/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  border-bottom: 1px solid rgb(221 226 236 / 0.9);
  background: rgb(255 255 255 / 0.93);
  backdrop-filter: blur(16px);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  height: 100%;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  min-width: max-content;
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: 800;
}

.brand img {
  width: 152px;
  height: auto;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  flex: 1;
}

.nav-link,
.nav-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 42px;
  padding: 0 var(--space-3);
  border-radius: var(--radius-md);
  color: var(--color-muted);
  background: transparent;
  font-size: var(--text-sm);
  font-weight: 700;
  transition: color var(--transition), background var(--transition);
}

.nav-link:hover,
.nav-button:hover,
.nav-link[aria-current="page"],
.nav-button[aria-expanded="true"] {
  color: var(--color-ink);
  background: var(--color-border-soft);
}

.nav-button svg,
.icon-button svg {
  width: 18px;
  height: 18px;
}

.header-actions {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.lang-toggle {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  min-height: 42px;
  padding: 0 var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-muted);
  background: var(--color-surface);
  font-size: var(--text-sm);
  font-weight: 800;
  cursor: pointer;
  transition: all var(--transition);
}

.lang-toggle:hover {
  border-color: var(--color-primary);
  color: var(--color-ink);
}

.lang-toggle span.is-active {
  color: var(--color-primary);
  text-decoration: underline;
}


.icon-button {
  display: inline-grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  color: var(--color-muted);
  background: transparent;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}

.icon-button:hover,
.icon-button[aria-expanded="true"] {
  color: var(--color-ink);
  border-color: var(--color-border);
  background: var(--color-surface);
}

.favorite-pill {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  min-height: 42px;
  padding: 0 var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-ink);
  background: var(--color-surface);
  font-size: var(--text-sm);
  font-weight: 700;
}

.favorite-pill__count {
  display: inline-grid;
  place-items: center;
  min-width: 22px;
  height: 22px;
  padding-inline: 6px;
  border-radius: var(--radius-full);
  color: #ffffff;
  background: var(--color-primary);
  font-size: var(--text-xs);
}

.mobile-toggle {
  display: none;
}

.tools-menu {
  position: fixed;
  top: calc(var(--header-height) + 8px);
  left: 50%;
  z-index: 120;
  width: min(960px, calc(100% - 32px));
  max-height: calc(100vh - var(--header-height) - 32px);
  overflow: auto;
  transform: translateX(-50%) translateY(-8px);
  padding: var(--space-5);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition), transform var(--transition);
}

.tools-menu.is-open {
  opacity: 1;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

.tools-menu__grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-5);
}

.tools-menu__category h3 {
  margin-bottom: var(--space-3);
  color: var(--color-ink);
  font-size: var(--text-base);
}

.tools-menu__category ul {
  display: grid;
  gap: var(--space-2);
}

.tools-menu__category a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-3);
  border-radius: var(--radius-md);
  color: var(--color-muted);
  font-weight: 700;
}

.tools-menu__category a:hover {
  color: var(--color-primary-dark);
  background: var(--color-primary-soft);
}

.search-panel,
.favorites-panel {
  position: fixed;
  top: calc(var(--header-height) + 8px);
  right: max(16px, calc((100vw - var(--container)) / 2));
  z-index: 130;
  width: min(440px, calc(100% - 32px));
  max-height: calc(100vh - var(--header-height) - 32px);
  overflow: auto;
  padding: var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  box-shadow: var(--shadow-lg);
}

.search-panel[hidden],
.favorites-panel[hidden] {
  display: none;
}

.search-panel input,
.site-search input,
.catalog-search input,
.form-input {
  width: 100%;
  min-height: 48px;
  padding: 0 var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-ink);
  background: var(--color-surface);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.search-panel input:focus,
.site-search input:focus,
.catalog-search input:focus,
.form-input:focus {
  border-color: var(--color-primary);
  outline: none;
  box-shadow: 0 0 0 4px rgb(33 80 201 / 0.12);
}

.search-results {
  display: grid;
  gap: var(--space-2);
  margin-top: var(--space-3);
}

.search-result {
  display: grid;
  gap: var(--space-1);
  padding: var(--space-3);
  border-radius: var(--radius-md);
  color: var(--color-muted);
}

.search-result:hover {
  color: var(--color-ink);
  background: var(--color-border-soft);
}

