/* ==========================================================================
   Learning Center Hub — HD Signature Remodeling
   Premium editorial hub layout. Uses site CSS tokens exclusively.
   Dark mode via [data-theme="dark"] variable overrides.
   ========================================================================== */

/* ── Admin Bar ─────────────────────────────────────────────────────────── */

.lc-admin-bar {
  background: rgba(196, 154, 58, 0.08);
  border-bottom: 1px solid rgba(196, 154, 58, 0.18);
  padding: var(--space-3) 0;
}

.lc-admin-bar__inner {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--fs-sm);
  color: var(--color-text-secondary);
}

.lc-admin-bar__inner svg {
  width: 16px;
  height: 16px;
  color: var(--color-warning);
  flex-shrink: 0;
}

.lc-admin-bar__link {
  margin-left: auto;
  font-weight: var(--fw-semibold);
  color: var(--color-signature);
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--transition-fast);
}

.lc-admin-bar__link:hover {
  color: var(--color-signature-hover);
}

[data-theme="dark"] .lc-admin-bar {
  background: rgba(196, 154, 58, 0.06);
  border-bottom-color: rgba(196, 154, 58, 0.12);
}

/* ── Search + Toolbar ──────────────────────────────────────────────────── */

.lc-toolbar {
  padding-top: var(--space-8);
  padding-bottom: var(--space-4);
}

.lc-toolbar__inner {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  max-width: 680px;
  margin: 0 auto;
}

/* Search Input */
.lc-search {
  position: relative;
  width: 100%;
  max-width: 520px;
}

.lc-search__icon {
  position: absolute;
  left: var(--space-5);
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 18px;
  color: var(--color-text-muted);
  pointer-events: none;
}

.lc-search__input {
  width: 100%;
  padding: var(--space-4) var(--space-12) var(--space-4) var(--space-12);
  font-family: var(--font-body);
  font-size: var(--fs-base);
  color: var(--color-text);
  background: var(--color-surface);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-full);
  outline: none;
  transition:
    border-color var(--transition-fast),
    box-shadow var(--transition-normal),
    background-color var(--transition-fast);
}

.lc-search__input::placeholder {
  color: var(--color-text-muted);
}

.lc-search__input:hover {
  border-color: var(--color-charcoal-20);
}

.lc-search__input:focus {
  border-color: var(--color-signature);
  box-shadow: var(--shadow-glow-sm);
  background: var(--color-surface);
}

[data-theme="dark"] .lc-search__input {
  background: var(--color-surface);
  border-color: var(--color-border);
}

[data-theme="dark"] .lc-search__input:hover {
  border-color: var(--color-text-muted);
}

[data-theme="dark"] .lc-search__input:focus {
  border-color: var(--color-signature);
}

.lc-search__clear {
  position: absolute;
  right: var(--space-4);
  top: 50%;
  transform: translateY(-50%);
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-charcoal-5);
  border: none;
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
  cursor: pointer;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.lc-search__clear:hover {
  background: var(--color-charcoal-10);
  color: var(--color-text);
}

.lc-search__clear svg {
  width: 14px;
  height: 14px;
}

/* ── Filter Toggle Button ─────────────────────────────────────────────── */

.lc-filter-toggle {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  font-family: var(--font-body);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--color-text-secondary);
  background: var(--color-surface);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-full);
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
  transition:
    background-color var(--transition-fast),
    border-color var(--transition-fast),
    color var(--transition-fast),
    box-shadow var(--transition-fast);
}

.lc-filter-toggle > svg:first-child {
  width: 15px;
  height: 15px;
  flex-shrink: 0;
}

.lc-filter-toggle__chevron {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
  transition: transform var(--transition-fast);
}

.lc-filter-toggle.is-open .lc-filter-toggle__chevron {
  transform: rotate(180deg);
}

.lc-filter-toggle:hover {
  background: var(--color-charcoal-5);
  border-color: var(--color-charcoal-20);
  color: var(--color-text);
}

