:root {
  --roadmap-bg: #f6f9ff;
  --roadmap-card: #ffffff;
  --roadmap-border: rgba(37, 99, 235, 0.18);
  --roadmap-ink: #1e3a5f;
  --roadmap-muted: #58708b;
}

.roadmap-page {
  font-family: 'Manrope', 'Zen Kaku Gothic New', sans-serif;
  background: linear-gradient(180deg, #f8fbff 0%, #edf4fb 100%);
  color: var(--roadmap-ink);
}

.roadmap-main {
  padding-top: 72px;
  min-height: calc(100vh - 140px);
}

.roadmap-shell {
  max-width: 1120px;
  margin: 0 auto;
  padding: 28px 24px 80px;
}

.roadmap-intro {
  margin-bottom: 18px;
}

.roadmap-intro h1 {
  margin: 0 0 6px;
  font-size: clamp(1.7rem, 2.7vw, 2.3rem);
}

.roadmap-intro p {
  margin: 0;
  color: var(--roadmap-muted);
}

.roadmap-status {
  margin-top: 10px;
  color: var(--roadmap-muted);
}

.roadmap-status[data-tone='error'] {
  color: #b91c1c;
}

.roadmap-page-grid {
  margin-top: 18px;
  display: grid;
  gap: 16px;
}

.roadmap-page-card {
  background: var(--roadmap-card);
  border: 1px solid var(--roadmap-border);
  border-radius: 18px;
  padding: 18px;
}

.roadmap-page-card-head {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  align-items: flex-start;
}

.roadmap-page-card-head h2 {
  margin: 0 0 6px;
}

.roadmap-page-card-head p {
  margin: 0;
  color: var(--roadmap-muted);
}

.roadmap-page-metrics {
  min-width: 240px;
  text-align: right;
}

.roadmap-page-metrics p {
  margin: 0 0 4px;
  font-size: 0.9rem;
}

.roadmap-page-meter {
  width: 100%;
  height: 10px;
  margin-top: 10px;
  border-radius: 999px;
  overflow: hidden;
  background: rgba(148, 163, 184, 0.2);
}

.roadmap-page-meter > span {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, #2563eb, #60a5fa);
}

.roadmap-page-sections {
  margin-top: 14px;
  display: grid;
  gap: 12px;
}

.roadmap-page-section {
  border: 1px solid rgba(148, 163, 184, 0.28);
  border-radius: 14px;
  padding: 12px 14px;
  background: var(--roadmap-bg);
}

.roadmap-page-section-head {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  align-items: baseline;
}

.roadmap-page-section-head h3 {
  margin: 0;
  font-size: 1rem;
}

.roadmap-page-status {
  font-size: 0.8rem;
  font-weight: 700;
  border-radius: 999px;
  padding: 4px 9px;
}

.roadmap-page-status[data-status='completed'] {
  background: rgba(16, 185, 129, 0.18);
  color: #047857;
}

.roadmap-page-status[data-status='in_progress'] {
  background: rgba(59, 130, 246, 0.17);
  color: #1d4ed8;
}

.roadmap-page-status[data-status='not_started'] {
  background: rgba(148, 163, 184, 0.22);
  color: #475569;
}

.roadmap-page-section-summary {
  margin: 6px 0 8px;
  color: var(--roadmap-muted);
  font-size: 0.92rem;
}

.roadmap-page-list {
  margin: 0 0 8px;
  padding-left: 20px;
}

.roadmap-page-list li {
  margin-bottom: 4px;
}

.roadmap-page-list a {
  color: #1e40af;
  text-decoration: none;
}

.roadmap-page-resources {
  margin-top: 6px;
  border-top: 1px solid rgba(148, 163, 184, 0.3);
  padding-top: 8px;
}

.roadmap-page-resources-title {
  margin: 0 0 6px;
  font-size: 0.84rem;
  color: var(--roadmap-muted);
  font-weight: 700;
}

.roadmap-practice-progress-wrap {
  margin-top: 8px;
  display: grid;
  gap: 8px;
}

.roadmap-practice-progress {
  border: 1px dashed rgba(59, 130, 246, 0.35);
  border-radius: 10px;
  background: #fff;
}

.roadmap-practice-progress > summary {
  cursor: pointer;
  padding: 8px 10px;
  font-size: 0.9rem;
  font-weight: 700;
  color: #1f4d8f;
}

.roadmap-practice-progress-body {
  padding: 0 10px 10px;
}

.roadmap-problem-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.roadmap-problem-bucket {
  border: 1px solid rgba(148, 163, 184, 0.24);
  border-radius: 8px;
  padding: 8px;
  background: #f8fbff;
}

