/*
 * Visual identity ported from src/dashboard.py. Color palette, font
 * stack, card chrome, and monospace regression box match the Dash
 * version so a viewer who compares the two does not see a regression.
 */

:root {
  --color-bg: #f8f9fa;
  --color-text: #2c3e50;
  --color-primary: #3498db;
  --color-secondary: #e74c3c;
  --color-accent: #2ecc71;
  --color-light-gray: #f0f0f0;
  --color-border: #e1e4e8;
  --color-amber: #d97706;

  --font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
    "Liberation Mono", monospace;

  --radius-card: 12px;
  --radius-control: 4px;
  --shadow-card: 0 2px 8px rgba(0, 0, 0, 0.1);
}

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

html,
body {
  margin: 0;
  padding: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-family);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 40px 24px;
  min-height: 100vh;
}

.page-title {
  font-size: 32px;
  font-weight: 600;
  color: var(--color-text);
  text-align: center;
  margin: 0 0 32px;
}

.card {
  background: white;
  padding: 24px;
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  margin-bottom: 24px;
}

/* ------------------------------------------------------------------
 * Tab control. Radios are visually hidden but remain focusable. The
 * sibling combinators below light up the matching .tab-panel and the
 * matching label based on the :checked radio.
 * ------------------------------------------------------------------ */

.tabs {
  position: relative;
}

.tab-radio {
  position: absolute;
  opacity: 0;
  pointer-events: none;
  width: 0;
  height: 0;
}

.tab-bar {
  display: flex;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 24px;
  gap: 0;
}

.tab-label {
  padding: 12px 20px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
  border-bottom: 2px solid transparent;
  user-select: none;
  transition: color 150ms ease, border-color 150ms ease;
}

.tab-label:hover {
  color: var(--color-primary);
}

#tab-sector:checked ~ .tab-bar label[for="tab-sector"],
#tab-individual:checked ~ .tab-bar label[for="tab-individual"],
#tab-factor:checked ~ .tab-bar label[for="tab-factor"] {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.tab-panel {
  display: none;
}

#tab-sector:checked ~ #panel-sector,
#tab-individual:checked ~ #panel-individual,
#tab-factor:checked ~ #panel-factor {
  display: block;
}

/* ------------------------------------------------------------------
 * Form controls.
 * ------------------------------------------------------------------ */

.dropdown-container {
  display: flex;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
}

.dropdown-group {
  display: flex;
  flex-direction: column;
  min-width: 280px;
}

.field-label {
  font-size: 16px;
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: 8px;
}

.select,
.text-input {
  padding: 8px 12px;
  border-radius: var(--radius-control);
  border: 1px solid var(--color-border);
  font-family: var(--font-family);
  font-size: 14px;
  color: var(--color-text);
  background: white;
  width: 300px;
}

.text-input {
  width: 200px;
}

.select:focus,
.text-input:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 1px;
}

.button {
  background: var(--color-primary);
  color: white;
  border: none;
  padding: 8px 16px;
  border-radius: var(--radius-control);
  cursor: pointer;
  font-family: var(--font-family);
  font-size: 14px;
  font-weight: 500;
  transition: filter 150ms ease;
}

.button:hover {
  filter: brightness(0.94);
}

.button:active {
  filter: brightness(0.88);
}

.button:focus-visible {
  outline: 2px solid var(--color-text);
  outline-offset: 2px;
}

.input-row {
  display: flex;
  align-items: end;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.input-row .field-label {
  margin-bottom: 0;
  align-self: center;
}

.status-line {
  text-align: center;
  font-size: 14px;
  color: var(--color-text);
  min-height: 22px;
}

.status-line .status-error {
  color: var(--color-secondary);
  font-weight: 500;
}

.status-line .status-success-ticker {
  color: var(--color-primary);
  font-weight: 600;
}

/* ------------------------------------------------------------------
 * Plot containers.
 * ------------------------------------------------------------------ */

