/* Buttons */
.button {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    font-family: var(--font-primary);
    font-size: 1rem;
    font-weight: 700;
    text-align: center;
    text-decoration: none;
    border-radius: var(--border-radius);
    border: 1px solid transparent;
    cursor: pointer;
    transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
    line-height: 1.5;
    white-space: nowrap;
}

.button:hover,
.button:focus {
    text-decoration: none;
    box-shadow: var(--shadow-sm);
}

.button-primary {
    background-color: var(--color-primary);
    color: var(--color-surface);
    border-color: var(--color-primary);
}
.button-primary:hover,
.button-primary:focus {
    background-color: #455A64; /* Darker blue-grey */
    border-color: #455A64;
    color: var(--color-surface);
}

.button-secondary {
    background-color: var(--color-surface);
    color: var(--color-secondary);
    border-color: var(--color-secondary);
}
.button-secondary:hover,
.button-secondary:focus {
    background-color: var(--color-secondary);
    border-color: var(--color-secondary);
    color: var(--color-surface);
}

.button-accent {
    background-color: var(--color-accent);
    color: var(--color-surface);
    border-color: var(--color-accent);
}
.button-accent:hover,
.button-accent:focus {
    background-color: #66BB6A; /* Darker gentle green */
    border-color: #66BB6A;
    color: var(--color-surface);
}

.button-danger {
    background-color: var(--color-surface);
    color: var(--color-error);
    border-color: var(--color-error);
}
.button-danger:hover,
.button-danger:focus {
    background-color: var(--color-error);
    border-color: var(--color-error);
    color: var(--color-surface);
}

.button-small {
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: 0.9rem;
}

/* Modals */
.modal {
    display: none; /* Hidden by default */
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.5); /* Dim background */
}

.modal-content {
    background-color: var(--color-surface);
    margin: 15% auto;
    padding: var(--spacing-xl);
    border: var(--border-standard);
    border-radius: var(--border-radius);
    width: 90%;
    max-width: 500px;
    box-shadow: var(--shadow-lg);
    position: relative;
}

.close-button {
    color: var(--color-text-subtle);
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-md);
    font-size: 1.5rem;
    font-weight: bold;
    line-height: 1;
    cursor: pointer;
    transition: color 0.2s ease;
}

.close-button:hover,
.close-button:focus {
    color: var(--color-text-primary);
    text-decoration: none;
}

/* Cards (Generic) */
.card {
    background-color: var(--color-surface);
    border: var(--border-standard);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    transition: box-shadow 0.2s ease;
}

.card:hover {
    box-shadow: var(--shadow-md);
}