/* ── Design Tokens ──────────────────────────────────────────────────── */
:root {
  --rm-accent: #94a3b8;
  --rm-accent-rgb: 148, 163, 184;
  --rm-accent-muted: rgba(148, 163, 184, 0.08);
  --rm-accent-border: rgba(148, 163, 184, 0.12);
  --rm-accent-border-hover: rgba(148, 163, 184, 0.22);
  --rm-accent-glow: rgba(148, 163, 184, 0.06);

  --rm-bg-base: #0a0a0f;
  --rm-bg-surface: #0f0f15;
  --rm-bg-card: #131319;
  --rm-bg-elevated: #1a1a22;

  --rm-text-primary: #e2e2e8;
  --rm-text-secondary: #6b6b80;
  --rm-text-muted: #4a4a5c;

  --rm-border: rgba(255, 255, 255, 0.06);

  --rm-radius-sm: 8px;
  --rm-radius-md: 12px;
  --rm-radius-lg: 16px;
  --rm-radius-xl: 20px;

  --rm-transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ── Back Button ───────────────────────────────────────────────────── */
.rm-back-btn {
  position: absolute;
  top: 2rem;
  left: 1.5rem;
  z-index: 10;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55rem 1rem 0.55rem 0.85rem;
  background: var(--rm-bg-card);
  border: 1px solid var(--rm-border);
  border-radius: 100px;
  color: var(--rm-text-muted);
  font-family: 'Inter', sans-serif;
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.2s ease;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.rm-back-btn i {
  font-size: 0.85rem;
  transition: transform 0.2s ease;
}

.rm-back-btn span {
  font-weight: 500;
}

.rm-back-btn:hover {
  border-color: rgba(248, 113, 113, 0.4);
  color: #f87171;
  background: rgba(248, 113, 113, 0.08);
}

.rm-back-btn:hover i {
  transform: translateX(-3px);
}

.rm-back-btn:focus-visible {
  outline: 2px solid #f87171;
  outline-offset: 2px;
}

/* ── Base ───────────────────────────────────────────────────────────── */
body {
  background: var(--rm-bg-base);
  color: var(--rm-text-primary);
  font-family: 'Poppins', sans-serif;
  margin: 0;
  min-height: 100vh;
}

.roadmap-hub-container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ── Header ─────────────────────────────────────────────────────────── */
.hub-header {
  position: relative;
  text-align: center;
  padding: 3.5rem 1.5rem 2rem;
  margin-bottom: 1.5rem;
}

.hub-header::before {
  content: '';
  position: absolute;
  top: -40px;
  left: 50%;
  transform: translateX(-50%);
  width: 700px;
  height: 400px;
  background: radial-gradient(
    ellipse 60% 50% at 50% 40%,
    rgba(255, 255, 255, 0.015) 0%,
    transparent 70%
  );
  pointer-events: none;
  z-index: 0;
}

.hub-title {
  position: relative;
  z-index: 1;
  font-family: 'JetBrains Mono', 'Orbitron', monospace;
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 700;
  letter-spacing: -0.5px;
  color: var(--rm-text-primary);
  margin: 0 0 0.75rem;
  line-height: 1.2;
}

.hub-subtitle {
  position: relative;
  z-index: 1;
  color: var(--rm-text-secondary);
  font-size: 0.95rem;
  line-height: 1.65;
  max-width: 540px;
  margin: 0 auto;
}

/* ── Tab Navigation ─────────────────────────────────────────────────── */
.hub-tab-nav {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 2rem;
  padding: 4px;
  background: var(--rm-bg-surface);
  border: 1px solid var(--rm-border);
  border-radius: 100px;
  width: fit-content;
  margin-left: auto;
  margin-right: auto;
}

.hub-tab {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 20px;
  border: 1px solid transparent;
  border-radius: 100px;
  background: transparent;
  color: var(--rm-text-muted);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.2px;
  cursor: pointer;
  transition: all var(--rm-transition);
  white-space: nowrap;
}