.plot {
  width: 100%;
  min-height: 600px;
}

.plot-short {
  min-height: 200px;
}

/* ------------------------------------------------------------------
 * Company info card.
 * ------------------------------------------------------------------ */

.info-block {
  font-size: 14px;
}

.info-block h3 {
  font-size: 24px;
  font-weight: 600;
  color: var(--color-text);
  margin: 0 0 16px;
  border-bottom: 2px solid var(--color-light-gray);
  padding-bottom: 12px;
}

.info-block h4 {
  font-size: 18px;
  font-weight: 500;
  color: var(--color-text);
  margin: 16px 0 12px;
}

.info-block p {
  margin: 0 0 8px;
  font-size: 16px;
}

.info-row {
  display: flex;
  margin-bottom: 8px;
  font-size: 14px;
}

.info-row .info-label {
  font-weight: 500;
  margin-right: 4px;
}

.info-row .info-value-unavailable {
  color: var(--color-secondary);
  font-style: italic;
}

/* ------------------------------------------------------------------
 * Factor Selection tab.
 * ------------------------------------------------------------------ */

.section-title {
  font-size: 24px;
  font-weight: 500;
  color: var(--color-text);
  margin: 0 0 16px;
}

.factor-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 30px;
}

.factor-controls {
  flex: 1;
  min-width: 300px;
}

.factor-output {
  flex: 2;
  min-width: 500px;
}

.factor-fieldset {
  border: none;
  padding: 0;
  margin: 0;
}

.factor-group {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 10px 0;
  font-weight: bold;
  cursor: pointer;
}

.factor-checkbox {
  width: 16px;
  height: 16px;
  cursor: pointer;
}

.factor-name {
  font-size: 14px;
}

.metrics-display {
  margin-bottom: 15px;
}

.metrics-display.is-hidden {
  display: none;
}

.metrics-caption {
  font-size: 13px;
  color: var(--color-text);
  margin-left: 20px;
}

.metrics-list {
  margin: 4px 0 0 40px;
  padding: 0;
  font-size: 13px;
  list-style: disc inside;
}

.metrics-list li {
  list-style-position: inside;
  margin-left: 0;
}

.regression-output {
  font-family: var(--font-mono);
  white-space: pre-wrap;
  overflow-x: auto;
  border: 1px solid var(--color-border);
  padding: 15px;
  border-radius: var(--radius-control);
  background: var(--color-bg);
  font-size: 12px;
  color: var(--color-text);
  margin-top: 12px;
  min-height: 100px;
}

/* ------------------------------------------------------------------
 * Backtest credibility footer.
 * ------------------------------------------------------------------ */

.footer {
  margin-top: 16px;
  padding: 20px 24px;
  background: white;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  font-size: 13px;
  color: var(--color-text);
  line-height: 1.55;
}

.footer h4 {
  font-size: 14px;
  font-weight: 600;
  margin: 0 0 8px;
  color: var(--color-text);
}

.footer p {
  margin: 0 0 6px;
}

.footer a {
  color: var(--color-primary);
  text-decoration: none;
}

.footer a:hover {
  text-decoration: underline;
}

.footer .footer-links {
  margin-top: 8px;
  font-size: 12px;
  color: #64748b;
}

/* ------------------------------------------------------------------
 * Accessibility helpers.
 * ------------------------------------------------------------------ */

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ------------------------------------------------------------------
 * Responsive tweaks.
 * ------------------------------------------------------------------ */

@media (max-width: 720px) {
  .container {
    padding: 20px 12px;
  }

  .page-title {
    font-size: 24px;
    margin-bottom: 20px;
  }

  .card {
    padding: 16px;
  }

  .select,
  .text-input {
    width: 100%;
  }

  .dropdown-group {
    min-width: 0;
    width: 100%;
  }

  .factor-output {
    min-width: 0;
  }
}