:root {
    --bg-color: #0d1117;
    --card-bg: #161b22;
    --panel-bg: #21262d;
    --text-main: #c9d1d9;
    --text-muted: #b0b8c1;
    --border-color: #30363d;
    --accent: #58a6ff;
    --accent-hover: #3182ce;
    --input-bg: #0d1117;
}

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    font-family: 'Inter', sans-serif;
    -webkit-font-smoothing: antialiased;
}

.text-muted {
    color: var(--text-muted) !important;
}

.app-container {
    background: radial-gradient(circle at top right, rgba(88, 166, 255, 0.05) 0%, transparent 40%),
        radial-gradient(circle at bottom left, rgba(88, 166, 255, 0.02) 0%, transparent 40%);
}

.converter-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    width: 100%;
    max-width: 800px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5) !important;
}

.currency-panel {
    background-color: var(--panel-bg);
    padding: 1.5rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: border-color 0.2s;
}

.currency-panel:focus-within {
    border-color: var(--accent);
}

.currency-select,
.amount-input {
    background-color: var(--input-bg);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    font-size: 1.25rem;
    font-weight: 500;
    border-radius: 8px;
    padding: 0.75rem 1rem;
    transition: all 0.2s ease-in-out;
}

.currency-select {
    cursor: pointer;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%238b949e' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='m2 5 6 6 6-6'/%3e%3c/svg%3e");
}

.currency-select:focus,
.amount-input:focus {
    background-color: var(--input-bg);
    border-color: var(--accent);
    color: var(--text-main);
    box-shadow: 0 0 0 2px rgba(88, 166, 255, 0.2) !important;
}

.amount-input::-webkit-outer-spin-button,
.amount-input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

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

.amount-input:read-only {
    background-color: #1a1f26;
    color: var(--text-main);
}

.btn-swap {
    background-color: var(--panel-bg);
    border: 1px solid var(--border-color);
    color: var(--accent);
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: all 0.2s ease;
    z-index: 10;
}

.btn-swap:hover {
    background-color: var(--border-color);
    color: var(--text-main);
    transform: scale(1.05);
}

.footer {
    background-color: var(--card-bg);
    border-top: 1px solid var(--border-color);
}

.footer-link {
    color: var(--accent);
    text-decoration: none;
    transition: color 0.2s;
}

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

@media (max-width: 767.98px) {
    .swap-container {
        margin: -0.5rem 0;
    }

    .converter-card {
        padding: 1.5rem !important;
        margin: 1rem;
    }

    .currency-select,
    .amount-input {
        font-size: 1.1rem;
        padding: 0.6rem 0.8rem;
    }

    .currency-panel {
        padding: 1rem;
    }

    .chart-container {
        height: 250px !important;
    }
}