/* ==========================================================================
   Design tokens
   Color values chosen via the dataviz skill's palette method (documented
   ramps + WCAG contrast checks run with the skill's validate_palette.py
   `contrast()` helper), not hand-picked. See the phase report for the
   per-token contrast numbers.
   ========================================================================== */

:root {
  --color-bg: #f9f9f7;
  --color-surface: #fcfcfb;
  --color-surface-2: #f2f1ec;
  --color-border: rgba(11, 11, 11, 0.10);

  --color-text: #0b0b0b;
  --color-text-muted: #52514e;

  --color-accent: #256abf;
  --color-accent-contrast: #ffffff;

  --color-success: #006300;
  --color-success-bg: #e2f6e0;
  --color-danger: #a52a2a;
  --color-danger-bg: #fbe2e1;
  --color-warning: #8a5a00;
  --color-warning-bg: #fff2d6;
  --color-test: #4a3aa7;
  --color-test-bg: #ece9fb;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 14px;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;

  --shadow-sm: 0 1px 2px rgba(11, 11, 11, 0.06), 0 1px 3px rgba(11, 11, 11, 0.08);
  --shadow-md: 0 4px 12px rgba(11, 11, 11, 0.08), 0 2px 4px rgba(11, 11, 11, 0.06);

  --font-sans: system-ui, -apple-system, "Segoe UI", sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #0d0d0d;
    --color-surface: #1a1a19;
    --color-surface-2: #232322;
    --color-border: rgba(255, 255, 255, 0.10);

    --color-text: #ffffff;
    --color-text-muted: #c3c2b7;

    --color-accent: #256abf;
    --color-accent-contrast: #ffffff;

    --color-success: #0ca30c;
    --color-success-bg: #0f2814;
    --color-danger: #e66767;
    --color-danger-bg: #3a1616;
    --color-warning: #fab219;
    --color-warning-bg: #3a2a06;
    --color-test: #9085e9;
    --color-test-bg: #1e1a3a;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.35), 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.45), 0 2px 4px rgba(0, 0, 0, 0.3);
  }
}

/* ==========================================================================
   Base elements
   ========================================================================== */

* {
  box-sizing: border-box;
}

body {
  font-family: var(--font-sans);
  margin: 0;
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.5;
}

main {
  padding: var(--space-4);
}

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

pre {
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

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

/* ==========================================================================
   Topbar + navigation
   ========================================================================== */

/* The topbar and subnav are fixed chrome, not page content: they keep a
   stable high-contrast look in both color schemes (dark bar / white text,
   light pill / dark text) rather than following --color-bg/--color-text,
   since those tokens flip per scheme and chrome shouldn't. */
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-4);
  padding: var(--space-4);
  background: #1a1a1a;
  color: #fff;
}

.topbar-links,
.topbar-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.topbar-actions form {
  margin: 0;
}

.brand {
  font-weight: 700;
}

.topbar a {
  color: #fff;
  text-decoration: none;
}

.topbar a:hover,
.topbar a:focus-visible {
  text-decoration: underline;
}

nav ul {
  display: flex;
  gap: var(--space-3);
  list-style: none;
  padding: var(--space-3);
  margin: 0 0 var(--space-4);
  background: #eee;
  border-radius: var(--radius-lg);
  flex-wrap: wrap;
}

nav a {
  color: #1a1a1a;
  text-decoration: none;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  font-weight: 600;
}

nav a:hover,
nav a:focus-visible {
  text-decoration: underline;
}

/* `.subnav` — the pill-tab treatment Phases 2-3 apply directly to a `<ul>`
   for the strategy/paper sub-navigation rows. Token-driven (unlike the bare
   `nav ul` legacy chrome above) since it lives inside the themed page body. */
.subnav {
  display: flex;
  gap: var(--space-2);
  list-style: none;
  padding: var(--space-2);
  margin: 0 0 var(--space-4);
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  flex-wrap: wrap;
}

.subnav li {
  display: flex;
}

.subnav a {
  color: var(--color-text-muted);
  text-decoration: none;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 600;
}

.subnav a:hover {
  background: var(--color-surface);
  color: var(--color-text);
}

.subnav a:focus-visible {
  text-decoration: none;
}

/* ==========================================================================
   Focus treatment
   ========================================================================== */

