:root {
    --primary-color: #0056b3;
    --secondary-color: #f4f4f4;
    --text-color: #333;
    --card-bg: #ffffff;
    --border-radius: 8px;
    --box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--secondary-color);
    color: var(--text-color);
    margin: 0;
    padding: 20px;
    line-height: 1.6;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    min-height: 100vh;
}

.container {
    width: 100%;
    max-width: 700px;
}

/* --- UPDATED HEADER --- */
header {
    display: flex;
    align-items: center;
    justify-content: space-between; /* Pushes items to opposite ends */
    gap: 15px;
    margin-bottom: 30px;
}

.header-main {
    display: flex;
    align-items: center;
    gap: 15px;
}

#lang-toggle {
    background-color: var(--secondary-color);
    border: 1px solid #ccc;
    padding: 8px 16px;
    border-radius: 20px;
    cursor: pointer;
    font-weight: 600;
    transition: background-color 0.2s;
}

#lang-toggle:hover {
    background-color: #e2e2e2;
}


/* --- DIRECTIONAL STYLES --- */
html[dir="rtl"] header { text-align: right; }
html[dir="ltr"] header { text-align: left; }
html[dir="rtl"] .explanation { border-right: 4px solid #ddd; border-left: none; }
html[dir="ltr"] .explanation { border-left: 4px solid #ddd; border-right: none; }
html[dir="rtl"] .results { border-right: 5px solid var(--primary-color); border-left: none; }
html[dir="ltr"] .results { border-left: 5px solid var(--primary-color); border-right: none; }


.logo {
    width: 55px;
    height: 55px;
    flex-shrink: 0;
}
.logo svg {
    width: 100%;
    height: 100%;
    display: block; 
}
.header-text h1 {
    margin: 0;
    color: var(--primary-color);
    font-size: 1.8rem;
}
.header-text p {
    margin: 0;
    font-size: 1rem;
}
.card {
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 25px;
    margin-bottom: 25px;
}
.card h2 {
    margin-top: 0;
    border-bottom: 2px solid var(--secondary-color);
    padding-bottom: 10px;
    margin-bottom: 20px;
}
.form-group {
    margin-bottom: 20px;
}
.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
}
.form-group input, .form-group select {
    width: 100%;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 4px;
    box-sizing: border-box;
    font-size: 1rem;
}
.interest-type {
    display: flex;
    align-items: center;
    gap: 20px;
}
.interest-type div {
    display: flex;
    align-items: center;
    gap: 5px;
}
.interest-type input[type="radio"] {
    width: auto;
}
.explanation {
    font-size: 0.9rem;
    background-color: #f9f9f9;
    padding: 10px 15px;
    margin: 10px 0 20px 0;
}
.explanation p {
    margin: 5px 0;
}
.results {
    margin-top: 20px;
    background-color: #eef7ff;
    padding: 15px;
    border-radius: var(--border-radius);
}
.results p {
    margin: 8px 0;
    display: flex;
    justify-content: space-between;
}
.results span {
    font-weight: bold;
}
.converter-group {
    display: flex;
    align-items: center;
    gap: 15px;
}
.converter-group .form-group {
    flex: 1;
}
.icon-swap {
    font-size: 1.5rem;
    color: var(--primary-color);
    cursor: pointer;
    padding-top: 20px;
}
#currency-result {
    font-size: 1.2rem;
    font-weight: bold;
    text-align: center;
}
.last-updated {
    text-align: center;
    font-size: 0.8rem;
    color: #777;
    margin-top: 15px;
}
@media (max-width: 600px) {
    .converter-group { flex-direction: column; }
    .icon-swap { transform: rotate(90deg); padding-top: 0; }
    .interest-type { flex-direction: column; align-items: flex-start; gap: 10px; }
    header { flex-direction: column; gap: 10px; }
}