.search-result strong {
  color: var(--color-ink);
}

.panel-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-3);
}

.panel-title h2 {
  font-size: var(--text-xl);
}

.panel-list {
  display: grid;
  gap: var(--space-2);
}

.panel-list a {
  display: grid;
  gap: var(--space-1);
  padding: var(--space-3);
  border-radius: var(--radius-md);
  background: var(--color-bg);
}

.panel-list a:hover {
  background: var(--color-primary-soft);
}

/* Buttons and forms */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 46px;
  padding: 0 var(--space-5);
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  font-weight: 800;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition), border-color var(--transition);
}

.btn:hover {
  transform: translateY(-1px);
}

.btn--primary {
  color: #ffffff;
  background: var(--color-primary);
  box-shadow: 0 10px 20px rgb(33 80 201 / 0.2);
}

.btn--primary:hover {
  background: var(--color-primary-dark);
}

.btn--accent {
  color: #ffffff;
  background: var(--color-accent);
  box-shadow: 0 10px 20px rgb(249 115 22 / 0.18);
}

.btn--outline {
  color: var(--color-ink);
  border-color: var(--color-border);
  background: var(--color-surface);
}

.btn--ghost {
  color: var(--color-primary-dark);
  background: transparent;
}

.btn--sm {
  min-height: 36px;
  padding-inline: var(--space-3);
  font-size: var(--text-sm);
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.form-grid {
  display: grid;
  gap: var(--space-4);
}

.form-group {
  display: grid;
  gap: var(--space-2);
}

.form-label {
  color: var(--color-ink);
  font-size: var(--text-sm);
  font-weight: 800;
}

textarea.form-input {
  min-height: 140px;
  padding-block: var(--space-3);
  resize: vertical;
}

/* Home */
.hero {
  padding: var(--space-16) 0 var(--space-12);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border-soft);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(360px, 0.95fr);
  gap: var(--space-10);
  align-items: center;
}

.hero-copy {
  display: grid;
  gap: var(--space-5);
}

.hero h1 {
  font-size: clamp(2.35rem, 5vw, 4.7rem);
  max-width: 760px;
}

.hero p {
  max-width: 660px;
  color: var(--color-muted);
  font-size: clamp(1.05rem, 1vw + 0.9rem, 1.35rem);
}

.site-search {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  max-width: 720px;
  padding: var(--space-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  box-shadow: var(--shadow-md);
}

.site-search input {
  border: 0;
  box-shadow: none;
}

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

.quick-tags a,
.filter-chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  min-height: 38px;
  padding: 0 var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  color: var(--color-muted);
  background: var(--color-surface);
  font-size: var(--text-sm);
  font-weight: 800;
}

.quick-tags a:hover,
.filter-chip:hover,
.filter-chip.is-active {
  color: var(--color-primary-dark);
  border-color: rgb(33 80 201 / 0.25);
  background: var(--color-primary-soft);
}

.hero-dashboard {
  display: grid;
  gap: var(--space-4);
  padding: var(--space-5);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg);
  box-shadow: var(--shadow-lg);
}

.dashboard-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.dashboard-top h2 {
  font-size: var(--text-xl);
}

.dashboard-list {
  display: grid;
  gap: var(--space-3);
}

.dashboard-item {
  display: grid;
  grid-template-columns: 48px 1fr auto;
  gap: var(--space-3);
  align-items: center;
  padding: var(--space-3);
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-md);
  background: var(--color-surface);
}

.dashboard-item__icon,
.tool-card__icon,
.article-icon,
.sidebar-tool-card__icon,
.menu-item-icon,
.tool-placeholder__icon {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: #0b0f19;
  border: 1px solid #1e293b;
  box-shadow: inset 0 0 12px rgba(16, 185, 129, 0.1), 0 0 10px rgba(16, 185, 129, 0.15);
  color: #10b981;
  flex-shrink: 0;
}

.sidebar-tool-card__icon {
  width: 42px;
  height: 42px;
}

.menu-item-icon {
  width: 32px;
  height: 32px;
}

.tool-card__icon svg,
.dashboard-item__icon svg,
.sidebar-tool-card__icon svg,
.menu-item-icon svg {
  width: 26px;
  height: 26px;
  filter: drop-shadow(0 0 5px #10b981);
  transition: transform 0.3s ease, filter 0.3s ease, color 0.3s ease;
}

