/* ==========================================================================
   RoboEval — shared navigation + challenge page styles
   Layered on top of Bulma. Loaded by index.html and all challenge/* pages.
   ========================================================================== */

:root {
  --re-accent: #3273dc;
  --re-accent-dark: #2366d1;
  --re-ink: #1f2430;
  --re-muted: #6b7280;
  --re-line: #e3e6ed;
  --re-surface: #ffffff;
  --re-surface-alt: #f7f8fb;
  --re-gold: #b8860b;
  --re-success: #27ae60;
  --re-danger: #c0392b;
}

/* ------------------------------ Navigation ------------------------------ */

.re-navbar {
  border-bottom: 1px solid var(--re-line);
  box-shadow: 0 1px 4px rgba(16, 24, 40, 0.04);
  background: var(--re-surface);
}

.re-navbar .navbar-brand .navbar-item img {
  max-height: 2rem;
}

.re-navbar .navbar-item,
.re-navbar .navbar-link {
  font-size: 0.95rem;
  color: var(--re-ink);
}

.re-navbar a.navbar-item:hover,
.re-navbar .navbar-link:hover {
  background-color: var(--re-surface-alt);
  color: var(--re-accent);
}

/* Current page marker */
.re-navbar a.navbar-item.is-current,
.re-navbar .navbar-item.has-dropdown.is-current > .navbar-link {
  color: var(--re-accent);
  font-weight: 600;
  box-shadow: inset 0 -2px 0 var(--re-accent);
}

.re-navbar .navbar-dropdown {
  border-top: 2px solid var(--re-accent);
  box-shadow: 0 8px 24px rgba(16, 24, 40, 0.12);
}

.re-navbar .navbar-dropdown .navbar-item {
  padding-right: 2.5rem;
}

.re-navbar .navbar-dropdown .navbar-divider {
  margin: 0.35rem 0;
}

.re-nav-trophy {
  margin-right: 0.35rem;
}

/* Small "external link" affordance inside dropdowns */
.re-nav-ext::after {
  content: "\2197";
  font-size: 0.8em;
  margin-left: 0.35rem;
  color: var(--re-muted);
}

/* ------------------------------ Page header ------------------------------ */

.re-page-hero {
  background: linear-gradient(180deg, var(--re-surface-alt) 0%, var(--re-surface) 100%);
  border-bottom: 1px solid var(--re-line);
  padding: 3.5rem 1.5rem 3rem;
}

.re-eyebrow {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--re-accent);
  background: rgba(50, 115, 220, 0.09);
  border-radius: 999px;
  padding: 0.35rem 0.85rem;
  margin-bottom: 1rem;
}

.re-page-title {
  font-size: 2.6rem;
  line-height: 1.15;
  font-weight: 700;
  color: var(--re-ink);
  margin-bottom: 0.9rem;
}

.re-page-lede {
  font-size: 1.12rem;
  color: #40464f;
  max-width: 54rem;
}

/* --------------------------- Section scaffolding --------------------------- */

.re-section-label {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  border-bottom: 1px solid var(--re-line);
  padding-bottom: 0.6rem;
  margin-bottom: 1.6rem;
}

.re-section-label .re-num {
  font-variant-numeric: tabular-nums;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--re-accent);
  letter-spacing: 0.06em;
}

/* Anchored headings clear the fixed navbar */
.re-anchor {
  scroll-margin-top: 4.5rem;
}

/* ------------------------------- Timeline ------------------------------- */

.re-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 2px solid var(--re-line);
}

.re-timeline > li {
  position: relative;
  padding: 0 0 1.6rem 1.6rem;
}

.re-timeline > li:last-child {
  padding-bottom: 0;
}

.re-timeline > li::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 0.45rem;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--re-surface);
  border: 2px solid var(--re-line);
}

.re-timeline > li.is-live::before {
  background: var(--re-accent);
  border-color: var(--re-accent);
  box-shadow: 0 0 0 4px rgba(50, 115, 220, 0.16);
}

.re-timeline .re-tl-date {
  display: block;
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  color: var(--re-ink);
}

.re-timeline .re-tl-what {
  color: var(--re-muted);
  font-size: 0.95rem;
}

.re-tba {
  font-style: italic;
  color: var(--re-muted);
  font-weight: 600;
}

/* -------------------------------- Prizes -------------------------------- */

.re-prize {
  height: 100%;
  border: 1px solid var(--re-line);
  border-radius: 12px;
  background: var(--re-surface);
  padding: 1.4rem 1.2rem;
  text-align: center;
}

.re-prize.is-first {
  border-color: rgba(184, 134, 11, 0.45);
  background: linear-gradient(180deg, rgba(184, 134, 11, 0.07), var(--re-surface));
}

.re-prize .re-prize-rank {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--re-muted);
}

.re-prize .re-prize-amount {
  font-size: 1.85rem;
  font-weight: 700;
  color: var(--re-ink);
  margin: 0.35rem 0 0.2rem;
  font-variant-numeric: tabular-nums;
}

.re-prize .re-prize-note {
  font-size: 0.88rem;
  color: var(--re-muted);
}

/* -------------------------------- Callouts -------------------------------- */

.re-callout {
  border-left: 4px solid var(--re-accent);
  background: var(--re-surface-alt);
  border-radius: 0 8px 8px 0;
  padding: 1rem 1.2rem;
  margin: 1.5rem 0;
}

.re-callout.is-warning {
  border-left-color: #d98924;
  background: #fdf7ee;
}

.re-callout.is-danger {
  border-left-color: var(--re-danger);
  background: #fdf1f0;
}

