/* ==============================
   Hub V2 — Scoped under .hub-v2
   All selectors MUST be inside .hub-v2 to avoid
   affecting existing pages.
   ============================== */

/* ---------- Shared ---------- */
.hub-v2 {
  --hub-accent: var(--md-primary-fg-color, #4051b5);
  --hub-accent-light: var(--md-primary-fg-color--light, #5c6bc0);
  --hub-surface: var(--md-default-bg-color, #fff);
  --hub-on-surface: var(--md-default-fg-color, #1a1a2e);
  --hub-border: var(--md-default-fg-color--lightest, #e0e0e0);
  --hub-radius: 0.625rem;
  --hub-shadow: 0 2px 8px rgba(0,0,0,.08);
  --hub-gap: 1.25rem;
}

/* Dark mode overrides */
[data-md-color-scheme="slate"] .hub-v2 {
  --hub-shadow: 0 2px 8px rgba(0,0,0,.25);
}

.hub-v2 .hub-intro {
  font-size: 1.1rem;
  line-height: 1.7;
  margin-bottom: 2rem;
  color: var(--hub-on-surface);
}

.hub-v2 .hub-intro strong {
  color: var(--hub-accent);
}

/* ---------- Section Headers ---------- */
.hub-v2 .hub-section-title {
  font-size: 1.35rem;
  font-weight: 700;
  margin: 2.5rem 0 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--hub-accent);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* ==============================
   P1: Tab + Card Layout
   ============================== */

/* Card grid */
.hub-v2 .hub-card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--hub-gap);
  margin: 1.25rem 0 2rem;
}

.hub-v2 .hub-card {
  position: relative;
  background: var(--hub-surface);
  border: 1px solid var(--hub-border);
  border-radius: var(--hub-radius);
  padding: 1.25rem;
  box-shadow: var(--hub-shadow);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.hub-v2 .hub-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(0,0,0,.12);
}

[data-md-color-scheme="slate"] .hub-v2 .hub-card:hover {
  box-shadow: 0 4px 16px rgba(0,0,0,.35);
}

.hub-v2 .hub-card__title {
  font-size: 1rem;
  font-weight: 600;
  margin: 0;
  line-height: 1.4;
}

.hub-v2 .hub-card__title a {
  color: var(--hub-on-surface);
  text-decoration: none;
}

.hub-v2 .hub-card__title a:hover {
  color: var(--hub-accent);
}

/* Stretch link to cover entire card */
.hub-v2 .hub-card__title a::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: var(--hub-radius);
}

.hub-v2 .hub-card__desc {
  font-size: 0.875rem;
  color: var(--md-default-fg-color--light, #555);
  line-height: 1.5;
  margin: 0;
}

.hub-v2 .hub-card__meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.75rem;
  color: var(--md-default-fg-color--lighter, #888);
  margin-top: auto;
  padding-top: 0.5rem;
  border-top: 1px solid var(--hub-border);
}

.hub-v2 .hub-card__badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.hub-v2 .hub-card__badge--beginner {
  background: #e8f5e9;
  color: #2e7d32;
}

.hub-v2 .hub-card__badge--intermediate {
  background: #e3f2fd;
  color: #1565c0;
}

.hub-v2 .hub-card__badge--advanced {
  background: #fce4ec;
  color: #c62828;
}

[data-md-color-scheme="slate"] .hub-v2 .hub-card__badge--beginner {
  background: rgba(46,125,50,.2);
  color: #81c784;
}

[data-md-color-scheme="slate"] .hub-v2 .hub-card__badge--intermediate {
  background: rgba(21,101,192,.2);
  color: #64b5f6;
}

[data-md-color-scheme="slate"] .hub-v2 .hub-card__badge--advanced {
  background: rgba(198,40,40,.2);
  color: #ef9a9a;
}