.hub-tab:hover {
  color: var(--rm-text-secondary);
  background: rgba(var(--rm-accent-rgb), 0.04);
}

.hub-tab.active {
  background: rgba(var(--rm-accent-rgb), 0.12);
  color: var(--rm-accent);
  border-color: rgba(var(--rm-accent-rgb), 0.18);
}

.hub-tab.active:hover {
  background: rgba(var(--rm-accent-rgb), 0.16);
}

.hub-tab-icon {
  display: inline-flex;
  font-size: 0.8rem;
  line-height: 1;
}

/* ── Main Content ───────────────────────────────────────────────────── */
.hub-main {
  display: block;
}

/* ── Badges (override global gamification .badge) ───────────────────── */
.roadmap-hub-container .badge,
.timeline-footer .badge {
  width: auto !important;
  height: auto !important;
  aspect-ratio: auto !important;
  border-radius: 3px !important;
  background-color: initial !important;
  background-image: none !important;
  display: inline !important;
  align-items: initial !important;
  justify-content: initial !important;
  font-size: 0.7rem;
  font-weight: 500;
  padding: 1px 5px;
  letter-spacing: 0.2px;
  font-family: 'JetBrains Mono', monospace;
  text-transform: uppercase;
  line-height: 1.4;
  position: static !important;
  cursor: default !important;
  justify-self: initial !important;
}

.badge-easy {
  background: rgba(16, 185, 129, 0.08) !important;
  color: #6ee7b7;
  border: 1px solid rgba(16, 185, 129, 0.12);
}

.badge-medium {
  background: rgba(245, 158, 11, 0.08) !important;
  color: #fbbf24;
  border: 1px solid rgba(245, 158, 11, 0.12);
}

.badge-hard {
  background: rgba(239, 68, 68, 0.08) !important;
  color: #fca5a5;
  border: 1px solid rgba(239, 68, 68, 0.12);
}

/* ── Detail Panel ───────────────────────────────────────────────────── */
.hub-detail {
  background: var(--rm-bg-surface);
  border: 1px solid var(--rm-border);
  border-radius: var(--rm-radius-xl);
  padding: 32px;
  min-height: 500px;
  position: relative;
}

.detail-header {
  border-bottom: 1px solid var(--rm-border);
  padding-bottom: 24px;
  margin-bottom: 28px;
}

.detail-header h2 {
  font-family: 'Poppins', sans-serif;
  font-size: 1.6rem;
  font-weight: 700;
  margin: 0 0 8px 0;
  color: var(--rm-text-primary);
  letter-spacing: -0.3px;
}

.detail-header p {
  margin: 0 0 20px 0;
  color: var(--rm-text-secondary);
  font-size: 0.9rem;
  line-height: 1.65;
}

.detail-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px;
}

.detail-meta > span {
  font-size: 0.82rem;
  color: var(--rm-accent);
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  background: rgba(var(--rm-accent-rgb), 0.06);
  border: 1px solid rgba(var(--rm-accent-rgb), 0.1);
  border-radius: 100px;
}

/* ── Search ─────────────────────────────────────────────────────────── */
.search-box {
  position: relative;
  width: 260px;
}

.search-box i {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--rm-text-muted);
  font-size: 0.8rem;
  pointer-events: none;
}

.search-box input {
  width: 100%;
  background: var(--rm-bg-base);
  border: 1px solid var(--rm-border);
  border-radius: 100px;
  padding: 9px 16px 9px 38px;
  color: var(--rm-text-primary);
  font-family: inherit;
  font-size: 0.82rem;
  transition: all var(--rm-transition);
}

.search-box input::placeholder {
  color: var(--rm-text-muted);
}

.search-box input:focus {
  outline: none;
  border-color: rgba(var(--rm-accent-rgb), 0.3);
  box-shadow:
    0 0 0 3px rgba(var(--rm-accent-rgb), 0.06),
    0 2px 12px rgba(0, 0, 0, 0.15);
}

