:root {
    --color-primary: #ce1141; /* Fanatics Red */
    --color-primary-dark: #a00d32;
    --color-text: #333333;
    --color-text-light: #666666;
    --color-bg: #ffffff;
    --color-bg-light: #f5f5f5;
    --color-border: #dddddd;
    --color-error: #d32f2f;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --font-family: 'Roboto', sans-serif;
    --header-height: 60px;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-family);
    background-color: var(--color-bg-light);
    color: var(--color-text);
    line-height: 1.5;
    height: 100vh;
    display: flex;
    flex-direction: column;
}

#app {
    flex: 1;
    display: flex;
    flex-direction: column;
    height: 100%;
}

/* Utility Classes */
.container {
    max-width: 600px;
    margin: 0 auto;
    padding: var(--spacing-md);
    width: 100%;
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.card {
    background: var(--color-bg);
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.header {
    background-color: #111;
    color: white;
    height: var(--header-height);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 var(--spacing-md);
    font-weight: 700;
    font-size: 1.2rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

h1, h2, h3 {
    margin-bottom: var(--spacing-sm);
}

/* Form Elements */
input, select {
    width: 100%;
    padding: 12px 16px;
    font-size: 16px; /* Prevent zoom on iOS */
    border: 1px solid var(--color-border);
    border-radius: 4px;
    outline: none;
    transition: border-color 0.2s;
}

input:focus, select:focus {
    border-color: var(--color-primary);
}

button {
    background-color: var(--color-primary);
    color: white;
    border: none;
    padding: 14px 24px;
    font-size: 16px;
    font-weight: 500;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.2s;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

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

button:disabled {
    background-color: #ccc;
    cursor: not-allowed;
}

button.secondary {
    background-color: transparent;
    color: var(--color-text-light);
    border: 1px solid var(--color-border);
}

button.secondary:hover {
    background-color: #f0f0f0;
    color: var(--color-text);
}

.error-message {
    color: var(--color-error);
    font-size: 0.9rem;
    margin-top: var(--spacing-sm);
    text-align: center;
    min-height: 1.4em;
}

.spinner {
    border: 4px solid rgba(0, 0, 0, 0.1);
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border-left-color: var(--color-primary);
    animation: spin 1s linear infinite;
    margin: 20px auto;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Mobile optimizations */
@media (max-width: 480px) {
    .container {
        padding: var(--spacing-sm);
    }
    .card {
        padding: var(--spacing-md);
    }
}