/* Practitioner comment */
.hub-v2 .hub-comment {
  background: var(--md-admonition-bg-color, #f5f5f5);
  border-left: 3px solid var(--hub-accent);
  padding: 0.75rem 1rem;
  margin: 1rem 0;
  font-size: 0.9rem;
  border-radius: 0 var(--hub-radius) var(--hub-radius) 0;
  line-height: 1.6;
}

/* ==============================
   P2: Learning Path / Stepper
   ============================== */

.hub-v2 .learning-path {
  position: relative;
  padding: 1rem 0 1rem 2.5rem;
}

/* Vertical connector line */
.hub-v2 .learning-path::before {
  content: "";
  position: absolute;
  left: 1.1rem;
  top: 2.5rem;
  bottom: 2.5rem;
  width: 3px;
  background: linear-gradient(to bottom, var(--hub-accent), var(--hub-accent-light));
  border-radius: 2px;
}

.hub-v2 .lp-step {
  position: relative;
  margin-bottom: 2.5rem;
}

.hub-v2 .lp-step:last-child {
  margin-bottom: 0;
}

/* Step number circle */
.hub-v2 .lp-step__number {
  position: absolute;
  left: -2.5rem;
  top: 0;
  width: 2.2rem;
  height: 2.2rem;
  background: var(--hub-accent);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.95rem;
  z-index: 1;
  box-shadow: 0 2px 6px rgba(0,0,0,.15);
}

.hub-v2 .lp-step__title {
  font-size: 1.15rem;
  font-weight: 700;
  margin: 0 0 0.25rem;
  color: var(--hub-on-surface);
}

.hub-v2 .lp-step__subtitle {
  font-size: 0.85rem;
  color: var(--md-default-fg-color--light, #666);
  margin: 0 0 0.75rem;
}

.hub-v2 .lp-step__articles {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.hub-v2 .lp-step__articles li {
  background: var(--hub-surface);
  border: 1px solid var(--hub-border);
  border-radius: var(--hub-radius);
  padding: 0.75rem 1rem;
  transition: border-color 0.2s;
}

.hub-v2 .lp-step__articles li:hover {
  border-color: var(--hub-accent);
}

.hub-v2 .lp-step__articles a {
  font-weight: 500;
  text-decoration: none;
  color: var(--hub-on-surface);
}

.hub-v2 .lp-step__articles a:hover {
  color: var(--hub-accent);
}

.hub-v2 .lp-step__articles .lp-article-desc {
  display: block;
  font-size: 0.8rem;
  color: var(--md-default-fg-color--light, #666);
  margin-top: 0.15rem;
}

/* Shortcut link */
.hub-v2 .lp-shortcut {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin-top: 0.75rem;
  padding: 0.4rem 0.85rem;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--hub-accent);
  background: transparent;
  border: 1px dashed var(--hub-accent);
  border-radius: 999px;
  text-decoration: none;
  transition: background 0.2s, color 0.2s;
}

.hub-v2 .lp-shortcut:hover {
  background: var(--hub-accent);
  color: #fff;
}

/* ==============================
   P3: Magazine Layout
   ============================== */

/* Editor's Pick — hero card */
.hub-v2 .mag-hero {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--hub-gap);
  margin-bottom: 2rem;
}

.hub-v2 .mag-hero__card {
  background: linear-gradient(135deg, var(--hub-accent), var(--hub-accent-light));
  color: #fff;
  border-radius: var(--hub-radius);
  padding: 2rem 2.5rem;
  box-shadow: var(--hub-shadow);
  position: relative;
  overflow: hidden;
}

.hub-v2 .mag-hero__card::after {
  content: "";
  position: absolute;
  top: -30%;
  right: -10%;
  width: 200px;
  height: 200px;
  background: rgba(255,255,255,.08);
  border-radius: 50%;
}

.hub-v2 .mag-hero__label {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  opacity: 0.85;
  margin-bottom: 0.75rem;
}

.hub-v2 .mag-hero__title {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 0 0.5rem;
  line-height: 1.3;
}

