/* ===== Reset & Base ===== */
* {
    margin: 0;
    padding:  0;
    box-sizing: border-box;
}

:root {
    /* Colors */
    --bg-primary: #1a1d23;
    --bg-secondary: #252930;
    --bg-tertiary:  #2f3541;
    --text-primary: #e8eaed;
    --text-secondary: #9aa0a6;
    --text-ghost: #5f6368;
    --accent-primary: #8ab4f8;
    --accent-secondary: #4285f4;
    --unigram-color: #34a853;
    --bigram-color:  #f5576c;
    --trigram-color: #00f2fe;
    
    /* Spacing */
    --spacing-xs: 8px;
    --spacing-sm: 12px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    
    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.15);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.3);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    background:  linear-gradient(135deg, #1a1d23 0%, #252930 100%);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
}

/* ===== App Container ===== */
.app-container {
    max-width:  1600px;
    margin: 0 auto;
    padding: var(--spacing-lg);
}

/* ===== Header ===== */
.app-header {
    text-align: center;
    padding: var(--spacing-lg) 0;
    margin-bottom: var(--spacing-lg);
    border-bottom: 2px solid var(--bg-tertiary);
}

.header-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.app-title {
    font-size: 2.2rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: flex;
    align-items: center;
    justify-content: center;
    gap:  var(--spacing-md);
}

.icon {
    font-size: 2.2rem;
    -webkit-text-fill-color: initial;
}

.app-subtitle {
    font-size: 0.95rem;
    color: var(--text-secondary);
    letter-spacing: 0.5px;
}

/* ===== Main Content ===== */
.main-content {
    display:  flex;
    flex-direction:  column;
    gap: var(--spacing-lg);
}

/* ===== Editor Section ===== */
.editor-section {
    width: 100%;
}

.editor-container {
    background: var(--bg-secondary);
    border-radius:  var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
}

.editor-wrapper {
    position: relative;
    width: 100%;
    min-height: 300px;
}

.editor-layer {
    font-family: 'Courier New', 'Consolas', monospace;
    font-size: 20px;
    line-height:  1.8;
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    border: 2px solid var(--bg-tertiary);
    width: 100%;
    min-height: 300px;
    resize: vertical;
    background:  transparent;
    white-space:  pre-wrap;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

/* Ghost Layer (Suggestion) */
.ghost-layer {
    position: absolute;
    top: 0;
    left: 0;
    z-index: 1;
    color: var(--text-ghost);
    pointer-events: none;
    border-color: transparent;
    overflow: hidden;
}

/* User Layer (Input) */
.user-layer {
    position: relative;
    z-index: 2;
    color: var(--text-primary);
    background: rgba(47, 53, 65, 0.5);
    outline: none;
    transition: border-color 0.3s ease;
}

.user-layer:focus {
    border-color:  var(--accent-primary);
    background: rgba(47, 53, 65, 0.7);
}

.user-layer::placeholder {
    color:  var(--text-secondary);
    opacity: 0.5;
}

.editor-hint {
    margin-top: var(--spacing-md);
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

kbd {
    background: var(--bg-tertiary);
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--text-ghost);
    font-family: inherit;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent-primary);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

/* ===== Probabilities Section ===== */
.probabilities-section {
    width: 100%;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-title {
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.section-description {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.probabilities-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

/* ===== Probability Cards ===== */
.probability-card {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-md);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.probability-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--bg-tertiary);
    margin-bottom: var(--spacing-sm);
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.header-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.gram-badge {
    font-size: 0.65rem;
    font-weight: 800;
    padding: 5px 10px;
    border-radius: 20px;
    text-transform: uppercase;
    letter-spacing: 1px;
    box-shadow: var(--shadow-sm);
}

.unigram-badge {
    background:  linear-gradient(135deg, #52c234 0%, var(--unigram-color) 100%);
    color: white;
}

.bigram-badge {
    background: linear-gradient(135deg, #f093fb 0%, var(--bigram-color) 100%);
    color: white;
}

.trigram-badge {
    background: linear-gradient(135deg, #4facfe 0%, var(--trigram-color) 100%);
    color: white;
}

.card-title {
    font-size: 0.9rem;
    font-weight:  600;
    color: var(--text-primary);
}

.context-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.context-word {
    color: var(--accent-primary);
    font-family: 'Courier New', monospace;
    font-weight: 700;
}

.card-body {
    min-height: 200px;
}

/* ===== Predictions List ===== */
.predictions-list {
    display: flex;
    flex-direction: column;
    gap:  var(--spacing-xs);
}

.prediction-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm) var(--spacing-sm);
    background: rgba(138, 180, 248, 0.08);
    border-radius: var(--radius-md);
    transition: all 0.2s ease;
    border-left: 3px solid transparent;
}

.prediction-item:hover {
    background: rgba(138, 180, 248, 0.15);
    transform: translateX(6px);
    border-left-color:  var(--accent-primary);
}

.prediction-item.top-choice {
    background: rgba(138, 180, 248, 0.15);
    border-left-color: var(--accent-primary);
}

.word-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.word-rank {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    font-size: 0.65rem;
    font-weight: 700;
    padding: 3px 7px;
    border-radius: var(--radius-sm);
    min-width: 26px;
    text-align: center;
}

.word-text {
    font-family: 'Courier New', monospace;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
}

.probability-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    min-width: 150px;
}

.probability-bar-container {
    flex: 1;
    height: 7px;
    background: var(--bg-tertiary);
    border-radius: 4px;
    overflow: hidden;
}

.probability-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    border-radius: 4px;
    transition: width 0.4s ease;
}

.probability-value {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--accent-primary);
    min-width: 45px;
    text-align: right;
}

.no-data {
    text-align: center;
    padding: var(--spacing-lg);
    color: var(--text-secondary);
    font-style: italic;
    font-size: 0.9rem;
}

/* ===== Info Banner ===== */
.info-banner {
    background: rgba(138, 180, 248, 0.1);
    border: 1px solid rgba(138, 180, 248, 0.3);
    border-radius:  var(--radius-md);
    padding: var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    text-align: center;
}

.info-icon {
    font-size: 1.2rem;
}

.info-text {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.info-text strong {
    color: var(--accent-primary);
    font-weight: 600;
}

/* ===== Footer ===== */
.app-footer {
    text-align: center;
    padding: var(--spacing-lg) 0;
    margin-top: var(--spacing-lg);
    border-top: 2px solid var(--bg-tertiary);
    color: var(--text-secondary);
    font-size: 0.8rem;
}

/* ===== Responsive Design ===== */
@media (max-width: 1200px) {
    .probabilities-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    }
}

@media (max-width: 768px) {
    .app-title {
        font-size: 1.8rem;
    }
    
    .section-title {
        font-size: 1.4rem;
    }
    
    .editor-layer {
        font-size: 16px;
        min-height: 250px;
    }
    
    .card-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .probabilities-grid {
        grid-template-columns: 1fr;
    }
}