/* Global */
body, html {
    margin: 0;
    padding: 0;
    font-family: 'Arial', sans-serif;
    background: #f8f9fa;
    color: #333;
}

/* Header */
header {
    background: #30ce7d;
    color: white;
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}
header .logo {
    font-size: 1.6em;
    font-weight: bold;
}
nav a {
    color: white;
    margin: 0 10px;
    text-decoration: none;
    font-weight: 600;
}
nav a:hover { text-decoration: underline; }
.lang-switch button {
    background: none;
    border: none;
    font-size: 1.3em;
    cursor: pointer;
    margin-left: 8px;
}

/* Container */
.container,
.main-container,
.form-panel,
.image-panel {
    max-width: 980px;
    margin: 0 auto;
    box-sizing: border-box;
}

/* Two-column layout */
.main-container {
    display: flex;
    flex-wrap: wrap;
    margin: 40px auto;
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 6px 25px rgba(0, 0, 0, 0.1);
}

/* Form Panel */
.form-panel {
    flex: 1 1 400px;
    padding: 40px;
}
.form-panel h2, .form-panel h3 { color: #30ce7d; }
.form-panel .error { color: red; margin: 12px 0; }
input, textarea {
    width: 100%;
    padding: 12px;
    margin: 8px 0;
    border: 1px solid #ccc;
    border-radius: 8px;
    font-size: 1em;
}
button {
    padding: 12px 25px;
    background: #30ce7d;
    color: white;
    border: none;
    border-radius: 8px;
    font-weight: bold;
    cursor: pointer;
    transition: 0.3s;
}
button:hover { background: #28a765; }

/* Image Panel */
.image-panel {
    flex: 1 1 400px;
    background: url('../images/tax-holder-hero.jpg') center/cover no-repeat;
    min-height: 350px;
}

/* Footer */
footer {
    background: #333;
    color: white;
    padding: 25px 20px;
    text-align: center;
    margin-top: 40px;
}
footer a { color: white; margin: 0 12px; text-decoration: none; }
footer a:hover { text-decoration: underline; }

/* Responsive */
@media(max-width: 768px){
    .main-container { flex-direction: column; }
    .image-panel { height: 200px; }
}