.sidebar-tool-card__icon svg {
  width: 22px;
  height: 22px;
}

.menu-item-icon svg {
  width: 18px;
  height: 18px;
}

.tool-card:hover .tool-card__icon svg,
.dashboard-item:hover .dashboard-item__icon svg,
.sidebar-tool-card:hover .sidebar-tool-card__icon svg {
  transform: scale(1.15);
  filter: drop-shadow(0 0 8px #38bdf8);
  color: #38bdf8;
}

.dashboard-item h3 {
  font-size: var(--text-base);
}

.dashboard-item p {
  color: var(--color-muted);
  font-size: var(--text-sm);
}

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

.trust-item {
  padding: var(--space-4);
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-md);
  background: var(--color-surface);
}

.trust-item strong {
  display: block;
  color: var(--color-ink);
  font-family: var(--font-heading);
  font-size: var(--text-xl);
}

.trust-item span {
  color: var(--color-muted);
  font-size: var(--text-sm);
}

/* Tool cards */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-4);
}

.tools-grid--three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.tool-card {
  position: relative;
  display: grid;
  gap: var(--space-4);
  min-height: 250px;
  padding: var(--space-5);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.tool-card:hover,
.tool-card:focus-within {
  transform: translateY(-3px);
  border-color: rgb(33 80 201 / 0.35);
  box-shadow: var(--shadow-md);
}

.tool-card__top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-3);
}

.tool-card--matematicas .tool-card__icon,
.dashboard-item--matematicas .dashboard-item__icon {
  color: #38bdf8;
  box-shadow: inset 0 0 12px rgba(56, 189, 248, 0.15), 0 0 10px rgba(56, 189, 248, 0.2);
}
.tool-card--matematicas .tool-card__icon svg,
.dashboard-item--matematicas .dashboard-item__icon svg {
  filter: drop-shadow(0 0 5px #38bdf8);
}

.tool-card--lenguaje .tool-card__icon,
.dashboard-item--lenguaje .dashboard-item__icon {
  color: #a855f7;
  box-shadow: inset 0 0 12px rgba(168, 85, 247, 0.15), 0 0 10px rgba(168, 85, 247, 0.2);
}
.tool-card--lenguaje .tool-card__icon svg,
.dashboard-item--lenguaje .dashboard-item__icon svg {
  filter: drop-shadow(0 0 5px #a855f7);
}

.tool-card--aula .tool-card__icon,
.dashboard-item--aula .dashboard-item__icon {
  color: #10b981;
  box-shadow: inset 0 0 12px rgba(16, 185, 129, 0.15), 0 0 10px rgba(16, 185, 129, 0.2);
}
.tool-card--aula .tool-card__icon svg,
.dashboard-item--aula .dashboard-item__icon svg {
  filter: drop-shadow(0 0 5px #10b981);
}

.tool-card h3 {
  padding-right: var(--space-8);
  font-size: var(--text-xl);
}

.tool-card p {
  color: var(--color-muted);
}

.tool-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: auto;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  min-height: 28px;
  padding: 0 var(--space-2);
  border-radius: var(--radius-full);
  color: var(--color-muted);
  background: var(--color-bg);
  font-size: var(--text-xs);
  font-weight: 800;
}

.tool-card__link {
  position: absolute;
  inset: 0;
  border-radius: var(--radius-md);
}

.tool-card__favorite {
  position: relative;
  z-index: 2;
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-soft);
  background: var(--color-surface);
}

.tool-card__favorite:hover,
.tool-card__favorite.is-active {
  color: var(--color-accent-dark);
  border-color: #fed7aa;
  background: #fff7ed;
}

.category-bands {
  display: grid;
  gap: var(--space-10);
}

.category-band {
  display: grid;
  gap: var(--space-5);
}

.category-band__header {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: var(--space-4);
}

.category-band__header h2 {
  font-size: var(--text-2xl);
}

.catalog-toolbar {
  display: grid;
  gap: var(--space-4);
  padding: var(--space-5);
  border-bottom: 1px solid var(--color-border-soft);
  background: var(--color-surface);
}

.catalog-toolbar__inner {
  display: grid;
  gap: var(--space-4);
}

.catalog-search {
  max-width: 740px;
}

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

/* Blog and page cards */
.article-grid,
.info-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-4);
}

.article-card,
.info-card {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  box-shadow: var(--shadow-sm);
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  text-decoration: none;
  color: var(--color-ink);
}

.article-card:hover {
  transform: translateY(-4px);
  border-color: rgb(33 80 201 / 0.35);
  box-shadow: var(--shadow-md);
}