/* ── View Toggle ────────────────────────────────────────────────────── */
.view-toggle-wrapper {
  flex-shrink: 0;
}

#viewToggle.view-toggle {
  display: flex;
  background: var(--rm-bg-base);
  border: 1px solid var(--rm-border);
  border-radius: 100px;
  overflow: hidden;
  margin: 0;
}

#viewToggle .view-toggle-btn {
  border: none;
  background: transparent;
  color: var(--rm-text-muted);
  padding: 7px 16px;
  font-size: 0.78rem;
  font-family: 'JetBrains Mono', monospace;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--rm-transition);
  display: flex;
  align-items: center;
  gap: 6px;
  letter-spacing: 0.2px;
}

#viewToggle .view-toggle-btn:hover {
  color: var(--rm-text-secondary);
  background: rgba(var(--rm-accent-rgb), 0.04);
}

#viewToggle .view-toggle-btn.active {
  background: rgba(var(--rm-accent-rgb), 0.12);
  color: var(--rm-accent);
  border: 1px solid rgba(var(--rm-accent-rgb), 0.18);
  border-radius: 100px;
}

#viewToggle .view-toggle-btn.active:hover {
  background: rgba(var(--rm-accent-rgb), 0.16);
}

#viewToggle .view-toggle-btn:first-child {
  border-right: none;
}

#viewToggle .view-toggle-btn:first-child.active {
  border-right: none;
}

/* ── Timeline ───────────────────────────────────────────────────────── */
.timeline {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.timeline-item {
  display: flex;
  gap: 16px;
  position: relative;
  transition: all var(--rm-transition);
  padding: 6px;
  border-radius: var(--rm-radius-lg);
}

.timeline-item:hover {
  background: rgba(var(--rm-accent-rgb), 0.02);
}

.timeline-icon-box {
  width: 42px;
  height: 42px;
  border-radius: var(--rm-radius-md);
  background: rgba(var(--rm-accent-rgb), 0.06);
  border: 1px solid rgba(var(--rm-accent-rgb), 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--rm-accent);
  font-size: 0.95rem;
  flex-shrink: 0;
  transition: all var(--rm-transition);
  margin-top: 4px;
}

.timeline-item:hover .timeline-icon-box {
  background: rgba(var(--rm-accent-rgb), 0.1);
  border-color: rgba(var(--rm-accent-rgb), 0.16);
}

.timeline-content {
  background: var(--rm-bg-card);
  border: 1px solid var(--rm-border);
  border-radius: var(--rm-radius-md);
  padding: 18px 20px;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: all var(--rm-transition);
}

.timeline-item:hover .timeline-content {
  border-color: var(--rm-accent-border-hover);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

.timeline-content h3 {
  margin: 0;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--rm-text-primary);
  letter-spacing: -0.2px;
}

.timeline-content p {
  margin: 0;
  color: var(--rm-text-secondary);
  font-size: 0.82rem;
  line-height: 1.55;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.timeline-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 4px;
}

.timeline-footer .badge {
  text-transform: capitalize;
}

.time-estimate {
  font-size: 0.72rem;
  color: var(--rm-text-muted);
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 4px;
}

/* ── View Details Button ────────────────────────────────────────────── */
.timeline-footer .btn-sm {
  background: transparent !important;
  border: 1px solid var(--rm-border) !important;
  color: var(--rm-text-secondary) !important;
  box-shadow: none !important;
  padding: 4px 10px;
  font-size: 0.65rem;
  font-family: 'JetBrains Mono', monospace;
  font-weight: 500;
  border-radius: 4px;
  cursor: pointer;
  transition: all var(--rm-transition);
  display: inline-flex;
  align-items: center;
  gap: 5px;
  letter-spacing: 0.2px;
}

.timeline-footer .btn-sm:hover {
  color: var(--rm-text-primary) !important;
  border-color: rgba(255, 255, 255, 0.12) !important;
  transform: none !important;
}