.lc-filter-toggle.has-active {
  border-color: var(--color-signature);
  color: var(--color-signature);
  background: var(--color-signature-5);
}

.lc-filter-toggle__count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 18px;
  height: 18px;
  font-size: 0.6875rem;
  font-weight: var(--fw-bold);
  color: var(--color-white);
  background: var(--color-signature);
  border-radius: var(--radius-full);
  padding: 0 5px;
  line-height: 1;
}

[data-theme="dark"] .lc-filter-toggle {
  background: var(--color-surface);
  border-color: var(--color-border);
  color: var(--color-text-secondary);
}

[data-theme="dark"] .lc-filter-toggle:hover {
  background: var(--color-surface-hover);
  border-color: var(--color-text-muted);
  color: var(--color-text);
}

[data-theme="dark"] .lc-filter-toggle.has-active {
  border-color: var(--color-signature);
  color: var(--color-signature);
  background: rgba(232, 97, 26, 0.08);
}

/* ── Expandable Filter Panel ──────────────────────────────────────────── */

.lc-filter-panel {
  margin-top: var(--space-4);
  max-width: 680px;
  margin-left: auto;
  margin-right: auto;
}

.lc-filter-panel__inner {
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-xl);
  padding: var(--space-5) var(--space-6);
  box-shadow: var(--shadow-sm);
}

.lc-filter-panel__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-4);
}

.lc-filter-panel__title {
  font-family: var(--font-accent);
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--ls-widest);
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.lc-filter-panel__clear {
  font-family: var(--font-body);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  color: var(--color-signature);
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast);
}

.lc-filter-panel__clear:hover {
  background: var(--color-signature-5);
}

[data-theme="dark"] .lc-filter-panel__inner {
  background: var(--color-surface);
  border-color: var(--color-border);
}

/* ── Tag Filter Pills (inside panel) ─────────────────────────────────── */

.lc-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.lc-tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  font-family: var(--font-body);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--color-text-secondary);
  background: var(--color-bg-alt);
  border: 1px solid transparent;
  border-radius: var(--radius-full);
  cursor: pointer;
  white-space: nowrap;
  transition:
    background-color var(--transition-fast),
    border-color var(--transition-fast),
    color var(--transition-fast),
    box-shadow var(--transition-fast);
}

.lc-tag:hover {
  background: var(--color-charcoal-5);
  border-color: var(--color-charcoal-20);
  color: var(--color-text);
}

.lc-tag.is-active {
  background: var(--color-charcoal);
  border-color: var(--color-charcoal);
  color: var(--color-text-on-primary);
}

.lc-tag.is-active:hover {
  background: var(--color-charcoal-hover);
  border-color: var(--color-charcoal-hover);
}

.lc-tag__count {
  font-size: var(--fs-xs);
  opacity: 0.6;
}

.lc-tag.is-active .lc-tag__count {
  opacity: 0.7;
}

[data-theme="dark"] .lc-tag {
  background: var(--color-surface);
  color: var(--color-text-secondary);
}

[data-theme="dark"] .lc-tag:hover {
  background: var(--color-surface-hover);
  border-color: var(--color-text-muted);
  color: var(--color-text);
}

[data-theme="dark"] .lc-tag.is-active {
  background: var(--color-text);
  border-color: var(--color-text);
  color: var(--color-bg);
}

/* ── Featured Articles Carousel ────────────────────────────────────────── */

/* Section header — minimal, left-aligned */
.lc-featured-header {
  margin-bottom: var(--space-6);
}

.lc-featured-header .section-header__label {
  margin-bottom: 0;
}

/* Viewport clips the overflow; track slides inside it */
.lc-featured-viewport {
  overflow: hidden;
}

.lc-featured-track {
  display: flex;
  gap: var(--space-6);
  transition: transform var(--transition-slow);
}

