/* Shared button system. Replaces the 10 independent .btn implementations found in the audit. */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 18px;
    border-radius: var(--radius-sm);
    border: 1.5px solid transparent;
    font-family: var(--font-body);
    font-size: 13.5px;
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: .01em;
    white-space: nowrap;
    cursor: pointer;
    text-decoration: none;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
}
.btn:active { transform: translateY(1px); }
.btn:disabled,
.btn[aria-disabled="true"] { opacity: .55; cursor: not-allowed; pointer-events: none; }
.btn:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; }

.btn-primary {
    background: var(--color-primary);
    color: #ffffff;
    box-shadow: var(--shadow-sm);
}
.btn-primary:hover { background: var(--color-primary-dark); box-shadow: var(--shadow-md); }

.btn-secondary {
    background: var(--color-surface);
    color: var(--color-text-primary);
    border-color: var(--color-border);
}
.btn-secondary:hover { background: var(--color-background); border-color: var(--color-text-muted); }

.btn-outline {
    background: var(--color-surface);
    color: var(--color-primary);
    border-color: var(--color-primary);
}
.btn-outline:hover { background: var(--color-info-bg); }

.btn-ghost {
    background: transparent;
    color: var(--color-text-secondary);
}
.btn-ghost:hover { background: var(--color-background); color: var(--color-text-primary); }

.btn-danger {
    background: var(--color-danger-bg);
    color: var(--color-danger);
    border-color: var(--color-danger-bg);
}
.btn-danger:hover { background: var(--color-danger); color: #ffffff; }

.btn-success {
    background: var(--color-success);
    color: #ffffff;
}
.btn-success:hover { background: var(--color-success-dark); }

.btn-sm { padding: 6px 12px; font-size: 12px; }
.btn-lg { padding: 13px 24px; font-size: 15px; }
.btn-icon { padding: 10px; width: 38px; height: 38px; }
.btn-block { width: 100%; }