.article-card__img {
  width: 100%;
  height: 190px;
  object-fit: cover;
  background: linear-gradient(135deg, #1e3a8a, #3b82f6);
  border-bottom: 1px solid var(--color-border-soft);
  transition: transform 0.4s ease;
}

.article-card:hover .article-card__img {
  transform: scale(1.03);
}

.article-card__content {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-5);
  flex: 1;
}

.article-card__meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-1);
}

.article-meta {
  color: var(--color-primary);
  font-size: var(--text-xs);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.article-time {
  color: var(--color-muted);
  font-size: var(--text-xs);
  font-weight: 700;
}

.article-card h3,
.info-card h3 {
  font-size: var(--text-xl);
  line-height: 1.3;
  color: var(--color-ink);
}

.article-card p,
.info-card p {
  color: var(--color-muted);
  font-size: var(--text-sm);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Tool shell */
.tool-shell {
  padding: var(--space-12) 0 var(--space-16);
}

.tool-intro {
  display: grid;
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}

.tool-intro h1 {
  font-size: clamp(2rem, 4vw, 3.75rem);
}

.tool-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: var(--space-6);
  align-items: start;
}

.tool-stage {
  min-height: 380px;
  padding: var(--space-8);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  box-shadow: var(--shadow-sm);
}

.tool-placeholder {
  display: grid;
  place-items: center;
  min-height: 300px;
  text-align: center;
}

.tool-placeholder__content {
  display: grid;
  justify-items: center;
  gap: var(--space-4);
  max-width: 560px;
}

.tool-placeholder h2 {
  font-size: var(--text-3xl);
}

.tool-placeholder p {
  color: var(--color-muted);
}

.tool-sidebar {
  display: grid;
  gap: var(--space-4);
}

.sidebar-block {
  padding: var(--space-5);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
}

.sidebar-block h2 {
  margin-bottom: var(--space-3);
  font-size: var(--text-lg);
}

.sidebar-block ul {
  display: grid;
  gap: var(--space-2);
}

.sidebar-block a {
  color: var(--color-primary-dark);
  font-weight: 800;
}

/* Grade calculator */
.grade-calculator {
  display: grid;
  gap: var(--space-5);
}

.grade-panel {
  display: grid;
  gap: var(--space-5);
  padding: var(--space-6);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  box-shadow: var(--shadow-sm);
}

.grade-panel__header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-4);
}

.grade-panel__header h2 {
  font-size: var(--text-xl);
}

.grade-panel__header p {
  margin-top: var(--space-1);
  color: var(--color-muted);
}

.grade-panel__header > .badge {
  align-self: start;
  justify-self: start;
}

.grade-options {
  display: grid;
  grid-template-columns: minmax(260px, 0.45fr) minmax(0, 1fr);
  gap: var(--space-5);
  align-items: end;
}

.segmented-control {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-1);
  padding: var(--space-1);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg);
}

.segmented-control legend {
  grid-column: 1 / -1;
  padding: 0 0 var(--space-2);
  color: var(--color-ink);
  font-size: var(--text-sm);
  font-weight: 800;
}

.segmented-control label {
  position: relative;
}

.segmented-control input {
  position: absolute;
  inset: 0;
  opacity: 0;
}

.segmented-control span {
  display: grid;
  place-items: center;
  min-height: 42px;
  border-radius: var(--radius-sm);
  color: var(--color-muted);
  font-weight: 800;
}

.segmented-control input:checked + span {
  color: #ffffff;
  background: var(--color-primary);
  box-shadow: var(--shadow-sm);
}

.segmented-control input:focus-visible + span {
  outline: 3px solid rgb(249 115 22 / 0.45);
  outline-offset: 2px;
}

.grade-fields {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-4);
}

.grade-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-md);
}

.grade-entry-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 680px;
}

.grade-entry-table th {
  padding: var(--space-3) var(--space-4);
  color: var(--color-muted);
  background: var(--color-bg);
  font-size: var(--text-sm);
  text-align: left;
}

.grade-entry-table td {
  padding: var(--space-3) var(--space-4);
  border-top: 1px solid var(--color-border-soft);
  vertical-align: middle;
}

.grade-input {
  width: 100%;
  min-height: 42px;
  padding: 0 var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-ink);
  background: var(--color-surface);
}

.grade-input:focus {
  border-color: var(--color-primary);
  outline: none;
  box-shadow: 0 0 0 4px rgb(33 80 201 / 0.1);
}

