/* General Styles */
:root {
    --primary-color: #007bff;
    --secondary-color: #6c757d;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #17a2b8;
    --light-color: #f8f9fa;
    --dark-color: #343a40;
    --white-color: #fff;
    --border-color: #dee2e6;
    --red-ball-color: #dc3545;
    --blue-ball-color: #007bff;
    --selected-text-color: #fff;
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --border-radius: 0.3rem;
    --box-shadow: 0 2px 10px rgba(0,0,0,0.075);
}

body {
    font-family: var(--font-family);
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background-color: #e9ecef; /* Light gray background */
    color: var(--dark-color);
}

.container {
    max-width: 960px;
    margin: 20px auto;
    padding: 15px;
}

header {
    text-align: center;
    margin-bottom: 25px;
    color: var(--primary-color);
}
header h1 {
    font-size: 1.8rem;
    font-weight: 500;
}

/* Card Style */
.card {
    background-color: var(--white-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    margin-bottom: 20px;
    padding: 20px;
    box-shadow: var(--box-shadow);
}

.card h2 {
    font-size: 1.4rem;
    color: var(--primary-color);
    margin-top: 0;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
    font-weight: 500;
}
.card h3 {
    font-size: 1.1rem;
    color: var(--secondary-color);
    margin-top: 0;
    margin-bottom: 10px;
    font-weight: 500;
}
.card h4 {
    font-size: 1.1rem;
    color: var(--success-color);
     margin-top: 0;
     margin-bottom: 10px;
}

.card-inset {
    background-color: var(--light-color);
    padding: 15px;
    border-radius: var(--border-radius);
    border: 1px solid #e3e3e3;
    margin-top: 15px;
}

/* Selection Area */
.bet-type-selector {
    margin-bottom: 20px;
    text-align: center;
}
.bet-type-selector label {
    margin-right: 8px;
    font-weight: 500;
}
.bet-type-selector select {
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    min-width: 150px;
}

.number-panel {
    display: flex;
    flex-wrap: wrap; /* Allow zones to wrap on small screens */
    gap: 20px; /* Space between front and back zones */
    margin-bottom: 20px;
}

.number-zone {
    flex: 1; /* Each zone tries to take equal space */
    min-width: 280px; /* Minimum width before wrapping */
    border: 1px solid var(--border-color);
    padding: 15px;
    border-radius: var(--border-radius);
    background-color: #fdfdfd;
}
.zone-hint {
    font-size: 0.85em;
    color: var(--secondary-color);
    font-weight: normal;
}
.section-label {
    font-size: 0.9em;
    color: #555;
    margin-bottom: 8px;
}

/* Number Grid */
.number-grid {
    display: grid;
    gap: 6px 8px; /* Row gap, Column gap */
}
.front-grid {
    grid-template-columns: repeat(auto-fill, minmax(40px, 1fr)); /* Responsive columns */
}
.back-grid {
     grid-template-columns: repeat(auto-fill, minmax(40px, 1fr));
}


.number-btn {
    padding: 8px 0; /* Adjusted padding */
    border: 1px solid #ccc;
    background-color: var(--white-color);
    color: #333;
    text-align: center;
    cursor: pointer;
    border-radius: 50%; /* Circle buttons */
    transition: all 0.2s ease-in-out;
    font-weight: bold;
    min-width: 38px; /* Ensure consistent size */
    height: 38px;
    display: inline-flex; /* Center content vertically */
    align-items: center;
    justify-content: center;
    font-size: 0.95rem;
    box-shadow: 0 1px 2px rgba(0,0,0,0.1);
}

.number-btn:hover {
    border-color: #aaa;
    transform: translateY(-1px);
    box-shadow: 0 2px 4px rgba(0,0,0,0.15);
}

.number-btn.selected {
    background-color: var(--red-ball-color);
    color: var(--selected-text-color);
    border-color: var(--red-ball-color);
}
/* Specific override for selected back numbers */
.back-grid .number-btn.selected {
     background-color: var(--blue-ball-color);
     border-color: var(--blue-ball-color);
}


.number-btn.banker {
    background-color: var(--warning-color);
    color: #333;
    border: 2px solid var(--warning-color); /* Thicker border for distinction */
    /* Ensure banker color overrides selected color if both applied (though logic should prevent this) */
    box-shadow: 0 0 5px rgba(255, 193, 7, 0.5);
}

.number-btn.drag {
    /* Slightly different style for drag, maybe just border? */
     border: 2px dashed var(--info-color);
     background-color: var(--light-color);
     color: var(--info-color);
}

/* Banker/Drag Sections */
.banker-section, .drag-section {
    margin-bottom: 15px;
    padding: 10px;
    border: 1px dashed #ccc;
    border-radius: 4px;
    background-color: #f9f9f9;
}
.banker-section p, .drag-section p {
    margin-top: 0;
    margin-bottom: 10px;
    font-weight: bold;
    color: #444;
    font-size: 0.9em;
}


/* Controls & Buttons */
.controls {
    margin-top: 20px;
    margin-bottom: 10px;
    text-align: center;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
}

