/* caserag SPA design system.
 *
 * Restrained, professional register: system fonts, one accent, generous
 * whitespace, subtle borders, minimal shadow. Colours are CSS custom
 * properties so light/dark are each defined once. Default follows the OS
 * (`prefers-color-scheme`); the theme toggle in app.js overrides that by
 * stamping `data-theme="dark"|"light"` on <html>, which the two
 * `:root[data-theme=...]` blocks below win against the media query.
 */

/* The `hidden` attribute must always win over element display rules
 * (id/class `display:` selectors otherwise override the UA `[hidden]` rule,
 * which would leave the login screen and app shell both visible). */
[hidden] {
  display: none !important;
}

:root {
  --font-sans: -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, "Cascadia Code", "SF Mono", Menlo, Consolas, monospace;

  --color-accent: #1f4b8e;
  --color-accent-hover: #163a6e;
  --color-accent-contrast: #ffffff;

  --color-bg: #f6f7f9;
  --color-surface: #ffffff;
  --color-surface-alt: #eef1f5;
  --color-border: #d7dce3;
  --color-text: #1a1d21;
  --color-text-muted: #5b6472;

  --color-danger: #8f2c26;
  --color-danger-bg: #fbeceb;
  --color-danger-border: #e3bcb8;
  --color-success: #1e6b45;
  --color-success-bg: #e9f5ee;
  --color-warning: #8a5a00;
  --color-warning-bg: #fdf3e0;
  --color-warning-border: #e9cf9c;

  --color-json-key: #7a3e9d;
  --color-json-string: #1e6b45;
  --color-json-number: #1f4b8e;
  --color-json-boolean: #b35900;
  --color-json-null: #8f2c26;
  --color-json-punct: #5b6472;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;

  --radius: 6px;
  --radius-sm: 4px;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.08);
  --shadow-md: 0 4px 16px rgba(15, 23, 42, 0.10);

  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-accent: #6592cc;
    --color-accent-hover: #86a9d6;
    --color-accent-contrast: #0c1420;

    --color-bg: #14171c;
    --color-surface: #1b1f26;
    --color-surface-alt: #232833;
    --color-border: #333a46;
    --color-text: #e7eaf0;
    --color-text-muted: #9aa4b2;

    --color-danger: #e2857c;
    --color-danger-bg: #3a2220;
    --color-danger-border: #5c3430;
    --color-success: #7fd0a6;
    --color-success-bg: #1c3327;
    --color-warning: #e0b166;
    --color-warning-bg: #3a2f14;
    --color-warning-border: #5c4a24;

    --color-json-key: #c99bec;
    --color-json-string: #7fd0a6;
    --color-json-number: #86a9d6;
    --color-json-boolean: #e0b166;
    --color-json-null: #e2857c;
    --color-json-punct: #9aa4b2;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.35);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.45);

    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --color-accent: #6592cc;
  --color-accent-hover: #86a9d6;
  --color-accent-contrast: #0c1420;

  --color-bg: #14171c;
  --color-surface: #1b1f26;
  --color-surface-alt: #232833;
  --color-border: #333a46;
  --color-text: #e7eaf0;
  --color-text-muted: #9aa4b2;

  --color-danger: #e2857c;
  --color-danger-bg: #3a2220;
  --color-danger-border: #5c3430;
  --color-success: #7fd0a6;
  --color-success-bg: #1c3327;
  --color-warning: #e0b166;
  --color-warning-bg: #3a2f14;
  --color-warning-border: #5c4a24;

  --color-json-key: #c99bec;
  --color-json-string: #7fd0a6;
  --color-json-number: #86a9d6;
  --color-json-boolean: #e0b166;
  --color-json-null: #e2857c;
  --color-json-punct: #9aa4b2;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.35);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.45);

  color-scheme: dark;
}

:root[data-theme="light"] {
  --color-accent: #1f4b8e;
  --color-accent-hover: #163a6e;
  --color-accent-contrast: #ffffff;

  --color-bg: #f6f7f9;
  --color-surface: #ffffff;
  --color-surface-alt: #eef1f5;
  --color-border: #d7dce3;
  --color-text: #1a1d21;
  --color-text-muted: #5b6472;

  --color-danger: #8f2c26;
  --color-danger-bg: #fbeceb;
  --color-danger-border: #e3bcb8;
  --color-success: #1e6b45;
  --color-success-bg: #e9f5ee;
  --color-warning: #8a5a00;
  --color-warning-bg: #fdf3e0;
  --color-warning-border: #e9cf9c;

  --color-json-key: #7a3e9d;
  --color-json-string: #1e6b45;
  --color-json-number: #1f4b8e;
  --color-json-boolean: #b35900;
  --color-json-null: #8f2c26;
  --color-json-punct: #5b6472;