.grade-input--number {
  max-width: 140px;
}

.weight-input {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.weight-input span {
  color: var(--color-muted);
  font-weight: 800;
}

.grade-row-actions {
  width: 56px;
  text-align: right;
}

.row-remove {
  display: inline-grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-muted);
  background: var(--color-surface);
  font-size: var(--text-xl);
  line-height: 1;
}

.row-remove:hover {
  color: var(--color-error);
  border-color: #fecaca;
  background: #fef2f2;
}

.grade-panel--result {
  border-color: rgb(33 80 201 / 0.22);
  background: linear-gradient(180deg, #ffffff, #f8fbff);
}

.grade-result {
  display: grid;
  grid-template-columns: minmax(220px, 0.45fr) minmax(0, 1fr);
  gap: var(--space-6);
  align-items: center;
}

.grade-result__number {
  display: block;
  margin: var(--space-2) 0;
  color: var(--color-ink);
  font-family: var(--font-heading);
  font-size: clamp(2.4rem, 5vw, 4.2rem);
  font-weight: 900;
  line-height: 1;
}

.grade-result__status {
  color: var(--color-muted);
  font-weight: 800;
}

.grade-summary {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-3);
}

.summary-item {
  display: grid;
  gap: var(--space-1);
  padding: var(--space-3);
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-md);
  background: var(--color-surface);
}

.summary-item span {
  color: var(--color-muted);
  font-size: var(--text-xs);
  font-weight: 800;
  text-transform: uppercase;
}

.summary-item strong {
  color: var(--color-ink);
  font-size: var(--text-sm);
}

.grade-meter {
  grid-column: 1 / -1;
  height: 12px;
  overflow: hidden;
  border-radius: var(--radius-full);
  background: var(--color-border-soft);
}

.grade-meter span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--color-primary), var(--color-success));
}

.grade-alert {
  padding: var(--space-4);
  border-radius: var(--radius-md);
  font-weight: 800;
}

.grade-alert--success {
  color: #075e45;
  background: #ecfdf5;
}

.grade-alert--warning {
  color: #7c3b08;
  background: #fff7ed;
}

.grade-alert--error {
  color: #991b1b;
  background: #fef2f2;
}

.grade-actions {
  justify-content: flex-end;
}

/* Footer */
.site-footer {
  color: #d9deea;
  background: #151927;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr repeat(3, 1fr) 1.35fr;
  gap: var(--space-8);
  padding: var(--space-12) 0;
}

.footer-brand {
  display: grid;
  gap: var(--space-4);
}

.footer-brand img {
  width: 142px;
  height: auto;
}

.footer-brand p,
.footer-links a,
.footer-note {
  color: #aab3c5;
}

.footer-links h3,
.footer-email h3 {
  margin-bottom: var(--space-3);
  color: #ffffff;
  font-size: var(--text-base);
}

.footer-links ul {
  display: grid;
  gap: var(--space-2);
}

.footer-links a:hover {
  color: #ffffff;
}

.email-form {
  display: grid;
  gap: var(--space-2);
}

.email-form input {
  min-height: 44px;
  padding: 0 var(--space-3);
  border: 1px solid #363d51;
  border-radius: var(--radius-md);
  color: #ffffff;
  background: #101421;
}

.footer-bottom {
  border-top: 1px solid #252b3d;
}

.footer-bottom .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  min-height: 70px;
  color: #8f98ab;
  font-size: var(--text-sm);
}

.cookie-banner {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 200;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--space-4);
  align-items: center;
  width: min(680px, calc(100% - 36px));
  padding: var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  box-shadow: var(--shadow-lg);
}

.cookie-banner[hidden] {
  display: none;
}

.cookie-banner p {
  color: var(--color-muted);
  font-size: var(--text-sm);
}

.cookie-banner a {
  color: var(--color-primary-dark);
  font-weight: 800;
}

.cookie-actions {
  display: flex;
  gap: var(--space-2);
}

/* Blog Page Layout */
.blog-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 350px;
  gap: 3rem;
  align-items: start;
}

.star-banner {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 2.5rem;
  background: linear-gradient(135deg, #ffffff, #f4f8ff);
  border: 1px solid rgb(33 80 201 / 0.2);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: box-shadow 0.3s ease, border-color 0.3s ease;
}

.star-banner:hover {
  box-shadow: var(--shadow-lg);
  border-color: rgb(33 80 201 / 0.4);
}

