:root {
    --bg: #ffffff;
    --text: #1a1a1a;
    --text-light: #666666;
    --border: #e0e0e0;
    --border-hover: #b0b0b0;
    --accent: #0066cc;
    --accent-hover: #0052a3;
    --accent-light: #e6f2ff;
    --grid-cell: #f8f9fa;
    --grid-cell-hover: #e9ecef;
    --grid-cell-highlight: #cfe2ff;
    --grid-cell-double: #f0f0f0;
    --shadow: rgba(0, 0, 0, 0.08);
    --shadow-hover: rgba(0, 0, 0, 0.12);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg);
    color: var(--text);
    padding: 1rem;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
}

header {
    text-align: center;
    margin-bottom: 2rem;
    width: 100%;
    padding-top: 1rem;
}

h1 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    font-weight: 600;
    letter-spacing: -0.02em;
}

h2 {
    font-size: 1.3rem;
    margin-bottom: 1.5rem;
    text-align: center;
    font-weight: 600;
    letter-spacing: -0.01em;
}

.tabs {
    display: flex;
    gap: 0.25rem;
    margin-bottom: 2rem;
    border-bottom: 1px solid var(--border);
    justify-content: center;
    width: 100%;
}

.tab-button {
    background: none;
    border: none;
    padding: 0.875rem 1.75rem;
    cursor: pointer;
    font-family: 'Inter', sans-serif;
    font-size: 0.95rem;
    color: var(--text-light);
    border-bottom: 2px solid transparent;
    transition: all 0.2s ease;
    position: relative;
    font-weight: 500;
}

.tab-button:hover {
    color: var(--text);
    background: var(--grid-cell);
}

.tab-button.active {
    color: var(--accent);
    border-bottom-color: var(--accent);
    font-weight: 600;
}

.tab-content {
    display: none;
    width: 100%;
}

.tab-content.active {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.calculator-section {
    margin-bottom: 2rem;
    padding: 2rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    background: var(--bg);
    box-shadow: 0 1px 3px var(--shadow);
}


.grid-section {
    padding: 2rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    background: var(--bg);
    box-shadow: 0 1px 3px var(--shadow);
}

.sum-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
    justify-content: center;
}

.sum-button {
    background: var(--grid-cell);
    border: 1px solid var(--border);
    padding: 0.625rem 1.25rem;
    border-radius: 6px;
    cursor: pointer;
    font-family: 'Inter', sans-serif;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.2s ease;
}

.sum-button:hover {
    background: var(--grid-cell-hover);
    border-color: var(--border-hover);
    transform: translateY(-1px);
    box-shadow: 0 2px 4px var(--shadow);
}

.sum-button.active {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
    box-shadow: 0 2px 6px rgba(0, 102, 204, 0.3);
}

.probability-info {
    text-align: center;
    padding: 1rem;
    background: var(--accent-light);
    border-radius: 6px;
    font-size: 1rem;
    width: 100%;
    font-weight: 500;
    color: var(--accent);
    border: 1px solid rgba(0, 102, 204, 0.2);
}

.bar-entry-controls,
.hit-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 1rem;
    width: 100%;
}

.bearoff-controls {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    width: 100%;
    align-items: center;
    margin-bottom: 1rem;
}

.bearoff-input-group {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    width: 100%;
}

.bearoff-input-group label {
    font-size: 0.95rem;
    color: var(--text-light);
}

.button-group {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
}

.option-button {
    background: var(--grid-cell);
    border: 1px solid var(--border);
    padding: 0.625rem 1.25rem;
    border-radius: 6px;
    cursor: pointer;
    font-family: 'Inter', sans-serif;
    font-size: 0.95rem;
    min-width: 50px;
    transition: all 0.2s ease;
    font-weight: 500;
}

.option-button:hover {
    background: var(--grid-cell-hover);
    border-color: var(--border-hover);
    transform: translateY(-1px);
    box-shadow: 0 2px 4px var(--shadow);
}

.option-button.active {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
    box-shadow: 0 2px 6px rgba(0, 102, 204, 0.3);
}

.bar-entry-result,
.hit-result,
.bearoff-result {
    text-align: center;
    padding: 1.25rem;
    background: var(--accent-light);
    border-radius: 6px;
    font-size: 0.95rem;
    width: 100%;
    border: 1px solid rgba(0, 102, 204, 0.2);
}

.probability-display {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--accent);
    margin-bottom: 0.5rem;
}

