.lessons-page {
  max-width: 1280px;
  margin: 0 auto;
  padding: 35px 5vw 60px;
}

/* ── Page header ─────────────────────────────────────────────── */
.lessons-head {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 60px;
  align-items: end;
  margin-bottom: 52px;
}
.lessons-head .illo { width: 100%; max-width: 340px; aspect-ratio: 1 / 1; }
.lessons-head .meta {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ink-dim);
  display: inline-flex; gap: 10px; align-items: center;
  margin-bottom: 22px;
}
.lessons-head .meta .pin {
  width: 14px; height: 14px; border-radius: 50%;
  background: var(--riso-green);
  box-shadow: 2px 2px 0 var(--riso-pink);
}
.lessons-head h1 {
  font-size: clamp(40px, 5vw, 72px);
  line-height: 1;
  letter-spacing: -0.03em;
  font-weight: 600;
  max-width: 22ch;
  text-wrap: balance;
  margin-bottom: 18px;
}
.lessons-head h1 em {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
  color: var(--riso-green);
  text-shadow: 2px 1px 0 var(--riso-pink);
}
.lessons-head .lede {
  font-size: 18px;
  color: var(--ink-dim);
  max-width: 56ch;
  line-height: 1.55;
}

/* ── Filter bar ──────────────────────────────────────────────── */
.lessons-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 20px 32px;
  align-items: center;
  margin-bottom: 30px;
  padding: 18px 22px;
  background: var(--paper-white);
  border: 1.5px solid var(--ink);
  border-radius: 16px;
  box-shadow: 3px 3px 0 var(--riso-pink);
}
.lessons-filter-group {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.lessons-filter-label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-faint);
  white-space: nowrap;
  margin-right: 2px;
}
.lessons-chip {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.05em;
  color: var(--ink-dim);
  background: var(--paper);
  border: 1.5px solid var(--line-strong);
  border-radius: 999px;
  padding: 5px 13px;
  cursor: pointer;
  transition: background 0.13s, color 0.13s, border-color 0.13s, box-shadow 0.13s;
  white-space: nowrap;
}
.lessons-chip:hover {
  color: var(--ink);
  border-color: var(--ink);
}
.lessons-chip[aria-pressed="true"] {
  background: var(--riso-green);
  border-color: var(--riso-green);
  color: var(--paper-white);
  box-shadow: 2px 2px 0 var(--riso-pink);
}

/* ── Sort + count bar ────────────────────────────────────────── */
.lessons-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 22px;
}
.lessons-count {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-dim);
}
.lessons-sort {
  display: inline-flex;
  gap: 0;
  border: 1.5px solid var(--ink);
  border-radius: 999px;
  padding: 3px;
  background: var(--paper-white);
  box-shadow: 2px 2px 0 var(--riso-green);
}
.lessons-sort-btn {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--ink-dim);
  background: transparent;
  border: 0;
  padding: 5px 14px;
  border-radius: 999px;
  cursor: pointer;
  transition: background 0.13s, color 0.13s;
}
.lessons-sort-btn:hover { color: var(--ink); }
.lessons-sort-btn.active {
  background: var(--riso-green);
  color: var(--paper-white);
}

/* ── Lesson grid ─────────────────────────────────────────────── */
.lessons-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

/* ── Lesson card ─────────────────────────────────────────────── */
.lesson-card {
  position: relative;
  display: flex;
  flex-direction: column;
  background: var(--paper-white);
  border: 1.5px solid var(--ink);
  border-radius: 18px;
  padding: 22px 24px 20px;
  box-shadow: 3px 3px 0 var(--riso-pink);
  text-decoration: none;
  color: var(--ink);
  overflow: hidden;
  transition: transform 0.18s, box-shadow 0.18s;
}
.lesson-card::after {
  content: "";
  position: absolute; inset: 0;
  background-image: url("/img/grain.svg");
  background-repeat: repeat;
  mix-blend-mode: multiply;
  opacity: 0.28;
  pointer-events: none;
  border-radius: inherit;
}
.lesson-card > * { position: relative; z-index: 1; }
.lesson-card:nth-child(2n) { box-shadow: 3px 3px 0 var(--riso-green); }
.lesson-card:hover {
  transform: translateY(-3px);
  box-shadow: 3px 3px 0 var(--riso-green), 0 12px 28px rgba(255, 126, 182, 0.18);
}
.lesson-card:nth-child(2n):hover {
  box-shadow: 3px 3px 0 var(--riso-pink), 0 12px 28px rgba(45, 184, 118, 0.18);
}

