/* ============================================
   WORD A DAY (VC IDENTITY)
   Uses the same tokens/feel from the home-page
   ============================================ */

:root {
  /* Reuse home-page tokens */
  --wad-bg: var(--home-page-bg, #f7f9ff);
  --wad-surface: var(--home-page-surface, rgba(255,255,255,.78));
  --wad-surface-2: var(--home-page-surface-2, rgba(255,255,255,.92));
  --wad-border: var(--home-page-border, rgba(20, 30, 60, .10));
  --wad-text: var(--home-page-text, #0b1220);
  --wad-muted: var(--home-page-muted, rgba(11, 18, 32, .62));
  --wad-blue: var(--home-page-blue, #1557ff);
  --wad-green: var(--home-page-green, #16c995);
  --wad-amber: var(--home-page-amber, #ffb841);
  --wad-red: var(--home-page-red, #ff4d4d);
  --wad-radius-lg: var(--home-page-radius-lg, 22px);
  --wad-radius-md: var(--home-page-radius-md, 16px);
  --wad-radius-sm: var(--home-page-radius-sm, 12px);
  --wad-shadow: var(--home-page-shadow, 0 12px 30px rgba(10, 20, 40, .10), 0 2px 8px rgba(10, 20, 40, .06));
  --wad-shadow-soft: var(--home-page-shadow-soft, 0 10px 25px rgba(10, 20, 40, .08), 0 2px 10px rgba(10, 20, 40, .04));
  --wad-max: var(--home-page-max, 1200px);
}

/* ============================================
   LAYOUT
   ============================================ */

.wad-container {
  min-height: 100vh;
  color: var(--wad-text);
}

.wad-container-inner {
  width: min(var(--wad-max), calc(100% - 40px));
  margin: 0 auto;
}

/* ============================================
   BREADCRUMBS
   ============================================ */

.wad-breadcrumbs {
  padding: 14px 0;
  border-bottom: 1px solid var(--wad-border);
  background: linear-gradient(to bottom, rgba(247,249,255,.9), rgba(247,249,255,.65));
  backdrop-filter: blur(12px);
}

.wad-breadcrumb-list {
  display: flex;
  align-items: center;
  gap: 10px;
  list-style: none;
  padding: 0;
  margin: 0;
  flex-wrap: wrap;
  color: var(--wad-muted);
  font-weight: 700;
  font-size: 14px;
}

.wad-breadcrumb-item {
  display: flex;
  align-items: center;
  gap: 10px;
}

.wad-breadcrumb-link {
  color: rgba(11,18,32,.82);
  padding: 8px 10px;
  border-radius: 12px;
  transition: background .15s ease, transform .15s ease;
  text-decoration: none;
}

.wad-breadcrumb-link:hover {
  background: rgba(21,87,255,.08);
  transform: translateY(-1px);
}

.wad-breadcrumb-separator {
  color: rgba(11,18,32,.45);
}

.wad-breadcrumb-current {
  color: rgba(11,18,32,.82);
  font-weight: 900;
}

/* ============================================
   HEADER
   ============================================ */

.wad-header {
  text-align: center;
  margin: 32px 0 40px;
  padding: 0 20px;
}

.wad-header h1 {
  font-size: clamp(28px, 3.6vw, 44px);
  margin-bottom: 8px;
  letter-spacing: -0.04em;
  line-height: 1.06;
  font-weight: 800;
}

.wad-date {
  color: var(--wad-muted);
  font-size: 14px;
  font-weight: 600;
}

/* ============================================
   MAIN CONTENT
   ============================================ */

.wad-main {
  padding: 0 20px 48px;
}

.wad-main > .wad-container-inner {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 18px;
  align-items: start;
}

.wad-sidebar {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

@media (max-width: 980px) {
  .wad-main > .wad-container-inner {
    grid-template-columns: 1fr;
  }
}

/* ============================================
   CARDS
   ============================================ */

.wad-card {
  background: var(--wad-surface);
  border: 1px solid var(--wad-border);
  border-radius: var(--wad-radius-lg);
  box-shadow: var(--wad-shadow-soft);
  padding: 24px;
  overflow: hidden;
}

@media (max-width: 640px) {
  .wad-card {
    padding: 20px;
  }
}


.wad-primary-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 18px;
  border-radius: 14px;
  background: rgba(21,87,255,.20);
  border: 1px solid rgba(21,87,255,.30);
  color: var(--wad-text);
  text-decoration: none;
  font-weight: 800;
  font-size: 14px;
  transition: all .15s ease;
  box-shadow: 0 10px 20px rgba(10,20,40,.08);
}

.wad-primary-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 12px 24px rgba(10,20,40,.12);
  background: rgba(21,87,255,.28);
  border-color: rgba(21,87,255,.40);
}

/* ============================================
   GRADES CARD
   ============================================ */

.wad-grades h3 {
  margin-bottom: 16px;
  font-size: 14px;
  font-weight: 900;
  letter-spacing: -0.01em;
}

.wad-grade-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
}

.wad-grade-list li {
  display: flex;
}

.wad-grade-list li:first-child {
  grid-column: 1 / -1;
}

.wad-grade-list a {
  display: block;
  width: 100%;
  padding: 10px 14px;
  border-radius: 12px;
  text-decoration: none;
  color: var(--wad-text);
  border: 1px solid rgba(21,87,255,.20);
  transition: all .12s ease;
  font-weight: 700;
  font-size: 14px;
  box-shadow: 0 8px 16px rgba(10,20,40,.06);
  text-align: center;
}

