
  border-color: var(--accent);
}

/* ---- modal (7.9): for things that cannot easily be undone ---- */

.modal {
  width: calc(100% - var(--space-8));
  max-width: 440px;
  padding: 0;
  color: var(--text-primary);
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
}

/* A dark transparent backdrop lifts the modal. No shadow. */
.modal::backdrop {
  background: color-mix(in srgb, var(--text-primary) 50%, transparent);
}

.modal-body {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding: var(--space-6);
}

.modal-title {
  font-size: 18px;
  font-weight: 700;
  line-height: 1.3;
}

/* The safe choice first and quieter, the action second */
.modal-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: var(--space-3);
  margin-top: var(--space-3);
}

/* ---- messages (7.10): success, info, warning, error ---- */

.messages {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}

/* A place for messages takes no room while there is nothing to say */
.messages:empty {
  display: none;
}

.message {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-4);
  font-size: 16px;
  border-radius: var(--radius-card);
}

.message .icon {
  flex: none;
  margin-top: 2px;
}

.message-text {
  flex: 1 1 auto;
  min-width: 0;
}

.message-success {
  color: var(--success-text);
  background: var(--success-bg);
}

.message-info {
  color: var(--accent);
  background: var(--accent-soft);
}

.message-warning {
  color: var(--warning-text);
  background: var(--warning-bg);
}

.message-error {
  color: var(--danger-text);
  background: var(--danger-bg);
}

/* The close button at the end of a message */
.message-close {
  flex: none;
  min-height: var(--tap-min);
  margin: calc(var(--space-3) * -1) calc(var(--space-2) * -1) calc(var(--space-3) * -1) auto;
  padding: 0 var(--space-3);
  font-size: 14px;
  font-weight: 600;
  color: inherit;
  background: transparent;
  border: 0;
  border-radius: var(--radius-small);
}

.message-close:hover {
  text-decoration: underline;
}

/* A link inside a message keeps the message colour, and is underlined so it still reads as a link */
.message a {
  color: inherit;
  text-decoration: underline;
}

/* With several errors, a list at the top that links to each field */
.message-list {
  margin-top: var(--space-2);
  padding-left: var(--space-5);
  list-style: disc;
}

/* ---- search box: a list's search, with its button beside it (Customers, Readings) ---- */

.search-form {
  max-width: 560px;
  margin-bottom: var(--space-6);
}

.search-row {
  display: flex;
  gap: var(--space-3);
}

.search-row .input {
  flex: 1 1 auto;
  min-width: 0;
}

/* "3 customers found." Takes no room while there is nothing to say. */
.search-status {
  margin-top: var(--space-2);
}

.search-status:empty {
  display: none;
}

/* The hint a live line shows before anything is typed (units used, still owed) */
.line-hint {
  font-size: 14px;
  color: var(--text-secondary);
}

/* "Showing the first 200..." under a long list */
.list-note {
  margin-top: var(--space-4);
}

/* A spot for a message inside a dialog, empty until something goes wrong */
.dialog-error:empty {
  display: none;
}

/* ---- empty state: an icon, one friendly sentence, one action ---- */

.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-12) var(--space-4);
  text-align: center;
  color: var(--text-secondary);
}

/* The error page: one centred card, with or without the app shell around it */
.error-card {
  width: calc(100% - var(--space-8));
  max-width: 560px;
  margin: var(--space-12) auto;
}

/* ---- mobile ---- */

@media (max-width: 767px) {
  .search-form {
    margin-bottom: var(--space-4);
  }

  /* A page that opens from a list has its Back button in the top bar on a phone (7.7) */
  .page-back {
    display: none;
  }

  .page-header {
    flex-direction: column;
    align-items: stretch;
  }

  .page-header .button {
    width: 100%;
  }

  .stack {
    gap: var(--space-4);
  }

  .card,
  .stat-card {
    padding: var(--space-4);
  }

  /* A button that finishes a form is full width, and buttons stack */
  .form-actions {
    flex-direction: column;
  }

  .form-actions .button {
    width: 100%;
  }

  /* Short fields no longer sit side by side */
  .field-row {
    grid-template-columns: 1fr;
    gap: var(--space-5);
  }

  .stat-grid {
    gap: var(--space-4);
  }

  .stat-figure {
    font-size: 26px;
  }

  /* Modal slides up from the bottom as a sheet */
  .modal {
    width: 100%;
    max-width: none;
    margin: auto 0 0;
    border-radius: var(--radius-card) var(--radius-card) 0 0;
    animation: sheet-up 150ms ease;
  }

  .modal-actions {
    flex-direction: column;
  }

  .modal-actions .button {
    width: 100%;
  }
}

@container page (max-width: 719px) {
  /* Tables never scroll sideways (7.6). When the content column is narrower than 720px,
     which is every phone and also a tablet beside the sidebar, each row becomes a card:
     the first cell and any cell marked .cell-end share the top line, and every other
     cell is a line below. */
  .table-card {
    padding: 0;
    background: transparent;
    border: 0;
  }

  .table,
  .table tbody {
    display: block;
  }

  .table thead {
    display: none;
  }

  .table tbody {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
  }

  .table tbody tr {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: var(--space-1) var(--space-3);
    min-height: 56px;
    padding: var(--space-4);
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-card);
  }

  .table td,
  .table td:first-child,
  .table td:last-child {
    display: block;
    grid-column: 1 / -1;
    height: auto;
    padding: 0;
    border: 0;
  }

  .table tbody tr:hover td {
    background: transparent;
  }

  .table td:first-child {
    grid-column: 1;
  }

  .table td.cell-end {
    grid-column: 2;
    grid-row: 1;
  }

  .table .cell-number {
    text-align: left;
  }

  /* A cell's heading, taken from its data-label, written in front of it */
  .table td[data-label]::before {
    content: attr(data-label) ": ";
    font-family: var(--font-ui);
    font-weight: 400;
    color: var(--text-secondary);
  }
}

@keyframes sheet-up {
  from {
    transform: translateY(100%);
  }
}

/* Four stat cards across on desktop, two on narrow tablets and from 480px up,
   one per row below that (7.4) */
@media (max-width: 1023px) {
  .stat-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 479px) {
  .stat-grid {
    grid-template-columns: 1fr;
  }
}