@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

:root {
    --font-family: 'Inter', sans-serif;

    --color-background: #f0f2f5;
    --color-surface: #ffffff;
    --color-text-primary: #1c1e21;
    --color-text-secondary: #606770;
    --color-border: #dce1e6;
    --color-primary: #0866ff;
    --color-primary-hover: #005ce6;
    --color-success: #31a24c;
    --color-warning: #f7b924;
    --color-danger: #e02c46;
    --color-icon: #606770;

    --shadow-small: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-medium: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-large: 0 12px 28px rgba(0, 0, 0, 0.15);

    --border-radius: 12px;
    --transition-speed: 0.2s;
}

[data-theme="dark"] {
    --color-background: #18191a;
    --color-surface: #242526;
    --color-text-primary: #e4e6eb;
    --color-text-secondary: #b0b3b8;
    --color-border: #3a3b3c;
    --color-primary: #2374e1;
    --color-primary-hover: #3982e4;
    --color-icon: #b0b3b8;
}

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

html {
    font-family: var(--font-family);
    line-height: 1.5;
    height: 100%;
}

body {
    height: 100%;
    background-color: var(--color-background);
    color: var(--color-text-primary);
}

.page-container {
    display: flex;
    flex-direction: column;
    min-height: 100%;
}

.main-content {
    flex-grow: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.converter-wrapper {
    width: 100%;
    max-width: 480px;
    background-color: var(--color-surface);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-medium);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.converter-header {
    padding: 1.5rem 1.5rem 1rem;
    text-align: center;
    position: relative;
    border-bottom: 1px solid var(--color-border);
}

.converter-header h1 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.converter-header p {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
}

.theme-toggle {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: none;
    border: none;
    color: var(--color-icon);
    cursor: pointer;
    font-size: 1.25rem;
    padding: 0.5rem;
    border-radius: 50%;
    transition: background-color var(--transition-speed);
}

.theme-toggle:hover {
    background-color: rgba(0, 0, 0, 0.05);
}

[data-theme="dark"] .theme-toggle:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.theme-toggle .fa-moon { display: none; }
[data-theme="dark"] .theme-toggle .fa-moon { display: inline-block; }
[data-theme="dark"] .theme-toggle .fa-sun { display: none; }

.converter-body {
    padding: 1.5rem;
}

.converter-inputs {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.input-container {
    flex: 1;
}

.input-container label,
.amount-container label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    display: block;
    margin-bottom: 0.5rem;
}

.input-container input,
.amount-container input {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    background-color: var(--color-background);
    color: var(--color-text-primary);
    font-size: 1rem;
    transition: border-color var(--transition-speed), box-shadow var(--transition-speed);
}

.input-container input:focus,
.amount-container input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-primary) 20%, transparent);
}

.country-select {
    width: 100%;
}

.country-select .country-list {
    background-color: var(--color-background);
}

.country-select .country-select-flag {
    top: 50%;
    transform: translateY(-50%);
}

.swap-button {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 1px solid var(--color-border);
    background-color: var(--color-surface);
    color: var(--color-icon);
    cursor: pointer;
    display: grid;
    place-items: center;
    font-size: 1rem;
    transition: transform var(--transition-speed), background-color var(--transition-speed);
    margin-top: 1.75rem;
}

.swap-button:hover {
    transform: rotate(180deg);
    background-color: var(--color-background);
}

.converter-footer {
    background-color: var(--color-background);
    padding: 1.5rem;
    text-align: center;
    transition: background-color var(--transition-speed);
}

#result-primary {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: 0.25rem;
}

#result-secondary {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
}

.converter-footer.success { background-color: color-mix(in srgb, var(--color-success) 15%, var(--color-background)); }
.converter-footer.success #result-primary { color: var(--color-success); }
.converter-footer.warning { background-color: color-mix(in srgb, var(--color-warning) 15%, var(--color-background)); }
.converter-footer.warning #result-primary { color: var(--color-warning); }
.converter-footer.danger { background-color: color-mix(in srgb, var(--color-danger) 15%, var(--color-background)); }
.converter-footer.danger #result-primary { color: var(--color-danger); }

.page-footer {
    flex-shrink: 0;
    text-align: center;
    padding: 1.5rem;
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.page-footer a {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 500;
}

.page-footer a:hover {
    text-decoration: underline;
}

/* --- FIX: Responsive styles for mobile devices --- */
@media (max-width: 576px) {
    .converter-inputs {
        flex-direction: column;
    }

    .input-container{
        width: 100%;
    }

    .swap-button {
        margin-top: 0;
        transform: rotate(90deg);
    }

    .swap-button:hover {
        transform: rotate(270deg);
    }
}