.probability-details {
    color: var(--text);
    font-size: 0.9rem;
    margin: 0.25rem 0;
}

.dice-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 2px;
    width: 100%;
    margin: 0 auto;
}

.grid-label {
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.85rem;
    padding: 0.5rem;
    color: var(--accent);
}

.grid-cell {
    aspect-ratio: 1;
    background: var(--grid-cell);
    border: 1px solid var(--border);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 500;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.grid-cell:hover {
    background: var(--grid-cell-hover);
    border-color: var(--border-hover);
    transform: scale(1.05);
    box-shadow: 0 2px 4px var(--shadow);
    z-index: 1;
}

.grid-cell.double {
    background: var(--grid-cell-double);
}

.grid-cell.highlighted {
    background: var(--grid-cell-highlight);
    border-color: var(--accent);
    font-weight: 600;
    box-shadow: 0 2px 8px rgba(0, 102, 204, 0.3);
    z-index: 2;
}

.grid-cell.related {
    background: #d9e6f2;
    border-color: var(--accent);
}

.combinations-table-section {
    margin-top: 2rem;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 2rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--bg);
    box-shadow: 0 1px 3px var(--shadow);
}

.combinations-table {
    width: 100%;
    max-width: 600px;
    border-collapse: collapse;
    margin-top: 1rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    overflow: hidden;
    table-layout: fixed;
}

.combinations-table thead {
    background: var(--grid-cell);
}

.combinations-table th,
.combinations-table td {
    padding: 0.75rem 1rem;
    text-align: center;
    border: 1px solid var(--border);
    vertical-align: middle;
}

.combinations-table th {
    font-weight: 600;
}

.combinations-table td {
    font-size: 0.95rem;
}

.combinations-table tbody tr:nth-child(even) {
    background: var(--grid-cell);
}

.combinations-table tbody tr.highlighted-row {
    background: var(--grid-cell-highlight);
    font-weight: 600;
}

/* Sums table - 3 columns */
#sumsTable th:nth-child(1),
#sumsTable td:nth-child(1) { width: 30%; }
#sumsTable th:nth-child(2),
#sumsTable td:nth-child(2) { width: 30%; }
#sumsTable th:nth-child(3),
#sumsTable td:nth-child(3) { width: 40%; }

/* Bar Entry table - 5 columns */
#barTable { max-width: 700px; }
#barTable th,
#barTable td { width: 20%; }

/* Hit Probability table - 4 columns */
#hitTable th,
#hitTable td { width: 25%; }

/* Shot Odds table - 4 columns */
#shotTable th,
#shotTable td { width: 25%; }

/* Bear-off table - 4 columns */
#bearoffTable { max-width: 700px; }
#bearoffTable th:nth-child(1),
#bearoffTable td:nth-child(1) { width: 22%; }
#bearoffTable th:nth-child(2),
#bearoffTable td:nth-child(2) { width: 22%; }
#bearoffTable th:nth-child(3),
#bearoffTable td:nth-child(3) { width: 28%; }
#bearoffTable th:nth-child(4),
#bearoffTable td:nth-child(4) { width: 28%; }

footer {
    margin-top: 3rem;
    padding: 2rem 1rem;
    text-align: center;
    border-top: 1px solid var(--border);
    color: var(--text-light);
    font-size: 0.875rem;
    width: 100%;
}

footer a {
    color: var(--accent);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s ease;
}

footer a:hover {
    color: var(--accent-hover);
    text-decoration: underline;
}

footer em {
    font-style: italic;
}

footer .motto {
    margin-top: 0.75rem;
    font-style: italic;
    color: var(--text);
    font-weight: 500;
}

.section-description {
    color: var(--text-light);
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
    text-align: center;
}

.point-toggles {
    display: flex;
    gap: 0.5rem;
    justify-content: center;
}

.point-toggle {
    background: var(--grid-cell);
    border: 2px solid var(--border);
    padding: 0.75rem 1.25rem;
    border-radius: 6px;
    cursor: pointer;
    font-family: 'Inter', sans-serif;
    font-size: 1rem;
    font-weight: 600;
    min-width: 50px;
    transition: all 0.2s ease;
    color: var(--text);
}

.point-toggle:hover {
    background: var(--grid-cell-hover);
    border-color: var(--border-hover);
}

.point-toggle.blocked {
    background: #dc3545;
    color: white;
    border-color: #dc3545;
    box-shadow: 0 2px 6px rgba(220, 53, 69, 0.3);
}