.btn {
    padding: 10px 15px;
    font-size: 0.95rem;
    border-radius: var(--border-radius);
    border: none;
    cursor: pointer;
    transition: background-color 0.2s ease, box-shadow 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 5px; /* Space between icon and text */
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}
.btn:hover {
     opacity: 0.9;
     box-shadow: 0 2px 5px rgba(0,0,0,0.15);
 }
.btn:disabled {
     opacity: 0.6;
     cursor: not-allowed;
 }
.btn-sm {
    padding: 6px 10px;
    font-size: 0.85rem;
}

.btn-primary { background-color: var(--primary-color); color: var(--white-color); }
.btn-success { background-color: var(--success-color); color: var(--white-color); }
.btn-danger { background-color: var(--danger-color); color: var(--white-color); }
.btn-warning { background-color: var(--warning-color); color: #333; }
.btn-info { background-color: var(--info-color); color: var(--white-color); }

/* Results Display */
.results {
    margin-top: 20px;
}
.results p {
    margin: 8px 0;
}
.selected-numbers-display, .bet-cost-display {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin-bottom: 8px;
}
.num-display {
    font-weight: bold;
    letter-spacing: 1px;
    display: inline-block; /* Prevent wrapping within number group */
}
#selectedFrontDisplay { color: var(--red-ball-color); }
#selectedBackDisplay { color: var(--blue-ball-color); }

#betCount, #totalCost, #listTotalBets, #listTotalCost, #totalWinnings {
    font-weight: bold;
    color: var(--success-color);
}

.error-msg {
    color: var(--danger-color);
    font-weight: bold;
    font-size: 0.9em;
    margin-top: 10px;
    min-height: 1.2em; /* Prevent layout shift */
}

/* Prize Calculator Area */
.prize-calculator-area {
    /* Styles specific to this section if needed */
}
.winning-numbers-input {
    margin-bottom: 20px;
}
.winning-input-group {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
    margin-top: 10px;
}
.winning-input-group label {
    font-weight: 500;
    margin-bottom: 5px;
    flex-basis: 100%; /* Label takes full width */
}
.winning-input-group span {
    white-space: nowrap;
}
.winning-input-group input[type="text"] {
    padding: 8px 10px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    flex-grow: 1; /* Input takes available space */
    min-width: 120px; /* Prevent getting too small */
}
#prizeResultArea {
    /* Styles for results area */
}
#prizeBreakdown p {
    margin: 4px 0;
    font-size: 0.95em;
}
#prizeBreakdown .prize-tier {
    font-weight: 500;
    color: var(--secondary-color);
}
#prizeBreakdown .prize-count {
    color: var(--primary-color);
}
#prizeBreakdown .prize-amount {
    color: var(--success-color);
}


/* Bet List Section */
#betList {
    width: 100%;
    box-sizing: border-box;
    margin-bottom: 15px;
    background-color: #f0f0f0; /* Slightly off-white */
    border: 1px solid #ccc;
    padding: 10px;
    font-family: monospace;
    font-size: 0.9em;
    min-height: 150px;
    border-radius: var(--border-radius);
    color: #333;
}
.list-summary {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 15px;
    margin-top: 10px;
    padding-top: 10px;
    border-top: 1px solid var(--border-color);
}
.list-summary span {
    font-size: 0.95em;
}

/* Footer */
footer {
    text-align: center;
    margin-top: 30px;
    padding-top: 15px;
    border-top: 1px solid var(--border-color);
    font-size: 0.85em;
    color: var(--secondary-color);
}
footer p {
    margin: 5px 0;
}


/* Utility Classes */
.hidden {
    display: none !important; /* Use !important carefully */
}


/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    header h1 {
        font-size: 1.5rem;
    }
    .card {
        padding: 15px;
    }
    .card h2 {
        font-size: 1.2rem;
        margin-bottom: 15px;
    }

    .number-panel {
        flex-direction: column; /* Stack front and back zones */
        gap: 15px;
    }

    .controls {
        gap: 8px;
    }
    .btn {
        padding: 8px 12px;
        font-size: 0.9rem;
    }

    .winning-input-group input[type="text"] {
        min-width: 100px; /* Adjust input size */
    }

    .list-summary {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media (max-width: 480px) {
     header h1 {
        font-size: 1.3rem;
    }
    .card {
        padding: 10px;
    }
    .number-btn {
        min-width: 35px;
        height: 35px;
        font-size: 0.85rem;
    }
    .front-grid, .back-grid {
         gap: 4px 6px;
     }
     .controls {
         justify-content: space-around; /* Better button distribution */
     }
     .btn {
         flex-basis: 48%; /* Roughly 2 buttons per row */
         justify-content: center; /* Center icon/text */
     }
     .selected-numbers-display, .bet-cost-display {
         flex-direction: column;
         gap: 5px;
         align-items: flex-start;
     }
     .winning-input-group {
        flex-direction: column;
        align-items: stretch; /* Make inputs full width */
     }
     .winning-input-group button {
         margin-top: 10px;
         width: 100%; /* Full width button */
     }
}