.hub-v2 .mag-hero__title a {
  color: #fff;
  text-decoration: none;
}

.hub-v2 .mag-hero__title a:hover {
  text-decoration: underline;
}

.hub-v2 .mag-hero__excerpt {
  font-size: 0.95rem;
  opacity: 0.9;
  line-height: 1.6;
  margin-bottom: 1rem;
}

.hub-v2 .mag-hero__cta {
  display: inline-block;
  background: rgba(255,255,255,.2);
  color: #fff;
  padding: 0.5rem 1.25rem;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
  text-decoration: none;
  transition: background 0.2s;
}

.hub-v2 .mag-hero__cta:hover {
  background: rgba(255,255,255,.35);
}

/* Topic navigation buttons */
.hub-v2 .mag-topics {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.hub-v2 .mag-topic-btn {
  display: inline-block;
  padding: 0.45rem 1rem;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--hub-on-surface);
  background: var(--hub-surface);
  border: 1px solid var(--hub-border);
  border-radius: 999px;
  text-decoration: none;
  transition: all 0.2s;
}

.hub-v2 .mag-topic-btn:hover,
.hub-v2 .mag-topic-btn--active {
  background: var(--hub-accent);
  color: #fff;
  border-color: var(--hub-accent);
}

/* Article list — compact */
.hub-v2 .mag-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.hub-v2 .mag-list__item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  background: var(--hub-surface);
  border: 1px solid var(--hub-border);
  border-radius: var(--hub-radius);
  transition: border-color 0.2s;
}

.hub-v2 .mag-list__item:hover {
  border-color: var(--hub-accent);
}

.hub-v2 .mag-list__rank {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--hub-accent);
  min-width: 1.5rem;
  text-align: center;
  line-height: 1;
  padding-top: 0.15rem;
}

.hub-v2 .mag-list__content {
  flex: 1;
}

.hub-v2 .mag-list__title {
  font-weight: 600;
  margin: 0;
  line-height: 1.4;
}

.hub-v2 .mag-list__title a {
  color: var(--hub-on-surface);
  text-decoration: none;
}

.hub-v2 .mag-list__title a:hover {
  color: var(--hub-accent);
}

.hub-v2 .mag-list__desc {
  font-size: 0.8rem;
  color: var(--md-default-fg-color--light, #666);
  margin: 0.15rem 0 0;
}

/* Two-column layout for Most Read + Fresh */
.hub-v2 .mag-two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin: 1.5rem 0;
}

/* Update badge */
.hub-v2 .mag-update-badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.1rem 0.5rem;
  border-radius: 999px;
  background: #e8f5e9;
  color: #2e7d32;
  margin-left: 0.5rem;
}

[data-md-color-scheme="slate"] .hub-v2 .mag-update-badge {
  background: rgba(46,125,50,.2);
  color: #81c784;
}

/* ==============================
   Responsive
   ============================== */

/* Tablet */
@media (max-width: 768px) {
  .hub-v2 .hub-card-grid {
    grid-template-columns: 1fr 1fr;
  }

  .hub-v2 .mag-two-col {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .hub-v2 .mag-hero__card {
    padding: 1.5rem;
  }

  .hub-v2 .mag-hero__title {
    font-size: 1.25rem;
  }
}

/* Mobile */
@media (max-width: 480px) {
  .hub-v2 .hub-card-grid {
    grid-template-columns: 1fr;
  }

  .hub-v2 .learning-path {
    padding-left: 2rem;
  }

  .hub-v2 .lp-step__number {
    left: -2rem;
    width: 1.8rem;
    height: 1.8rem;
    font-size: 0.85rem;
  }

  .hub-v2 .learning-path::before {
    left: 0.8rem;
  }

  .hub-v2 .mag-hero__card {
    padding: 1.25rem;
  }

  .hub-v2 .mag-topics {
    gap: 0.35rem;
  }

  .hub-v2 .mag-topic-btn {
    font-size: 0.8rem;
    padding: 0.35rem 0.75rem;
  }
}

/* ==============================
   Popular Articles Tabs (hub-pop-tabs)
   ============================== */