/* ── Tree View ──────────────────────────────────────────────────────── */
.tree-view-container {
  min-height: 400px;
}

/* ── Utilities ──────────────────────────────────────────────────────── */
.hidden {
  display: none !important;
}

/* ── Responsive ─────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .rm-back-btn {
    top: 1rem;
    left: 0.75rem;
    padding: 0.45rem 0.75rem 0.45rem 0.65rem;
    font-size: 0.8rem;
  }

  .rm-back-btn span {
    display: none;
  }

  .hub-tab-nav {
    border-radius: var(--rm-radius-lg);
    padding: 4px;
    gap: 4px;
    width: 100%;
  }

  .hub-tab {
    flex: 1;
    justify-content: center;
    padding: 8px 12px;
    font-size: 0.72rem;
  }

  .hub-detail {
    padding: 24px;
    border-radius: var(--rm-radius-lg);
  }

  .detail-header h2 {
    font-size: 1.3rem;
  }

  .detail-meta {
    flex-direction: column;
    align-items: stretch;
  }

  .search-box {
    width: 100%;
  }

  .view-toggle-wrapper {
    display: flex;
    justify-content: center;
  }
}

@media (max-width: 600px) {
  .roadmap-hub-container {
    padding: 0 14px;
  }

  .hub-header {
    padding: 2rem 0.5rem 1.5rem;
    margin-bottom: 1rem;
  }

  .hub-title {
    font-size: 1.4rem;
  }

  .hub-subtitle {
    font-size: 0.85rem;
  }

  .hub-detail {
    padding: 18px;
  }

  .timeline-item {
    gap: 10px;
    padding: 4px;
  }

  .timeline-icon-box {
    width: 36px;
    height: 36px;
    font-size: 0.85rem;
  }

  .timeline-content {
    padding: 14px 16px;
  }

  .timeline-content h3 {
    font-size: 0.88rem;
  }

  .timeline-footer {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }
}

/* ── Reduced Motion ─────────────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  .hub-tab,
  .timeline-item,
  .timeline-content,
  .timeline-icon-box,
  .search-box input,
  #viewToggle .view-toggle-btn {
    transition: none;
  }

  .timeline-item:hover,
  .timeline-content:hover,
  .timeline-footer .btn-sm:hover {
    transform: none;
  }
}

/* ── Resume-Tailored Roadmap & Recommendation Badges ────────────────── */
.recommendation-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.2rem 0.65rem;
  background: linear-gradient(135deg, #8b5cf6, #ec4899);
  color: #ffffff;
  font-size: 0.72rem;
  font-weight: 600;
  border-radius: 999px;
  box-shadow: 0 2px 8px rgba(236, 72, 153, 0.35);
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.recommendation-badge i {
  font-size: 0.75rem;
}

.recommended-step {
  border: 1px solid rgba(236, 72, 153, 0.45) !important;
  background: linear-gradient(
    145deg,
    rgba(236, 72, 153, 0.05),
    rgba(139, 92, 246, 0.05)
  ) !important;
  box-shadow: 0 4px 16px rgba(236, 72, 153, 0.12) !important;
}

.tailored-roadmap-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 1.25rem;
  margin-bottom: 1.5rem;
  background: rgba(19, 19, 25, 0.85);
  border: 1px solid rgba(236, 72, 153, 0.35);
  border-left: 4px solid #ec4899;
  border-radius: 12px;
  backdrop-filter: blur(10px);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
  flex-wrap: wrap;
}

.tailored-roadmap-banner .banner-content {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.tailored-roadmap-banner .banner-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.25rem 0.65rem;
  background: rgba(236, 72, 153, 0.15);
  color: #f472b6;
  font-weight: 600;
  font-size: 0.78rem;
  border-radius: 6px;
  border: 1px solid rgba(236, 72, 153, 0.3);
}

.tailored-roadmap-banner .banner-info {
  font-size: 0.88rem;
  color: var(--rm-text-primary, #e2e2e8);
}