/* Each featured card: always 1 visible at a time */
.lc-featured {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-2xl);
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  flex: 0 0 100%;
  min-width: 0;
  transition:
    transform var(--transition-normal),
    box-shadow var(--transition-normal),
    border-color var(--transition-normal);
}

.lc-featured:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
  border-color: var(--color-signature-15);
  color: inherit;
}

/* When no image: featured card becomes single-column content */
.lc-featured:not(:has(.lc-featured__image)) {
  grid-template-columns: 1fr;
}

.lc-featured__image {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, var(--color-charcoal-10), var(--color-champagne-10));
}

.lc-featured__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.lc-featured:hover .lc-featured__image img {
  transform: scale(1.04);
}

.lc-featured__placeholder {
  width: 100%;
  height: 100%;
  min-height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
}

.lc-featured__placeholder svg {
  width: 56px;
  height: 56px;
  opacity: 0.3;
}

.lc-featured__content {
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.lc-featured__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.lc-featured__badge {
  display: inline-block;
  font-family: var(--font-accent);
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--ls-widest);
  text-transform: uppercase;
  color: var(--color-signature);
  background: var(--color-signature-10);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
}

.lc-featured__category {
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.lc-featured__time {
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
}

.lc-featured__title {
  font-family: var(--font-heading);
  font-size: var(--fs-2xl);
  font-weight: var(--fw-semibold);
  line-height: var(--lh-snug);
  letter-spacing: var(--ls-tight);
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.lc-featured__excerpt {
  font-size: var(--fs-sm);
  color: var(--color-text-secondary);
  line-height: var(--lh-relaxed);
  margin-bottom: var(--space-5);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.lc-featured__link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: var(--fw-semibold);
  font-size: var(--fs-sm);
  color: var(--color-signature);
  transition: gap var(--transition-fast);
}

.lc-featured:hover .lc-featured__link {
  gap: var(--space-3);
}

[data-theme="dark"] .lc-featured {
  background: var(--color-surface);
  border-color: var(--color-border);
}

[data-theme="dark"] .lc-featured:hover {
  border-color: var(--color-signature-15);
}

[data-theme="dark"] .lc-featured__image {
  background: linear-gradient(135deg, rgba(62, 59, 57, 0.5), rgba(43, 45, 46, 0.3));
}

/* Carousel Navigation */
.lc-featured-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  margin-top: var(--space-6);
}

.lc-featured-nav__btn {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
  cursor: pointer;
  transition:
    background-color var(--transition-fast),
    color var(--transition-fast),
    border-color var(--transition-fast),
    box-shadow var(--transition-fast);
}

.lc-featured-nav__btn:hover:not(:disabled) {
  background: var(--color-charcoal);
  color: var(--color-white);
  border-color: var(--color-charcoal);
  box-shadow: var(--shadow-md);
}

.lc-featured-nav__btn:disabled {
  opacity: 0.35;
  cursor: default;
}

.lc-featured-nav__btn svg {
  width: 18px;
  height: 18px;
}

.lc-featured-dots {
  display: flex;
  gap: var(--space-2);
  align-items: center;
}

.lc-featured-dot {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  background: var(--color-border);
  border: none;
  padding: 0;
  cursor: pointer;
  transition: background var(--transition-fast), transform var(--transition-fast);
}

.lc-featured-dot.is-active {
  background: var(--color-signature);
  transform: scale(1.35);
}

[data-theme="dark"] .lc-featured-nav__btn {
  background: var(--color-surface);
  border-color: var(--color-border);
}

[data-theme="dark"] .lc-featured-nav__btn:hover:not(:disabled) {
  background: var(--color-text);
  color: var(--color-bg);
  border-color: var(--color-text);
}

[data-theme="dark"] .lc-featured-dot {
  background: var(--color-border);
}

/* Featured responsive: tighter spacing below 1024px */
@media (max-width: 1023px) {
  .lc-featured__content {
    padding: var(--space-6);
  }

