:root {
  color-scheme: light;
  font-family: "Trebuchet MS", Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: linear-gradient(180deg, #eef8ff 0%, #fff8e8 100%);
  color: #1f2937;
}

.app {
  max-width: 980px;
  margin: 0 auto;
  padding: 1.5rem 1rem 2rem;
}

.hero {
  text-align: center;
  margin-bottom: 1rem;
}

.hero h1 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3rem);
  color: #0f5dc2;
}

.hero p {
  margin: 0.4rem 0 0;
  font-size: 1.05rem;
}

.tabs {
  display: flex;
  gap: 0.6rem;
  justify-content: center;
  margin: 1rem 0 1.2rem;
  flex-wrap: wrap;
}

.tab-button {
  border: 1px solid #93c5fd;
  background: #eff6ff;
  color: #1d4ed8;
  border-radius: 999px;
  padding: 0.5rem 1rem;
  font-weight: 700;
  cursor: pointer;
}

.tab-button.is-active {
  background: #1d4ed8;
  color: #ffffff;
}

.letters-track {
  display: flex;
  gap: 0.9rem;
  overflow-x: auto;
  overflow-y: hidden;
  padding: 1rem 0.25rem 1.2rem;
  scroll-snap-type: x mandatory;
}

.letter-card {
  min-width: 220px;
  border: 0;
  border-radius: 18px;
  background: #ffffff;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.09);
  padding: 1rem 0.8rem 1.1rem;
  cursor: pointer;
  scroll-snap-align: center;
  transition: transform 0.14s ease, box-shadow 0.14s ease;
}

.letter-card:hover,
.letter-card:focus-visible {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.14);
  outline: 3px solid #60a5fa;
}

.letter-card.is-speaking {
  background: #dbeafe;
}

.letter-hebrew {
  margin: 0;
  direction: rtl;
  font-size: clamp(3.8rem, 7vw, 5.2rem);
  line-height: 1;
  color: #0f172a;
}

.letter-name {
  margin: 0.5rem 0 0;
  font-size: 1.4rem;
  font-weight: 700;
  color: #0f5dc2;
}

.letter-pronounce {
  margin: 0.2rem 0 0;
  font-size: 1rem;
  color: #4b5563;
}

.letter-word {
  margin: 0.45rem 0 0;
  font-size: 0.95rem;
  font-weight: 600;
  color: #1f2937;
}

.letter-definition {
  margin: 0.2rem 0 0;
  font-size: 0.9rem;
  color: #374151;
}

.note {
  text-align: center;
  margin: 0.5rem 0 0;
  font-size: 1rem;
  font-weight: 600;
}

.gematria-card {
  max-width: 720px;
  margin: 0 auto;
  background: #ffffff;
  border-radius: 16px;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.09);
  padding: 1rem;
}

.gematria-label {
  display: block;
  font-weight: 700;
  margin-bottom: 0.35rem;
}

.gematria-input {
  width: 100%;
  border: 1px solid #cbd5e1;
  border-radius: 12px;
  padding: 0.7rem;
  font-size: 1rem;
  font-family: inherit;
  resize: vertical;
}

.gematria-button {
  margin-top: 0.65rem;
  border: 0;
  border-radius: 10px;
  background: #0f5dc2;
  color: #ffffff;
  padding: 0.55rem 1rem;
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
}

.gematria-total,
.gematria-script {
  margin: 0.7rem 0 0;
  font-weight: 700;
}

.gematria-heading {
  margin: 1rem 0 0.4rem;
  font-size: 1.1rem;
  color: #1e3a8a;
}

.gematria-list {
  margin: 0;
  padding-left: 1.2rem;
}

.gematria-list li {
  margin: 0.2rem 0;
}

@media (max-width: 768px) {
  .letters-track.is-mobile-single {
    flex-direction: column;
    gap: 0;
    height: 62vh;
    overflow-x: hidden;
    overflow-y: auto;
    padding: 0;
    scroll-snap-type: y mandatory;
  }

  .letters-track.is-mobile-single .letter-card {
    width: 100%;
    min-width: 100%;
    min-height: 62vh;
    border-radius: 0;
    display: grid;
    place-content: center;
    text-align: center;
    scroll-snap-align: start;
  }
}