.point-toggle.blocked:hover {
    background: #c82333;
    border-color: #c82333;
}

/* Shot Odds Tab */
.shot-controls {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    width: 100%;
    align-items: center;
    margin-bottom: 1rem;
}

.shot-input-group {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    width: 100%;
}

.shot-input-group label {
    font-size: 0.95rem;
    color: var(--text-light);
    font-weight: 500;
}

.shot-result {
    text-align: center;
    padding: 1.25rem;
    background: var(--accent-light);
    border-radius: 6px;
    font-size: 0.95rem;
    width: 100%;
    border: 1px solid rgba(0, 102, 204, 0.2);
}

.shot-note {
    margin-top: 1rem;
    padding: 0.75rem;
    background: var(--grid-cell);
    border-radius: 6px;
    font-size: 0.85rem;
    color: var(--text-light);
    text-align: center;
    width: 100%;
}

.shot-note em {
    font-style: italic;
}

@media (max-width: 768px) {
    body {
        padding: 0.5rem;
    }

    .container {
        width: 100%;
        padding: 0;
    }

    h1 {
        font-size: 1.4rem;
        padding: 0 0.5rem;
    }

    h2 {
        font-size: 1.1rem;
    }

    .tabs {
        flex-wrap: wrap;
        gap: 0;
        justify-content: center;
        padding: 0 0.25rem;
    }

    .tab-button {
        padding: 0.5rem 0.75rem;
        font-size: 0.8rem;
        flex: 1 1 auto;
        min-width: fit-content;
    }

    .tab-content.active {
        padding: 0 0.5rem;
    }

    .calculator-section,
    .grid-section,
    .combinations-table-section {
        padding: 1rem;
        border-radius: 6px;
        width: 100%;
    }


    .sum-buttons {
        gap: 0.35rem;
    }

    .sum-button,
    .option-button {
        padding: 0.5rem 0.75rem;
        font-size: 0.85rem;
        min-width: 40px;
    }

    .button-group {
        gap: 0.35rem;
        justify-content: center;
    }

    .dice-grid {
        width: 100%;
        gap: 1px;
    }

    .grid-cell {
        font-size: 0.7rem;
        border-radius: 2px;
    }

    .grid-label {
        font-size: 0.75rem;
        padding: 0.25rem;
    }

    .probability-info,
    .bar-entry-result,
    .hit-result,
    .bearoff-result {
        padding: 0.75rem;
        font-size: 0.9rem;
    }

    .probability-display {
        font-size: 1rem;
    }

    .probability-details {
        font-size: 0.85rem;
    }

    .bearoff-controls {
        gap: 1rem;
    }

    .bearoff-input-group {
        gap: 0.5rem;
    }

    .bearoff-input-group label {
        font-size: 0.85rem;
    }

    .combinations-table {
        font-size: 0.8rem;
        max-width: 100%;
    }

    .combinations-table th,
    .combinations-table td {
        padding: 0.5rem 0.35rem;
    }
    
    #barTable,
    #bearoffTable,
    #shotTable {
        max-width: 100%;
    }


    footer {
        padding: 1.5rem 1rem;
        font-size: 0.8rem;
    }

    .section-description {
        font-size: 0.85rem;
        padding: 0 0.5rem;
    }
}

@media (max-width: 768px) {
    .point-toggle {
        padding: 0.6rem 0.9rem;
        font-size: 0.9rem;
        min-width: 42px;
    }

    .shot-controls {
        gap: 1rem;
    }

    .shot-input-group {
        gap: 0.5rem;
    }

    .shot-input-group label {
        font-size: 0.85rem;
    }

    .shot-result {
        padding: 0.75rem;
        font-size: 0.9rem;
    }

    .shot-note {
        font-size: 0.8rem;
        padding: 0.5rem;
    }
}

@media (max-width: 480px) {
    .tab-button {
        padding: 0.4rem 0.5rem;
        font-size: 0.75rem;
    }

    .grid-cell {
        font-size: 0.6rem;
    }

    .sum-button,
    .option-button {
        padding: 0.4rem 0.6rem;
        font-size: 0.8rem;
        min-width: 35px;
    }

    .point-toggle {
        padding: 0.5rem 0.7rem;
        font-size: 0.85rem;
        min-width: 38px;
    }

    .point-toggles {
        gap: 0.35rem;
    }
}