  .lc-featured__title {
    font-size: var(--fs-xl);
  }
}

@media (max-width: 640px) {
  .lc-featured {
    grid-template-columns: 1fr;
  }

  .lc-featured__image {
    aspect-ratio: 16 / 9;
  }

  .lc-featured-nav__btn {
    width: 36px;
    height: 36px;
  }

  .lc-featured-nav__btn svg {
    width: 16px;
    height: 16px;
  }
}

/* ── Category Sections ─────────────────────────────────────────────────── */

.lc-category-section .section-header {
  text-align: left;
  align-items: flex-start;
  max-width: none;
  margin-bottom: var(--space-8);
}

.lc-category-section .section-header__label::before {
  display: inline-block;
}

.lc-category-section .section-header__label::after {
  display: none;
}

.lc-category-section .section-header__title {
  font-size: var(--fs-2xl);
}

/* Alternating section backgrounds */
.lc-category-section:nth-child(even) {
  background-color: var(--color-bg-alt);
}

/* ── Section Header with View All link ─────────────────────────────────── */

.lc-section-header--with-link {
  position: relative;
}

.lc-section-view-all {
  position: absolute;
  top: 0;
  right: 0;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--color-accent);
  text-decoration: none;
  white-space: nowrap;
  padding: 0.375rem 0.875rem;
  border: 1.5px solid var(--color-accent);
  border-radius: var(--radius-full);
  background: transparent;
  transition:
    background var(--transition-fast),
    color var(--transition-fast),
    transform var(--transition-fast);
}

.lc-section-view-all:hover {
  background: var(--color-accent);
  color: #fff;
  transform: translateY(-1px);
}

.lc-section-view-all:active {
  transform: translateY(0);
}

@media (max-width: 640px) {
  .lc-section-view-all {
    position: static;
    margin-top: var(--space-3);
  }
}

.lc-section-more {
  text-align: center;
  margin-top: var(--space-8);
}

/* Overflow cards — hidden by default, shown during search/filter */
.lc-card--overflow {
  display: none;
}

/* When actively filtering, show overflow cards that match and hide "view all" UI */
.lc-hub--filtering .lc-card--overflow:not(.is-filtered-out) {
  display: flex;
}

.lc-hub--filtering .lc-section-view-all,
.lc-hub--filtering .lc-section-more {
  display: none;
}

/* ── Article Grid ──────────────────────────────────────────────────────── */

.lc-article-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
}

@media (max-width: 1023px) {
  .lc-article-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .lc-article-grid {
    grid-template-columns: 1fr;
  }
}

/* ── Article Cards ─────────────────────────────────────────────────────── */

.lc-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-2xl);
  overflow: hidden;
  position: relative;
  display: flex;
  flex-direction: column;
  transition:
    transform var(--transition-normal),
    box-shadow var(--transition-normal),
    border-color var(--transition-normal);
}

.lc-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
  border-color: var(--color-signature-15);
}

/* Card Image */
.lc-card__image-link {
  display: block;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  background: linear-gradient(135deg, var(--color-charcoal-10), var(--color-champagne-10));
}

.lc-card__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.lc-card:hover .lc-card__image {
  transform: scale(1.04);
}

.lc-card__image-placeholder {
  aspect-ratio: 16 / 10;
  background: linear-gradient(135deg, var(--color-charcoal-10), var(--color-champagne-10));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
}

.lc-card__image-placeholder svg {
  width: 40px;
  height: 40px;
  opacity: 0.25;
}

[data-theme="dark"] .lc-card__image-placeholder,
[data-theme="dark"] .lc-card__image-link {
  background: linear-gradient(135deg, rgba(62, 59, 57, 0.5), rgba(43, 45, 46, 0.3));
}

/* Card Body */
.lc-card__body {
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  flex: 1;
}

/* Meta Row: Category + Template */
.lc-card__meta-top {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}