.lesson-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 18px;
}
.lesson-card-code {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--paper-white);
  background: var(--ink);
  padding: 4px 11px;
  border-radius: 999px;
}
.lesson-card-badge {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--riso-green-deep);
  background: var(--paper);
  border: 1.5px solid var(--riso-green);
  padding: 3px 9px;
  border-radius: 999px;
  box-shadow: 1.5px 1.5px 0 var(--riso-green);
}
.lesson-card-badge.exam { color: var(--riso-pink-deep); border-color: var(--riso-pink); box-shadow: 1.5px 1.5px 0 var(--riso-pink); }

.lesson-card h3 {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: clamp(22px, 2.2vw, 28px);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.01em;
  margin-bottom: 8px;
}
.lesson-card-sub {
  font-size: 13px;
  color: var(--ink-dim);
  line-height: 1.45;
  flex: 1;
}

.lesson-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 20px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}
.lesson-card-type {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-faint);
}
.lesson-card-arrow {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--ink-dim);
  transition: transform 0.18s, color 0.18s;
}
.lesson-card:hover .lesson-card-arrow {
  color: var(--riso-green);
  transform: translateX(4px);
}

/* ── Empty state ─────────────────────────────────────────────── */
.lessons-empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: 80px 24px;
  border: 1.5px dashed var(--ink);
  border-radius: 18px;
  background: var(--paper-white);
  color: var(--ink-dim);
  font-size: 18px;
  font-style: italic;
}

/* ── Responsive ─────────────────────────────────────────────── */
@media (max-width: 1060px) {
  .lessons-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 900px) {
  .lessons-head { grid-template-columns: 1fr; gap: 32px; }
  .lessons-head .illo { max-width: 240px; }
}
@media (max-width: 640px) {
  .lessons-grid { grid-template-columns: 1fr; }
  .lessons-page { padding: 30px 5vw 40px; }
  .lessons-head h1 { font-size: clamp(28px, 9vw, 42px); }
  .lessons-head .lede { font-size: 15px; }
  .lessons-filters { gap: 14px 20px; padding: 14px 16px; }
}

/* ── Resources page: lessons hub tile ───────────────────────── */
.lessons-hub-tile {
  position: relative;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 24px 36px;
  align-items: start;
  background: var(--paper-white);
  border: 1.5px solid var(--ink);
  border-radius: 18px;
  padding: 26px 30px;
  box-shadow: 3px 3px 0 var(--riso-green);
  margin-bottom: 28px;
  overflow: hidden;
}
.lessons-hub-tile::after {
  content: "";
  position: absolute; inset: 0;
  background-image: url("/img/grain.svg");
  background-repeat: repeat;
  mix-blend-mode: multiply;
  opacity: 0.26;
  pointer-events: none;
  border-radius: inherit;
}
.lessons-hub-tile > * { position: relative; z-index: 1; }
.lessons-hub-tile-label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--riso-green-deep);
  background: var(--paper);
  border: 1.5px solid var(--riso-green);
  padding: 3px 11px;
  border-radius: 999px;
  display: inline-block;
  margin-bottom: 12px;
  box-shadow: 1.5px 1.5px 0 var(--riso-green);
}
.lessons-hub-tile h2 {
  font-size: clamp(22px, 2.4vw, 30px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  font-weight: 600;
  margin-bottom: 10px;
}
.lessons-hub-tile h2 em {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
  color: var(--riso-green);
  text-shadow: 1.5px 1px 0 var(--riso-pink);
}
.lessons-hub-tile-desc {
  font-size: 14px;
  color: var(--ink-dim);
  line-height: 1.5;
  max-width: 52ch;
  margin-bottom: 18px;
}
.lessons-hub-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--paper-white);
  background: var(--ink);
  border: 1.5px solid var(--ink);
  padding: 9px 20px;
  border-radius: 999px;
  text-decoration: none;
  transition: background 0.14s, color 0.14s, box-shadow 0.14s;
}
.lessons-hub-link:hover {
  background: var(--riso-green);
  border-color: var(--riso-green);
  box-shadow: 2px 2px 0 var(--riso-pink);
}
.lessons-hub-preview {
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 200px;
}
.lessons-hub-preview-item {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--paper);
  border: 1.5px solid var(--line-strong);
  border-radius: 10px;
  padding: 8px 12px;
  font-size: 12px;
  color: var(--ink-dim);
  text-decoration: none;
  transition: border-color 0.14s, color 0.14s, box-shadow 0.14s;
}
a.lessons-hub-preview-item:hover {
  border-color: var(--riso-green);
  color: var(--ink);
  box-shadow: 2px 2px 0 var(--riso-green);
}
.lessons-hub-preview-code {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: var(--ink);
  color: var(--paper-white);
  padding: 2px 7px;
  border-radius: 999px;
  white-space: nowrap;
  flex-shrink: 0;
}
.lessons-hub-preview-more {
  color: var(--ink-faint);
  font-style: italic;
}

@media (max-width: 700px) {
  .lessons-hub-tile { grid-template-columns: 1fr; }
  .lessons-hub-preview { display: none; }
}