/* Lesson 2-1: Tägliche Wörter — uses tokens from style.css */

.lesson-page {
  min-height: 100vh;
  background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-surface) 100%);
}

.lesson-back {
  padding-top: 1rem;
}

.lesson-back a {
  font-weight: 600;
  font-size: 0.9375rem;
}

.lesson-main {
  padding: clamp(1.25rem, 4vw, 2.5rem) 0
    calc(clamp(3rem, 8vw, 5rem) + 5rem + env(safe-area-inset-bottom, 0px));
}

.lesson-card {
  max-width: 520px;
  margin-inline: auto;
  margin-bottom: 0.5rem;
  padding: clamp(1.35rem, 4vw, 1.85rem);
  background: var(--color-bg);
  border: 1px solid rgba(26, 46, 40, 0.1);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.lesson-sticker {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 3rem;
  height: 3rem;
  margin-bottom: 1rem;
  font-size: 1.75rem;
  line-height: 1;
  background: var(--color-accent-soft);
  border-radius: 12px;
  border: 1px solid rgba(13, 143, 110, 0.12);
  user-select: none;
}

.lesson-vocab {
  padding: 1.1rem 1.15rem;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.72);
  border: 1px dashed rgba(26, 46, 40, 0.2);
}

.lesson-word-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
}

.lesson-word-de {
  margin: 0;
  font-size: 1.28rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.3;
  color: var(--color-text);
}

.lesson-word-fa {
  margin: 0;
  font-family: "Vazirmatn", "Tahoma", sans-serif;
  font-size: 1.12rem;
  font-weight: 600;
  line-height: 1.4;
  color: var(--color-accent-dark);
  text-align: end;
  flex-shrink: 0;
}

.lesson-examples {
  margin-top: 0.85rem;
  padding-top: 0.85rem;
  border-top: 1px solid rgba(26, 46, 40, 0.1);
}

.lesson-example {
  margin: 0;
  font-size: 0.98rem;
  line-height: 1.55;
  color: var(--color-text-muted);
}

.lesson-example + .lesson-example {
  margin-top: 0.65rem;
  padding-top: 0.65rem;
  border-top: 1px solid rgba(26, 46, 40, 0.08);
}

.lesson-example-label {
  font-weight: 600;
  color: var(--color-text);
  margin-inline-end: 0.25rem;
}

.lesson-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
  margin-top: 1.25rem;
}

/* Fixed bar: buttons stay in place when example text length changes */
.lesson-page .lesson-nav {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 40;
  margin-top: 0;
  padding: 0.85rem max(1.25rem, calc((100vw - min(520px, calc(100vw - 2.5rem))) / 2));
  padding-bottom: calc(0.85rem + env(safe-area-inset-bottom, 0px));
  background: color-mix(in srgb, var(--color-bg) 94%, #fff);
  border-top: 1px solid rgba(26, 46, 40, 0.1);
  box-shadow: 0 -6px 28px rgba(26, 46, 40, 0.07);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.lesson-nav-btn {
  min-width: 7rem;
}

.lesson-nav-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.lesson-nav-btn.btn-primary:disabled:hover {
  transform: none;
}

.lesson-nav-btn.btn-outline:disabled:hover {
  transform: none;
}