.re-callout .re-callout-title {
  font-weight: 700;
  color: var(--re-ink);
  margin-bottom: 0.3rem;
}

.re-callout p:last-child {
  margin-bottom: 0;
}

/* --------------------------- Snapshot / spec table --------------------------- */

.re-spec {
  width: 100%;
  border-collapse: collapse;
  margin: 0;
  font-size: 0.97rem;
}

.re-spec th,
.re-spec td {
  border: 0;
  border-bottom: 1px solid var(--re-line);
  padding: 0.75rem 0.9rem;
  text-align: left;
  vertical-align: top;
}

.re-spec th {
  width: 34%;
  background: transparent;
  font-weight: 600;
  color: var(--re-muted);
  white-space: nowrap;
}

.re-spec tr:last-child th,
.re-spec tr:last-child td {
  border-bottom: 0;
}

/* Data tables on challenge pages */
.re-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
}

.re-table th,
.re-table td {
  border: 0;
  border-bottom: 1px solid var(--re-line);
  padding: 0.6rem 0.75rem;
  text-align: left;
}

.re-table thead th {
  background: var(--re-surface-alt);
  color: var(--re-ink);
  font-weight: 600;
  white-space: nowrap;
  border-bottom: 2px solid var(--re-line);
}

.re-table tbody tr:hover {
  background: var(--re-surface-alt);
}

.re-table code {
  font-size: 0.88em;
}

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

.re-feature {
  height: 100%;
  border: 1px solid var(--re-line);
  border-radius: 12px;
  padding: 1.3rem;
  background: var(--re-surface);
}

.re-feature .re-feature-icon {
  width: 2.3rem;
  height: 2.3rem;
  border-radius: 8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(50, 115, 220, 0.1);
  color: var(--re-accent);
  margin-bottom: 0.75rem;
}

.re-feature h4 {
  font-weight: 700;
  color: var(--re-ink);
  margin-bottom: 0.4rem;
}

.re-feature p,
.re-feature ul {
  color: #4a5160;
  font-size: 0.94rem;
  margin-bottom: 0;
}

/* ------------------------------- Steps list ------------------------------- */

.re-steps {
  counter-reset: re-step;
  list-style: none;
  margin: 0;
  padding: 0;
}

.re-steps > li {
  counter-increment: re-step;
  position: relative;
  padding-left: 3rem;
  margin-bottom: 1.5rem;
}

.re-steps > li::before {
  content: counter(re-step);
  position: absolute;
  left: 0;
  top: -0.1rem;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background: var(--re-accent);
  color: #fff;
  font-weight: 700;
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.re-steps > li > strong:first-child {
  display: block;
  color: var(--re-ink);
}

/* ------------------------------ Code blocks ------------------------------ */

.re-code {
  background: #1f2430;
  color: #e6e9f0;
  border-radius: 10px;
  padding: 1rem 1.2rem;
  overflow-x: auto;
  font-size: 0.87rem;
  line-height: 1.55;
  margin: 1rem 0;
}

.re-code code {
  background: transparent;
  color: inherit;
  padding: 0;
  font-size: inherit;
  white-space: pre;
}

.re-inline-code {
  background: var(--re-surface-alt);
  border: 1px solid var(--re-line);
  border-radius: 4px;
  padding: 0.1rem 0.35rem;
  font-size: 0.88em;
  color: #c7254e;
}

/* --------------------------------- Misc --------------------------------- */

.re-tag-pill {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  border-radius: 999px;
  padding: 0.2rem 0.6rem;
  background: var(--re-surface-alt);
  color: var(--re-muted);
  border: 1px solid var(--re-line);
}

.re-tag-pill.is-live {
  background: rgba(39, 174, 96, 0.12);
  color: #1e8449;
  border-color: rgba(39, 174, 96, 0.3);
}

.re-toc {
  border: 1px solid var(--re-line);
  border-radius: 12px;
  background: var(--re-surface-alt);
  padding: 1.1rem 1.3rem;
}

.re-toc ol {
  margin: 0.5rem 0 0 1.1rem;
  font-size: 0.94rem;
}

.re-toc li {
  margin-bottom: 0.3rem;
}

.re-cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1.6rem;
}

.re-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.1rem;
  border-radius: 6px;
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid var(--re-accent);
  background: var(--re-accent);
  color: #fff;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.re-btn:hover {
  background: var(--re-accent-dark);
  border-color: var(--re-accent-dark);
  color: #fff;
}

.re-btn.is-ghost {
  background: transparent;
  color: var(--re-accent);
}

.re-btn.is-ghost:hover {
  background: rgba(50, 115, 220, 0.08);
  color: var(--re-accent-dark);
}

@media screen and (max-width: 768px) {
  .re-page-title {
    font-size: 1.95rem;
  }
  .re-page-hero {
    padding: 2.5rem 1rem 2rem;
  }
  .re-spec th {
    width: auto;
    white-space: normal;
  }
}

/* ---------------------- Homepage challenge banner ---------------------- */

.re-challenge-banner {
  border: 1px solid rgba(184, 134, 11, 0.35);
  border-left: 5px solid var(--re-gold);
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(184, 134, 11, 0.07), rgba(50, 115, 220, 0.05));
  padding: 1.8rem 2rem;
}

.re-challenge-banner .re-eyebrow {
  color: var(--re-gold);
  background: rgba(184, 134, 11, 0.12);
}

.re-challenge-banner p {
  color: #434a55;
  max-width: 62rem;
}

@media screen and (max-width: 768px) {
  .re-challenge-banner {
    padding: 1.3rem 1.2rem;
  }
}