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
.btn:focus-visible {
  outline: 3px solid #f0b429;
  outline-offset: 2px;
}

/* ==========================================================================
   Forms
   ========================================================================== */

input,
select {
  font-family: inherit;
  font-size: 1rem;
  color: var(--color-text);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0.5rem 0.6rem;
}

input:focus-visible,
select:focus-visible {
  border-color: var(--color-accent);
}

button {
  font-family: inherit;
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0.5rem 0.9rem;
  cursor: pointer;
}

button:hover {
  background: var(--color-surface-2);
}

/* ==========================================================================
   Buttons (.btn)
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.2;
  color: var(--color-text);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0.5rem 0.9rem;
  cursor: pointer;
  text-decoration: none;
}

.btn:hover {
  background: var(--color-surface-2);
}

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

.btn-primary:hover {
  filter: brightness(0.92);
}

.btn-secondary {
  color: var(--color-text);
  background: var(--color-surface);
  border-color: var(--color-border);
}

.btn-secondary:hover {
  background: var(--color-surface-2);
}

.btn-danger {
  color: var(--color-accent-contrast);
  background: var(--color-danger);
  border-color: var(--color-danger);
}

.btn-danger:hover {
  filter: brightness(0.92);
}

@media (prefers-color-scheme: dark) {
  /* --color-danger is stepped light in dark mode for legibility as text, but
     that makes it too light for white-on-solid button fills; darken it for
     the button surface only (verified white-on-result contrast 4.81:1). */
  .btn-danger {
    background: color-mix(in srgb, var(--color-danger) 80%, black);
    border-color: color-mix(in srgb, var(--color-danger) 80%, black);
  }
}

.btn-sm {
  font-size: 0.8rem;
  padding: 0.3rem 0.6rem;
}

/* ==========================================================================
   Card
   ========================================================================== */

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  margin: var(--space-4) 0;
}

.card-header {
  padding: var(--space-4);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  flex-wrap: wrap;
}

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

/* ==========================================================================
   Badges
   ========================================================================== */

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  background: var(--color-surface-2);
  color: var(--color-text-muted);
}

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

.badge-neutral {
  background: var(--color-surface-2);
  color: var(--color-text-muted);
}

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

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

.badge-test {
  background: var(--color-test-bg);
  color: var(--color-test);
}

/* ==========================================================================
   Tag — small neutral classification chip
   ========================================================================== */

.tag {
  display: inline-flex;
  align-items: center;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-sm);
  background: var(--color-surface-2);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
}

/* Tag picker — clickable filter tags on the sorting events feed */
.tag-picker {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1);
  margin-bottom: var(--space-2);
}

.tag-picker-label {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-text-muted);
  margin-right: var(--space-1);
}

a.tag {
  text-decoration: none;
  cursor: pointer;
}

a.tag.tag-active {
  background: var(--color-accent);
  color: var(--color-accent-contrast);
  border-color: var(--color-accent);
}

/* ==========================================================================
   Stat grid / tile — and the .metric-grid bridge
   `.metric-grid` (paper_pnl.html today) keeps working standalone: it is
   restyled in place with the same tokens rather than renamed, since Phase 1
   cannot touch templates. `.stat-grid`/`.stat-tile` are the new classes
   Phase 3 will move paper_pnl.html's markup to; both share the same visual
   language so the swap is a no-op visually.
   ========================================================================== */

.stat-grid,
.metric-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr));
  gap: var(--space-4);
  margin: var(--space-4) 0;
}

.stat-tile,
.metric-grid > div {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  padding: var(--space-4);
}

.stat-tile .label,
.metric-grid > div > strong {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.stat-tile .value,
.metric-grid span {
  display: block;
  font-size: 1.35rem;
  font-weight: 700;
  margin-top: 0.4rem;
  font-variant-numeric: tabular-nums;
}

/* ==========================================================================
   Tables
   ========================================================================== */

table {
  border-collapse: collapse;
  width: 100%;
  background: var(--color-surface);
}

th,
td {
  border-bottom: 1px solid var(--color-border);
  padding: 0.6rem 0.75rem;
  text-align: left;
}

th {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  color: var(--color-text-muted);
  background: var(--color-surface-2);
}

tbody tr:nth-child(even) {
  background: var(--color-surface-2);
}

/* ==========================================================================
   Alerts / warnings
   ========================================================================== */