.lc-card__category {
  font-family: var(--font-accent);
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--color-signature);
}

.lc-card__template {
  font-size: 0.6875rem;
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  padding: 2px var(--space-2);
  border-radius: var(--radius-xs);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
}

.lc-card__template--guide {
  border-color: var(--color-signature-20);
  color: var(--color-signature);
  background: var(--color-signature-5);
}

.lc-card__template--deep-dive {
  border-color: var(--color-charcoal-20);
  color: var(--color-text-secondary);
  background: var(--color-charcoal-5);
}

.lc-card__template--listicle {
  border-color: rgba(200, 185, 166, 0.3);
  color: var(--color-warm-taupe);
  background: var(--color-champagne-10);
}

/* Card Title */
.lc-card__title {
  font-family: var(--font-body);
  font-size: var(--fs-xl);
  font-weight: var(--fw-semibold);
  line-height: var(--lh-snug);
  margin-bottom: var(--space-3);
}

.lc-card__title a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

.lc-card__title a:hover {
  color: var(--color-signature);
}

/* Card Excerpt */
.lc-card__excerpt {
  font-size: var(--fs-sm);
  color: var(--color-text-secondary);
  line-height: var(--lh-relaxed);
  margin-bottom: var(--space-4);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex: 1;
}

/* Card Footer */
.lc-card__footer {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  margin-top: auto;
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border-light);
}

.lc-card__footer span:not(:last-child)::after,
.lc-card__footer time:not(:last-child)::after {
  content: '\00B7';
  margin-left: var(--space-3);
  opacity: 0.5;
}

[data-theme="dark"] .lc-card {
  background: var(--color-surface);
  border-color: var(--color-border);
}

[data-theme="dark"] .lc-card__footer {
  border-top-color: var(--color-border);
}

/* ── Status Badges ─────────────────────────────────────────────────────── */

.lc-status-badge {
  position: absolute;
  top: var(--space-3);
  right: var(--space-3);
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  z-index: 2;
  letter-spacing: 0.02em;
}

.lc-status-badge--draft {
  background: var(--color-warning);
  color: #fff;
}

.lc-status-badge--archived {
  background: var(--color-text-muted);
  color: #fff;
}

/* ── Filter Transitions ────────────────────────────────────────────────── */

.is-filtered-out {
  opacity: 0 !important;
  pointer-events: none !important;
  position: absolute !important;
  visibility: hidden !important;
}

@media (prefers-reduced-motion: reduce) {
  .is-filtered-out {
    transition: none;
  }
}

/* ── No Results ────────────────────────────────────────────────────────── */

.lc-no-results {
  padding: var(--space-20) 0;
}

.lc-no-results__icon {
  width: 56px;
  height: 56px;
  color: var(--color-text-muted);
  opacity: 0.4;
  margin: 0 auto var(--space-6);
}

.lc-no-results__title {
  font-family: var(--font-heading);
  font-size: var(--fs-2xl);
  font-weight: var(--fw-semibold);
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.lc-no-results__text {
  font-size: var(--fs-base);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-6);
}

/* ── Responsive ────────────────────────────────────────────────────────── */

@media (max-width: 767px) {
  .lc-toolbar {
    padding-top: var(--space-6);
    padding-bottom: var(--space-2);
  }

  .lc-toolbar__inner {
    flex-wrap: wrap;
  }

  .lc-search {
    max-width: none;
    flex: 1 1 100%;
  }

  .lc-filter-toggle {
    width: 100%;
    justify-content: center;
  }

  .lc-filter-panel {
    max-width: none;
  }

  .lc-filter-panel__inner {
    padding: var(--space-4) var(--space-4);
  }

  .lc-admin-bar__inner {
    font-size: var(--fs-xs);
  }

  .lc-category-section .section-header__title {
    font-size: var(--fs-xl);
  }

  .lc-card__body {
    padding: var(--space-5);
  }
}