.wad-grade-list a:hover {
  background: rgba(21,87,255,.18);
  transform: translateY(-1px);
  border-color: rgba(21,87,255,.30);
  box-shadow: 0 10px 18px rgba(10,20,40,.10);
}

.wad-grade-list a.active {
  background: rgba(22,201,149,.18);
  border-color: rgba(22,201,149,.30);
  font-weight: 900;
  box-shadow: 0 10px 18px rgba(10,20,40,.10);
}

/* ============================================
   VOCABLOCO PROMO CARD
   ============================================ */

.wad-vocabloco-promo {
  background: linear-gradient(135deg, 
    rgba(255,255,255,.98) 0%,
    rgba(240,248,255,.95) 50%,
    rgba(255,255,255,.98) 100%
  );
  border: 1px solid rgba(21,87,255,.15);
  position: relative;
  overflow: hidden;
}

.wad-vocabloco-promo::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(
    ellipse at 20% 50%,
    rgba(21,87,255,.06) 0%,
    transparent 50%
  ),
  radial-gradient(
    ellipse at 80% 50%,
    rgba(22,201,149,.04) 0%,
    transparent 50%
  );
  pointer-events: none;
  z-index: 0;
}

.wad-vocabloco-promo > * {
  position: relative;
  z-index: 1;
}

.wad-vocabloco-promo-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 999px;
  background: linear-gradient(135deg, 
    rgba(21,87,255,.15) 0%,
    rgba(22,201,149,.15) 100%
  );
  border: 1px solid rgba(21,87,255,.2);
  color: #1652D0;
  font-weight: 900;
  font-size: 11px;
  width: fit-content;
  margin-bottom: 12px;
}

.wad-vocabloco-promo-badge i {
  font-size: 14px;
}

.wad-vocabloco-promo-title {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 900;
  letter-spacing: -0.01em;
  line-height: 1.3;
  background: linear-gradient(135deg, #1652D0 0%, #0EB759 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.wad-vocabloco-promo-text {
  margin: 0 0 14px;
  font-size: 13px;
  line-height: 1.5;
  color: rgba(11, 18, 32, .7);
  font-weight: 500;
}

.wad-vocabloco-promo-actions {
  display: flex;
  gap: 8px;
}

.wad-vocabloco-promo-actions .wad-primary-btn {
  flex: 1;
  justify-content: center;
  font-size: 13px;
  padding: 10px 14px;
  display: flex;
  align-items: center;
  gap: 6px;
}

/* ============================================
   PREVIOUS WORDS
   ============================================ */

.wad-previous {
  padding: 0 20px 64px;
}

.wad-previous h2 {
  text-align: center;
  margin-bottom: 24px;
  font-size: clamp(20px, 2.5vw, 28px);
  letter-spacing: -0.02em;
  font-weight: 800;
}

.wad-previous-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
}

.wad-prev-card {
  background: var(--wad-surface);
  border: 1px solid var(--wad-border);
  border-radius: var(--wad-radius-md);
  padding: 20px;
  box-shadow: var(--wad-shadow-soft);
  transition: transform .12s ease, box-shadow .12s ease;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.wad-prev-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--wad-shadow);
}

.wad-prev-card h4 {
  margin-bottom: 0px;
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.wad-prev-card h4 a {
  color: var(--wad-text);
  text-decoration: none;
  transition: color .15s ease;
}

.wad-prev-card h4 a:hover {
  color: var(--wad-blue);
}

.wad-prev-card span {
  font-size: 12px;
  color: var(--wad-muted);
  font-weight: 600;
}

.wad-prev-card p {
  font-size: 14px;
  margin: 10px 0 14px;
  line-height: 1.5;
  color: var(--wad-text);
}

.wad-prev-card p dfn {
  font-style: italic;
  color: var(--wad-green);
  font-weight: 700;
}

.wad-prev-card--more {
  background: rgba(21,87,255,.08);
  border: 2px dashed rgba(21,87,255,.25);
  text-align: center;
  justify-content: center;
}

.wad-prev-card--more h4 a {
  color: var(--wad-blue);
}


/* ============================================
   EMPTY STATE
   ============================================ */

.wad-empty-state {
  text-align: center;
  padding: 60px 20px;
}

.wad-empty-state h2 {
  font-size: 24px;
  margin-bottom: 12px;
  color: var(--wad-text);
  font-weight: 800;
  letter-spacing: -0.02em;
}

.wad-empty-state p {
  color: var(--wad-muted);
  margin-bottom: 24px;
  font-size: 16px;
}

.wad-empty .wad-empty-state {
  min-height: 300px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 900px) {
  .wad-main > .wad-container-inner {
    grid-template-columns: 1fr;
  }
  
  .wad-previous-grid {
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  }
}

@media (max-width: 640px) {
  .wad-header {
    margin: 24px 0 32px;
  }
  
  .wad-main {
    padding-bottom: 32px;
  }
  
  .wad-previous {
    padding-bottom: 48px;
  }
  
  .wad-grade-list {
    grid-template-columns: 1fr;
  }
}