.alert {
  margin: var(--space-4) 0;
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-border);
  border-left-width: 5px;
  border-left-style: solid;
  border-left-color: var(--color-danger);
  border-radius: var(--radius-sm);
  background: var(--color-danger-bg);
}

.alert-danger {
  color: var(--color-danger);
  font-weight: 600;
}

.warning {
  border-left: 5px solid var(--color-warning);
  background: var(--color-warning-bg);
  color: var(--color-text);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-sm);
  margin: var(--space-4) 0;
}

/* ==========================================================================
   Pre-existing components — restyled in place with the new tokens
   ========================================================================== */

.auth {
  max-width: 320px;
  margin: 10vh auto;
  padding: var(--space-5);
}

.auth label {
  display: block;
  margin-bottom: var(--space-4);
}

.auth input {
  display: block;
  width: 100%;
  padding: 0.5rem;
  margin-top: var(--space-1);
  box-sizing: border-box;
}

.error {
  color: var(--color-danger);
}

.status-healthy {
  color: var(--color-success);
}

.status-unhealthy {
  color: var(--color-danger);
}

.status-success {
  color: var(--color-success);
  background: var(--color-success-bg);
  border: 1px solid var(--color-success);
  font-weight: 700;
}

.status-warning {
  color: var(--color-warning);
  background: var(--color-warning-bg);
  border: 1px solid var(--color-warning);
  font-weight: 700;
}

.status-danger {
  color: var(--color-danger);
  background: var(--color-danger-bg);
  border: 1px solid var(--color-danger);
  font-weight: 700;
}

.status-neutral {
  color: var(--color-text-muted);
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  font-weight: 700;
}

.status-success,
.status-warning,
.status-danger,
.status-neutral {
  display: inline-block;
  border-radius: 999px;
  padding: 0.15rem 0.55rem;
  line-height: 1.35;
}

.announcement-group {
  margin: var(--space-5) 0;
}

.announcement-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin: var(--space-3) 0;
  padding: var(--space-4);
}

.test-event {
  border: 1px solid var(--color-test);
  border-left-width: 4px;
  background: var(--color-test-bg);
}

.test-badge {
  color: var(--color-accent-contrast);
  background: var(--color-test);
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 700;
}

.inline-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
}

.inline-actions form {
  display: inline;
}

.paper-page {
  max-width: 1200px;
  margin: 0 auto;
}

.paper-form,
.confirmation-card,
.danger-zone {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  margin: var(--space-4) 0;
  box-shadow: var(--shadow-sm);
}

.paper-form label,
.danger-zone label {
  display: block;
  margin: var(--space-3) 0;
}

.paper-form input,
.paper-form select,
.danger-zone input {
  display: block;
  width: 100%;
  max-width: 36rem;
  padding: 0.45rem;
  box-sizing: border-box;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr));
  gap: var(--space-4);
}

.confirmation-card dt {
  font-weight: 700;
}

.confirmation-card dd {
  margin-bottom: var(--space-3);
}

.danger-zone {
  border-left: 5px solid var(--color-danger);
}

.mode-badge {
  display: inline-flex;
  align-items: center;
  font-weight: 800;
  font-size: 0.75rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
  color: var(--color-accent-contrast);
}

.mode-live {
  background: var(--color-success);
}

.mode-test {
  background: var(--color-test);
}

@media (prefers-color-scheme: dark) {
  /* --color-test/--color-success are stepped light in dark mode for their
     text-on-neutral-surface role (badges); that's too light for white text
     on a solid fill, so darken for this solid-background use only (matches
     the .btn-danger treatment above; verified white-on-result contrast
     4.99:1 / 4.67:1). Placed after the base rules it overrides — an
     earlier-in-file @media block loses to a later same-specificity rule. */
  .test-badge,
  .mode-test {
    background: color-mix(in srgb, var(--color-test) 80%, black);
  }

  .mode-live {
    background: color-mix(in srgb, var(--color-success) 80%, black);
  }
}

.strategy-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  padding: var(--space-4);
  margin: var(--space-4) 0;
}

.test-zone {
  background: var(--color-test-bg);
  border: 1px solid var(--color-test);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  margin: var(--space-4) 0;
}