/* Basic Reset & Defaults */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --bg-dark: #1a1a1a;
    --text-dark: #e0e0e0;
    --primary-dark: #4a90e2; /* A blue accent */
    --card-dark: #2c2c2c;
    --border-dark: #444;

    --bg-light: #f4f4f4;
    --text-light: #333;
    --primary-light: #3a7bc8;
    --card-light: #ffffff;
    --border-light: #ccc;

    --error-color: #e74c3c;
    --success-color: #2ecc71;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
    min-height: 100vh;
    display: flex;
    flex-direction: column;

    /* Dark mode by default */
    background-color: var(--bg-dark);
    color: var(--text-dark);
}

body.light-mode {
    background-color: var(--bg-light);
    color: var(--text-light);
}

/* Header */
header {
    background-color: var(--card-dark);
    padding: 1rem 2rem;
    border-bottom: 1px solid var(--border-dark);
    transition: background-color 0.3s ease, border-bottom 0.3s ease;
}

body.light-mode header {
    background-color: var(--card-light);
    border-bottom: 1px solid var(--border-light);
}

.header-content {
    max-width: 1000px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    height: 40px; /* Adjust as needed */
    width: auto;
}

.header-buttons button {
    background: none;
    border: 1px solid var(--border-dark);
    color: var(--text-dark);
    padding: 0.5rem 0.8rem;
    margin-left: 0.5rem;
    cursor: pointer;
    border-radius: 4px;
    font-size: 0.9rem;
    transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

body.light-mode .header-buttons button {
    border: 1px solid var(--border-light);
    color: var(--text-light);
}

.header-buttons button:hover {
    background-color: var(--primary-dark);
    border-color: var(--primary-dark);
    color: #fff; /* Make text white on hover for dark primary */
}

body.light-mode .header-buttons button:hover {
    background-color: var(--primary-light);
    border-color: var(--primary-light);
    color: #fff;
}

.header-buttons .lang-button.active {
    background-color: var(--primary-dark);
    border-color: var(--primary-dark);
    color: #fff;
    font-weight: bold;
}

body.light-mode .header-buttons .lang-button.active {
    background-color: var(--primary-light);
    border-color: var(--primary-light);
    color: #fff;
}

#theme-toggle {
    font-size: 1.2rem; /* Make icon slightly larger */
    padding: 0.3rem 0.6rem;
}

/* Main Content & Form */
main {
    flex-grow: 1;
    padding: 2rem;
    display: flex;
    justify-content: center;
    align-items: center;
}

.form-wrapper {
    background-color: var(--card-dark);
    padding: 2rem 2.5rem;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    max-width: 600px;
    width: 100%;
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

body.light-mode .form-wrapper {
    background-color: var(--card-light);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.form-wrapper h1 {
    text-align: center;
    margin-bottom: 1.5rem;
    color: var(--text-dark);
    font-weight: 500;
}

body.light-mode .form-wrapper h1 {
     color: var(--text-light);
}

.form-group {
    margin-bottom: 1.2rem;
}

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

body.light-mode .form-group label {
     color: var(--text-light);
}

.form-group label.required::after {
    content: attr(data-translate-required-indicator); /* Use JS-set attribute for asterisk */
    color: var(--error-color);
    margin-left: 4px;
    font-weight: bold;
}


.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="tel"],
.form-group textarea {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid var(--border-dark);
    border-radius: 4px;
    background-color: var(--bg-dark); /* Slightly different shade for inputs */
    color: var(--text-dark);
    font-size: 1rem;
    transition: border-color 0.2s ease, background-color 0.3s ease, color 0.3s ease;
}

body.light-mode .form-group input[type="text"],
body.light-mode .form-group input[type="email"],
body.light-mode .form-group input[type="tel"],
body.light-mode .form-group textarea {
    border: 1px solid var(--border-light);
    background-color: #fff; /* White input background in light mode */
    color: var(--text-light);
}


.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-dark);
    box-shadow: 0 0 0 2px rgba(74, 144, 226, 0.3); /* Subtle focus ring */
}

body.light-mode .form-group input:focus,
body.light-mode .form-group textarea:focus {
    border-color: var(--primary-light);
    box-shadow: 0 0 0 2px rgba(58, 123, 200, 0.3);
}


.form-group textarea {
    resize: vertical; /* Allow vertical resize */
    min-height: 100px;
}

.submit-button {
    display: block;
    width: 100%;
    padding: 0.9rem 1.5rem;
    background-color: var(--primary-dark);
    color: #fff;
    border: none;
    border-radius: 4px;
    font-size: 1.1rem;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s ease;
    margin-top: 1rem;
}

body.light-mode .submit-button {
     background-color: var(--primary-light);
}


.submit-button:hover {
    background-color: #3a7bc8; /* Slightly darker blue on hover */
}

body.light-mode .submit-button:hover {
    background-color: #2e6ab7;
}


/* Error and Status Messages */
.error-message {
    color: var(--error-color);
    font-size: 0.85rem;
    display: block; /* Changed to block */
    min-height: 1.2em; /* Reserve space to prevent layout shifts */
    margin-top: 0.3rem;
}

.form-group input.error,
.form-group textarea.error {
    border-color: var(--error-color);
}

.status-message {
    padding: 1rem;
    margin-bottom: 1.5rem;
    border-radius: 4px;
    text-align: center;
    font-weight: 500;
}

.status-message.success {
    background-color: rgba(46, 204, 113, 0.2); /* Light green background */
    color: var(--success-color);
    border: 1px solid var(--success-color);
}

.status-message.error {
    background-color: rgba(231, 76, 60, 0.1); /* Light red background */
    color: var(--error-color);
    border: 1px solid var(--error-color);
}


/* Footer */
footer {
    text-align: center;
    padding: 1.5rem 2rem;
    margin-top: 2rem; /* Add some space above footer */
    font-size: 0.9rem;
    color: #aaa; /* Lighter text for footer */
    border-top: 1px solid var(--border-dark);
    transition: border-top 0.3s ease, color 0.3s ease;
}

body.light-mode footer {
    color: #666;
    border-top: 1px solid var(--border-light);
}


/* Responsive Adjustments (Optional but Recommended) */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        align-items: center;
    }
    .logo {
        margin-bottom: 0.5rem;
    }
    .header-buttons {
        margin-top: 0.5rem;
    }
    main {
        padding: 1rem;
    }
    .form-wrapper {
        padding: 1.5rem;
    }
}