:root {
    /* Theme variables */
    --primary-color: #4CAF50;
    --primary-dark: #388E3C;
    --primary-light: #C8E6C9;
    --accent-color: #FF9800;
    --text-primary: #212121;
    --text-secondary: #757575;
    --divider-color: #BDBDBD;
    --background-color: #F5F5F5;
    --card-background: #FFFFFF;
    --success-color: #4CAF50;
    --error-color: #F44336;

    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;

    --border-radius: 8px;
    --box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

/* General page layout */
body {
    margin: 0;
    min-height: 100vh;
    height: 100vh;
    display: flex;
    flex-direction: column;
    background-color: var(--background-color);
    color: var(--text-primary);
    font-family: system-ui, -apple-system, sans-serif;
    overflow: hidden;
}

header {
    flex: 0 0 auto;
    padding: var(--spacing-lg);
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-color));
    color: white;
    text-align: center;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

header h1 {
    margin: 0;
    font-size: 2.5rem;
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 2px;
    position: relative;
    display: inline-block;
    padding: 0 var(--spacing-xl);
}

/* Add sparkle effect */
header h1::before,
header h1::after {
    content: "✨";
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.5rem;
    opacity: 0.8;
}

header h1::before {
    left: -5px;
    animation: sparkle 2s ease-in-out infinite;
}

header h1::after {
    right: -5px;
    animation: sparkle 2s ease-in-out infinite 1s;
}

@keyframes sparkle {
    0%, 100% { opacity: 0.8; transform: translateY(-50%) scale(1); }
    50% { opacity: 1; transform: translateY(-50%) scale(1.2); }
}

main {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: var(--spacing-md);
    overflow: hidden;
    min-height: 0;
}

.input-section {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md);
}

.input-group {
    display: flex;
    gap: var(--spacing-sm);
    max-width: 600px;
    width: 100%;
}

.input-group input {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 2px solid var(--primary-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
    min-width: 200px;
}

.input-group button {
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    font-size: 1rem;
    cursor: pointer;
    transition: background-color 0.3s ease;
    white-space: nowrap;
}

footer {
    flex: 0 0 auto;
    padding: var(--spacing-sm);
    background-color: var(--primary-dark);
    color: white;
    text-align: center;
}

footer a {
    color: var(--primary-light);
    text-decoration: none;
    transition: color 0.3s ease;
}

footer a:hover {
    color: white;
    text-decoration: underline;
}

/* General form styling */
form {
    margin-bottom: var(--spacing-md);
}

input, button {
    padding: var(--spacing-sm);
    border-radius: var(--border-radius);
    border: 1px solid var(--divider-color);
}

button {
    background-color: var(--primary-color);
    color: white;
    border: none;
    cursor: pointer;
}

button:hover {
    background-color: var(--primary-dark);
}

button:disabled {
    background-color: var(--divider-color);
    cursor: not-allowed;
}

/* Loading and error messages */
.loading, .error {
    text-align: center;
    padding: var(--spacing-lg);
    font-size: 1.2rem;
    color: var(--text-primary);
}

.error {
    color: var(--error-color);
}

/* Add a loading animation */
.loading::after {
    content: '...';
    animation: loading 1.5s infinite;
}

@keyframes loading {
    0% { content: '.'; }
    33% { content: '..'; }
    66% { content: '...'; }
}