:root {
    /* Colors */
    --color-primary: #2563eb;
    --color-primary-hover: #1d4ed8;
    --color-text: #333;
    --color-text-muted: #666;
    --color-background: white;
    --color-border: #ddd;
    --color-error: #dc2626;
    --color-error-light: #fee2e2;
    --color-error-border: #fecaca;
    --color-success: #16a34a;
    --color-success-light: #dcfce7;
    --color-success-border: #bbf7d0;

    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-6: 1.5rem;
    --space-8: 2rem;

    /* Typography */
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 2rem;
}

body {
    font-family: sans-serif;
    box-sizing: border-box;
    margin: 0;
    line-height: 1.5;
    background-color: var(--color-background);
    color: var(--color-text);
}

main {
    margin: auto;
    max-width: 600px;
    padding: var(--space-8) var(--space-4);
}

h1 {
    letter-spacing: -1px;
    font-weight: normal;
    font-size: var(--font-size-lg);
    margin: var(--space-4) 0;
}

form {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);

    & label {
        font-weight: 500;
    }
}

input {
    width: 100%;
    display: block;
    box-sizing: border-box;
    padding: var(--space-2);
    border: 1px solid var(--color-border);
    border-radius: 4px;
    font-size: var(--font-size-base);

    &:focus {
        outline: 2px solid var(--color-primary);
        outline-offset: -1px;
    }
}

button {
    box-sizing: border-box;
    width: fit-content;
    margin-top: var(--space-2);
    background-color: var(--color-primary);
    color: white;
    border: none;
    padding: var(--space-3) var(--space-8);
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.2s;
    font-size: var(--font-size-base);

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

.links {
    margin-top: var(--space-4);
    display: flex;
    gap: var(--space-4);
    justify-content: center;

    & a {
        color: var(--color-primary);
        text-decoration: none;

        &:hover {
            text-decoration: underline;
        }
    }
}

.message {
    margin: var(--space-4) 0;
    padding: var(--space-4);
    border-radius: 4px;

    &.error {
        background-color: var(--color-error-light);
        color: var(--color-error);
        border: 1px solid var(--color-error-border);
    }

    &.success {
        background-color: var(--color-success-light);
        color: var(--color-success);
        border: 1px solid var(--color-success-border);
    }
}

.helper-text {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin-top: var(--space-1);
}

.terms {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin-top: var(--space-4);
}

/* ALTCHA Widget Styles */
altcha-widget {
    display: block;
    width: 100%;
    box-sizing: border-box;
    padding: var(--space-2);
    border: 1px solid var(--color-border);
    border-radius: 4px;
    font-size: var(--font-size-base);
    min-height: 60px;
    background-color: var(--color-background);
    transition: border-color 0.2s;

    &:focus-within {
        outline: 2px solid var(--color-primary);
        outline-offset: -1px;
        border-color: var(--color-primary);
    }
}

altcha-widget[data-state="solved"] {
    border-color: var(--color-success);
    background-color: var(--color-success-light);
}

altcha-widget[data-state="error"] {
    border-color: var(--color-error);
    background-color: var(--color-error-light);
}