.roadmap-problem-bucket h5 {
  margin: 0 0 6px;
  font-size: 0.84rem;
}

.roadmap-problem-empty {
  margin: 0;
  color: #64748b;
  font-size: 0.82rem;
}

.roadmap-problem-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 6px;
}

.roadmap-problem-list li {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  align-items: center;
}

.roadmap-problem-list a {
  color: #1e3a8a;
  font-size: 0.84rem;
  text-decoration: none;
}

.roadmap-problem-state {
  font-size: 0.74rem;
  border-radius: 999px;
  padding: 2px 8px;
  white-space: nowrap;
}

.roadmap-problem-state[data-state='started'] {
  background: rgba(16, 185, 129, 0.18);
  color: #047857;
}

.roadmap-problem-state[data-state='unattempted'] {
  background: rgba(148, 163, 184, 0.25);
  color: #475569;
}

/* ── Unified Problem List (2-column layout) ── */
.roadmap-problem-unified-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

@media (max-width: 768px) {
  .roadmap-problem-unified-list {
    grid-template-columns: 1fr;
  }
}

.roadmap-problem-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 8px 12px;
  border: 1px solid rgba(148, 163, 184, 0.2);
  border-radius: 6px;
  background: #ffffff;
  transition: background-color 0.15s, border-color 0.15s;
}

.roadmap-problem-item:hover {
  background: #f8fbff;
  border-color: rgba(37, 99, 235, 0.3);
}

.roadmap-problem-link {
  color: #1e3a8a;
  font-size: 0.9rem;
  text-decoration: none;
  flex: 1;
  font-weight: 500;
}

.roadmap-problem-link:hover {
  color: #1e40af;
  text-decoration: underline;
}

.roadmap-problem-badge {
  font-size: 0.76rem;
  font-weight: 600;
  border-radius: 12px;
  padding: 3px 10px;
  white-space: nowrap;
  text-transform: none;
}

.roadmap-problem-badge[data-state='started'] {
  background: rgba(16, 185, 129, 0.15);
  color: #047857;
}

.roadmap-problem-badge[data-state='unattempted'] {
  background: rgba(148, 163, 184, 0.2);
  color: #475569;
}

/* ── Curriculum Progress Indicators ── */
.roadmap-curriculum-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  margin-bottom: 6px;
}

.roadmap-curriculum-link {
  color: #1e40af;
  text-decoration: none;
  font-size: 0.92rem;
  flex: 1;
}

.roadmap-curriculum-link:hover {
  text-decoration: underline;
}

.roadmap-curriculum-badge {
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 10px;
  padding: 2px 8px;
  white-space: nowrap;
}

.roadmap-curriculum-badge[data-status='completed'] {
  background: rgba(16, 185, 129, 0.15);
  color: #047857;
}

.roadmap-curriculum-badge[data-status='not_completed'] {
  background: rgba(148, 163, 184, 0.2);
  color: #475569;
}

.roadmap-page-resource {
  display: flex;
  gap: 10px;
  align-items: center;
  margin-bottom: 6px;
}

.roadmap-page-resource a {
  color: #1e40af;
  text-decoration: none;
  font-size: 0.92rem;
}

.roadmap-page-resource-spacer {
  width: 14px;
  display: inline-block;
}

.roadmap-gate {
  margin-top: 16px;
  background: var(--roadmap-card);
  border: 1px solid var(--roadmap-border);
  border-radius: 16px;
  padding: 22px;
  text-align: center;
}

.roadmap-gate h2 {
  margin: 0 0 8px;
}

.roadmap-gate p {
  margin: 0 0 12px;
  color: var(--roadmap-muted);
}

.roadmap-gate-actions {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ── Tabs ── */
.roadmap-tabs-container {
  margin: 16px 0 0;
}

.roadmap-tabs {
  display: flex;
  border-bottom: 2px solid var(--roadmap-border);
}

.roadmap-tab {
  padding: 10px 22px;
  background: none;
  border: none;
  border-bottom: 3px solid transparent;
  margin-bottom: -2px;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--roadmap-muted);
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s;
  font-family: inherit;
}

.roadmap-tab.is-active {
  color: #2563eb;
  border-bottom-color: #2563eb;
}

.roadmap-tab:hover:not(.is-active) {
  color: var(--roadmap-ink);
}

@media (max-width: 900px) {
  .roadmap-page-card-head {
    flex-direction: column;
  }

  .roadmap-page-metrics {
    min-width: 0;
    text-align: left;
  }

  .roadmap-problem-columns {
    grid-template-columns: 1fr;
  }
}