.star-banner__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.star-banner:hover .star-banner__img {
  transform: scale(1.04);
}

.sidebar-tool-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  border-radius: var(--radius-md);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  text-decoration: none;
  color: var(--color-ink);
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.sidebar-tool-card:hover {
  border-color: rgb(33 80 201 / 0.35);
  transform: translateX(4px);
  background: var(--color-bg);
  box-shadow: var(--shadow-sm);
}

.infeed-tool-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background: linear-gradient(135deg, #1e293b, #0f172a);
  border: 1px solid #334155;
  border-radius: var(--radius-md);
  padding: 2.25rem;
  color: #fff;
  box-shadow: var(--shadow-md);
}

/* Individual Article Layout & SEO Retention Elements */
.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 350px;
  gap: 4rem;
  align-items: start;
}

.article-tldr {
  background: linear-gradient(135deg, rgb(33 80 201 / 0.08), rgb(33 80 201 / 0.02));
  border-left: 4px solid var(--color-primary);
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
  padding: 1.5rem 1.75rem;
  margin: 1.5rem 0 2.5rem;
}

.article-tldr__title {
  font-size: 0.9rem;
  font-weight: 800;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.cta-inline {
  display: inline-block;
  background: #eef3ff;
  color: var(--color-primary-dark);
  font-weight: 800;
  padding: 0.2rem 0.6rem;
  border-radius: 6px;
  text-decoration: none !important;
  border-bottom: 2px solid var(--color-primary);
  transition: all 0.2s ease;
}

.cta-inline:hover {
  background: var(--color-primary);
  color: #fff;
}

.article-interruption-banner {
  margin: 3.5rem 0;
  background: linear-gradient(135deg, #1e293b, #0f172a);
  border: 1px solid #334155;
  border-radius: var(--radius-xl);
  padding: 2.5rem 3rem;
  color: #fff;
  box-shadow: var(--shadow-lg);
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 2rem;
  align-items: center;
}

.article-dilemma-box {
  margin: 4rem 0 2rem;
  border-top: 2px solid var(--color-border);
  padding-top: 3rem;
}

.dilemma-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.dilemma-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.dilemma-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

@media (max-width: 1100px) {
  .tools-grid,
  .tools-grid--three {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .hero-grid,
  .grade-options,
  .tool-layout,
  .blog-layout,
  .star-banner,
  .article-layout,
  .article-interruption-banner,
  .dilemma-grid {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 860px) {
  .main-nav {
    position: fixed;
    inset: var(--header-height) 0 auto 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: var(--space-4);
    border-bottom: 1px solid var(--color-border);
    background: var(--color-surface);
    box-shadow: var(--shadow-md);
  }

  .main-nav.is-open {
    display: flex;
  }

  .nav-link,
  .nav-button {
    justify-content: flex-start;
    width: 100%;
  }

  .mobile-toggle {
    display: inline-grid;
  }

  .favorite-pill span:not(.favorite-pill__count) {
    display: none;
  }

  .tools-menu {
    top: calc(var(--header-height) + 76px);
    width: min(100% - 24px, 560px);
  }

  .tools-menu__grid,
  .article-grid,
  .info-grid {
    grid-template-columns: 1fr;
  }

  .hero-dashboard {
    padding: var(--space-4);
  }

  .grade-fields,
  .grade-result,
  .grade-summary {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 620px) {
  .brand img {
    width: 128px;
  }

  .hero {
    padding-top: var(--space-10);
  }

  .site-search,
  .dashboard-item,
  .footer-bottom .container,
  .cookie-banner {
    grid-template-columns: 1fr;
  }

  .site-search {
    display: grid;
  }

  .trust-strip,
  .tools-grid,
  .tools-grid--three,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .category-band__header,
  .footer-bottom .container,
  .cookie-banner {
    align-items: start;
  }

  .cookie-actions,
  .button-row {
    width: 100%;
  }

  .cookie-actions .btn,
  .button-row .btn {
    flex: 1;
  }

  .tool-stage {
    padding: var(--space-5);
  }

  .grade-panel {
    padding: var(--space-4);
  }

  .grade-panel__header {
    display: grid;
  }

  .grade-entry-table,
  .grade-entry-table thead,
  .grade-entry-table tbody,
  .grade-entry-table th,
  .grade-entry-table td,
  .grade-entry-table tr {
    display: block;
    min-width: 0;
  }