  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.08);
  --shadow-md: 0 4px 16px rgba(15, 23, 42, 0.10);

  color-scheme: light;
}

/* --- Reset ------------------------------------------------------------ */

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.5;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3 {
  margin: 0 0 var(--space-3) 0;
  font-weight: 600;
  line-height: 1.25;
}

h1 {
  font-size: 1.5rem;
}

h2 {
  font-size: 1.15rem;
}

p {
  margin: 0 0 var(--space-3) 0;
}

a {
  color: var(--color-accent);
}

.muted {
  color: var(--color-text-muted);
}

.mono {
  font-family: var(--font-mono);
  font-size: 0.9em;
}

/* --- Layout: header + nav + main --------------------------------------- */

#app {
  min-height: 100%;
  display: flex;
  flex-direction: column;
}

.app-header {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  padding: var(--space-3) var(--space-5);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.app-header__brand {
  display: flex;
  align-items: baseline;
  gap: var(--space-3);
  min-width: 0;
}

.app-header__name {
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: 0.01em;
}

.app-header__case {
  font-size: 0.9rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.app-nav {
  display: flex;
  gap: var(--space-4);
  flex: 1;
}

.app-nav a {
  padding: var(--space-2) var(--space-1);
  color: var(--color-text-muted);
  text-decoration: none;
  font-weight: 500;
  border-bottom: 2px solid transparent;
}

.app-nav a:hover {
  color: var(--color-text);
}

.app-nav a.is-active {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

.app-header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

#view {
  flex: 1;
  padding: var(--space-6) var(--space-5);
  max-width: 1080px;
  width: 100%;
  margin: 0 auto;
}

.view-header {
  margin-bottom: var(--space-5);
}

.view-subtitle {
  color: var(--color-text-muted);
  margin-top: calc(var(--space-1) * -1);
}

.empty-state {
  padding: var(--space-5);
  color: var(--color-text-muted);
  text-align: center;
  border: 1px dashed var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
}

/* --- Login screen -------------------------------------------------------- */

.login-section {
  min-height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-5);
}

.login-form {
  width: 100%;
  max-width: 340px;
  display: flex;
  flex-direction: column;
}

.login-form__title {
  margin-bottom: var(--space-1);
}

.login-form__subtitle {
  margin-bottom: var(--space-5);
}

/* --- Cards ---------------------------------------------------------------- */

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: var(--space-5);
}

.create-case-form {
  margin-bottom: var(--space-5);
  max-width: 480px;
}

/* --- Forms ------------------------------------------------------------- */

label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin: var(--space-3) 0 var(--space-1) 0;
  color: var(--color-text-muted);
}

label:first-of-type {
  margin-top: 0;
}

input[type="text"],
input[type="password"],
input[type="search"],
input[type="number"],
select,
textarea {
  width: 100%;
  padding: var(--space-2) var(--space-3);
  font: inherit;
  color: var(--color-text);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
}

input:focus-visible,
select:focus-visible,
textarea:focus-visible,
button:focus-visible,
a:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.form-error {
  color: var(--color-danger);
  font-size: 0.88rem;
  margin: var(--space-2) 0 0 0;
  min-height: 1.2em;
}

.form-error:empty {
  display: none;
}

/* --- Buttons -------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  font: inherit;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  background: var(--color-surface-alt);
  color: var(--color-text);
}

.btn:hover {
  filter: brightness(0.97);
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn--primary {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-accent-contrast);
  margin-top: var(--space-4);
}

.btn--primary:hover {
  background: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
}

.btn--ghost {
  background: transparent;
  border-color: var(--color-border);
  color: var(--color-text-muted);
}

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

.btn--danger {
  background: var(--color-danger);
  border-color: var(--color-danger);
  color: #ffffff;
}

.btn--danger-ghost {
  background: transparent;
  border-color: var(--color-danger-border);
  color: var(--color-danger);
}

.btn--small {
  padding: var(--space-1) var(--space-3);
  font-size: 0.85rem;
}

/* --- Tables ----------------------------------------------------------- */

.cases-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
}

.cases-table th,
.cases-table td {
  text-align: left;
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-border);
  vertical-align: middle;
}

.cases-table th {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
  background: var(--color-surface-alt);
}

.cases-table tbody tr:last-child td {
  border-bottom: none;
}

.cases-table tbody tr.is-new {
  background: var(--color-success-bg);
}

.delete-affordance {
  display: flex;
  justify-content: flex-end;
}

.delete-confirm {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
  justify-content: flex-end;
}

.delete-confirm input[type="text"] {
  width: auto;
  min-width: 160px;
}

.delete-confirm .form-error {
  width: 100%;
  text-align: right;
  margin: 0;
}

/* --- Toasts (design-system primitive; wired up by later views) --------- */

.toast-stack {
  position: fixed;
  bottom: var(--space-5);
  right: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  z-index: 100;
}

.toast {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  padding: var(--space-3) var(--space-4);
  max-width: 320px;
}