.hub-v2 .hub-pop-tabs__labels {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  border-bottom: 2px solid var(--hub-border);
  margin-bottom: 1.25rem;
}

.hub-v2 .hub-pop-tabs__label {
  padding: 0.6rem 1.25rem;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--md-default-fg-color--light, #666);
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s;
  white-space: nowrap;
}

.hub-v2 .hub-pop-tabs__label:hover {
  color: var(--hub-accent);
}

.hub-v2 .hub-pop-tabs__label--active {
  color: var(--hub-accent);
  border-bottom-color: var(--hub-accent);
  font-weight: 600;
}

.hub-v2 .hub-pop-tabs__list {
  list-style: none;
  padding: 0;
  margin: 0;
  counter-reset: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.hub-v2 .hub-pop-tabs__item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.6rem 0.75rem;
  border-radius: var(--hub-radius);
  transition: background 0.15s;
}

.hub-v2 .hub-pop-tabs__item:hover {
  background: var(--md-default-fg-color--lightest, rgba(0,0,0,.04));
}

.hub-v2 .hub-pop-tabs__rank {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--hub-accent);
  min-width: 1.5rem;
  text-align: center;
  line-height: 1.4;
}

.hub-v2 .hub-pop-tabs__content {
  display: block;
  flex: 1;
  min-width: 0;
}

.hub-v2 .hub-pop-tabs__content a {
  font-weight: 500;
  text-decoration: none;
  color: var(--hub-on-surface);
}

.hub-v2 .hub-pop-tabs__content a:hover {
  color: var(--hub-accent);
}

.hub-v2 .hub-pop-tabs__desc {
  display: block;
  font-size: 0.8rem;
  color: var(--md-default-fg-color--light, #666);
  margin-top: 0.1rem;
}

.hub-v2 .hub-pop-tabs__desc::before {
  content: "— ";
}

/* ---------- Fresh (recent updates) list ---------- */

.hub-v2 .hub-fresh-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.hub-v2 .hub-fresh-item {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  padding: 0.4rem 0;
}

.hub-v2 .hub-fresh-date {
  font-size: 0.8rem;
  color: var(--md-default-fg-color--light, #888);
  white-space: nowrap;
  min-width: 6.5rem;
}

.hub-v2 .hub-fresh-item a {
  font-weight: 500;
  text-decoration: none;
  color: var(--hub-on-surface);
}

.hub-v2 .hub-fresh-item a:hover {
  color: var(--hub-accent);
}

/* ==============================
   Pillar card overrides (inside .hub-v2)
   ============================== */

.hub-v2 .pillar-card {
  padding: 1.2rem 1.4rem;
  min-height: 4.5rem;
}

.hub-v2 .pillar-icon {
  font-size: 2rem;
}

.hub-v2 .pillar-body strong {
  font-size: 1rem;
}

.hub-v2 .pillar-body span {
  font-size: 0.85rem;
}

/* ---------- Grid cards: full-card clickable hint ---------- */

.grid.cards > ul > li {
  transition: border-color 0.2s, box-shadow 0.2s;
}

.grid.cards > ul > li:hover {
  border-color: var(--md-primary-fg-color, #4051b5);
  box-shadow: 0 2px 12px rgba(0,0,0,.08);
}

/* ==============================
   Accessibility
   ============================== */

.hub-v2 .hub-card:focus-within {
  outline: 2px solid var(--hub-accent);
  outline-offset: 2px;
}

.hub-v2 .lp-step__articles li:focus-within {
  outline: 2px solid var(--hub-accent);
  outline-offset: 2px;
}

.hub-v2 .mag-list__item:focus-within {
  outline: 2px solid var(--hub-accent);
  outline-offset: 2px;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  .hub-v2 .hub-card,
  .hub-v2 .lp-shortcut,
  .hub-v2 .mag-topic-btn,
  .hub-v2 .mag-list__item,
  .hub-v2 .lp-step__articles li {
    transition: none;
  }

  .hub-v2 .hub-card:hover {
    transform: none;
  }
}