  .grade-entry-table thead {
    display: none;
  }

  .grade-entry-table tr {
    padding: var(--space-3);
    border-top: 1px solid var(--color-border-soft);
  }

  .grade-entry-table tr:first-child {
    border-top: 0;
  }

  .grade-entry-table td {
    display: grid;
    gap: var(--space-2);
    padding: var(--space-2) 0;
    border-top: 0;
  }

  .grade-entry-table td::before {
    content: attr(data-label);
    color: var(--color-muted);
    font-size: var(--text-xs);
    font-weight: 800;
    text-transform: uppercase;
  }

  .grade-row-actions {
    width: auto;
    text-align: left;
  }

  .grade-row-actions::before {
    display: none;
  }

  .grade-input--number {
    max-width: none;
  }
}

/* ============================================
   Buy Me a Coffee (BMC) - Premium UI Component
   ============================================ */

/* Botón del Header */
.btn--bmc-header {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.45rem 1rem;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, #FFDD00, #FBBF24);
  color: #171923;
  font-weight: 900;
  font-size: var(--text-sm);
  box-shadow: 0 2px 8px rgba(251, 191, 36, 0.4);
  transition: all var(--transition);
}

.btn--bmc-header:hover {
  transform: translateY(-2px) scale(1.03);
  box-shadow: 0 4px 12px rgba(251, 191, 36, 0.6);
  background: linear-gradient(135deg, #FDE047, #F59E0B);
  color: #000;
}

.bmc-header-icon {
  font-size: 1.2rem;
  animation: bmc-steam 3s infinite ease-in-out;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

@media (max-width: 680px) {
  .bmc-header-text {
    display: none;
  }
  .btn--bmc-header {
    padding: 0.5rem 0.65rem;
  }
}

/* Widget Flotante Fijo */
.bmc-widget-container {
  position: fixed;
  left: 24px;
  bottom: 24px;
  z-index: 990;
}

.bmc-widget-btn {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.85rem;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(251, 191, 36, 0.6);
  box-shadow: 0 8px 32px rgba(23, 25, 35, 0.15), 0 0 0 2px rgba(251, 191, 36, 0.3);
  color: var(--color-ink);
  font-weight: 800;
  font-size: var(--text-sm);
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  overflow: hidden;
  max-width: 56px;
  white-space: nowrap;
}

.bmc-widget-icon {
  font-size: 1.5rem;
  line-height: 1;
  flex-shrink: 0;
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  animation: bmc-pulse 2.5s infinite cubic-bezier(0.4, 0, 0.6, 1);
}

.bmc-widget-tooltip {
  opacity: 0;
  transform: translateX(-10px);
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  color: var(--color-ink);
  font-weight: 800;
  padding-right: 0.5rem;
}

.bmc-widget-btn:hover {
  max-width: 340px;
  padding: 0.85rem 1.25rem 0.85rem 0.85rem;
  background: linear-gradient(135deg, #FFDD00, #FBBF24);
  border-color: #F59E0B;
  box-shadow: 0 12px 40px rgba(245, 158, 11, 0.35);
}

.bmc-widget-btn:hover .bmc-widget-tooltip {
  opacity: 1;
  transform: translateX(0);
}

/* Modal BMC Premium */
.bmc-modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 1500;
  display: grid;
  place-items: center;
  background: rgba(15, 23, 42, 0.65);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  padding: var(--space-4);
  transition: opacity var(--transition);
}

.bmc-modal-backdrop[hidden] {
  display: none;
}

.bmc-modal-card {
  position: relative;
  width: min(540px, 100%);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 2.5rem;
  box-shadow: var(--shadow-lg), 0 0 0 1px rgba(251, 191, 36, 0.2);
  text-align: center;
  overflow-y: auto;
  max-height: 90vh;
}

.bmc-modal-close {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background: var(--color-bg);
  color: var(--color-muted);
  display: grid;
  place-items: center;
  transition: all var(--transition);
}

.bmc-modal-close:hover {
  background: #fef2f2;
  color: var(--color-error);
  transform: rotate(90deg);
}

.bmc-modal-header {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.bmc-modal-header .bmc-modal-icon {
  font-size: 3rem;
  line-height: 1;
  animation: bmc-steam 3s infinite ease-in-out;
}

.bmc-modal-header h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 900;
  color: var(--color-ink);
}

.bmc-modal-subtitle {
  color: var(--color-muted);
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: 2rem;
  padding-inline: 1rem;
}

