/* Light mode (default) */
body {
    background: #f8f9fa;
    color: #212529;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    min-height: 100vh;
    margin: 0;
    padding: 0;
    transition: background 0.3s, color 0.3s;
}

body.dark {
    background: #121212;
    color: #e0e0e0;
}

.container {
    max-width: 800px;
    margin: 120px auto 60px;
    padding: 0 20px;
}

.card {
    background: white;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    padding: 40px;
}

body.dark .card {
    background: #1e1e1e;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
}

h1 {
    text-align: center;
    font-size: 3em;
    margin-bottom: 10px;
}

.subtitle {
    text-align: center;
    font-size: 1.5em;
    margin-bottom: 40px;
    color: #666;
}

body.dark .subtitle {
    color: #aaa;
}

textarea {
    width: 100%;
    padding: 20px;
    border-radius: 12px;
    border: 1px solid #ddd;
    background: #f8f9fa;
    color: #212529;
    font-size: 16px;
    height: 200px;
    margin-bottom: 30px;
    box-sizing: border-box;  /* <--- ADD THIS LINE */
}

body.dark textarea {
    background: #2d2d2d;
    border-color: #444;
    color: #e0e0e0;
}

.option-title {
    font-size: 1.5em;
    text-align: center;
    margin: 30px 0 15px;
}

.option-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 15px;
    margin-bottom: 30px;
}

.option-label {
    background: #e9ecef;
    padding: 20px;
    border-radius: 12px;
    text-align: center;
    cursor: pointer;
    transition: background 0.2s;
}

body.dark .option-label {
    background: #2d2d2d;
}

.option-label:hover {
    background: #dee2e6;
}

body.dark .option-label:hover {
    background: #3a3a3a;
}

.checkbox-label {
    display: block;
    margin: 25px 0;
    font-size: 1.2em;
    cursor: pointer;
}

.hidden-field {
    width: 100%;
    padding: 15px;
    border-radius: 12px;
    border: 1px solid #ddd;
    background: #f8f9fa;
    color: #212529;
    margin-bottom: 20px;
    display: none;
}

body.dark .hidden-field {
    background: #2d2d2d;
    border-color: #444;
    color: #e0e0e0;
}

.create-button {
    width: 100%;
    padding: 20px;
    background: #e74c3c;
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 1.8em;
    font-weight: bold;
    cursor: pointer;
    transition: background 0.2s;
}

.create-button:hover {
    background: #c0392b;
}

.success-box {
    background: #d4edda;
    color: #155724;
    padding: 40px;
    border-radius: 16px;
    text-align: center;
}

body.dark .success-box {
    background: #0f5132;
    color: #d1e7dd;
}

.copy-input {
    flex: 1;
    padding: 15px;
    border-radius: 8px 0 0 8px;
    border: 1px solid #ccc;
    background: white;
    color: #212529;
}

body.dark .copy-input {
    background: #333;
    color: #e0e0e0;
    border-color: #444;
}

.copy-button {
    padding: 15px 30px;
    background: #007bff;
    color: white;
    border: none;
    border-radius: 0 8px 8px 0;
    cursor: pointer;
}

footer {
    text-align: center;
    padding: 40px;
    color: #666;
    font-size: 14px;
}

body.dark footer {
    color: #999;
}

footer a {
    color: #007bff;
    text-decoration: underline;
}

body.dark footer a {
    color: #4da3ff;
}

/* Theme Toggle */
.theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 999;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 28px;
}