:root {
    --primary-color: #3b82f6;
    --secondary-color: #60a5fa;
    --background-color: #0f172a;
    --surface-color: #1e293b;
    --text-color: #e2e8f0;
    --text-secondary: #94a3b8;
    --border-color: #334155;
    --success-color: #22c55e;
    --input-bg: #1e293b;
    --input-border: #334155;
    --input-focus: #3b82f6;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
    min-height: 100vh;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

header {
    text-align: center;
    margin-bottom: 3rem;
}

header h1 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

header p {
    color: var(--text-secondary);
}

.calculator {
    background: var(--surface-color);
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.2);
}

.main-input {
    margin-bottom: 2rem;
}

.input-with-rate {
    display: flex;
    gap: 1rem;
    align-items: stretch;
}

.input-with-rate input {
    flex: 1;
    height: 100%;
}

.rate-indicator {
    background: var(--input-bg);
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    border: 1px solid var(--input-border);
    min-width: 150px;
    text-align: center;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.rate-label {
    display: block;
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
}

#exchangeRateDisplay {
    font-weight: 600;
    color: var(--primary-color);
}

.rates-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 2rem;
}

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

.input-group:last-child {
    margin-bottom: 0;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-secondary);
}

input {
    width: 100%;
    padding: 0.75rem;
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: 0.5rem;
    font-size: 1rem;
    color: var(--text-color);
    transition: all 0.2s;
}

input:focus {
    outline: none;
    border-color: var(--input-focus);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

button {
    display: none;
}

.results {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.result-item {
    display: flex;
    justify-content: space-between;
    margin-bottom: 1rem;
    font-size: 1.1rem;
    color: var(--text-secondary);
}

.result-item.total {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--primary-color);
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

footer {
    text-align: center;
    margin-top: 3rem;
    color: var(--text-secondary);
}

.safety-margin-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.toggle-container {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.toggle-label {
    margin: 0;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

input[type="checkbox"] {
    width: auto;
    margin: 0;
    cursor: pointer;
}

input[type="checkbox"]:checked + .toggle-label {
    color: var(--primary-color);
}

@media (max-width: 640px) {
    .container {
        padding: 1rem;
    }

    .calculator {
        padding: 1.5rem;
    }

    .input-with-rate {
        flex-direction: column;
    }

    .rates-container {
        grid-template-columns: 1fr;
    }

    header h1 {
        font-size: 1.5rem;
    }
}

.money-input-container {
    position: relative;
    flex: 1;
    display: flex;
    align-items: center;
}

.money-input-container input {
    padding-right: 2.5rem;
}

.clear-button {
    position: absolute;
    right: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.25rem;
    padding: 0.25rem;
    cursor: pointer;
    display: none;
    width: auto;
    line-height: 1;
    border-radius: 50%;
    transition: all 0.2s;
}

.clear-button:hover {
    color: var(--text-color);
    background-color: var(--input-bg);
}

.money-input-container input:not(:placeholder-shown) + .clear-button {
    display: block;
}

/* Remove spinner buttons from number input */
input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

input[type="number"] {
    -moz-appearance: textfield;
}