body { background-color: var(--canvas); color: var(--ink);
}

.main-content {
    padding: 20px;
}

.container {
    max-width: 900px;
    margin: 0 auto;
}

h1 {
    font-family: 'Crimson Pro', serif;
    font-size: 2.5rem;
    font-weight: 700; color: var(--info-strong);
    margin-bottom: 1rem;
    text-align: center;
}

.subtitle {
    text-align: center; color: var(--ink-60);
    margin-bottom: 2rem;
    font-size: 1.1rem;
}

.calculator-card { background-color: var(--surface); border-radius: var(--r-sm);
    padding: 2.5rem; box-shadow: none;
    margin-bottom: 2rem;
}

.info-box { background-color: var(--canvas); border-left: 4px solid var(--keyline);
    padding: 1.5rem;
    margin-bottom: 2rem;
    border-radius: var(--r-sm);
}

.info-box p { color: var(--ink-70);
    margin-bottom: 0.5rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

label {
    display: block;
    margin-bottom: 0.5rem; color: var(--ink);
    font-weight: 500;
    font-size: 0.95rem;
}

.optional-label { color: var(--ink-60);
    font-size: 0.85rem;
    font-weight: 400;
    margin-left: 0.5rem;
}

input, select {
    width: 100%;
    padding: 0.75rem; background-color: var(--canvas); border: 2px solid var(--rule); border-radius: var(--r-sm); color: var(--ink);
    font-size: 1rem;
    font-family: 'Work Sans', sans-serif;
    transition: border-color 0.3s ease;
}

input:focus, select:focus {
    outline: none; border-color: var(--keyline);
}

input::placeholder { color: var(--ink-60);
}

.calculate-btn {
    width: 100%;
    padding: 1rem; background-color: var(--ink);
    color: white;
    border: none; border-radius: var(--r-sm);
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s ease;
    font-family: 'Work Sans', sans-serif;
    margin-top: 1rem;
}

.calculate-btn:hover { background-color: var(--ink-strong);
}

.mode-section {
    display: none;
}

.mode-section.active {
    display: block;
}

.results {
    display: none;
    margin-top: 2rem;
    padding-top: 2rem; border-top: 2px solid var(--rule);
}

.results.show {
    display: block;
}

.result-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem; background-color: var(--canvas); border-radius: var(--r-sm);
    margin-bottom: 0.75rem;
}

.result-label { color: var(--ink-60);
    font-size: 0.95rem;
}

.result-value {
    font-size: 1.3rem;
    font-weight: 600; color: var(--ink);
}

.result-row.loss .result-value {
    color: var(--negative);
}

.result-row.win .result-value {
    color: var(--positive);
}

.result-row.net { background-color: var(--surface); border: 2px solid var(--keyline);
    padding: 1.25rem;
    margin-top: 1rem;
}

.result-row.net .result-label { color: var(--ink);
    font-size: 1.1rem;
    font-weight: 600;
}

.result-row.net .result-value {
    font-size: 1.6rem; color: var(--info-strong);
}

.result-row.net.positive .result-value {
    color: var(--positive);
}

.result-row.net.negative .result-value {
    color: var(--negative);
}

.strategy-buttons {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
    margin: 1.5rem 0;
}

.strategy-btn {
    padding: 0.75rem; background-color: var(--canvas); border: 2px solid var(--rule); border-radius: var(--r-sm); color: var(--ink);
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 500;
}

.strategy-btn:hover { border-color: var(--keyline); background-color: var(--surface);
}

.strategy-btn.selected { border-color: var(--keyline); background-color: var(--surface);
}

.slider-group {
    margin-top: 1.5rem;
}

.slider-label {
    display: flex;
    justify-content: space-between;
    margin-bottom: 1rem;
    font-weight: 600; color: var(--ink);
}

input[type="range"] {
    width: 100%;
    height: 6px;
    background: var(--ink-70);
    outline: none;
    border-radius: var(--r-sm);
    -webkit-appearance: none;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px; background: var(--ink);
    cursor: pointer;
    border-radius: 50%;
}

input[type="range"]::-moz-range-thumb {
    width: 18px;
    height: 18px; background: var(--ink);
    cursor: pointer;
    border: none;
    border-radius: 50%;
}

.error {
    background-color: var(--negative-05);
    border-left: 4px solid var(--negative);
    color: var(--negative-deep);
    padding: 1rem;
    border-radius: var(--r-sm);
    margin-bottom: 1rem;
    display: none;
}

.error.show {
    display: block;
}

.input-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

@media (max-width: 640px) {
    h1 {
        font-size: 2rem;
    }

    .calculator-card {
        padding: 1.5rem;
    }

    .input-row {
        grid-template-columns: 1fr;
    }

    .result-value {
        font-size: 1.1rem;
    }
}