.toast--danger {
  border-color: var(--color-danger-border);
  background: var(--color-danger-bg);
  color: var(--color-danger);
}

.toast--success {
  border-color: var(--color-success);
  background: var(--color-success-bg);
  color: var(--color-success);
}

/* --- Badges & banners --------------------------------------------------- */

.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px var(--space-2);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
}

.banner {
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  margin-bottom: var(--space-3);
}

.banner--warning {
  color: var(--color-warning);
  background: var(--color-warning-bg);
  border-color: var(--color-warning-border);
}

/* --- Search console ----------------------------------------------------- */

.search-form {
  margin-bottom: var(--space-5);
  max-width: 640px;
}

.search-results-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
  align-items: start;
}

.snippets-panel {
  display: flex;
  flex-direction: column;
}

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

.snippet-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface-alt);
}

.snippet-card__header {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-2);
}

.snippet-card__citation {
  font-weight: 700;
  flex: 1 1 auto;
}

.snippet-card__score {
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

.snippet-card__meta {
  font-size: 0.85rem;
  margin: 0 0 var(--space-2) 0;
}

.snippet-card__text {
  margin: 0;
  white-space: pre-wrap;
}

/* --- Raw payload inspector (D10) ----------------------------------------- */

.inspector-panel {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.inspector-panel__header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-1);
}

.inspector-panel__header h3 {
  margin: 0;
  flex: 1 1 auto;
}

.inspector-copy-status {
  font-size: 0.8rem;
  min-width: 4.5em;
}

.inspector-caption {
  font-size: 0.85rem;
  margin: 0 0 var(--space-3) 0;
}

.inspector-details {
  margin-top: var(--space-4);
}

.inspector-details summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--color-text-muted);
  padding: var(--space-2) 0;
}

.inspector-details .inspector-panel {
  margin-top: var(--space-3);
}

.json-tree-wrap {
  max-height: 480px;
  overflow: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
}

.json-tree {
  margin: 0;
  padding: var(--space-3);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.5;
  white-space: pre;
}

.json-key {
  color: var(--color-json-key);
}

.json-string {
  color: var(--color-json-string);
}

.json-number {
  color: var(--color-json-number);
}

.json-boolean {
  color: var(--color-json-boolean);
}

.json-null {
  color: var(--color-json-null);
  font-style: italic;
}

.json-punct {
  color: var(--color-json-punct);
}

/* --- Document browser ----------------------------------------------------- */

.docs-filter-form {
  margin-bottom: var(--space-5);
  max-width: 640px;
}

.docs-list-wrap,
.docs-detail-wrap {
  margin-bottom: var(--space-5);
}

.doc-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-top: var(--space-3);
}

.doc-row {
  display: block;
  width: 100%;
  text-align: left;
  font: inherit;
  color: inherit;
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: var(--space-3) var(--space-4);
  cursor: pointer;
}

.doc-row:hover {
  border-color: var(--color-accent);
}

.doc-row__main {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-1);
}

.doc-row__title {
  font-weight: 600;
  flex: 1 1 auto;
}

.doc-row__summary,
.doc-row__meta {
  margin: 0;
  font-size: 0.85rem;
}

.outline-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-top: var(--space-3);
}

.outline-entry {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
}

.outline-entry__number {
  flex: 0 0 auto;
  color: var(--color-text-muted);
}

.outline-entry__page {
  flex: 0 0 auto;
  font-size: 0.8rem;
}

.outline-entry__snippet {
  flex: 1 1 auto;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.fetch-form {
  margin-top: var(--space-5);
  max-width: 640px;
}

.fetch-form__range {
  display: flex;
  gap: var(--space-2);
}

.fetch-result {
  margin-top: var(--space-4);
}

.fetch-result__citation {
  color: var(--color-text-muted);
}

.fetch-paragraph {
  padding: var(--space-3) 0;
  border-top: 1px solid var(--color-border);
}

.fetch-paragraph:first-of-type {
  border-top: none;
}

.fetch-paragraph__number {
  display: block;
  font-size: 0.8rem;
  margin-bottom: var(--space-1);
}

.fetch-paragraph__text {
  margin: 0;
  white-space: pre-wrap;
}

@media (min-width: 900px) {
  .search-results-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }
}

/* --- Responsive ------------------------------------------------------- */

@media (max-width: 640px) {
  .app-header {
    flex-wrap: wrap;
    gap: var(--space-3);
  }

  .app-nav {
    order: 3;
    width: 100%;
  }

  #view {
    padding: var(--space-4);
  }

  .cases-table,
  .cases-table thead,
  .cases-table tbody,
  .cases-table th,
  .cases-table td,
  .cases-table tr {
    display: block;
  }

  .cases-table thead {
    display: none;
  }

  .cases-table tr {
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-3) var(--space-4);
  }

  .cases-table td {
    border-bottom: none;
    padding: var(--space-1) 0;
  }
}
