:root {
  --bg-color: #FDFBF7;
  --text-main: #122A4E;
  --accent-gold: #C8A161;
  --accent-pink: #E8A9B2;
  --card-grammar-border: #1B355A;
  --card-grammar-bg: #F4ECEE;
  --card-map-border: #C8A161;
  --card-map-bg: #FFFCF2;
  --card-survival-border: #D1AE6D;
  --card-survival-bg: #F1F6FA;
  --card-talk-border: #DD8692;
  --card-talk-bg: #FFFFFF;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Inter', sans-serif;
  background-color: var(--bg-color);
  color: var(--text-main);
  /* A slight paper texture can be added later by the user if desired */
  background-image: radial-gradient(#E8E5DF 1px, transparent 1px);
  background-size: 20px 20px;
  background-position: 0 0, 10px 10px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

#root {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.main-content {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 4rem 0;
}

/* Main Grid */
.services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
  width: 100%;
  max-width: 900px;
}

/* Grammar Section Styles */
.grammar-container {
  width: 100%;
  max-width: 1000px;
  display: flex;
  flex-direction: column;
  gap: 2rem;
  padding: 2rem 0;
}

.back-button {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: none;
  border: 1px solid var(--accent-gold);
  padding: 0.8rem 1.2rem;
  border-radius: 8px;
  color: var(--text-main);
  cursor: pointer;
  width: fit-content;
  transition: all 0.2s ease;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.back-button:hover {
  background-color: var(--accent-gold);
  color: white;
}

.grammar-intro {
  padding: 2rem;
  background-color: var(--card-grammar-bg);
  border-left: 4px solid var(--card-grammar-border);
  border-radius: 8px;
  box-shadow: 0 4px 15px rgba(0,0,0,0.05);
}

.grammar-intro h1 {
  margin-bottom: 1rem;
  color: var(--card-grammar-border);
  font-size: 2rem;
}

.grammar-intro p {
  line-height: 1.6;
  margin-bottom: 1rem;
  font-size: 1.1rem;
}

.grammar-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  width: 100%;
}

/* Responsiveness */
@media (max-width: 768px) {
  .services-grid, .grammar-grid {
    grid-template-columns: 1fr;
  }
  
  .grammar-intro {
    padding: 1.5rem;
  }
}

/* Hiragana Table Styles */
.hiragana-container {
    width: 100%;
    max-width: 1500px;
    display: flex;
    flex-direction: column;
    gap: 2rem;
    padding: 2rem 0;
    margin: 0 auto;
}

.hiragana-header {
    padding: 1.5rem 2rem;
    background-color: #fff;
    border-left: 4px solid var(--accent-pink);
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
}

.hiragana-header h1 {
    margin-bottom: 0.5rem;
    font-size: 1.8rem;
    color: var(--text-main);
}

.hiragana-header p {
    color: #555;
    font-size: 1.1rem;
}

.hiragana-layout {
    display: flex;
    gap: 2rem;
    align-items: flex-start;
}

.hiragana-grid {
    flex: 1;
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 0.8rem;
    max-height: 60vh;
    overflow-y: auto;
    padding-right: 1rem;
}

.hiragana-grid::-webkit-scrollbar {
    width: 6px;
}
.hiragana-grid::-webkit-scrollbar-thumb {
    background-color: var(--accent-pink);
    border-radius: 4px;
}

.hiragana-cell {
    background-color: #fff;
    border: 2px solid #EEE;
    border-radius: 8px;
    padding: 1rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s ease;
    min-height: 80px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.hiragana-cell:hover {
    transform: translateY(-2px);
    border-color: var(--accent-pink);
    box-shadow: 0 4px 10px rgba(232, 169, 178, 0.2);
}

.hiragana-cell.active {
    background-color: var(--accent-pink);
    border-color: var(--card-talk-border);
    color: white;
}

.hiragana-cell .kana {
    font-size: 2rem;
    font-weight: bold;
    line-height: 1;
    margin-bottom: 0.3rem;
}

.hiragana-cell .romaji {
    font-size: 0.9rem;
    opacity: 0.8;
}

.hiragana-detail {
    width: 350px;
    position: sticky;
    top: 2rem;
}

.detail-card {
    background-color: #fff;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0,0,0,0.08);
    border: 1px solid rgba(0,0,0,0.05);
}

.detail-top {
    background-color: var(--accent-pink);
    color: white;
    padding: 3rem 1.5rem;
    text-align: center;
    position: relative;
}

.large-kana {
    font-size: 6rem;
    line-height: 1;
    font-weight: bold;
    margin-bottom: 0.5rem;
    text-shadow: 0 4px 10px rgba(0,0,0,0.1);
}

.large-romaji {
    font-size: 1.5rem;
    font-weight: 500;
    letter-spacing: 2px;
    text-transform: uppercase;
    opacity: 0.9;
}

.detail-strokes {
    padding: 2rem 1.5rem;
}

.strokes-title {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    font-size: 1.2rem;
    margin-bottom: 1.5rem;
    color: var(--text-main);
    border-bottom: 2px solid #EEE;
    padding-bottom: 0.8rem;
}

.steps-container {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.stroke-step {
    padding: 1rem;
    background-color: var(--bg-color);
    border-radius: 8px;
    font-size: 1rem;
    border-left: 3px solid var(--accent-gold);
    opacity: 0;
    transform: translateX(-10px);
    animation: fadeSlideIn 0.5s forwards ease-out;
}

@keyframes fadeSlideIn {
    from {
        opacity: 0;
        transform: translateX(-10px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@media (max-width: 900px) {
    .hiragana-layout {
        flex-direction: column;
    }
    
    .hiragana-detail {
        width: 100%;
        position: static;
    }
    
    .hiragana-grid {
        max-height: 40vh;
    }
}

@media (max-width: 600px) {
    .hiragana-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}