.bmc-modal-qr-box {
  background: linear-gradient(180deg, #ffffff, #f8fbff);
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin-bottom: 1.75rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.bmc-modal-step {
  font-size: 0.85rem;
  font-weight: 800;
  text-transform: uppercase;
  color: var(--color-primary-dark);
  letter-spacing: 0.05em;
  margin: 0;
}

.bmc-modal-qr {
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  background: #fff;
  padding: 0.5rem;
  border: 1px solid var(--color-border-soft);
  max-width: 200px;
  height: auto;
}

.bmc-modal-action-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.btn--bmc-direct {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  width: 100%;
  padding: 1rem 2rem;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, #FFDD00, #FBBF24);
  color: #171923;
  font-weight: 900;
  font-size: 1.1rem;
  box-shadow: 0 4px 16px rgba(251, 191, 36, 0.4);
  transition: all var(--transition);
}

.btn--bmc-direct:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(251, 191, 36, 0.6);
  background: linear-gradient(135deg, #FDE047, #F59E0B);
  color: #000;
}

.bmc-modal-secure {
  font-size: 0.75rem;
  color: var(--color-soft);
  margin: 0;
}

/* Banners Contextuales (Herramientas y Blog) */
.bmc-banner {
  margin: 3rem 0;
  background: linear-gradient(135deg, #ffffff, #fffbeb);
  border: 1px solid rgba(251, 191, 36, 0.4);
  border-radius: var(--radius-xl);
  padding: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  box-shadow: var(--shadow-md), 0 4px 20px rgba(251, 191, 36, 0.1);
  transition: all var(--transition);
}

.bmc-banner:hover {
  box-shadow: var(--shadow-lg), 0 8px 30px rgba(251, 191, 36, 0.2);
  transform: translateY(-2px);
  border-color: rgba(251, 191, 36, 0.8);
}

.bmc-banner__content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.5rem;
}

.bmc-banner__badge {
  display: inline-block;
  background: #FEF3C7;
  color: #B45309;
  font-size: 0.75rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.3rem 0.8rem;
  border-radius: var(--radius-full);
  margin-bottom: 0.5rem;
  border: 1px solid rgba(251, 191, 36, 0.3);
}

.bmc-banner h3 {
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--color-ink);
}

.bmc-banner p {
  color: var(--color-muted);
  font-size: 0.95rem;
  line-height: 1.5;
}

.btn--bmc-banner {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 1.75rem;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, #FFDD00, #FBBF24);
  color: #171923;
  font-weight: 900;
  font-size: 1rem;
  flex-shrink: 0;
  box-shadow: 0 4px 12px rgba(251, 191, 36, 0.3);
  transition: all var(--transition);
}

.btn--bmc-banner:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 6px 20px rgba(251, 191, 36, 0.5);
  background: linear-gradient(135deg, #FDE047, #F59E0B);
  color: #000;
}

/* Tarjeta Sidebar BMC */
.bmc-sidebar-card {
  background: linear-gradient(135deg, #ffffff, #fffbeb);
  border: 1px solid rgba(251, 191, 36, 0.4);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
}

.bmc-sidebar-card:hover {
  box-shadow: var(--shadow-md);
  border-color: rgba(251, 191, 36, 0.8);
  transform: translateY(-2px);
}

.bmc-sidebar-card__header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.bmc-sidebar-card__header .bmc-card-icon {
  font-size: 1.4rem;
}

.bmc-sidebar-card__header h3 {
  font-size: 1.1rem;
  font-weight: 900;
  color: var(--color-ink);
}

.bmc-sidebar-card p {
  color: var(--color-muted);
  font-size: 0.85rem;
  line-height: 1.5;
}

.btn--bmc-sm {
  width: 100%;
  padding: 0.65rem 1rem;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, #FFDD00, #FBBF24);
  color: #171923;
  font-weight: 900;
  font-size: 0.9rem;
  text-align: center;
  box-shadow: 0 2px 8px rgba(251, 191, 36, 0.3);
  transition: all var(--transition);
}

.btn--bmc-sm:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(251, 191, 36, 0.5);
  background: linear-gradient(135deg, #FDE047, #F59E0B);
  color: #000;
}

@media (max-width: 768px) {
  .bmc-banner {
    flex-direction: column;
    align-items: stretch;
    text-align: center;
    padding: 2rem 1.5rem;
  }
  .bmc-banner__content {
    align-items: center;
  }
}